Ethene (C2H4), a hydrocarbon, is burned in an excess of oxygen to form products. What is the sum of the coefficients of the balanced chemical equation?

Calculate the number of moles of water molecules in 25.0 g of water, H2O.

An atom of the ion 90Sr2+ has:

Which has the condensed formula C3H6O3?

The number 0.000402 expressed in exponential notation is:

Which is the correct formula for ammonium sulfite?

This is the line structure of a common molecule: What is the condensed formula?

A carboxylic acid has a formula mass of 88 amu and a percent composition (by mass) of 54.5 % C, 9.09 % H, and 36.4 % O. Determine the molecular formula of this acid.

Convert 62 °F to Kelvin. [K = °C + 273; °F = (1.8 × °C) + 32]

What is the concentration of an aqueous ethanol solution if 400 mL of that solution is diluted to 4.00 L to yield a concentration of 0.0400 M?