Given the balanced equation representing a reaction:

F2 (g) + H2 (g) = = > 2HF (g)

What is the mole ratio of H2 (g) to HF (g) in this reaction?

(1) 1:1 (3) 2:1

(2) 1:2 (4) 2:3

What is the value of 100°C on the Kelvin scale

A solution of bleach has about 1.5 g of NaOCl dissolved in 220 mL of solution. What is the molarity?

How many molecules are in 2.50 mole of H2O?

What happens if you break a magnet in half? a) Each half will be a new magnet, with both a north and south pole. b) One half will have a north pole only and one half will have a south pole only. c) Neither half will have a pole.

What is a spin quantum number?

If an amino acid contained a hydrocarbon (a group of multiple carbons and hydrogens linked together) as its side group, in which of the following categories could it be appropriately designated? A) hydrophilicB) polar C) nonpolarD) basicE) acidic

Which atom can bond with each other to form chains, rings or networks? (1) carbon atoms (2) hydrogen atoms (3) oxygen atoms (4) nitrogen atoms

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 4p (b) n = 3, l = 1, m1 = + 1 (c) n = 5, l = 3

The ksp of copper (ii) carbonate, cuco3, is 1.4 * 10-10. calculate the solubility of this compound in g/l.

A 1.0857 gram pure sample of a compound containing only carbon, hydrogen, and oxygen was burned in excess oxygen gas. 2.190 g of carbon dioxide and 0.930g of water were produced. Find the empirical formula of the compound.