Chemistry Unit IV FLASHCARDIZZ

Front

How many significant figures are in the number 6004?

Back

4 significant figures.

Front

What is the first step to solve a stoichiometry problem?

Back

Write a Balanced Equation.

Front

Determine the mass of 2.40 moles of C6H12.

Back

201 g.

Front

How many significant figures are in the number 70.0?

Back

3 significant figures.

Front

What coefficients are needed to balance the reaction KNO3 --> KNO2 + O2?

Back

2, 2, 1.

Front

Define significant figures.

Back

Significant figures are the digits in a number that contribute to its precision.

Front

What is stoichiometry?

Back

Stoichiometry is the calculation of reactants and products in chemical reactions.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all atoms in the compound.

Front

What is the purpose of a balanced chemical equation?

Back

To ensure that the number of atoms for each element is conserved in a reaction.

Front

What is the difference between an empirical formula and a molecular formula?

Back

An empirical formula shows the simplest ratio of elements, while a molecular formula shows the actual number of atoms.