1. 0.45 grams of potassium carbonate was mixed with 0.30 g of an unknown substance. What is the total mass of the mixture?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?