Monday
February 8, 2016

Homework Help: Health: Substance Abuse

Recent Homework Questions About Substance Abuse

Math
I need help in algebra 1. I have 4 questions, I already answered 3 of them, but I need help with the other Andrew measures the amount of a very unstable substance to be 100 moles. The half-life of this substance is 3 days (after 3 days, half is gone). 1. Write an exponential ...
Monday, February 8, 2016 by Ayriel

Chemistry
Construct a cooling curve (looks the same as a heating curve) for a substance with a molar mass of 200 that has a gas phase specific heat capacity of 2.9J/g K, a boiling point of 525 K,a liquid phase specific heat capacity of 3.24 J/g K, a freezing point of 352 K, a solid ...
Sunday, February 7, 2016 by Neveah

Chem
For a substance to look red, describe how it interacts with white light?
Friday, February 5, 2016 by Dee

Chemistry
a. Calculate the expected freezing-point depression of a 0.200 m KNO3 solution. b. Will the value you calculated match the actual freezing-point depression for this solution? Why or why not? a). -0.372 degrees Celsius b). Possibly because not all of the substance ionizes 100% ...
Wednesday, February 3, 2016 by Drew

criminal justice
Schlomo occasionally drinks beer with friends. His drinking doesn’t interfere with his job or personal obligations. He gets a pleasant “buzzed” feeling from two beers and doesn’t feel a need to drink more. Alcohol has not caused him any physical or ...
Monday, February 1, 2016 by Julia

Chemistry
Of the following (a through e), which increase and which decrease, as the strength of the attractive noncovalent interactions increases? Explain. a) Deviations from the ideal ga law b) Boiling Temperature c) Sublimation temperature d) Vapor Pressure e) The energy it takes to ...
Sunday, January 31, 2016 by Anonymous

Physica
Had this question answered answered before but I could not understand the explanation. Can someone else please help me? What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when ...
Sunday, January 31, 2016 by Larisa

Physics
What is the likely identity of a substance (see Table 10-1) if a sample has a mass of 9.38 g when measured in air and an apparent mass of 8.55 g when submerged in water? A)Copper B)Iron or steel C)Aluminum D) Lead E)Concrete F)Gold
Sunday, January 31, 2016 by Larisa

Science
if a strong odour is smelt continuously for some time the sensation of smell of that substance weakness why?
Sunday, January 31, 2016 by Rabin

Science
Plz correct me!! A student combined water, sugar, and salt in a beaker. Which of the following statements is true? (1 point) The individual substances can be separated by physical means. The individual substances cannot be separated by physical means.* A new substance is made ...
Thursday, January 28, 2016 by Vanessa

Science
Check my answers!! Plz 1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a ...
Thursday, January 28, 2016 by Vanessa

chemistry
Describe the circumstances in which the following processes could be used to separate the components of a mixture. -sublimation -crystallization -evaporation of a solvent from a solution -dissolving of an impure substance in a solvent
Wednesday, January 27, 2016 by cara

Science Plzz correct me!!!
What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 point) ...
Wednesday, January 27, 2016 by Samantha

Science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Wednesday, January 27, 2016 by Samantha

chem
How much heat (in kJ) is required to warm 10.0 g of ice, initially at -13.0 ∘C, to steam at 109.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C. The heat capacity of liquid water is 4.18 J/g⋅∘C. ...
Sunday, January 24, 2016 by Gaby

Chemistry
Nicotine is a basic substance and its dissociation constant is about 1.0 x 10-6. To prepare a solution water with 0.01 mol L-1, calculate the PH
Friday, January 22, 2016 by Alan

Biochemistry
If the same amount of heat is added to equal masses of each of the following substances, which substance will undergo the largest temperature change? Substance Specific heat(j/gC) Al (s) 0.90 Cl2(g) 0.48 C6H6(l) 1.7 H2O (l) 4.2 NaCl(s) 0.87 temp. change = 1/S.H. (specific heat...
Friday, January 22, 2016 by Jessie

