The sum of the age of brother and sister is 30

Which describes the oxidizing agent in a chemical reaction

A mixture contains two or more substances that are physically combined and there is no electron bonding

Which statement describes friction? O It is perpendicular to the surfaces that rub together. O It causes a change in motion. O It occurs in the same direction as the push force. O It pulls downward on a moving object.

Why did the outside of the bag get wet? From ice melting in the bag

Adding one proton to the nucleus of an atom

Find the number of moles of water that can be formed if you have 134 mol of hydrogen gas and 62 mol of oxygen gas

The amount of kinetic energy an object has depends on its. motion position gravity height

What is the empirical formula of Fe?

Small beads of iridium-192 are sealed in a plastic tube and inserted through a needle into breast tumors. If an Ir-192 sample has an initial activity of 560 dpm, how much time is required for the activity to drop to 35 dpm (t1/2 = 74 days) ?

Consider the following equation. 2H2 (g) + O2 (g) 2H2O (g); ΔH is negative. Which statement is true? The reaction is endothermic from left to right. Increased pressure would increase the rate of forming water vapor.