Just use the equation M=DV which means Mass equals Density times Volume. Simply plug your values into the equation to get
M=.789(139) and solve
The answer is D, coal is a nonrenewable resource.
Answer:B
Explanation: A chemical change is something that is irreversible
Answer:
exemples of elements with 1 valence electron: Hydrogen, lithium, potassium.
exemples of elements with 2 valence electrons: magnessium, calcium.
boron has 3 valence electrons. Phosphorus has 5 valence electrons.
carbon has 4 valence electrons.
exemples of elements with 5 valence electrons: Phosphorus, nitrogen
exemples of elements with 7 valence electrons: fluorine, chlorine
exemples of elements with 8 valence electrons: helium, argon
Explanation:
the easiest way to know the number of electrons are by the number of the group so 14 is 4, 16 is 6.
Answer:
a cold front
Explanation:
A warm front brings fog, but a cold front brings clouds that form from dry air. A warm front brings thunderstorms, but a cold front brings widespread snowfall.
