Which statement about entropy is true? o non-spontaneous reactions sometimes will happen all by themselves. o entropy stops when pure substances are in solid state the entropy of the universe is increasing. o during a change of state there is no change in entropy.

Amixture with the same composition throughout is!

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.

What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water