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chemistry
A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me

chemistry
A nickel is found to have a mass of 5.06 grams. Using unit analysis, show what the mass of this nickel is in ounces.

math
A pharmacist has 2 hectograms 55 grams of pills. Each pill weighs 1 gram 2 centigrams. how many pills does the pharmacist have altoghter?

chemistry
[correction]Calculate the energy in calories lost when 30.0 grams of ethanol cools from 56.5 degree Celsius to -42.0 degree Celsius.

chemistry
how many grams of NaOH should be used to make 200 mL of a 0.24M solution of NaOH starting with a .4M HCL solution

chemistry
how many joules are required to heat a frozen can of juice (360 grams) from -5 degrees Celsius to 110 degrees celsius

Chemistry
The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40.0 percent?

science
Suppose you wanted to produce 1.17 L of a 3.41 M aqueous solution of H2SO4. How many grams of solute are needed to make this solution? (H2SO4)

chemistry
how many grams of iron (iii) nitrate are needed to produce 25.0 g of iron (iii) sulfate form sulfuric acid?

chemistry
Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield?

science
Gold has sold for $523/ounce. How many milligrams of gold could you buy for one cent( 16.0 ounce = 454 grams)

chemistry
24.8 mL sample of a 4.63 x 10–2 M solution of NaCl is mixed with a 30.0 mL sample of a 3.67 x 10–2 M solution of AgNO3. What is the mass, in grams, of AgCl precipitate that forms?

Chemistry 2
A solution of NaOH (aq) contains 8.2 grams of NaOH(s) per 100.0 mL of solution. Calcualte Ph and POH at 25 degrees celsiuis

Science(chemistry)
how much energy is needed to change 53 grams of water from -53 degrees celsius to 160 degrees celsius ?

chemistry
How many grams of sodium hydroxide (NaOH) are needed to prepare 250 mL of a 0.20 M (mol/dm3) sodium hydroxide solution?

Math
How many grams of Ag2S react to form 174 g of AgCl? see below: Ag2S + 2 HCl ==> 2 AgCl + H2S

Science
What is the mass percent of sodium hydroxide in a solution that is made by dissolving 8grams of sodium hydroxide in 50 grams of H2O?

science
what is the weight of the ethyl alcohol that exactly fills a 200.00 ml container? The density of ethyl alcohol is 0.789 grams/ml

math
A metal sphere has a mass of 1 kg. 1 cubic centimeter of this metal has a mass of 4.8 grams. find the radius. how do you work this out?

Chemistry
How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?

Chemistry
Assuming an element's half-life is 3.6 years. How much of 2 grams of the element would remain after 10.8 years?

Chemistry
For the reaction CaCO3(s)+ 2HCl(aq)= CaCl2(aq)+ CO2(g)+ H2O(l) how many grams of CaCl2 can be obtained if 14.6 g HCl is allowed in CaCO3?

chemistry
Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 13.2 g of O2?

science
for every cubic meter of 30 degrees celsius saturated coded to 16 degrees celsius fowmany grams lost

chemistry
An aqueous solution contains 64g of ethanol( C2H5OH) in 122 grams of solution. The mole fraction of ethanol is:

Chemistry
A flask contains 25.0 mL of diethyl ether weighth 18.74 µg (micrograms). What is the density of the diethyl ether and grams per liter?

PHYSICS
CALCULATE THE ENERGY PRESSURE WHEN 20 GRAMS OF STEAM AT 100 DEGREES CELSIUS COOLS TO ICE AT-20 DEGREES CELSIUS.

science
If the solution is saturated at 100 degrees Celsius and then cooled to 30 degrees Celsius, how many grams of solute will precipitate out?

Science
How much graphite carbon must be burned in oxygen gas to produce 2.2 grams of carbon dioxide gas

Chemistry
1.How Many Grams Of Sulphur Contains The Same Number Of Moles As 4.6g Of Sodium? 2.Calculate The Number Of Moles In 28.6g Of Na2CO3.10H2O?

Physics 110
How much energy is needed to raise 500 grams of water from 10 degrees Celsius to 40 degrees Celsius?

chemistry
Given the balanced equation: 2 Al + Fe2O3 → Al2O3 + 2 Fe how many grams of Al2O3 will be produced if 68.1 g Al reacts with 112 g Fe2O3?

