What is the [H+] of a 0.5 M solution of a weak acid with a
Ka = 5 x 10-4.
HA(aq) <—> H+(aq) + A-(aq)

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.