If you have exactly 2.00 moles each, of two different substances, then which of the following must be true about the two samples?

If 72.5 grams of calcium metal (Ca) react with 65.0 grams of oxygen gas (O2) in a synthesis reaction, how many grams of the excess reactant will be left over when the reaction is complete?

Addition of water to an alkyne gives a keto-enol tautomer product. draw an enol that is in equilibrium with the given ketone.

Is zinc oxide a chemical or physical change when heated?

Which property is better explained by the band theory than by the sea of electrons model? ductility thermal conductivity luster electrical conductivity

What is your displacement if you walk 80 m north, 15 m east, 20 m south, 35 m west, and then 60 m south?

Which describes the volume of 1 mol of gas at standard temperature and pressure? ER The volume is greater for a larger mass of gas. The volume is the same for any gas. The volume depends on the size of the container.

When studying historical geology, which type of rock provides the most useful evidence for uncovering what occurred? metamorphic igneous basalt igneous granite sedimentary

Calculate the molar solubility of ca (io3) 2 in each solution below. the ksp of calcium iodate is7.1 * 10-7.

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.07 m by 3.00 m by 3.77 m? Answer in units of kg.

A gas made up of atoms escapes through a pinhole 0.155 times as fast as h2 gas. write the chemical formula of the gas.