Unit 4 Flashcardizz: Moles & Stoichiometry- 2024-2025

Front

What is an empirical formula?

Back

An empirical formula is the simplest whole-number ratio of atoms of each element in a compound.

Front

What is the empirical formula of C4H6?

Back

C2H3

Front

How do you calculate the number of atoms in a sample of a compound?

Back

To calculate the number of atoms, first determine the number of moles in the sample, then multiply by Avogadro's number (6.022 x 10^23 atoms/mol).

Front

How many atoms are in 456 g of carbon dioxide (CO2)?

Back

1.871 x 10^25 atoms.

Front

What type of reaction is represented by the equation 2NO2 -> N2 + 2O2?

Back

Decomposition reaction.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products.

Front

How do you calculate molar mass?

Back

To calculate molar mass, sum the atomic masses of all atoms in a molecule.

Front

What is the molar mass of B2(CO3)3?

Back

201.648 g/mol.

Front

What is percent composition?

Back

Percent composition is the percentage by mass of each element in a compound.

Front

How do you calculate percent composition?

Back

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