How many molecules are in a 189g sample of carbon tetra bromide, CBr4?

about 3.4 × 10²³

Explanation:

CBr⁴ 's molar mass is : 331.63 gr/mol

so 189gr of it means : 189/331.63 = 0.56 mol of CBr4

as we know each mole approximately contains

6.022 × 10²³ molecules

0.56 × 6.022 × 10²³ = 3.3723 × 10²³

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation:

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8