How many moles in 1.10 g of hydrogen?

Question

my question is since hydrogen is diatomic do i use a molar mass of 2.something or 1.something?

Answer 1

a mole is answered in atoms unless it's a molecule and not an element that's listed.  also, remember significant figures matter. so if the question is just like you listed it (1.10g), 1.09 moles is correct.

Answer 2

no. of moles = given mass/ molar mass

                      = 1.1/1

                      = 1.1 moles

Answer 3

1.1g H x 1M of H/1.008g H= 1.09 moles

Answer 4

gas is diatomic so just use 1, unless the question say hydrogen gas  hence the answer would be 1.10 moles in 1.10 g of hydrogen