Which pure substance is made of only one kind of atom?

A. An element

B. Am electron

C. A particle

D. A proton

The equation for the complete combustion of methane is ch4 (g) + 2o2 (g) → co2 (g) + 2h2o (l) to calculate the number of grams of co2 produced by the reaction of 29.5 g of ch4 with o2, the first conversion factor to use is

How many grams of water are required to produce 5.50L of hydrogen gas at 25.0 degrees C and 755mmHg?

Calculate the molarity of a solution containing 50.0g of CaBr2 in a 750.0mL solution?

how many atoms of carbon are represented in 3CH3CH20

A very small equilibrium constant means ... a. an equal amount of reactants and products c. more products b. more reactants d. system isn't at equilibrium

Gases are unique because it is the only phase that can be compressed can flow is composed of moving particles cannot be compressed

In a crystal lattice of an ionic compound, A. Kind of a given charge are clustered together B. Ions are surrounded by ions of the opposite charge C. A sea of electrons surrounds the ions D. Neutral molecules are present

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters? a. 1.5 moles b. 2 moles c. 3 moles d. 6 moles

The chemical symbol for sodium is A. N. B. S. C. Na. D. Sn.

What is the pressure of a mixture of co2, so2, and h2o gasses, if each gas has a partial pressure of 25 kpa?