Science
Which of the following is pure substance? Chocolates milk Orange juice Seawater Hydrogen peroxide I'm not sure what's the right answer!!
Friday, January 22, 2016 by Jacky

Health connexues academy
when reading a recipe ingredients, which substance make the recipe an unhealthy choice if it is present in a high amount A.fiber B.protein C. trans fat D. unsaturated fat
Monday, January 18, 2016 by dasha

Chemistry
Would a substance that has a granular appearance, is not soluble, melts under a bunsen flame, and does conduct as a solid or liquid have an ionic, covalent or metallic bond?
Friday, January 15, 2016 by Anonymous

Chemistry
Would a substance that is shiny, does not dissolve in water, does not melt under a bunsen flame, and does not conduct as a solid have a covalent, ionic, or metallic bond?
Friday, January 15, 2016 by Anonymous

Physics
If the substance of 1kg mass is converted completely into energy then how many kilowatt energy will be produced?
Thursday, January 14, 2016 by Akhter

Chemistry
Would a substance that is shiny, does not dissolve in water, does not melt under a bunsen flame, and does not conduct as a solid have a covalent, ionic, or metallic bond?
Wednesday, January 13, 2016 by Anonymous

SCIENCEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. ...
Wednesday, January 13, 2016 by CUPCAKE HELP

HEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELPP
Melinda’s science teacher gave her an unknown substance to identify based on its properties. After a few tests, Melinda listed her observations in a chart. reflects light very well warms up in my hand flattens out when hit with a hammer conducts electricity Which kind of...
Monday, January 11, 2016 by CANDY HELP

math
the amount of radioactive substance prsent at anytime is given by q(t)=Q0e-0.1 How will it take for the radioactive substance x to decay to 30% of its original amount?
Sunday, January 10, 2016 by robyn

MATH Precalculus
1) A radioactive substance decays exponentially. A scientist begins with 150 milligrams of a radioactive substance. After 26 hours, 75 mg of the substance remains. How many milligrams will remain after 46 hours? 2) A house was valued at $110,000 in the year 1988. The value ...
Saturday, January 9, 2016 by Hai

Chemistry
Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass of substance A is twice the mass of substance B. The specifi c heat capacity of substance B is twice the specifi c heat capacity of substance A. ...
Wednesday, January 6, 2016 by Anonymous

chemistry, physics
How would you be able to utilize a calorimeter to determine the specific heat of substance that has a lower density than water?
Wednesday, December 16, 2015 by miyabi

maths
The half-life of lead is 22 years. How long will it take for a sample of this substance to decay to 80% of its original amount
Sunday, December 13, 2015 by Anonymous

Algebra
Use the formula pH = −log[H^+] 9.. The hydrogen ion concentration of a substance is 4.3*10^-6 × moles per liter.Find the pH. Round to the nearest tenth. 10. Find the hydrogen ion concentration of a solution whose pH is 5.3.
Thursday, December 10, 2015 by john

7th Math
I previously posted this today at 5:39 am and I am reposting this because I don't want this to be buried with other unanswered questions and I realized this was the wrong subject. Please check the 2 questions/problems along with my answers. Thank you tutors. Writing Ratios...
Wednesday, December 2, 2015 by anon

Algebra
Please check the questions/problems along with my answers. Thank you tutors. Writing Ratios 1. Top-of-the-line monster masks are made of rubbery silicone, using a liquid silicone base and a catalyst (substance that speeds up a chemical reaction) in a ratio of 1 to 1. What is ...
Wednesday, December 2, 2015 by anon

Algebra 2
A radioactive substance decays at a rate of y = ae^-0.1483t, where t in in hours. Find the half-life of the substance. How do I solve this problem if I am only given the constant.
Tuesday, December 1, 2015 by Sammantha Avants

