Sodium chloride (table salt) is

a. element

b. atom

c. electron

d. molecule

Malik formed a hypotheses that an increase in atmospheric oxygen levels by 10% would cause red-legged grasshoppers to grow larger than normal. Suppose that malik performs an experiment to test his hypothesis.

What approximate percentage of the Earth's freshwater is groundwater? a. 10% b. 20% c. 30% d. 40%

At 25C, K = 0.090 for the reaction:H2O (g) + Cl2O (g) 2HOCl (g) Calculate the concentrations of all species at equilibrium for eachof the following cases: (a) 1.0g H2O and 2.0g Cl2O are mixed in a1.0-L flask. (b) 1.0 mol pure HOCl is placed in a 2.

In the reaction ___h2+n2 - >2 NH3, what coefficient should be placed in front of H2 to balance the reaction?

Ammonia (NH3 (g), AH = - 46.19 kJ/mol) reacts with hydrogen chloride (HCl (g), AH = - 92.30 kJ/mol) to form ammonium chloride (NH4Cl (s), AH = - 314.4 kJ/mol) according to this equation: NH3 (g) + HCl (9) ► NH4Cl (s) What is AHxn for this reaction?

FeCl3 (aq) + Na3PO4 (aq) - - > FePO4 (s) + NaCl (aq) [unbalanced]

How many 3d electrons are in an atom of each element? fe express your answer as an integer?

What functional group of aspirin causes it to irritate the stomach?

Scrubbers in smoke stacks remove large amounts of what major air pollutant? a. carbon dioxide b. sulfur oxides c. nitric acid d. sodium oxides e. mercury

Three characteristics of metals are