Chemical formula gives a representation of the number of atoms that each element in a compound or molecule. In this question which is asking to give the formula of hexaboron tetrabromide, the hexa means 6 while the tetra means four.

Since the number of atoms of each element is written as a prefix before the main element, this means that the chemical formula of hexaboron tetrabromide will be B6Br4.

6 0

2 years ago

2.3 moles of CaBr2 contains how many molecules

kkurt [141]

Avogadro's law states that in every mole of a substance, there are $6.022 \times 10^{23}$ molecules.

This means that in 2.3 moles, there are $2.3(6.022 \times 10^{23})=\boxed{1.4 \times 10^{24} \text{ (to 2 sf)}}$

7 0

1 year ago