When substances go through chemical changes what happens

In a study of the conversion of methane to other fuels, a chemical engineer mixes gaseous methane and gaseous water in a 0.501 L flask at 1043 K. At equilibrium, the flask contains 0.169 mol of CO gas, 0.257 mol of H2 gas, and 0.255 mol of methane.

Amalia uses two different dietary analysis software programs to determine the vitamin E content of a 1-oz serving of cooked asparagus. She notices the amounts given by the programs are not the same.

Two esters with the empirical formula c3h6o2 may be prepared. write structural formulas for these esters

Some of the formulas below could be either molecular or empirical formulas; however, some could only be molecular formulas. which of the following formulas must be molecular formulas? select all that apply.

Copper has a density of 8.9 g cm3. if you have 90 g of copper how much volume is your occupying?

Crude oil may contain hundreds of different types of hydrocarbons. Some examples include: Butane (C4H10) Dodecane (C12H26) Octane (C8H18) Benzene (C6H6) Many common fuels, such as gasoline and kerosene, are combinations of these substances or others.

What will happen if the concentration of water inside a cell is higher than the concentration of water outside a cell?

During a lab, you heat 1.04 g of a niso4 hydrate over a bunsen burner. after heating, the final mass of the dehydrated compound is 0.61 g. determine the formula of the hydrate and also give the full name of the hydrate.

Which molecule is a source of energy, a store of energy, and can mix with water?

How many atoms will you find in 2.0 moles of he?