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geometry
In the tests of a new pharmaceutical product, data were collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data ...
Biology Research Paper
This is my essay on fossil fuels. Can This is my essay on fossil fuels. Can someone please check to see if there are any improvements that can be made? Also, I need help writing a conclusion. Have you ever thought about where your electricity comes from? What the petroleum you...
Environmental Science
34. In two or three well-developed paragraphs, list four federal laws that relate to mining and reclaiming mined land, and state examples of provisions of each. Can I please get some help on this question? Thank you. Environmental Science - y912f, Monday, March 15, 2010 at 2:5...
Chemistry
State whether each of the following aqueous solutions would be acidic, basic, or neutral. Include appropriate net-ionic equations to show why a given solution is acidic or basic. a) NaNO3 b)KC6H5CO2 c)50:50 mixture of C6H5CO2H+KC6H5CO2 d)(CH3NH3)Cl e)50:50 mixture of CH3NH2+(C...
Chemistry
What substance is a better oxidizing agent in each of the following pairs? Explain. a) Co2+ or Cr3+ b) Mn2+ or I2 I think C02+ and I2 because they are above on the table. Is this correct or do I need more information in my answer?
Child Care Management
I have a questions that I have answered If some one could just check it Thanks. Neuron development and elaboration, which occurs between birth and age 10, is prompted by A.aural prompts from the family,school, and enviroment. B.physical movement on the part of the child. C.int...
Chemistry
Given an unknown mixture consisting of two or more substances, explain how we could determine whether that mixture is a true solution, a colloid, or a suspension
chemistry
DATA TABLE 2: SPOT TESTS OF SUPERNATANT SAMPLES FROM REACTION TUBES Substance Added Tube 1 Ppt.? Tube 2 Ppt.? Tube 3 Ppt.? Tube 4 Ppt.? Tube 5 Ppt.? Tube 6 Ppt.? Pb(NO3)2 yes yes no no no no NaI no no no yes yes yes reagent present in excess How do I identify whether or not re...
Chemistry
What is the specific heat of a substance if 35.5 kJ are required to raise the temperature of 345 g of the substance from 69.0°C to 150.0°C?
Chemistry
46.9 g of a substance at 90.8°C is added to 51.8 g of water at 24.8°C. The final temperature of the water and substance is 40.5°C. The specific heat of water is 4.184 J/g·°C. What is the specific heat of the substance? I think the equation that I need to...
Chemistry
What is the specific heat of a substance if 26.0 kJ are required to raise the temperature of 250. g of the substance from 34.0°C to 201.0°C?
chemistry
when 10.0 grams of an unknown substance is dissolved in 50. grams of water, the new freezing point becomes -3.00C. What is the molar mass of the compound? For this question can some one tell me the formulas I need to solve for this problem and I can fill in the rest
chemistry
calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.
Chemistry
In chemistry, for a given substance what information links mass to moles? number of particles to moles?
chemistry
Suppose you tried to combine 42 grams of magnesium with 42 grams of oxygen. Which of the two substances would have some left after the reaction and how much magnesium oxide would be formed?
Chemistry
If 406.6 g of a substance is dissolved in 879.1 g of cyclohexane solvent, the boiling point of the solution is 87.52 oC. Calculate the apparent molar mass (g/mol) of substance.
Anatomy & Physiology II
I've included answers as well. Thanks in advance. 1. Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called: a. enzymes b. antibodies c. proteins d. hormones I chose D as an answer. 2. ...
Anatomy & Physiology II
I've included answers as well. Thanks in advance. 1. Chemical substances secreted by cells into the extracellular fluids that regulate the metabolic function of other cells in the body are called: a. enzymes b. antibodies c. proteins d. hormones I chose D as an answer. 2. ...
Chemistry
What type of extraction can be used to seperate Hexane and a substance soluble in it?
Honors Chemistry
How does heating or boiling a substance affect its pH?
