Calculate the enthalpy change, δh, for the process in which 14.5g of water is converted from liquid at 10.5∘c to vapor at 25.0∘c .

for water, δhvap = 44.0kj/mol at 25.0∘c and cs = 4.18 j/(g⋅∘c) for h2o(l).

Contrast how pollination is different among gymnosperms and angiosperms.

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?