How many molecules of methane, CH4, are contained in a 0.900 gram sample? 0.0563

3.39 x 1022

1.26

1.02 x 1023

Item at position 24

MOLAR MASS=12+4

=16 gmol^-1

number of moles=Mass/ molar mass

=0.900g/16gmol^-1

=0.05625 mol

the answer is first option

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements