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1. the 1.000 L flask was filled with gas from the experiment at an atmospheric pressure of 30.48 inches of Hg and a temperature of 25.4 degrees C. Find moles of gas in the flask.
2. After creating 1.000 L of gas, the mass loss of the iron nail was 1.511. How many moles of iron were converted to Fe3+?
3. After creating 1.000 L of gas, the mass loss of the iron nail was 1.544. How many moles of electrons left the iron?
calculate the approximate mass of KHP required to react with 40.0 mL of 0.125 M sodium hydroxide in titration.
If 5.50 g of the unknown compound contained 0.183 mol of C and 0.367 mol of H, how many moles of oxygen, O, were in the sample?
What is the volume occupied by 0.265mol of helium gas at a pressure of 1.28atm and a temperature of 307K
How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7g Fe? Fe2O3(s) + 3CO(g) -> 3CO2(g) + 2Fe(s)
A solution is prepared by dissolving 11.5 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.00 mL sample of this stock solution is added to 52.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
Write the balanced chemical equation using the lowest possible whole number coefficients for Fe2O3+2Al = 2Fe+Al2O3.
Cyanogen is a gas which contains 46.2 % C and 53.8 % N by mass. At a temperature of 25oC and a pressure of 750 mmHg, 1.50 g of cyanogen occupies 0.714 L.
What is the total anion concentration (in mEq/L) of a solution that contains 6.0 mEq/L Na+, 13.0 mEq/L Ca+
Predict the outcome of the following reactions represented by the following equations by using the activity series, and balance the equations.
what is the mass in grams of 30.0 mL of the liquid propylene gylcol, a moisturizing agent for foods, which has a density 1.036 g/mL at 25 degree Celsius.
A solution of potassium hydroxide of unkown concentration is used to titrate 15.0 mL of a 2.5M sulfuric acid solution. The volume of the base is needed 27.2mL. What is the molarity of the base?
what mass of Na2SO4 is needed to prepare 350. ml of a solution having a sodium ion concentration of 0.125 M.
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