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Recent Homework Questions About Substance Abuse
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chemistry
The molecular mass of a substance was determined by the freezing point depression technique. The minimum data required for the determination are a. delta Tf and Kf only. b. delta Tf , Kf and mass of solute. c. delta Tf , Kf , mass of solute and mass of solvent. d. delta Tf , ...
Math
To have a constant concentration of .25 ppm of a substance with 18,000gal/water flowing, how much would I need to add per minute? Does that make any sense? How would I go about answering that? I don't want the answer, but maybe just a push in the right direction because I ...
chem grade 12
Consider the following substance: Al2(SO4)3 What is the oxidation number of: a) aluminum b) sulfur c)oxygen
Chemistry
A certain substance has a heat of vaporization of 34.65 kj/mol. At what kelvin temperature will the vapor pressure be 3.50 times higher than it was at 331 k?
physics
1. Calculate the radius of orbit for a hydrogen electron in the n=3 level. 2.The half life of an unknown substance is one minutes. If the initial number of particles is 20 how many particles will remain after two minutes have elapsed?
chemistry
A certain substance has a heat vaporization of 47.97 kJ/mol. At what Kelvin temperature will the vapor pressure be 7.50 times higher than it was at 297K? Please help me! I don't understand heat vaporization questions
physics
What is anionic bond?what type of substance.form ionic bond?
physics
What is a covalent bond?what type of substance form covalent bonds?
chemistry
As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered? a.Liquid, solid, gas b.Gas, solid, liquid c.Solid, liquid, gas d.Gas, liquid, ...
chemistry
As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?
science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ...
Physics
What happens to the internal energy of an ideal gas when it is heated from 0C to 4C? a. increases b. decreases c. change in number of atoms d. increase in volume of substance
Chemistry Problem - hard :<
Man in the vat problem. Long ago, a workman at a dye factory fell into a vat containing a hot concentrated mixture of sulfuric and nitric acids. He dissolved completely! Because nobody witnessed the accident, it was necessary to prove that he fell in so that the man’s ...
College Chem
A 2.446-g sample thought to contain only one volatile substance, MgCO3, was heated in a nitrogen atmosphere for 30 min. After cooling, the residue weighed 2.216 g. Calculate the percentage of magnesium carbonate in the sample.
Chemistry
1) Consider the following substance: V3N5. What is the oxidation number of vanadium and nitrogen? 2) Consider the following substance: Mn2O7. What is the oxadation number of manganese and oxygen? 3) Consider the following reaction: Al2(SO4)3. What is the oxidation number of ...
Chemistry
Why dencity classfied in intensive propertie s? dencity is not depend on amount of substance? Please help us
physics
a cube of side L is made of a substance that is 1/4 as dense as water. WHen placed in a calm water bath the cube will a) float with 1/2 L abovethe surface b)sink to the bottom, c) float with 1/4 L above the surface d) float with 1/4 L below the surface e) float with 3&...
Chemistry
If the density of a substance is 15.2 g/mL, what is the density in cg/kl?
math
for each pair of substances, circle the substance with more thermal energy and explain why? A0 500g of water at 35 degree C VS. 500 g of water at 85 degree C B) 500 g of water at 35 degree C VS. 250 g of water at 35 degree C
Chemistry
Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed ...
PHYSICAL SCIENCE QUESTION! PLEASE HELP!
A 68.4-g sample of potassium chloride was added to 200.0 g of water at 20 ºC. Is the solution saturated, unsaturated, or supersaturated? Use the graph to help answer the question Substance Solubility Substance Solubili Barium- Hydroxide 3.89 Potassium- Chloride 34.2 ...
Calculus
Write a differential equation to model the situation given. Do not solve. The radioactive substance neptunium-139 decays to 73.36% of its orginal amount after 24 hours. How long would it take for 43% of the original neptunium to be present? What is the half-life of neptunium-139?
chemistry
The vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are solutions of water and ...
chemistry
a solid substance has a density of 4.36 g/ml. what is the volume of 30 g of this substance?
chemistry
A solution was made by dissolving 10.0g of a nonvolatile nonelectrolyte compound in 100.0g of water froze at -0.93C. What is the approximate molecular weight of the substance. (for water..kf=1.86C/m) (m is molality)
Physics
Two bars of identical mass are at 34 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/(kg · C°). When identical amounts of heat are supplied to each, the glass bar reaches a temperature of 97 °C, ...