Chemistry
Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 42.3 g of Fe?

Chemistry
3 Cl2 + 6 KOH go to KClO3 + 5 KCl + 3 H2O how many moles of KClO3 form when 2 grams of KOH react completely

Chemistry
What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) A) 0.60 g B) 5.7 g C) 1.2 g D) 2.9 g

Chemistry
Based on the following balanced equation: 2 C4H10 + 13 O2 --> 8 CO2 + 10 H2O a. How many moles of CO2 are produced after complete reaction of 8.00 moles of C4H10? b. How many grams of CO2 are produced after complete reaction of 8.00 moles of C4H10? c. How many moles of H2O ...

chem
How many grams of nitric acid(HNO3) will be produced when 0.51 mol of dinitrogen pentoxide reacts with water to form nitric acid?

Chem
What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ A. -0.4 kJ B. 1776.7 kJ C. 0.4 kJ D. -1776.7 kJ E. -6.2 kJ

math
a 14- gram serving of mayonnaise contains 11 grams of fat. what percen tof the mayonnaise, to the nearest tenth of a percent, is fat?

chemistry
How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.

chemistry
How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.

Physics
if the specific heat of aluminum is 0.21 cal/g degree C, how much heat is givin off when 10 grams of aluminum is cooled from .50 to .10 degress

chemistry
3CS2 + 6 NaOH==> 2 Na2CS3 + Na2CO3 + 3 H2O how many grams of Na2CS3 are produced in the reaction of 65 ml of liquid CS2(d=1.26 g/ml) and 1.56 mol NaOH?

Chem
The sedative Demerol hydrochloride has the formula C15H22ClNO2. How many grams are in 0.020 mol of Demerol hydrochloride? I got 6.640g is this right?

chemistry
For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

chemistry
For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

chemistry
The specific heat of ice is 0.5 calories/gram. 60 grams of ice will require _____ calories to raise the temperature 1°C. so i just do 0.5/60 ??

Chemistry
The molar heat of solution of NH4NO3 is 25.7 kJ/mol. How much heat (in kJ) would be required to dissolve 20 grams of NH4NO3 in water?

science
how much energy is required to obtain superheated steam at 115 degrees celcius from 25 grams of water at 10 degrees celcius?

Chemistry - Unit Analysis
The molar mass of cupric chloride is 134.45g/mol. What is the mass, in grams, of 8.19*10^-3 mol of this compound?

physical science
If 22 grams of water are saturated at 75 degrees celsius with potassium nitrate and then cooled to 40 degrees celsius, how much will precipitate?

Chem
AgNO3 (aq) + HCl (aq) ¨ AgCl (s) + HNO3 (aq) 40.30 grams of silver nitrate and excess HCl, how much silver chloride could you make?

Chem
(c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20 thanks!

chemistry
how much heat would it take to raise the temperature of 52.0 grams of water from 22.0 degrees celcius to 100.0 degrees celcius

CHEMISTRY.
Knowing that bleach contatins 5% aqueous sodium hypocholirte, how much sodium hypochlorite does 700ml of 10% bleach contain? (in grams)

chem
given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).

chem
given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).

chemistry
How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction

chemistry
How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction

chemistry
how do you calculate the empirical formula of the barium hydroxide hydrate if a sample consists of 3.70 grams of barium hydroxide and 2.64 gras of water???

chemistry
How many grams of CaO (56.08) are required for complete reaction with HCl (36.46) in 275 mL of a 5.90 M HCl solution? CaO + 2HCl --> CaCl2 + H2O.

chemistry
What volume of solution would be needed to deliver the stated amount of solute? 39.0 grams of solute from a solution that is 16.0 % m/v? (anwser in milliliters

Chemistry
a mixture of 4.00 moles of hydrogen and 3.00 moles of oxygen is ignited, forming water. what is the maximum amount of water in grams that can be formed?

Chemistry
A copper ore consists of 6.32% chalcopyrite, CuFeS2(s). How many grams of ore must be processed to obtain one gram of copper?

Chemistry
if we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be?

Chemistry
What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.

