chem final review - chapter 6

which of the following statements about the mole is FALSE?

• one mole of water contains 1/2 mole of oxygen atoms

• one mole of atoms makes up an amount of atoms that can be seen with the naked eye

• a mole of a monoatomic element corresponds to one Avogadro's number of atoms

• one mole of water contains 1/2 mole of oxygen atoms

one mole of boron has a mass of ________ g.

• 6.022 * 10²³

• 5

• 9.012

• 10.811

how many atoms are in 1.50 moles of fluorine gas?

• 1.81 * 10²⁴

• 9.03 * 10²³

• 18.98

• 6.022 * 10²³

what is the mass in grams of 5.40 moles of lithium?

• 1.29

• 37.5

• 3.25 * 10²⁴

• 6.94

what is mass of 0.560 moles of chlorine gas?

• 127

• 63.3

• 39.7

• 19.9

you have 10.0 g each of Na, C, Pb, Cu and Ne. which contains the largest number of moles?

• Pb

• Ne

• Na

• C

how many moles are there in 17.5 grams of sodium?

• 22.99

• 1.31

• 0.761

• 1.05 * 10²⁵

how many moles of bromine gas are in 37.7 grams?

• 3.01 * 10³

• 207.2

• 0.236

• 79.9

how many hydrogen atoms are in 35.0 grams of hydrogen gas?

• 2.09 * 10²⁵

• 1.05 * 10²⁵

• 2.12 * 10²⁵

• 4.25 * 10²⁵

how many moles of Pb are in 4.71 * 10 x²¹ Pb atoms?

• 6.022 * 10²³

• 2.84 * 10⁴⁵

• 207.2

• 0.00782