Chemistry
A substance undergoes a first-order decomposition. After 40.0 min at 500 degrees C, only 12.5% of the original sample remains. What is the half-life of the decomposition? If the original sample weighted 243 g, how much would remain after 2 hours?
Monday, November 30, 2015 by Bob

chemistry
Two substance have the same mass and are both initially at 15.0 C. They both absorb 110 J energy. Which substance will have the higher temperature, the one with the higher or lower specific heat? Explain
Monday, November 30, 2015 by miyabi

chemistry
How do you work out the pKa of a substance from the titration curve that has two equivalence points?
Monday, November 30, 2015 by Adam

HEALTH PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1. The functions of the respiratory system are (select all that apply) A. to pump blood to your body B. to deliver oxygen to the body C. to remove carbon dioxide from the body D. to absorb nutrients 2. The dome-shaped muscle that lies below the lungs and is important in the ...
Wednesday, November 25, 2015 by goldensparklegirl222

Calculus
The amount remaining of a radioactive substance after t hours is given by A(t) = 100ekt. After 12 hours, the initial amount has decreased by 4%. How much remains after 48 hours? What is the half-life of the substance?
Monday, November 23, 2015 by Bill

Pre-calculus
Initially 600 milligrams of a radioactive substance was present. After 7 hours the mass had decreased by 3%. Construct an exponential model A(t) = A0ekt for the amount remaining of the decaying substance after t hours. Find the amount remaining after 24 hours.
Monday, November 23, 2015 by Kim

Physical sciences
Should 20 g of aluminium be mixed with 65 g of iron oxide and ignited, which substance will be the limiting reagent?
Monday, November 23, 2015 by Anelisa

P.E/Health
1. When consuming fats the healthiest choice is foods high in? A. saturated fats B. unsaturated fats * C. trans fat D. cholesterol 2. The body's main energy source should come from what essential nutrient? A. protein B. fat C. carbohydrate*** D. minerals 3. The essential ...
Sunday, November 22, 2015 by Cami

Physics
Using the data in the table below,determine how many calories are needed to change 100g of solid x at 10degrees celcious to a vapour at 210degrees celcious:thermodynamic constants for substance x: heat of fusion 40,0cal/g heat of vaporization 150,0cal/g melting point 10,0'...
Sunday, November 22, 2015 by John

Pre Calculus 1
thirty percent of a radioactive substance decays in four years. assuming the decay is exponential, find the half life of the substance. the beginning of 1975 the population of a country was 40 million and growing at a rate of 3% per year. Assume that the growth is exponential...
Wednesday, November 18, 2015 by Yasmine

Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown substance?
Sunday, November 15, 2015 by Jorge

Chemistry
Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A -251 B -403 C 213 D -511 My thoughts: [(2)(-511)+(213)(2)]-[(2)(-251)+(-403)]=​309kJ (but apparently that is not the correct answer) What...
Sunday, November 15, 2015 by Miranda

Chemistry Dr. BOB
In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4- in acidic solution. Fe2+(aq) + MnO4-(aq) ? Mn2+(aq...
Sunday, November 15, 2015 by Dalton

math
In a science experiment, the temperature of a substance is changed from 42°F to -54°F at an average rate of -12 degrees per hour. Over how many hours does the change take place? **Write as an expression and solve THANK YOU!
Tuesday, November 10, 2015 by kimie

AP Chemistry
Hey guys! I have answers, but am confused. Please and thanks for any help! A) Which of the following is false? 1.A spontaneous change occurs by itself without assistance. 2.The greater the statistical probability of a state, the greater is its entropy. 3.A non-spontaneous ...
Monday, November 9, 2015 by Allie

Science for connections academy HELP!
Tony's teacher gave him an unknown substance to identify on its properties. after a few tests Tony listed his observations. Solid at room temperaure. Brittle. Conducts electrcity. What kind of substance does tony have? A:nonmetal B:Metal C:Metalloid D:Noble gas Please say ...
Tuesday, November 3, 2015 by Emily Peppo

Chemistry
Oganic solvents are not suited to be heated with one of the followings: Oil Bath Electric hot plate Water bath Bunsen burner flame 2 Which of the following is not an inflammable liquid ? Water Ethanol Kerosine Benzene 3 These are some safety precausions necessary in a ...
Friday, October 23, 2015 by Wilson

