Is concrete a homogenous or heterogenous mixture?

If 1.50 μg of CO and 6.80 μg of H2 were added to a reaction vessel, and the reaction went to completion, how many gas particles would there be in the reaction vessel assuming no gas particles dissolve into the methanol?

What piece of lab equipment would you use to conduct a small chemical experiment? Erlenmeyer flask test tube graduated cylinder Beaker

Consider the following reaction at 25 °C: 4Fe (s) + 3O2 (g) ⇌ 2Fe2O3 (s) An equilibrium mixture contains 1.0 mol Fe, 1.0 * 10-3 mol O2, and 2.0 mol of Fe2O3 all in a 2.0 L container. Calculate the value of K for this reaction.

Samples of f2 gas and xe gas are mixed in a container of fixed volume. the initial partial pressure of the f2 gas is 8.0 atmospheres and that of the xe gas is 1.7 atmospheres.

Which pair of elements will form a covalent bond? A. hydrogen and chlorine B. sodium and chlorine C. copper and bromine D. zinc and bromine

The radioactivity due to carbon-14 measured in a piece of a wooden casket from an ancient burial site was found to produce 20 counts per minute from a given sample, whereas the same amount of carbon from a piece of living wood produced 160 counts

How do the amino acids lysine and alanine combine to form a dipeptide?

Does an oxygen atom form two covalent bonds?

In CCl4 is there a certain length that the main atom Carbon is a certain distance from the Chlorine's?

A mechanic repaired 28 cars and 46 trucks last month. He spent 2.5 hours repairing each of these vehicles. Which equation can be used to find h, the total number of hours the mechanic spent repairing these vehicles?