Answer:
During chemical reactions are broken and to form new substances with different properties, but mass is still .
When there is a transfer of heat a wind usually blows from where the heat is transferred from
Metals are placed in one spot,the nonmetals are placed in another spot,And lastly the metalloids are seperated
The flavoring is what seems to appeal to underage users and it’s what makes vaping seem harmless
Answer:
669,600,000MPH
divide 1,339,200,000 by two, since that's for two hours
You get
669,600,000MPH