Chemistry
an object with a mass of 24g and a volume of 32ml is most likely what substance
Wednesday, October 21, 2015 by Jennifer

chemistry
Can a substance,that cannot be electrolysed,conduct electricity?Why?
Monday, October 19, 2015 by sujal

math with application
If 12 % of a radioactive substance decays in 7 hours, what is the half-life of the substance? Carry out all calculations exactly, then round the final answer to three decimal places. The half life is what hours?
Friday, October 16, 2015 by liv

science
is tap water a pure substance..?
Thursday, October 15, 2015 by sally

English Comp.
(1) After Sean was arrested for breaking into a pawnshop, I began to wonder. (2) Why did some kids from my neighborhood end up in trouble while most of us didn't? (3) I started out with a question: What causes young people to make bad choices? (4) Now, after two years of ...
Wednesday, October 14, 2015 by Jasmin

phyical science
Which of the following is NOT a pure substance? A. milk B. oxygen C. water D. carbon dioxide
Sunday, October 11, 2015 by sidney

Organic Chemistry
Simple Distillation: What is the molar composition of the vapor in equilibrium with a boiling liquid that has a composition of 60% A and 40% B? I know that the vapor should be richer in the lower-boiling substance, which is A in this case. And: If a sample of the vapor has the...
Friday, October 9, 2015 by Sasha

Science
The half life of Uranium-238 against alpha decay is 4.5*10^9 years.Calculate the number of disintegrations taking place in 1gm of the substance.
Wednesday, October 7, 2015 by Anju

Chemistry
A certain substance undergoes decomposition by a first-order reaction which has equal to 30.0 minutes. If the initial concentration of the substance is 1.28 mol/liter, what will its concentration be after 2.50 hours? 1. 0.36 M 2. 0.040 M 3. -0.32 M 4. 0.020 M 5. 0.16 M 6. None...
Thursday, October 1, 2015 by Jim

chemistry
consider the following reaction Ca + 2HCI CaCl2 +h2 identify the substance that is oxidized identify the substance that is reduced identify that is oxidizing agent identify the reducing agent
Thursday, October 1, 2015 by woin hareg

Chemistry
4.760 g of a substance (containing only C, H, and O) is burned in a combustion analysis apparatus. The mass of CO2 produced is 1.276×101 g, and the mass of H2O produced is 3.134 g. What is the empirical formula of the compound? I keep getting CH5O2, which is incorrect!
Monday, September 28, 2015 by Sarah

chemistry
Predict which pure substance has the following chemical and physical properties: white solid at room temperature, high melting point, soluble in water, highly conductive when dissolved in water, reactive with acids, and high pH. A) zinc oxide B) sodium hydroxide C) molecular ...
Monday, September 28, 2015 by Jacob Harver

Government
I don't know im just confused how this question relates to government. Which of the following would a political party consider a “quality” candidate for national office? Question 3 options: A) An unknown mayor from Alaska. B) A self-employed computer hacker. C) A...
Thursday, September 24, 2015 by Jamie

Chemistry
Suppose water contained some harmful volatile substance. How could you easily remove the volatile substance in a laboratory?
Wednesday, September 23, 2015 by Z

Algebra
Each ounce of a substance A supplies 2% of the nutrition a patient needs. Substance B supplies 10% of the required nutrition per ounce, and substance C supplies 16% of the required nutrition per ounce. If digestive restrictions require that substances A and C be given in equal...
Tuesday, September 22, 2015 by Jamie

Algebra
If 18g of a radioactive substance are present initially and 8 yr later only 9 g remain, how much of the substance will be present after 20 yr?
Tuesday, September 22, 2015 by Sasha

