What does it mean if there is no coefficient written IN FRONT of a chemical formula or no subscript written next to an elements symbol IN a chemical formula?

there is only 1 of that unit or element present

there are no units or elements present

What is a coefficient?

number written in front of an element or compound

number written at the bottom left of an element symbol

Which reaction would you expect to occur at a faster rate?

A piece of metal is added to a high concentration of acid at 31 degrees Celsius.

A piece of metal is added to a high concentration of acid at 25 degrees Celsius.

A piece of metal is added to a low concentration of acid at 25 degrees Celsius.

A piece of metal is added to a low concentration of acid at 15 degree Celsius.

The four factors that increase the rate of reaction are

temperature, concentration, surface area, and the addition of a catalyst

temperature, pressure, volume, and moles

What happens when particles collide with enough energy?

The bonds between the atoms will break

What is a chemical equation?

A representation of a chemical reaction

What is the purpose of a chemical equation?

To represent a chemical reaction

To show the physical state of substances

To measure chemical quantities.

Chemical Reactions and Equations Chapter 10

Interactive Video

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Science

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7th Grade

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Practice Problem

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NGSS

MS-PS1-5, MS-PS1-2, HS-PS1-5

Standards-aligned

Anna Rogers

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48 questions

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