Ground water is:

O stored in porous soil and rock

o part of the nitrogen cycle

O reduced by respiration

O unavailable to plants

Determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days

Identify the type of chemical reaction. H2CO3 H2O + CO2

Explain how scientific study is always an ongoing process

For the reaction x2 + y + z → xy + xz, it is found that doubling the concentration of x2 doubles the reaction rate, tripling the concentration of y triples the rate, and doubling the concentration of z has no effect.

An aqueous solution contains the following ions: Cl-, K+, Mg{2+}, NO3{-}, SO4{2-}. Is a precipitate likely to form? If so, giv ethe formula of the precipitate. A. MgSO4 B. MgCl2 C. K2SO4 D. No precipitate will form.

Which are components of cell theory? Check all that apply. All living things are made of cells. Cells are the basic unit of structure and function of all living things. All cells come from other cells. All cells come from nonliving matter.

Suppose you wanted to heat a mug of water (178 mL) from room temperature 10 °C to 52 °C to make a cup of tea. How much energy (in units of joules) would you need from your microwave? (Cwater=4.184 J/g˚C)

How do you describe an Ionic Bond?

Calculate molality of a 2m aq solution of sodium chloride with density 1.35g/mol

One important factor in any chemical synthesis is the actual quantity of desired product obtained compared to the theoretical amount predicted on the basis of the stoichiometry of the reaction.