Alg2
Radioactive iodine is used to determine the health of the thyroid gland. It decays according to the equation y=ae -0.0856t where t is in days. Find the half-life of this substance. Round to the tenths place.
Chemistry
Reposting with correct information..Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in...
Physics
A copper calorimetric cup with a mass of 100g contains 96g of water at 13 C. If 70g of a substance at 84 C is dropped into the cup, the temperature increases to 20 C. Find the specific heat capacity of the substance
Physics
When 2.1x10^3 J of heat is added to 100.g of a substance, its temperature increases from 15 C to 40 C. What is the specific heat capacity of the substance? Answer is 8.4x10^2 but I need to see the work involved in how to solve the problem
Alg2
Radioactive iodine is used to determine the health of the thyroid gland. It decays according to the equation y=ae -0.0856t where t is in days. Find the half-life of this substance. Round to the tenths place.
chemistry
A particular radioactive substance has a half-life of 4 minutes. How long will it take for 250 g of this radioactive material to decay to less than 0.1g? 24 min 36 min 40 min 48 min 72 min I got 32 min but that not one of the choices. Please help
chemistry
Consider a liquid at 90 bar and 40 °C. What is the change in entropy of the substance as you change the conditions to 1 bar and 150 °C by expanding the liquid while heating? Vapor pressure = 59.2 bar heat of vaporization = 1.82 kJ/mol , both at 150 degree C Heat ...
Chemisrty
Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed ...
Calculus
A certain magical substance that is used to make solid magical spheres costs per cubic foot. The power of a magical sphere depends on its surface area, and a magical sphere can be sold for per square foot of surface area. If you are manufacturing such a sphere, what size ...
Chemistry
the corrosion of iron is similar to the reactions that occur in an electrochemical cell. Oxidation and reduction occur at separate places on the metal and the circuit is completed by an electrolyte in solution one possible corrosion is Fe(s)+O2(g) + H2O(l) --> Fe^2+(aq) + ...
phiscal science semester 2
For the reaction C2H6+O2>CO2+H2O what are the coefficient to the chemical substance it goes with for balanced reactions?
Question
If I join these clubs in high school will I make it to Ivy League Schools Computer Club Any student interested in computers will learn skills such as creating web designs and building PCs. Students will also have the opportunity to learn advanced techniques using computer ...
science HElp
Ph scale Which on is true A substance with ph is twice as acidic as substance with ph of 4. A subtances with ph 3 is 10 as acidic as substance with ph of 4. A substance with ph 3 twice as alkies as substances with ph 4. a substancs with ph 3 10 time alkies as substance with ph...
Chemictry
A calorimeter contains 32.0 of water at 11.5. When 1.70 of (a substance with a molar mass of 74.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 26.5. Calculate the enthalpy change, , for this reaction per mole of . Assume that the ...
Chem
How would one balance the following redox reaction using the half reaction method? Fe(OH)2 + O2 + H2O ---> Fe(OH)3 This is in my chemistry teacher's homework, and it comes up with an answer, but I don't see how to use the half reaction method when there is only one ...
psychology
# 1.1 (1 pts.) Roger is experiencing a memory loss that may be related to recently contracting herpes. Which of the following diagnoses would best fit his condition? A) dissociative amnesia B) retrograde amnesia C) amnestic disorder due to a general medical condition D) ...
chem
Is there any simple way to predict the volume of a second back titration done on a particular antacid substance after completing a titration the first time around?..Thank you every one for responses.
chemestry
A calorimeter contains 16.0 of water at 15.0. When 1.60 of (a substance with a molar mass of 58.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5. Calculate the enthalpy change, , for this reaction per mole of . Assume that the ...
advanced math
What is the half life of a substance if it decays by 75% in two weeks?
