Which of the following is represented in the highest percentage by volume in dry air?

a. Oxygen

b. Carbon dioxide

c. Nitrogen

d. Hydrogen

A compounds empirical formula is CH2. If the formula mass is 28 g/mol, what is the molecular formula

Consider this reaction: 2SO2 (g) + O2 (g) 2SO3 (g) + heat What will happen if more sulfur dioxide gas is added to the reaction mixture? A. The equilibrium will shift to the right. B. The equilibrium will shift to the left. C. Keq will increase. D.

The enthalpy of formation of CO2 at 25oC is - 393.51 kJ/mol. What is the enthalpy of formation at 500 oC?

The drawing shows sodium and chloride ions positioned at the corners of a cube that is part of the crystal structure of sodium chloride (common table salt). the edges of the cube are each 0.281 nm (1 nm = 1 nanometer = 10-9 m) in length.

What is the charge of the ion formed by each of these atoms? o, s, cl, i,

The formula mass of a compound

Suppose the volume of a container is decreased, but the same number of gas molecules is present at the same temperature. What will happen to the molecules? The molecules will increase in number. The molecules will decrease in number.

Zinc metal reacts with hydrochloric acid to produce hydrogen gas and an aqueous solution of zinc (ii) chloride. what is the reducing agent in this reaction? maybe prof. umbridge was right in trying to remove her.

What mass of H2SO4 is contained in 60.00 mL of a 5.85 M solution of sulfuric acid

One isotope has 6 protons and 8 neutrons which reference names this isotope