Chemistry 2
Given the following information at 25C, calculate G at 25 degrees Celsius 2A(g)  B(g) ±£ 3C(g) Substance Hf  (kJ/mol) S(J/molK) A(g) 191 244 B(g) 70.8 300 C(g) -197 164 a. -956 kJ b. 956 kJ c. 346 kJ d. 346 kJ e. -1.03 * 10^...
Monday, September 21, 2015 by nikk

Chemistry Help!
When C2H4O2 burns in oxygen, the products are carbon dioxide and water. How many grams of water are obtained from burning 4.76 g of this substance? How would I solve this problem?
Saturday, September 19, 2015 by wdym

ME
Problem 3: Consider water as the substance. (a) Find the specific internal energy (Btu/lbm) when T = 500F and P = 375 psia (b) Find the pressure (psia) when T = 500F and v = 0.02024 ft3/lbm (c) Find the specific volume (ft3/lbm) when T = 500F and h = ...
Saturday, September 19, 2015 by sara

Biology
Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by becoming part of the ...
Wednesday, September 16, 2015 by Jello

chemistry
Oganic solvents are not suited to be heated with one of the followings: Oil Bath Electric hot plate Water bath Bunsen burner flame 2 Which of the following is not an inflammable liquid ? Water Ethanol Kerosine Benzene 3 These are some safety precausions necessary in a ...
Wednesday, September 16, 2015 by onyi

chemistry
1 In the reaction of potassium permanganate and iron salt in acidic medium, how many moles of manganese reacted with iron? 2 moles of Mn with 1 mole of Fe 1 mole of Mn with 5 moles of Fe 1 mole of Mn reacts with 1 mole of Fe 5 moles of Mn reacts with 1 mole 2 Which of the ...
Wednesday, September 16, 2015 by onyi

chemistry
When chemicals pour on the skin, the laboratory first aid is to ---------------. Apply 1% sodium carbonate Apply 1% boric acid solution Flush the eye with a copious amount of clean lukewarm running water Wash with soap and warm water 2 For cut sustained in the laboratory ...
Wednesday, September 16, 2015 by onyi

Social Studies
Please check my answers :) 1. Which of the following means producing just enough to meet the families' needs, with little left to sell or exchange? a. harvesting b. substance farming**** c. cash crop d. tidewater farming 2. The Proclamation of 1763 called for a. settlers ...
Tuesday, September 15, 2015 by Alexis

College Chemistry
A 43.70 g sample of a substance is initially at 24.7 °C. After absorbing 1757 J of heat, the temperature of the substance is 120.5 °C. What is the specific heat (c) of the substance?
Tuesday, September 15, 2015 by Angel

Chemistry2
A student pours 200 grams of methanol, a flammable substance into the sink. Another student causes the bad situation to get evern worse by dropping a lit match into the sink. The methanol burns completely with 300 grams of oxygen from the air. What mass, in grams, is converted...
Wednesday, September 9, 2015 by Sam

life orientation
Examine how each of the following are responsible for road accidents and propose practical solutions by the community to the competence of the drivers,substance abuse,pedestrians,cyclists and livestock
Tuesday, September 8, 2015 by sammie

Chem
A carless chemistry student pours 200 grams of methanol, a flammable substance into the sink. Another careless chemistry student causes the bad situation to get even worse by dropping a lit match into the sink. The metanol burns completely with 300 grams of oxygen from the air...
Sunday, September 6, 2015 by Sara

science
the spectator ions of all substance that are soluble of the reaction
Wednesday, September 2, 2015 by kholofelo

math calculus
Find the half-life (in hours) of a radioactive substance that is reduced by 30 percent in 40 hours.
Sunday, August 30, 2015 by Urgent help