Chemistry
Substance A has a normal fusion point of ‑10.0 oC, an enthalpy of fusion = 150.0 J g^-1; specific heats for the solid and the liquid are 3.00 and 6.20 J g^-1 oC^-1, respectively. How much heat, in J, is required to change 150 grams of A from a solid at –40.0 oC to a...
basic chemistry
a substance that cannot be broken down into susbtances by ordinary chemical means is
health
9. Human blood, which has a pH of approximately 7.4, is a/an _______ substance.
SUBSTANCE ABUSE COUNSELOR
SOMEONE WHO'S TAKING PENNFOSTER SUBSTANCE ABUSE COUNSELOR
physical science
A certain radioactive substance has a half-life of 1 hour. If you start with 1 gram of the material at noon, how much will be left at 3:00 P.M.? At 6:00 P.M.? At 10:00 P.M.?
BioChem
If you want to determine the actual salicylate concentration for a sample that gives you a darker color than the highest standard, you would need to make a dilution of it. If you dilute it by mixing .25 mL of sample with .75 mL of water and then find that this mixture has a ...
Science
Study the data table below. A three-column table presenting the 'Melting Point and Boiling Point for Common Substances.' The column headers are 'Substance,' 'Melting point (°C),' and 'Boiling point (°C).' For substance aluminum, the ...
English
Can you help me write an essay of 450 words on the topic " Substance Abuse in schools"
Chemistry
If 0.274 moles of a substance weighs 62.5g, what is the molar mass of the substance? 62.5/0.274 = 228.1 Am I on the right track?
Pre Calculus
Exponential growth and decay find the half life of a radioactive substance if 220 grams of the substance decays to 200 grams in 4 years?
Chemistry 10
The accelerator pedal in the car is pressed, resulting in a faster consumption of fuel in the engine. Now according to previous answers to this question the answers concentration but I do not understand how. I though concentration is the amount of a substance dissolved in a ...
Pre Calculus
Exponential Growth and Decay Find the half-life of a radioactive substance that decays by 5% in 9 years.
Algebra
An isotope of Glopenium disintegrates according to the formula A(t) = Ao2^-0.0345t where Ao is the initial mass of the substance and t is the time in years. If there are 2 milligrams of Glopenium now, find the number of milligrams that will be left after 35 years. Your answer ...
Biology
You are supposed to add 0.1 mol of a substance with molecular weight = 354.9 to 1 liter of water. How much should you add? Choose one.
chemistry 110
in regards to conductivityhow is a substance/solute classified as strong, weak or nonelectrolyte
science
A substance seems to completely fill a container, but more can best forced in. The substance is a__________. A. solid B. gas C. liquid D. none of these
Math/Calculus
After 5 days, a particular radioactive substance decays to 37% of its original amount. Find the half life of this substance. Is this right? Th= ln 2/ln(1/.37) x 5 days
Analytical Chemistry
Calculate the number of grams needed to be dissolved and diluted to 100 ml to prepare 0.200M solution for the following substance BaCrO4. huh?
Chemistry
In one experiment, the mass of water is 92.6 grams, the initial temperature of the water is 67.6oC, the mass of liquid nitrogen added to the water is 61.4 grams, and the final temperature of the water, after the liquid nitrogen has vaporized, is 35.6oC. Specific heat of water...
Chemistry (PLEASE HELP ME)
1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed horizontally to the S-L or L-G...
Chem
1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed horizontally to the S-L or L-G ...
science
How is the temperature of a substance related to the energy of movement of the particles in the substance?
chmistry
what substance has the density of .60g/ml
chemistry
A solid substance P is soluble in water (1g/ 100mL) at 25°C and 10g/ 100mL of water at 100°C. You are given a sample that contains 10g of P and 2g of impurity G. Describe the procedure to purify P if G is insoluble in water.
chemistry
A solid substance P is soluble in water (1g/100 mL) at 25 degrees and 10g/100mL of water at 100 degrees. You are given a sample that contains 10 g of P and 2g of impurity G. If G has the same solubility as P, describe how you could purify P.
Identify Topic Sentence
Read each of the following paragraph and underline the topic sentence. Many plant foods naturally contains toxins in small amounts, so through they're generally safe to eat, consuming them in very large amounts could be harmful. Potatoes that have been exposed to light ...
Identify Topic Sentence
Read each of the following paragraph and underline the topic sentence. Many plant foods naturally contains toxins in small amounts, so through they're generally safe to eat, consuming them in very large amounts could be harmful. Potatoes that have been exposed to light ...