AP Chemistry
We observe that 7 grams of a gaseous com- pound occupies 2102 mL at 49C and 626 torr. What is the molecular weight of the com- pound?

Science
Suppose that 9 grams of a certain substance lost 17.5 calories of heat when the temperature decreased from 70 degrees Celsius to 62 degrees Celsius. What is the Cp

chemistry
A radioactive sample contains 2.45 g of an isotope with a half-life of 3.8 days. How much of the isotope in grams will remain after 11.4 days?

science
if a solution is made by adding 83 grams.of soduim hydroxide to 750 ml.of water what is the percent by mass of sodium hydroxide in the solution?

Chemistry
c) How many grams of each matter is in 2,0 litres of the following water solutions i) 8,6 til-% ethanol solution ii) 22,6 til-% glycol solution (1,2-ethanediol)

chem
How many grams of the adipic acid (C6H10O4) could form from the reaction of 15.00 g of cyclohexane (C6H12) with the 25.00 g of oxygen? Will the formula be... 2O2 + C6H12 ---> C6H10O4

Biology/ Chemistry
You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g

chemistry
how many grams of silver carbonate will precipitate when excess ammonium carbonate soln is added to 41.0 mL of a .518 M silver nitrate solution?

Chemistry
2.16 grams of silver react with 3.20 grans of sulfur.Caculate the mass of silver sulfide produced (mass of ag=108.8g/mole)

Chemistry
Electrochemistry In the electrolysis of aqueous copper(II) bromine CuBr2(aq, 1.00 g of copper is deposited at the cathode. How many grams of bromine are produced at the anode?

Science, chemistry
During the experiment, 100ml will be required to prepare 0.5M solution of NaNO3. Calculate the mass of NaNO3 in grams that will be required.

Chemistry
If the half life of Pu-239 is 2.4 x 10^4 years, how many years are required for a 20-gram sample of plutonium-239 to be reduced to a mass of 5 grams?

Chemistry
If you have 1911.9 g of a bleach solution. The percent by mass of the solute sodium hypochlorite NaOCl is 3.62. How many grams of NaOCl are in the solution

chemistry
You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?

Chem
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ---> 2 FeCO3 (s) + H4SiO4 (aq) how many grams of Fe2SiO4 (s) are required to completely react with 55.0 mL of .500 M H2CO3 (aq) ?

science
kevin has a piece of aluminum which has a density of 2.7gms/cm3 and a mass of 63 grams what is the volume of the piece of aluminum

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO -> Hg + O2

Health
Does anyone know what our daily percentage of carbs is? And how many grams of starch we need in our daily diets? Please help.

chemistry
what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?

chemistry
what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?

chem
When 13 grams of a sample cools from 56c to 34.4cit loses 25.8 Joules of heat. What is the specific heat of the sample?

chemistry
how many grams of ethyl alcohol are needed to produce 1 L of a 2 mM solution if 1 mole =46g of ethyl alcohol. how do you calculate?

CHEMISTRY
The specific heat capacity (cp) of lead is 0.13 J/g °C. How much heat (in J) is required to raise the temperature of 15 grams of lead from 22 °C to 37 °C? a. 2.0 b. -0.13 c. 0.13 d. 29

CHEMISTRY
The specific heat capacity (cp) of lead is 0.13 J/g °C. How much heat (in J) is required to raise the temperature of 15 grams of lead from 22 °C to 37 °C? a. 2.0 b. -0.13 c. 0.13 d. 29

college
Primitive air consists of 58% H2O 32% CO2 10% N2 so how many grams of primitive air do you need to react with 1 gram of H2?

chemistry
Calculate the mass, in grams, of each of the following. a) 1.2×10^23 gold atoms b) 2.78×10^22 helium atoms c) 2.0×10^23 lead atoms d) 7.6×10^21 uranium atoms

chemistry
a student dissolves 5 grams of table salt into 600 mL of water. in this situation, water is the _, and salt is the _

science
If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?

chemistry
How many grams of NH3 form when 27.5L of H2 (measured at STP)react with N2 to form NH3 according to: N2(g) + 3H2 (g) = 2NH3 (g)

Anatomy and Physiology
calculate the percent KBr in a solution containing 0.88 grams KBr per 800 mL solution.

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