Answer:
double replacement ...i think ^^
i hopefully its right
Answer:
greenhouse effects are molecules that trap heat on earth atmosphere
Answer:
D
Explanation:
sound waves can not be carried in space
Lar mass of Ca<span> = 40.08 </span>grams/mole 77.4 g Ca<span> * ( 1 </span>mole Ca<span>/ 40.08 ... n = m / M 1mol </span>Ca<span>weights 40 gmol-1 n = 77,4 / 40 = 1.93 </span>mol<span>.</span>