156
is this a strong thesis statement? Legalizing marijuana has many benefits such as, reducing overcrowding in prisons, helping create jobs for low to mid income individuals, reduce the budget for ”the war on drugs” and can treat different medical problems. Legalizing ...
Organic Chemistry
What are the advantages of using a solvent pair for recrystallization? Select all that apply. A) You can control the solubility of the substance in the mixed solvent. B) You don't have to know the exact amounts of the solvents needed. C) You can quickly make the solution ...
alcohol counselor
Select one core function you have learned about so far and describe at least three global criteria. Explain why you believe these criteria are important elements in the substance abuse counseling process.
science
if you filled a 150ml container w/100ml of substance and the substance quietly filled the container what would it be
physical science
give one word/term for each of the following descriptions. 1.A substance that donates electrons in chemical reaction. 2.The formula showing the simplest whole number ratio in which the atoms combine to form a compound.
science
a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.
Chemistry
1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of solvent.(My answer) 2. ...
chemistry
10.0mL of a pure liquid substance has a mass of 25.0 g. What is the mass of 3.00 L of the substance?
Physical Science
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3. However, the different individual atoms that make up the substance have very different melting temperatures and densities. The unknown substance is most likely a ...
chemistry
Try to balance the following reactions by inspection. In each reaction, identify the substance reduced and the substance oxidized. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) (a) CH4(g) + S(s) ¨ CS2(l) + H2S(g)
Chemistry
1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of solvent. 2. In ...
Chemistry
Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5 carbon atoms and 12 hydrogen atoms and (c) provide the common name for each of the isomers
chemistry
Calculate the grams of substance required to prepare 250mL of 5%(wt/vol) NaNO3
chemistry
Substance A has a specific heat of .650J/gK and substance B has a specific heat of .325J/gK. If 100 J of energy is applied to a 10 g sample of each substance, which will have a higher temperature?
chemistry
Substance A has a specific heat of .650J/gK and substance B has a specific heat of .325J/gK. If 100 J of energy is applied to a 10 g sample of each substance, which will have a higher temperature?
physical science
which of the following statements correctly describes the substance with the formula KI?
CRT 205
Can someone review this and let me know if it is acceptable?? This class was so hard and it has been all i can do to pass it! Here is the article i chose Addiction Is a Choice, Not a Disease Addiction , 2009 Content Level = Intermediate Dale Netherton, "It's Not ...
chemistry
B. Everyone knows that water is supposed to boil at 100° C. Why did your water sample boil at a different temperature? C. While heating two different samples of water at sealevel, one boils at 102o C and one boils at 99.2o C. Calculate the percent error for each from the ...
chem
The primary substance from which all other chemical compounds and substances are made is a____________. A) element B) compound C) mixture D) pure substance
science
The primary substance from which all other chemical compounds and substances are made is a____________. A) element B) compound C) mixture D) pure substance
chemistry
The primary substance from which all other chemical compounds and substances are made is a____________. A) element B) compound C) mixture D) pure substance
biochemistry
Reaction A B proceeds with H = 240 kJ×mol-1; S = 40 J×K-1×mol-1. Substance A was taken at initial concentration 2 mM. Determine the concentrations of A and B after the reaction reaches equilibrium at 298 K.
chemistry
how do you calculate density of a substance with a mass of 100g and a volume of 48ml
substance
Has anyone read the book begging for change by Robert Eggert. I am having a hard time analyzing chapter two and three. Can you please help me.
chemistry
If you have 12 moles of a substance, how many molecules do you have of that substance? Suppose the substance has a molecular weight of 342. How many grams of that substance would you have to dissolve in a liter of water to make a 12 M solution?
chemistry
it is the rest of my question B. is this reaction exothermic or endothermic? C. what is the oxidizing agent in this reaction D. in corrosion reactions the oxidizing agent actually removes electrons from the oxidized substance . are electrons actually removed in combustion?explain
science
give an example from everyday life that shows that the atmosphere has substance.
