Given the balanced equation:

2C + 3H2==> C2H6

What is the total number of moles of C that must completely react to produce 2.0 moles of C2H6?

(1) 1.0 mol (3) 3.0 mol

(2) 2.0 mol (4) 4.0 mol

One mole of liquid water and one mole of solid water have different (1) masses (2) properties (3) empirical formulas (4) gram-formula masses

As ph increases what happens to the hydrogen-ion concentration

The motions of your digestive system digest food and ___. a. CiliaB. Mucus c. Pathogens d. Acids

What's the name for the part of earth made of rock

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common? A) O, C, N, Na B) C, H, Ca, Cl C) O, C, H, N D) C, N, Ca, S E) O, C, P, S

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.