Chemistry
You are given a jar containing a mixture of three different solid substances. The particles of each substance are larger than 0.5 cm in diameter. All you know about the substances is that each is a pure metal. Describe a method for determining the identities of the metals that...
chemistry
Diacetyl, a substance contributing to the characteristic flavor and aroma of butter, consists of 55.8% C, 7.03% H, and 37.17% O. In the gaseous state at 100 degrees celsius and 747 torr, a 0.30 gram sample occupies a volume of 111 ml. What is the molecular formula of diacetyl?
chemistry
see if on tlc silica if the polar solvent moves slowly then does even polar substances rf value is low? and the nonpolar rf is high?
Honors Chemistry
I don't exactly understand this question -- can someone maybe explain it to me please? 6) Suppose you have an NaOH solution of unknown concentration. Name three possible substances that could be used in "known" solutions to titrate the NaOH solutions.
CHEM
Select all cases where the substance shown has a molecular dipole. CH4 methane CH3CH2CH2CH3 butane ICl iodine chloride H2Se hydrogen selenide CH3CHO acetaldehyde CH3OCH2CH3 methylethylether None
cHEMISTRY
If a precipitation reaction occurs, when a solution of one substance is added to a solution of the other, enter the formula and state of the spectator ions. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. 3Zn(NO3)2(aq) + 2K3PO4(...
Chem
If a precipitation reaction occurs, when a solution of one substance is added to a solution of the other, enter the formula and state of the spectator ions. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. CoI2(aq) + Pb(NO3)2(aq)...
food preparation terms
to cause a dry substance or solid ingreient to pass into solution in a liquid
Dress making
which of the following is the most complete and accurate definition of fiber A: A stringy substance from plants. B: The hair of an animal. C: Man-made threads and yarns. D: Basic raw material from which fabric is made.
flagahan high
why can small cells exchange substances more readily than large cells?
Chemistry HELP ME!!!!
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(ag). When 45.00 mL of 4.8724 x 10 -1M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10 -1M NH4F solution, 1.524g o...
Chemistry 120
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(ag). When 45.00 mL of 4.8724 x 10 -1M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10 -1M NH4F solution, 1.524g o...
chemistry
Questions 7-9 refer to the following substances. (A) H2 (B) CH3OH (C) CH2Cl2 (D) KCl (E) Co 7. Is a solid at 25C and 1 atm 8. Is capable of hydrogen bonding 9. Its properties are governed by London(dispersion) forces.
chemistry
(c) some properties of the two compounds are listed below: compound X: compound Y: melting point -144C -138C boiling point 78C -22C net point Yes Yes functional group Alcohol Ether (i.) Draw plausible Lewis Structures of compounds X and Y. (ii.) In which compound are the inter...
Chemistry
Given C2H60; Some properties of the two compounds are listed below; Compound X: Melting Point Compound Y: -114C | -118C X: Boiling Point y: 78C | -22C X: Net Dipole? Y: Yes | Yes. X: Functional group Y: Alcohol | Ether. i. Draw plausible Lewis structure of compounds X and Y. i...
chemistry
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.
chemistry
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.
Chemistry
Write an equation to show the dissolving of the following substance in water. (NH4)2SO4(s) NH42SO4 + H2O -> 2NH4 + SO4 + H^+ + OH-?
physics
Calculate the net charge on a substance con- sisting of a combination of 6.5 × 1013 protons and 2.0 × 1013 electrons. Answer in units of C.
chemistry
what should I include in my discussion when writing up my heating substances lab experiment?
chemistry
1)gaseous sulfur trioxide and gaseous nitrogen monoxide form when gaseous sulfur dioxide and gaseous nitrogen dioxide react. 2)Enter the formula of the missing substance ( Y ) in the balanced equation below. Do not give the coefficient. C2H4 + 3Y → 2CO2 + 2H2O
physics
Calculate the net charge on a substance consisting of a combination of 6.0 1013 protons and 2.0 1013 electrons.
