Which statement about reaction rates is true? (a)changing the temperature cannot speed up a reaction rate. (b)changing the amount of reactants will not change the reaction rate. (c)changing the surface area affects the reaction rate. (d)a catalyst slows down the reaction rate.

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

What is the subscript for oxygen in its molecular formula

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?