A chemical reaction takes place in a closed system. The mass of the reactants before the reaction was 35 grams. What must the mass of the products of the reaction be, according to the law of conservation of mass?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Which of the following is not true about the atomic model of substances?

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car