Pyshical Science
50g of a substance has a volume if 100cm3. What is the density of the substance?
chemistry
n-pentane and 1-butanol have nearly the same molecular weights but significantly different change in temperature values. explain the difference in change in temperature values of these substances based on their intermolecular forces.
chemistry
By means of what single reagent could you distinguish between the following? (Tell what happens to each substance.) Solutions: AgNO3 and Zn(NO3)2 H2SO4 and HNO3 Ag(NH3)2Cl and AgNO3 Solids: AgCl and ZnCl2 AgCl and Hg2Cl2 PbCrO4 and K2CrO4
Chemistry
Please help me Sketch a separation scheme showing how you would separate the following two component mixture: m-nitroaniline and hexanol. All the substances are soluble in ether. You can use any of the following solutions in your separation: aqueous hydrochloric acid, aqueous ...
Science
Explain why every substance has a characteristic density, but no substance has a characteristic mass.
Chemistry
Hey guys I did a lab and I have to answer the questions relating to the lab. I did question can someone please check if these are accurate 1. Calculation to Determine the molecular weight of unknown substance Mass of unknown used: 2.0232 g Mass of water used: 50.0 g (0.05kg) K...
Chemistry
You and another student were each given an unknown compound. Both samples contained colorless material. You each used the same brand of commercially prepared TLC plate and developed the plates using the same solvent. Each of you obtained a single spot of Rf=0.75. Were the two ...
chemistry
which pair of substances are most likely to obey Raoult's Law? C5H12 and C6H14 H3PO4 and H20 C4H9COOH and C5H12 C5H12 and H20 C4H9COOH and H20 How do I go about figuring this out? What should I be comparing, differences in molar masses, polarity, etc...?
Chemistry
how do i find which substances are most likely to obey raoult's law?
chem
Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room temperature, you find that it ha...
chem
a. One can use pH differences to separate basic substances from non-basic ones. Which of the following would be suitable for use in the aqueous phase to achieve the separation of phenol from naphthalene: K2HPO4, K3PO4, (CH3)3NHCl, (CH3)3N, NaHCO3, Na2CO3? Explain your answer. ...
Biology
a) What is a major structural advantage that eukaryotic cells have over prokaryotic cells? Why is this so important? My answer: The organelles in eukaryotic cells allow them to perform more complex functions than prokaryotic cells, which don't have these little organs. One...
organic chem
a. One can use pH differences to separate basic substances from non-basic ones. Which of the following would be suitable for use in the aqueous phase to achieve the separation of phenol from naphthalene: K2HPO4, K3PO4, (CH3)3NHCl, (CH3)3N, NaHCO3, Na2CO3? Explain your answer. ...
organic chem
Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room temperature, you find that it ha...
Chemistry
Does anyone know how to do this problem, i can't seem to solve it. If 39.25 g of a substance is dissolved in 155.5 g of benzene solvent, the freezing point of the solution is 0.08 oC. Calculate the apparent molar mass (g/mol) of substance.
Biology
b) Identify one similar and one different way each type of cell [prokaryote and eukaryote] uses flagella. My answer: In both prokaryotes and eukaryotes, flagella protrude from the cell's surface and enable movement. Prokaryotic flagella rotate, propelling the organism thro...
chemistry
If 1373 g of a substance is dissolved in 2315 g of cyclohexane solvent, the boiling point of the solution is 87.69 oC. Calculate the apparent molar mass (g/mol) of substance.
chemistry
If 1373 g of a substance is dissolved in 2315 g of cyclohexane solvent, the boiling point of the solution is 87.69 oC. Calculate the apparent molar mass (g/mol) of substance.
Chemistry
Which of the following surfaces does a true monolayer always form on? A. silicon B. gold C. both D. neither Why are silicon surfaces studied in this experiment? A. Silicon is shiny like the windows in tall buildings. B. Silicon more closely represents environmentally relevant...
Biology
Are these correct? Cohesion=Water molecules stick to the side of a straw because of this attractive force. Adhesion=Liquid mercury forms drops because of this attractive force Polarity=This property of water enables salt to dissolve in water Base=This is a substance that remov...
