4. Who was the first person to walk on the Moon?

Right anwser gets marked brainliest newton's discovery concerning how fast an object will change speed is the: 1st law 2nd law 3rd law universal gravitation

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.