Unit 5 Test

Front

What is percent yield?

Back

Percent yield is a measure of the efficiency of a reaction, calculated as (actual yield / theoretical yield) x 100%. It indicates how much product was actually obtained compared to what was expected.

Front

How do you calculate the percent yield of a reaction?

Back

Percent yield = (actual yield / theoretical yield) x 100%.

Front

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the number of grams from moles?

Back

To find grams from moles, use the formula: grams = moles x molar mass.

Front

What is the formula for calculating moles from grams?

Back

Moles = grams / molar mass.

Front

What is the molar mass of Aluminum Hydroxide (Al(OH)3)?

Back

The molar mass of Al(OH)3 is approximately 78.00 g/mol.

Front

How do you determine the limiting reactant in a chemical reaction?

Back

The limiting reactant is the substance that is completely consumed first in a reaction, limiting the amount of product formed. It can be determined by calculating the moles of each reactant and comparing their ratios.

Front

What is a stoichiometric calculation?

Back

A stoichiometric calculation involves using the coefficients of a balanced chemical equation to determine the relationships between reactants and products.

Front

How many moles are in 98.3 g of Aluminum Hydroxide (Al(OH)3)?

Back

There are 1.26 moles of Aluminum Hydroxide in 98.3 g.

Front

What is the significance of the coefficients in a balanced chemical equation?

Back

Coefficients indicate the ratio of moles of each substance involved in the reaction, which is essential for stoichiometric calculations.