Chemical Reactions

In a chemical reaction, all of the atoms present at the start of the reaction

• Will not be present in the products

• Will be present in the products, and in the same arrangements

• Will be present in the products, in different arrangements

Tags

NGSS.MS-PS1-5

The mass of the reactants must

• Be greater than the mass of the products

• Be less than the mass of the products

• are unmeasurable

• Be the exact same as the mass of the products

Tags

NGSS.MS-PS1-5

Found on the left side of the arrow

• products

• coefficients

• yield

• reactants

Found on the right side of the arrow

• products

• reactants

• subscripts

• indicators

Tags

NGSS.MS-PS1-5

If a reaction seems to break the law of conservation of mass by having a lower product mass than reactant mass, it was most likely done in

• closed system

• open system

• an uncovered system

• a reaction vessel

Tags

NGSS.MS-PS1-5

For an equation to be balanced, the number of atoms must

• be different on both sides of the arrow.

• be the same on each side of the arrow.

• can be different as long as the same type of elements are present.

• They do not matter, only the coefficients matter.

Tags

NGSS.MS-PS1-5

tell you the number or atoms present in a chemical equation.

• Subscripts

• Reactants

• Coefficients

• Products

This is the big number before substances that tell you how many of that substance there is

• coefficient

• subscript

• reactant

• product

What is the subscript on the product hydrogen (H)?

• 2

• 3

• 12

• 6

Tags

NGSS.MS-PS1-1

What happens to the atoms of matter after a chemical change?

• The atoms are destroyed.

• New atoms are created

• Bonds are broken and new bonds are formed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5