Stoich and Ideal Gas Retest

Front

What is the empirical formula for a compound?

Back

The empirical formula represents the simplest whole-number ratio of atoms in a compound.

Front

What is the empirical formula for C6H6?

Back

CH

Front

How do you calculate the percent composition of an element in a compound?

Back

Percent composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is the percent composition of Carbon in CO2?

Back

27%.

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

In the reaction 1 C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O, what is the excess reactant?

Back

C₃H₈.

Front

What is the difference between empirical and molecular formulas?

Back

The empirical formula shows the simplest ratio of elements, while the molecular formula shows the actual number of atoms of each element in a molecule.

Front

What is the lowest whole-number ratio of atoms in a compound called?

Back

Empirical Formula.

Front

How do you convert Celsius to Kelvin?

Back

Add 273 to the Celsius measurement.

Front

What is the ideal gas law equation?

Back

PV = nRT, where P = pressure, V = volume, n = number of moles, R = ideal gas constant, T = temperature in Kelvin.