I mix 30 grams of a solid, 30 grams of another solid, and 5 milliliter of water together in a sealed container. A chemical reaction takes place. What do you expect the mass to be after the reaction? Why?

If the mass of 293nv is 293.10 amu and that of 295nv is 295.45 amu, what is the atomic weight of nv?

Which statement about the law of conser- vation of mass is NOT true? A) The mass of reactants must equal the mass of products. B) All the atoms on the reactant side of an equation are also on the product side.

What keeps an inflated balloon from falling down?

What is the poh of an aqueous solution at 25.0 °c that contains 1.35 * 10-8 m hydroxide ion?

Compare and contrast the two kinds of chemical bonds (ionic and covalent)

Which two bases pair with each other?

What is the main cause of increased erosion

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).