PS Ch 7 Review

The substances that undergo change in a chemical reaction are called

Tags

NGSS.MS-PS1-2

A solution of silver nitrate, AgNO₃, is added to a solution of sodium chloride, NaCl. After the reaction is complete, solid AgCl (silver chloride) and NaNO₃ (sodium nitrate) remain as precipitates. What are the products of this chemical reaction?

• AgNo₃ and NaCl

• AgNO₃ and AgCl

• AgCl and NaNO₃

• NaCl and NaNO₃

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

What does the ARROW in a chemical equation mean?

Which of the following is a balanced chemical equation for the synthesis of NaBr from Na and Br₂?

• Na + Br₂ --> NaBr

• 2Na + Br₂ --> NaBr

• Na + Br₂ --> 2NaBr

• 2Na + Br₂ --> 2NaBr

Tags

NGSS.HS-PS1-7

The coefficients in a balanced chemical equation always express the ratio of

• moles of reactants and products

• volume of reactants and products

• atoms of reactants and products

• mass of reactants and products

Tags

NGSS.HS-PS1-7

A _____ is the number that appears before a formula in a chemical equation.

Tags

NGSS.HS-PS1-7

A _____ is a representation of a chemical reaction in which the reactants and products are expressed as formulas.

Tags

NGSS.HS-PS1-7

A _____ is an amount of a substance that contains approximately 6.02 x 10²³ particles of that substance.

How many atoms are present in 3 moles of silicon?

• 6.02 x 10²³ atoms

• 1.80 x 10²³ atoms

• 28.086 atoms

• 3 x (6.02 x 10²³) atoms

The molar mass of carbon is ______ g.