HSM210
I have re done my assignment . Can someone check to see if I have answered theses correctly ? Also, how would I start to answer to question at the bottom of the page ? This is very confusing to me. Scenario 1: Violence Prevention in a High-Risk Community Karyn, a social servic...
HSM210
Can someone please help me to start answering this question. I have been working on it since 6pm yesterday and it is now 3:50 am. I don't know where to begin . Also, did I match the sentences correctly with the correct type of prevention for the sentence ? Thank you, Analy...
chemistry
1.Vapor pressure is the pressure exerted by a vapor when condensation A. < B. = C. > evaporation over its liquid in a closed system. 2.Evaporation is an A. endothermic B. exothermic process, because when a substance evaporates it must A. absorb B. release energy to(from)...
nutrition
I am made from two substances that separately will kill. These same two substances combined will help preserve. What am I?
English 1
Can someone analyze this I have no idea what it means its from the poem substance, Shadow, and Spirit You had better go where fate leads. Drift on the stream of infinite flux Without joy, without fear: When you must go-then go And make a little fuss as you can.
biochem
When making Aspirin, I know that sulfuric acid is used as a catalyst. But i was wondering 1.) if the reaction would happen without the cataylst and 2.) can other substances be used as a cataylst in this reaction?
chemistry
Select all substances with an acceptor atom that can hydrogen bond to a hydrogen atom that is part of a polar covalent bond. I2 diiodine HI hydrogen iodide KrF4 krypton tetrafluoride O2 dioxygen C6H6 benzene HCl hydrogen chloride None
Chemistry
Identify all substances that can be classified as an atomic solid. SeF6 C2H4O2 H2C2O4 S8 Ru La2(SO4)3 None
Chemistry
Select all cases where the substance shown has a molecular dipole. CHF3 fluoroform H2NCH2CH2OH ethanolamine CF3CF3 hexafluoroethane CCl2CCl2 tetrachloroethylene (CH3)3N trimethylamine CHFCHF cis-1,2-difluoroethene None
Chemistry
Identify all substances that can be classified as a molecular solid. Rn Zn(BrO3)2 TlNO3 La C2F4 C2F6 None
Chemistry
Identify all substances that can be classified as a network solid. SiCl4 Zr Fe2(SO4)3 SiH4 Co(NO3)2 Y None
Biology
17. Functions of the nucleus include a. directing the function of the cell b. the partial assembly of ribosomes c. storing most of the hereditary information of the cell d. all of the above D? 18. Internal membrances play important roles in protien production and processing ex...
Biology
Can someone please check if my answers are correct? 17. Functions of the nucleus include a. directing the function of the cell b. the partial assembly of ribosomes c. storing most of the hereditary information of the cell d. all of the above D? 18. Internal membrances play imp...
Biology
Are these correct? A. harvests energy from organic compounds= mitochondria B. makes proteins in both types of cells= ribosomes C. uses light energy to make food= chloroplasts D. outer support for plant cells= cell wall E. gives shape and protection to animals= cell membrane F....
Chemistry
4 super tough chemistry questions: 1.) Water has a considerably higher boiling point and lower vapor pressure than other molecules of similar or larger molar mass. For example, dinitrogen (N2), methane (CH4), etc. all have lower boiling points and higher vapor pressures than w...
Biology
17. Functions of the nucleus include a. directing the function of the cell b. the partial assembly of ribosomes c. storing most of the hereditary information of the cell d. all of the above D? 18. Internal membrances play important roles in protien production and processing e...
Biology
17. Functions of the nucleus include a. directing the function of the cell b. the partial assembly of ribosomes c. storing most of the hereditary information of the cell d. all of the above D? 18. Internal membrances play important roles in protien production and processing ex...
chemistry
1)If 746.4 g of a substance is dissolved in 1723 g of benzene solvent, the freezing point of the solution is -9.19 oC. Calculate the apparent molar mass (g/mol) of substance. 2) What mass ( g ) of the solvent water should be mixed with 0.008595 L of the solute ethylene glycol ...
