Answer:
169
Explanation:
Mass number is the number of protons and the number of neutrons combined.
70 + 99 = 169
60 grams are required.
Hope this helped you!
Answer:
B. Corn needs rain to grow, but too much rain is harmful.
B: SO2
S=Sulfur
O=Oxygen
Dioxide if i am correct means 2 oxygen.
so thats one Sulfur and 2 oxygen.
The following are considered to be a homogeneous mixture: vinegar, sugar water and soda pop in a sealed bottle.