How are hail and snow similar?

A. They are solid precipitation that forms in clouds at or below freezing temperatures.
B. They are liquid precipitation that forms at or above freezing temperatures.
C. They fall when there are cirrus clouds in the sky.
D. They require gusts of wind that move the frozen chunks around and cause them to grow larger.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.

State one important difference between a physical change and a chemical change?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?