Chemistry
Describe the effect on the concentration of the bold substance by the following change: decrease the volume The equilibrium is: 2HF(g) <--> F2(g) + H2; change in H=536KJ F2(g) is bolded. Shouldn't F2(g) increase when voume is decreased? Why is there no change? Thanks...
chemistry
Calculate Ke for the following(equilibrium concentrations given below substances) NH4SH(g) yields NH3(g) + H2S(g) + heat [.027] [.0234] [.209] Thank you!
chemistry
calculate Ke for the following (equilibrium concentrations given below substances) N2O4(g)+heat yields 2NO2(g) [.0325] [.022] Thank you!
chemistry
Calculate Ke for the following (equilibrium concentrations given below substances) H2(g)+Br2(g) yields 2HBr(g) + heat[.513] [.62] [.346] Thank you!
chemistry
Select all cases where the substance shown has a molecular dipole? (HO)2SO2 sulfuric acid CH3CF3 1,1,1-trifluoroethane C4H8 cyclobutane OF2 oxygen difluoride CH3CH2CO2H propionic acid i know OF2 dont have dipole.
Chemistry
The density of copper is listed as 8.94 g/cm to the third. Two students each make three density determinations of samples of the substance. Student A's results are 7.3 g/mL, 9.4 g/mL, and 8.3 g/mL. Student B's results are 8.4 g/cm to the third, 8.8 g/cm to the third, a...
English
1)When passing through the woods, we must pause to see the squirrels busy (in?) hiding their nuts in the grass 2) "No time to turn at Beauty's glance, and watch her feet, how they can dance (Is the rephrase correct? We have no time to see the beautiful glance of a mai...
physics
Calculate the net charge on a substance consisting of a combination of 6.8 multiplied by 1013 protons and 4.6 multiplied by 1013 electrons.
Chemistry
what is the density of an unknown substance whose mass is 4.5 grams and volume is 5 mil?
chemistry
Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g)...
OCHEM
When 2-methyl-2-butene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has been formed?
chemistyr
Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2(g) + heat =NO (g) + O3(g) (NO IS ...
O chem
When 2-methyl-2-butene is bubbled into dilute sulfuric acid at room temperature, it appears to dissolve. What new substance has been formed?
Science/biology
1) How does alanine differ from glycine? 2) Protein shape can be changed by heat. Egg white is rich in the protein albumin. What happens to egg white when an egg is cooked, and why? 3) Is the shortage of tyrosine the cause of albinism? Explain. 4)Through recumbinant DNA techni...
chemistry
Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g)...
chemistry
I have the 1st part of the answer to my question I guess what I don't understand is the 2nd part of the question. I am supposed to 1. predict how ke increases in temperature, 2. predict how equilibrium will shift when pressure is decreased and 3. predict how equilibrium wi...
chemistry
which isn't a pure substance? 1.Cl2(g) 2.Fe(s) 3.O2(aq) 4.C6H12O6(b) 5.H2O(l)
chemistry
A solution containing silver (I) ion (an oxidizing agent) is mixed with a solution containing iron (II) ion (a reducing agent). a. What is the balanced equation? b. If the contents of the reaction mixture described above are filtered, what substances, if any, would remain on t...
chemistry
A solution containing silver (I) ion (an oxidizing agent) is mixed with a solution containing iron (II) ion (a reducing agent). a. What is the balanced equation? b. If the contents of the reaction mixture described above are filtered, what substances, if any, would remain on t...
chemistry
1. The mass spectrum can be observed for all forms: pos. ion, neg.ion, molecules, and atoms, can't it? 2. Is there a formular to calculate how many spectrum of the substances we need to observe? Please give me some examples, and calculation. 3. I knew the examples of H2S+,...
chemistry
in making a solution of an unknown solid substance to test it for the presence of ions, would it matter if you used pure water or tap water to make the solution
math
i have this question and im not sure how to do it i keep getting stuck with these types of questions and i would appreciate some help (a) The rate of decay of a radioactive substance, S, is proportional to the amount remaining, x. Given that x = a at time t = 0, show that, if ...
