Chemistry Semester One Final Review

A change of color is a sign of a chemical reaction

• True

• False

Tags

NGSS.MS-PS1-2

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

Tags

NGSS.MS-PS1-1

There will be some change in mass when a chemical reaction takes place.

• I dont know

• False

• true

Tags

NGSS.MS-PS1-5

What is density?

• The amount of space something occupies

• The amount of mass something has

• The ratio of mass relative to the space occupied

• Intelligence level

How many significant figures would the product of the following numbers have: 202 x 20 x 40.121

• 1

• 2

• 3

• 4

• 5

How many significant figures are there in the number 0.0100?

• 1

• 2

• 3

• 4

• 5

What is the product of 2.3 and 20?

• 46

• 50

• 40

• 50.

What is the density of a cube with a side of 5.0 cm and and a mass of 30. g? (include the correct amount of sig figs, but omit the units)

• 150

• .24

• 150.

• .2

How many nanometers is 2.54 km? ( 1 km = 1000 m, 1 m = 1,000,000,000 nm)

• 2.54 x 10¹² nm

• 2.54 x 10⁹ nm

• 2.54 x 10^-9 nm

• 2.54 x 10^-12 nm

How many feet are there in 120 meters? (1m = 100 cm, 1 inch = 2.54 cm, 12 inches = 1 foot)

• 390 ft

• 393 ft

• 4716 ft

• 394 ft