Chemistry
Can somebody check my answers? I Failed this test one time already. I do not want to fail it again. 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed. Most often, the pair is formed A. by excess valence electrons. B. as one atom ...
chemistry
The mass of the elements iron and oxygen in four samples of a rust-colored substance was measured in grams. Do you think all four samples are the same compound explain.
chemistry
The chemical substance in natural gas is a compound called methane. Its molecules are composed of carbon and hydrogen and each molecule contains four atoms of hydrogen and one atom of carbon. In this compound, 0.33597g of hydrogen is combined with 1g of C12. Use this ...
chemistry
1) to the nearest gram, what is the molar mass of Al2O3? 2)Br+H3O->HBr+H2O when this reaction is reversed what substance acts as an acid? what substance acts as a base ?
Chemistry
a 40-year-old manger at a prominent legal firm in L.A experiences abdominal pain post lunch. He goes to the restroom a couple of times, but continues to experience pain and cramps. He evevtually decides to get himself examined. While questioning him, you learn that he consumed...
Math
If the addition of 2,000 joules of heat to 10 kilograms of a substance raises it's temperature 2 degrees,the specific heat of the substance is. a. 0.01j/kg degrees. b. 0.2j/kg degrees. c. 50 j/kg degrees d. 100 j/kg degrees e. 200j j/kg degrees
Chemistry - please help
A substance was tested for Impurity A using liquid chromatography. 2 determinations were performed. In the 1st chromatogram, Impurity A was not detected, i.e. no Impurity A peak was observed and in the 2nd chromatogram, Impurity A peak was observed with a value of 0.3%. Is it ...
Statistics
Each year, approximately 160 colleges compete in the National Concrete Canoe Competition. Each team must design a seaworthy canoe froma a substance not known for its capacity to float. The canoes must weigh between 100 and 350 pounds. Find the midrange.
Chemistry
What is the approximate boiling point of the substance represented by the complete heating curve below?
science
calculate the density of a liquid if 150g of a substance with 188mL volume
chemistry
1.If its molar solubility is designated by “x”, then which of the following expressions best represents the solubility product for the substance Ag2SO4? a) x2 b) 27x4 c) 4x3 d) 108x5 e) 3x4 2. Consider the equilibrium, 4HCl(g) + O2(g) 2H2O(g) + 2Cl2(g). The ...
chemistry
1. A solution of sodium oxalate has a pH of 7.82. The [OH-] in mol/L must be which of the following: a) 6.18 b) 1.5 x 10-8 c) 6.6 x 10-7 d) 7.82 e) -7.82 2. When 0.93 mol of O2 and 0.56 mol of NH3 are mixed together and allowed to come to equilibrium according to the equation...
Medical Terminology
Need help identifying 15 medical terms that would be unfamiliar to non-medical persons. Also providing singular and plural forms of selected medical terms. This is a 47-year-old male who was in his usual state of health until early this evening when he developed an acute ...
phiisical science
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3.
A/P Chem
A student wants to make a 5.00% solution of potassium chloride using .0377 g of the substance.What mass of water will be needed to make the solution?
Pre Cal
a radio actice substance decays so that half of the substance decays every 2 minutes. if 100 g of the substance are present initially, how many grams will be present after 4 minutes and 8 minutes respectively?
Chem
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 – Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed...
physics
A piece of metal has a density of 0.20g/cm^3.what is the volume in cm^3 of a 1g sample of a substance?
English
Could someone review this essay for me? It is a rough draft of my persuasive essay. The Reality of Credit Cards and College Students Laurie A Johnson COM 156 Diana Bernste The Reality of Credit Cards and College Students Why do companies target a portion of the population that...
child psychology
Is this a good example of cognitive perspectiive and do you have anything that you can add on to this to give more substance. The cognitive learning process involves thought processes and the behaviors that these thoughts cause. The best example that I can think of is the ...
chemistry
what is the substance in a solution that gets dissolved
chemistry
I have a unit cube question to which the answer is given that I'm trying to figure out. The question is: If under conditions of high pressure & temperature, the crystalline structure rearranges to form a face-centered cubic unit cell, what is the new density of the ...
Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? I need help in setting the problem: I got 56.21/8.3145j/mol.k(1/T1-1/T2)?
Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
Chemistry
A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? Thank you
physical science
For each pair of substances, which of the substance with more thermal energy and explain why. a.500 g of water at 35„aC vs. 500 g of water at 85„aC b.500 g of water at 35„aC vs. 250 g of water at 35„aC I dont know how to determine the answer
hsm210
Scenario 3: Caring for the HomelessYou are a case manager in a community mental health center. Many of your clients are homeless and have either mental disorders or substance abuse and health problems. Health problems among the homeless are exacerbated by their homeless status...
chemistry
Which of the following pairs of molecules have the same oxidation number for carbon? CO and CO2 CH4 and CCl4 C6H12O6 and C(s) H2CO and COCl2 Carbon always has an oxidation number of +4 What mass of CuSO4.5H2O would you need to prepare 250.0 mL of a 0.250 M solution? [MW of ...
Science
Part 1 Which of the following is a redox reaction? a. H2CO3 (aq) + 2NH3 (aq) → 2NH4+ (aq) + CO32- (aq) b. 2VO3- (aq) + Zn (s) + 8H+ (aq) → 2VO2+ (aq) + Zn2+ (aq) + 4H2O (l) d. Zn(NO) (aq) + 2NaOH (aq) → Zn(OH) (s) + 2NaNO (aq) part 2 For the redox reaction in...
Homework Help ME! Science
In the reaction mechanism below, indicate what substance is acting like a catalyst. Step 1: H2O2 (aq) + I- (aq) → H2O (l) + IO- (aq) Step 2: H2O2 (aq) + IO- (aq) → H2O (l) + I- (aq) Is the catalyst in the problem above a heterogeneous or a homogeneous catalyst?
English
During the afternoon, my cats are content to nap on the couch.What is the meaning of these sentence? Content is the meaning of "the amount of a substance that something contains".Is it right?But I don't understand meaning of word "content" in these ...
science
name the water soluble substance witch added with delute hcl and produce gas tarn lime water milky?
s.d
name the substance witch is insoluble in water is added to dilute hydrochloric acid a colourless gas is evolved?
Health Psychology
I want to make it clear that I do not want any answers to the project I am about to post on here. I only need help understanding it a little. I am trying to get online to speak with my professor but our school site is down at the moment. I think I know what I am doing, I just...
chemistry
What is the approximate boiling point of the substance represented by the complete heating curve below? (2 points) A) 30°C B) 40°C C) 50°C D) 100°C
Life orientation
Ways in which you critically discuss how substance abuse disease impact on the teenager
History.. Revisions made
Is morality is a Social Function (Construction)? This would imply that there is no such thing as REAL morality only the morality that society forces us to follow (both consciously and unconsciously). Use examples to explain your case. [ WARNING: If you do agree with this ...
Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
Chemistry
Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...
chemistry
Substance A and substance B react to form substance C as described by the equation: A + B ↔ C If only substance A and substance B are placed in an enclosed vessel and allowed to react what would the reaction be?
Chemistry
In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH
chemistry
calculate the molar concentration of substance in a solution containing 5,85g of Nacl2 in 200cm cube solution
science
what entropy changes occur whin a substance melts?
med term
In theses 2 scenarios im suppose to find 15 med words and define them, now I have found more then 15 am I correct that there is more then 15? Dont want to know what they are just want to know that there is more then 15 I. AMBULATORY CARE FACE SHEET Admit Date: 7/8/20XX @ 20:22...
physics
A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance? Specific Heats of Selected Substances ______________________________________ Substance C [J/(kg•K)] Water (ice-)2,060 Iron-450 Aluminum-897 Gold- 130 ...
TEACHER AIDES
16. Which of the following sets of factors is most influential in contributing to violence? A. Child abuse and poor nutrition B. Persistent poverty and poor nutrition C. Media violence and poor-quality schools D. Persistent poverty and widespread substance abuse . I think its D.
Health
What are the short term effects of Cocaine: When someone consumes this substance what effect will it have on their body, mind, and behavior? Please answer ASAP I really need the answer... and please don't give the website for me to find the info, I don't have enough ...
life orientation
substance abuse in (10-15)lines critically discuss 5 ways in which the human or environmental problem impact on the community?
Life Orientation
Institutions/community organizations that are involved in supporting or giving redress to substance abuse.
substance
How alcoholism is a human factor that may cause ill health ,accidents,crises or disasters
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