Health Psychology Committee Report
Assign one or more of the items in the bulleted duty list below to each of these four job titles: substance abuse counselor; inpatient-only psychologist; child psychologist; adult psychologis. Specify duties for five hospital-associated psychologists that reflect health psycho...
chemistry
a student named KClO3 potssium chlorine(V) oxide. Explain why the use of the stock system is not correct in this case, and write the correct name of the substance.
chemistry
simply by knowing the mass of an object and its chemical identity, one can determine the number of moles of any substance(S). without using any numbers (only units), write a general equation which will convert grams of "S" to moles of "S".
algebra
Part 1: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents. Find the pH of an acidic substance of your choice. Using this pH, show how to find the hydroge...
chem- to clarify....
"How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative proportions of the com...
chemistry
im confused about ionic substances. can someone give me a example of ionic substances?
chem
How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative proportions of the component...
algebra
Part 1: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents. Find the pH of an acidic substance of your choice. Using this pH, show how to find the hydroge...
chemistry
explain why the type of bond could determine the volatility of a substance
science
a___ is the change of one or more substances into other substances
Lattice Energy
Arrange the following substances in order of decreasing magnitude of lattice energy. KCl NaF SrO BaO
biology
You have isolated the genome from a novel virus and would like to determine its composition. you have three tubes, each containing one of these substance: 1. a protein that degrades double stranded DNA (DNase, tube 1) 2. a protein that degrades single stranded RNA (RNase, tube...
AP Physics
A student found an unknown substance. In an effort to identify the thermal properties of the substance, she isolated a specimen of 47 gram, and applied 290 J of heat energy to the specimen. If she measured the temperature of the specimen changed from 20 ° C to 25.7 ° C...
biology
what substance enters the food chain through photosynthessis
fibers and fabrics
Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber is A. nylon. B. Dacron....
Metaphysics
hi can anyone help me with this paper? this is the basis of the paper I. Statement of Aristotle’s Metaphysical Proposal A. Aristotle’s argument in favor an Absolute Being B. Nature of Aristotle’s Absolute C. The relation of his Absolute to the realm of material ...
Advance Biology
I have to find the correct term that best fits each definition. 1)The "transforming factor" that alters pneumonia bacteria 2)The three parts of every nucleotide 3)A pair of these forms a "rung" in the DNA ladder 4)Used to "label" DNA and protein i...
Chemistry
The densities of gases A, B, and C at STP are 1.25g/L, 2.87 g/L, and .714 g/L. Calculate the molar mass of each substance. Indentify each substance as ammonia, sulfur dioxide, chlorine, nitrogen, or methane.
science
1)Compare the properties of metals nonmetals and metolliods? 2)Why can elements and compound be considered pure substance? 3)What is the difference between colloids and suspension?
science
1)Compare the properties of metals nonmetals and metolliods? 2)Why can elements and compound be considered pure substance? 3)What is the difference between colloids and suspension?
science
1)Compare the properties of metals nonmetals and metolliods? 2)Why can elements and compound be considered pure substance? 3)What is the difference between colloids and suspension?
science
what is a substance that provides nourishment to an organism
Org. Chem.
A natural product (MW=150) distills with steam at a boiling temperature of 99 degrees Celsius at atmospheric pressure. The vapor pressure of water at 99 degrees Celsius is 733 mm Hg. A) Calculate the weight of the natural product that codistills with each gram of water at 99 d...
Org. Chem. Please Help
A natural product (MW=150) distills with steam at a boiling temperature of 99 degrees Celsius at atmospheric pressure. The vapor pressure of water at 99 degrees Celsius is 733 mm Hg. A) Calculate the weight of the natural product that codistills with each gram of water at 99 d...
Chemistry
Are the melting point and freezing point of a substance represented by the same number?
math
an extremely volatile substance, Ofnetite, has a half-life of 25 minutes. Find the percentage decrease of this substance in the first two hours.
