How is the half-life of a radioactive material useful for radioactive dating?

Which of these describes the rate of this chemical reaction? H2 + Cl2 → 2 HCl a. an increase in the concentration of HCl and H2 with time b. an increase in the concentration of HCl with time c. an increase in H2 and Cl2 with time d.

Which equations represent precipitation reactions? More than one can be chosen. A. Na2S + FeBr2 → 2NaBr + FeS B. MgSO4 + CaCl2 → MgCl2 + CaSO4 C. LiOH + NH4I → LiI + NH4OH D. 2NaCl + K2S → Na2S + 2KCl E. AgNO3 + NaCl → AgCl + NaNO3

How can an object weight change on a small planet

What happens when gasoline is used to power a vehicle? A. Energy is neither lost nor gained as it transforms from chemical, to heat, to mechanical energy. B.

418 N force to move a 56 kg mass, at what rate does the object accelerate?

A solution is made by dissolving 25.20 g of aluminum acetate in 185.0 mL of water. What is the concentration of acetate ions?

Which best describes how sediment forms? erosion breaks down rock and other material molten rock cools above earths surface loose material is cemented by pressure chemical changes cause sediment to compact together

How will you know whether a solution is saturated or supersaturated?

What is the number of moles of 27.6g of lithium?

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.