How many protons are in the radioactive isotope 10K? 40 19 21 20

Answer
the asnwer is 1 and 4

<span>1) osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant r.

Call: P = osmotic pressure; C = molarity; T = absolute temperature

=> P = C * T * r

2) </span><span>write an equation that will let you calculate the molarity c of this solution. your equation should contain only symbols. be sure you define each symbol other than r. </span><span>

</span>=> C = P / (rT)

Answer: C = P / (rT)

1. When a spring is coiled up or a rubber band is stretched, mechanical energy is stored in it.
2. When the spring uncoils or the rubber band snaps back, this energy is released.
3. This stored mechanical energy is called potential energy because it has the potential to make things happen.

Explanation:

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-2207.4 or
-2.22074x103

Answer:

4Al203 + 9Fe -> 3Fe3O4 + 8Al

Amount of Al on reactant side: 8

Amount of Al on product side: 8

Amount of O on reactant side: 12

Amount of O on product side: 12

Amount of Fe on reactant side: 9

Amount of Fe on product side: 9