M19 L1 Notes Quizizz - Chemical Changes

A chemical reaction is a change in which one or more substances are converted into ____________________ substances.

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NGSS.MS-PS1-5

NGSS.MS-PS1-2

The substances present at the ____________________ of the reaction, the substances that react, are called reactants.

The ____________________ substances produced are called products.

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NGSS.MS-PS1-2

In the 1770s, French chemist Antoine Lavoisier determined that the total ____________________ of the products of a reaction always equal the total ____________________ of the reactants.

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NGSS.MS-PS1-5

When no coefficient appears, a coefficient of ______ is assumed.

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NGSS.MS-PS1-5

Chemists commonly do not work with individual atoms, molecules and ions. They work with larger quantities of reactants, with masses that can be expressed in ____________________.

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NGSS.MS-PS1-5

How many moles make up 50.0 g of NO₂(g)?

What is the mass of 0.2020 mol of NO₂(g)?

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NGSS.HS-PS1-7

When sodium reacts with bromine to form sodium bromide, the product(s) ________.

• Are sodium and bromine

• Are bromine and sodium bromide

• Is sodium bromide

• Is sodium

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NGSS.MS-PS1-1

Which chemical equation is NOT balanced?

• 2H₂(g) + O₂(g) ⟶ 2H₂O(l)

• 2Al(s) + O₂(g) ⟶ Al₂O₃(s)

• CH₄(g) + 2O₂(g) ⟶ CO₂(g) + 2H₂O(g)

• 2Al(s) + 3CuO(s) ⟶ Al₂O₃(s) + 3Cu(s)

Tags

NGSS.MS-PS1-5