If 2.00L of a gas measured at STP has a mass of 3.23g, what is the molar mass of

Question

If 2.00L of a gas measured at STP has a mass of 3.23g, what is the molar mass of the gas? 22.4 g/mol 3.23 g/mol 36.2 g/mol 18.1 g/mol Calculate the density of Cl_2 at STP. 3.17 g/L 3.17 g/ml 0.316 g/L 0.316 g/ml A 1.50-lb package contains how many grams of baking soda? (11b = 453.6g) 454g 0.454g 680g 68.0g Write formulas for these compounds: cobalt (II) bromide _______ iron (III) sulfate _______ Chose 1 term from the following list and give a definition. molecule element electrolyte atom ion sublimation mole liquid dipole electronegativity matter reactant condensation boiling point Nitric acid (HNO_3) reacts with potassium hydroxide (KOH) in a neutralization reaction to produce water and the corresponding salt. For this reaction write the balanced molecular equation the ionic equation the net ionic equation _______ An average cup of coffee (250.0 mL) contains 0.125 g of caffeine, C_8H_10N_4O_2. the molarity of caffeine in the coffee? Show all your work!

Explanation / Answer

Ans 31 . C. 36.2 g/mol

1 mole of a gas occupies 22.4 litre of volume at STP

so the number of moles occupying 2 litre volume = 2 / 22.4 = 0.089 moles

The mass of 0.089 moles is 3.23 g

so the molar mass of the gas will be 3.23 / 0.089 = 36.2 g / mol

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