Review for Chem (SN and Mole intro)

Which number is in correct scientific notation?

• 55.9 x 10 ⁹

• 6.02²³

• 7.22 x 10 ^-3

• 0.44 x 10 ²

Which is the correct standard form of the number

3.25 x 10 ⁴

• 325.0000

• 325

• 32500

• 0.000325

True or False

A negative exponent means the number is less than 1

• True

• False

What is the correct scientific notation for the starndard number 0.003?

• 3 x 10 ³

• 3 x 10 ^-3

• 0.3 x 10 ^-2

• 3^-3

What is the correct way to write 900,000 in scientific notation?

• 9 x10 ⁵

• 9 x 10 ^-5

• 9 ⁵

• 9.00000 x 10 ⁵

A mole is a

• temperature

• a way of drawing atoms

• counting unit

• a measurement

1 mol = ______________ particles

• 12

• 500

• 6.02 x 10 ²³

• 1,000,000,000

1 mole of copper has the same number of atoms as

• 1 mole of silver

• 1 mole of hydrogen

• 1 mole bromine

• all of these

6.02 x 10 ²³ is also called

• Avogadro's number

• Dalton's Constant

• Einstein's number

• Golden ratio

A sample has 2.3 x 10 ²² atoms big. it is

• More than 1 mole

• Less than 1 mole

• exactly 1 mole