Author: Anonymous

What is the empirical formula of a compound consisting of 85.6% C and 14.4% H by mass?

When the equation below is properly balanced with the smallest set of whole numbers, the coefficient in front of O2 is __________. NH3 + O2   → NO  +  H2O2  

How many moles of iron (Fe) are in 88.63 g of Fe3O4 (molar mass: 231.53 g/mol)?

What is the formula of an oxide of an alkali metal (M)?

How many low pairs are on the central atom in BrF4+?

Which of the following is true when a solution is diluted? I. The amount of solute remains the same. II. The concentration of the solution decreases.

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

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

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?