Chemistry
What can be said about a substance with a triple point above 1atm 1) The liquid state of the substance cannot exist. 2) The gaseous state at 1 atm pressure cannot be condensed to the solid at the triple point temperature. 3) The melting point of the solid must be greater than ...
Friday, August 28, 2015 by Trinh

physics
A person hammered a 0.5 kg something (substance ) with a hammer that its weight is 2.5 kg , with the velocity 65 m /s ,, if one third of the hammer's energy turn into the internal energy to both of the substance and the hammer , then what is the change (increasing ) ...
Wednesday, August 26, 2015 by MAD

chemistry
1 A metal X that raects with metal Y in a solution of Y but does not react with Z in a solution of Z means that --------------. Metal Y is the least reactive Metal X is the least reactive Metal Z is the least reactive Metal Y and metal Z have equal reactivity 2 Oxidation can ...
Monday, August 24, 2015 by mike

chemistry
1 In the reaction of potassium permanganate and iron salt in acidic medium, how many moles of manganese reacted with iron? 2 moles of Mn with 1 mole of Fe 1 mole of Mn with 5 moles of Fe 1 mole of Mn reacts with 1 mole of Fe 5 moles of Mn reacts with 1 mole 2 Which of the ...
Monday, August 24, 2015 by mikel

chemisrty
1 When chemicals pour on the skin, the laboratory first aid is to ---------------. Apply 1% sodium carbonate Apply 1% boric acid solution Flush the eye with a copious amount of clean lukewarm running water Wash with soap and warm water 2 For cut sustained in the laboratory ...
Monday, August 24, 2015 by mikel

Physics
The relative density of a solid is 6.5. Find (1)the mass of a solid substance cube of side 20cm. (2) the volume of the substance if the mass is 1.3kg
Friday, August 14, 2015 by Oluchi

College Algebra
A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) = 9e−0.012t b) How much of the mass remains after 49 days? (Round your answer to one decimal place.)
Friday, July 31, 2015 by Melany

Math
the half life of a radioactive substance is one day. You have 100 grams. how much of the substance would be left after a week?
Thursday, July 30, 2015 by Jo

College Algebra
A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t) = 9e−0.012t where m(t) is measured in kilograms. (a) Find the mass at time t = 0.
Wednesday, July 29, 2015 by Melany

science
water has a density of 1.0 g/ml, and a test liquid has a density of 1.1 g/ml. If you pour equal portions of the two liquids into a cup,what will happen(assuming that the substance do not mix or create a chemical reaction
Tuesday, July 28, 2015 by earica

Science
36kg of some material undergoes a process in a piston-cylinder apparatus starting with an initial volume of .057m^3 and pressure of 680kPa. The final volume is twice the initial. Compute the work done by the substance for the following processes: (a) Pressure times volume is ...
Monday, July 20, 2015 by J.T.

calculus
The rate of decay in the mass, M, of a radioactive substance is given by the differential equation dM dt equals negative 1 times k times M, where k is a positive constant. If the initial mass was 100g, then find the expression for the mass, M, at any time t.
Friday, July 17, 2015 by Anonymous

chemistry
Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical reaction that will inflate ...
Tuesday, July 7, 2015 by kate

pre calculus
32% of a particular radioactive substance disappears in 227 years. Part 1: Find the decay constant. Your answer must be correct to five decimal places. Part 2: Determine the time T in years required for 93% of the substance to disapper. Your answer must be correct to two ...
Monday, July 6, 2015 by Morgan

Science
A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failure in humans. Which of the following preliminary steps should the scientist take before conducting a controlled experiment? A. Establish a cause ...
Wednesday, June 24, 2015 by Lil

Chemisrty
Calculate the grams of substance from the moles of substance given.... 2 moles C6H10O5. Please help I am lost!
Wednesday, June 17, 2015 by Michelle

Chemistry
Equilibrium constants at 25 ∘C are Substance Kc Value of Kc CaCO3 Ksp 4.5×10−9 H2CO3 Ka1 4.3×10−7 Ka2 5.6×10−11 What is the molar solubility of marble (i.e., [Ca2+] in a saturated solution) in acid rainwater, for which pH=4.20?
Tuesday, June 16, 2015 by Samantha

statistics
twelve different vTideo games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the sample data to construct a 95...
Monday, June 15, 2015 by melissa jones

physics
Two bars of identical mass are at 29 °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 92 °C, ...
Sunday, June 14, 2015 by ashley

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