The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds

How many calories are required to heat 867 g of water from 13°c to 87°c?

There are three groups that contain carbon but are not organic compounds: •carbon chlorides •carbon oxides •carbon iodides •carbides •carbonates

Explain the connection between a codon and an amino acid

How does earth atmosphere affect the motion of a meteroid

Using the following values of pKb, select the strongest acid from those listed in the answers. a. C5H5N (pKb = 8.75) b. N2H4 (pKb = 5.77) c. C6H5NH2 (pKb = 9.37) d. NH3 (pKb = 4.75) e. C2H5NH2 (pKb = 3.19)

Which statements describe abiotic factors in an environment?

A ball rolling across the ground in Death Valley will slow and eventually stop. Why? - the ball's kinetic energy evaporates. - the ball's force is destroyed. - the friction of the ball changed the force to negative ions.

Calculate ∆h0 for the following reaction. br2 ( g. → br2 (l) ∆hf0 br2 ( g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)

Ethyl alcohol has a latent heat of vaporization of 850 J/g. Water has a latent heat of vaporization of 2260 J/g. Container A contains 1.0 kg of ethyl alcohol. Container B contains 1.0 kg of water. Both liquids are brought to a boil.

The greatest composition by mass in an atom 17/8 O is due to the total mass of its