a sample of a radioactive isotope decays from 60 mg to 45 mg over the course of 75 days. How long will it take for the sample to decay to 65% of the original amount

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

what are the statements

answer: mole of the gas

answer: mole of the gasexplanation:

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l