Final Chemistry Quizziz

What is Avogadro's Number?

• 6.021 × 10^23.

• 6.02314 × 10^23

• 6.022× 10^23

• 6.02252126 × 10^23.

How many groups are there in the periodic table?

• 16

• 12

• 14

• 18

What is the molar mass of hydrochloric acid?

• 88.4621 g/mol

• 36.458 g/mol

• 64.2913 g/mol

• 56.438 g/mol

What is the purpose of balancing equations?

• To make equations easier to solve

• To make equations look more aesthetically pleasing

• To ensure that the equation is accurate

• To make equations easier to read

What is the first step in balancing an equation?

• Identify the reactants and products

• Count the number of atoms on each side

• Adjust the coefficients of the reactants and products

• Add coefficients to the reactants and products

What is the molar mass of potassium carbonate?

• 102.34 g/mol

• 138.205 g/mol

• 88 g/mol

• 130.34 g/mol

Balance the following equation: CH4 + O2 = CO2 + H2O

• 1, 2, 1, 2

• 2, 1, 2, 1

• 1, 2, 2, 1

• 2, 1, 1, 1

Calculate the molar mass of calcium carbonate (CaCO3)

• 99.01 g/mol

• 69.99 g/mol

• 101.1 g/mol

• 100.09 g/mol

What are the three states of matter?

• Solid, water, gas

• Solid, liquid, grass

• Solid, liquid, gas

• Earth, water, air

The atomic number of an element above the element in the Periodic Table?

• True

• False