Calc
A sample of a radioactive substance decayed to 93.5% of its original amount after a year. a) What is the half-life of the substance? ? years (b) How long would it take the sample to decay to 10% of its original amount? ? years
COM/220
Below the instructions and the script are my responses. could someone take a look and see if they seem so be correct? Write a minimum 500-word response to the following: 1. Identify and explain at least 2 specific examples of bias in the speech. 2. Identify and explain at leas...
COM/220
Below are my responses. could someone take a look and see if they seem so be correct? Write a minimum 500-word response to the following: 1. Identify and explain at least 2 specific examples of bias in the speech. 2. Identify and explain at least 2 specific examples of fallaci...
COM/220
Below are my responses. could someone take a look and see if they seem so be correct? Write a minimum 500-word response to the following: 1. Identify and explain at least 2 specific examples of bias in the speech. 2. Identify and explain at least 2 specific examples of fallaci...
Biology
In what kind of food is each of the following substances found: a)lactose b)sucrose c)cellulose d)sunflower oil e)liquid protein.
chem
. Give two reasons why graphite (carbon) electrodes are used in electrolysis. 5. You have 2 compounds called X and Y. X melts at 1200 degrees C and is soluble in water. Y melts at 156 degrees C and is insoluble in water. Draw 2 diagrams to show how you could prove which of the...
chemistry
4. Give two reasons why graphite (carbon) electrodes are used in electrolysis. 5. You have 2 compounds called X and Y. X melts at 1200 degrees C and is soluble in water. Y melts at 156 degrees C and is insoluble in water. Draw 2 diagrams to show how you could prove which of th...
chemistry
How would you find the empirical formula for this... a substance was found by analysis to contain 20% by mass calcium and 80% by mass bromine. Would it be CaBr2? This is what I did... 20g Ca * 20 mol Ca/801.56g Ca = .499 mol Ca 80g Br * 80 mol Br/6392.32g Br = 1.001 mol Br 1.0...
chemistry
How would you find the empirical formula for this... a substance was found by analysis to contain 20% by mass calcium and 80% by mass bromine. Would it be CaBr2? This is what I did... 50g Ca * 20 mol Ca/801.56g Ca = .499 mol Ca 80g Br * 80 mol Br/6392.32g Br = 1.001 mol Br 1.0...
chemistry
How would you find the empirical formula for this... a substance was found by analysis to contain 20% by mass calcium and 80% by mass bromine.
AP 9th grade-Philosophy
In order to prove this thesis by the Greek Thales, "All substances can be reduced to water." what would i have to do?! im clueless...
biology
substances that can pass through cell membranes by diffusion include?
Chemistry
Calcium nitrate and ammoonium fluoride react to form calcium fluoride, dinitrogenmonoxide and water vapor. What mass of each substance is present after 28.42 g of calcium nitrate and 29.60 g of ammonium fluoride react completely?
chem
DrBob222, thank you for answering my question(s). Sorry for asking repeatedly, I am new to this "posting" stuff. I thought I was asking different persons. Let me rephrase my question. How do I determine which roman numeral to place between the cation and the anion of...
chem
how do you know which roman numeral to place between the cation and the anion of a metal-nonmetal substance?
chem
how do you know which roman numeral to place between the cation and the anion of a metal/non-metal substance?
chemistry
how do you know which roman numeral to put between the cation and anion of a metal and non-metal substance?
chemistry
how do you know which roman numeral to put between the cation and the anion of a metal-nonmetal substance?
chemistry
how do you know what/which roman numeral to place between the cation and the anion of metal-nonmetal substances?
Science
Mass= 48g; volume=24 cm3 . What is the density of this substance ?
chemistry
2. Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring both beakers, there ...
Chemistry/maths
What mass of substance would be needed to prepare these solutions: 1) 400ml (cm3) at 5% weight/volume 2) 50ml (cm3) of NAOH at 10% weight/volume thanks
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