What is used to measure the distance of nearby stars?

What is the wavelength of a light frequency 7.21x10^14Hz

Polyatomic ion that is the conjugate acid of ammonia

For the following reaction: Fe2O3 + 3CO - - > 2Fe + 3CO2 how many grams of Fe2O3 is needed to produce 111 g of Fe?

The solubility product constant of calcium hydroxide is 6.5x10-6. if 0.30 mol of sodium hydroxide is added to 2 l of 0.0010m ca (oh) 2, what is the final concentration of the calcium ion? show your work.

1 Which best defines concentration? A ratio that describes the amount of solute divided by the amount of solvent or solution B ratio that describes the amount of solvent or solution divided by the amount of solute C ratio that describes the mass of

PH + pOH = 14. What is the hydroxide concentration of a solution with pH of 8?

A student Increases the temperature of a 417 cubic centimeter balloon from 278 K to 231 K. Assuming constant pressure what should the new volume of the balloon be

What is the molarity of a solution with 1.17 moles of Ca (OH) 2 disolved in 0.2 liters of water? A. 1.17 M B. 0.2 M C. 0.17 M D. 5.85 M

What happens to acetone molecules when you add heat to a beaker of liquid acetone?

An effluent discharge with a flow of 1.5 m3/s and an ammonium-N concentration of 2 mg/L is released to a river with a flow of 12 m3/s and an ammonium-N concentration of 0.015 mg/L.