Answer:
I think it's B
Explanation:
apologies if I get this wrong
In a combustion reaction, one of the reactants is always oxygen.
6.023*1023 He atoms=1 mole He
1.23×1024 helium atoms=1.23×1024/6.023*1023 =2.042 mole He
one mole He=4.0 gm
2.042 mole He=2.042*4.0=8.168 gm
answer in grams of Helium is 8.168 gm
Answer:
The answer to your question is: density = 0.5 g/ml
Explanation:
Data
Volume = 10 ml
mass = 5 g
Density = ?
Formula
density = mass / volume
Substitution
density = 5/ 10
density = 0.5 g/ml