Given that 1 inch (in) = 2.54 cm, 33.8 in2 = ________ cm2

In general, electronegativity ____ down a group and ____ from left to right across a period.

What is the approximate measure of the indicated H-C-C bond angle in the following molecule?

What is the mass of NaNO3 (molar mass: 84.99 g/mol) needed to prepare 500.0 mL of 1.30 M NaNO3 solution?

Assuming ideal behavior, what is the volume occupied by 0.250 mol of air at STP?

The temperature of a 25.0-g block of metal increases from 25.0°C to 469.4°C after it absorbs 10.0 kJ of heat. What’s the specific heat of the metal?

What is the formal charge on the N atom in the following Lewis structure?

In the reaction, Fe (s) +   2 HCl (aq)   →   FeCl2 (aq)  +   H2 (g) _________ is the oxidizing agent.

In the reaction, Fe (s) +   2 HCl (aq)   →   FeCl2 (aq)  +   H2 (g) _________ is the reducing agent.

What is the theoretical yield of Fe2O3 (molar mass: 159.7 g/mol) when 60.0 g of Fe (molar mass: 55.85 g/mol) reacts with excess amount of O2? 4 Fe (s)  +  3 O2 (g)  –> 2 Fe2O3 (s)