Unit 2 Review

Convert this number into scientific notation: 0.068

• 6.9 x 10⁶

• 6.8 x 10^-9

• 6.8 x 10^-2

• None of the above

Convert this number into scientific notation: 950,000

• 9.5 x 10⁵

• 9.5 x 10^-9

• 9.5 x 10²

• None of the above

Which value is the greatest?

• 5.0 x 10^-9

• 5.0 x 10^-4

• 5.0 x 10⁶

• 5.0 x 10⁸

• A

• B

• C

• D

Tags

CCSS.8.EE.A.3

The mass of one mole of an element is equal to

• the number of protons

• 6.022 x 10²³ grams

• its atomic mass from the periodic table, in grams.

• its atomic number from the periodic table, in grams.

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt?

• Setup A

• Setup B

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Which conversion factor should be used to solve the following, "How many moles are in 28 grams of C?"

• 1 mol = 22.4 L

• 1 mol = 12.011 g

• 1 mol = 6.02x10²³ atoms

• more than one

Which would have more atoms?

• 1 mole of Li

• 1 mole of Au

• 1 mole of Si

• None, all have the same number of atoms

Which conversion factor should be used for the following question " How many atoms are there in 4.00 moles of oxygen, O?

• 1 mole = 78.12 g

• 1 mole = 22.4 L

• 1 mole = 6.02x 10²³ atoms

• You need two conversion factors