One molecule of chlorophyll contains 137 atoms. how many of these atoms come from the metal magnesium?

How to do compare and contrast energies

When is equilibrium established in a reversible reaction?

In 1912, chemist fritz haber developed a process that combined nitrogen from the air with hydrogen at high temperatures and pressures to make ammonia.

What is the balanced equation for the copper oxide formation?

Complete and balance the following equation: BrO3 - (aq) + N2H4 (aq) →Br2 (l) + N2 (g) (acidic solution) Express your answer as a net chemical equation including phases.

How does a mixture of benzoic acid and benzaldehyde can be isolated separately by extractions?

What is a compound? a) a combination of two or more substances that are not chemically combined b) a combination of two or more elements that are combined in a certain ratio

A gas has a volume of 75mL at a pressure of 200.0 kPa. What will be the new volume be in mL if the pressure is decreased to 60.0 kPa in sig figs

Give two reasons why it's important to work with a partner in a lab

Suppose you have 3.00*1018 reams of lead (pb). how many lead atoms do you have? express the number of atoms numerically.