<span>Out of the options here, the most suitable units that could be used for representing density would be option c) g/cm. Density is a value for mass (in this case g) divided by a value for volume (in this case cm). Option E, kg/L, would also work.</span>
Answer: The answers are the first and third options.
Answer: 186.3 g of 
will be produced from 2.50 mol of K
Explanation:
The balanced chemical reaction is:
According to stoichiometry :
2 moles of K produce = 2 moles of
Thus 2.50 moles of 
will produce=
of
Mass of 
Thus 186.3 g of will be produced from 2.50 mol of K
Answer:
It's d
Explanation:
They have two different meaning and jobs
I think the correct form of the equation is given as:
a = a0 * (0.9)^t
where t is an exponent of 0.9 since this is an
exponential decay of 1st order reaction
Now to solve for the half life, this is the time t in
which the amount left is half of the original amount, therefore that is when:
a = 0.5 a0
Substituting this into the equation:
0.5 a0 = a0 * (0.9)^t
0.5 = (0.9)^t
Taking the log of both sides:
t log 0.9 = log 0.5
t = log 0.5 / log 0.9
t = 6.58 years
Answer:
half life = 6.58 years
