Answer: B
Explanation:
There is an atom of one type of element and then two atoms of another type of element.
Answer:
2
Explanation:
At the constant temp, the substance is going from a solid to a liquid and both are present (like melting ice)
The answer is stationary bc between those two times the car is not moving as seen by the flat line
1500 cm^3 ; 1 mL equals 1 cm^3