Answer:
228.7
Explanation:
According to Boyle's law
P1V1 = P2V2
where P1& P2 are initial and final pressure
and V1& V2 and initial and final volumes respectively.
Given:
P1 = 136atm, P2 = 131.6atm
V1 = 142
; V2 = ?
V2 =
= 
= 146.7
Total volume, V = V1 + V2
=146.7 + 142
<u>= 228.7</u>
<u></u>
Answer:
Six atoms of calcium, four of phosphorous and sixteen of oxygen for a total of twenty six
Explanation:
Hello there!
In this case, according to the molecular formula of the two moles of calcium phosphate:

Thus, in order to calculate the atoms of each atom, it is necessary to multiply the two in front of the formula by the subscripts in the reaction:

Thus, we obtain six atoms of calcium, four of phosphorous and sixteen of oxygen for a total of twenty six.
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Answer:
3.018 x 10⁻⁶ M.
Explanation:
- Co(OH)₂ dissociates in solution according to the equation:
<em>Co(OH)₂ →</em> <em>Co²⁺ + 2OH⁻.</em>
<em></em>
<em>∵ Ksp = [Co²⁺][OH⁻]² = (s)(2s)² = 4s³.</em>
<em />
∴ 4s³ = 1.10 x 10⁻¹⁶.
∴ s³ = 1.10 x 10⁻¹⁶/4 = 2.75 x 10⁻¹⁷.
∴ s = ∛(2.75 x 10⁻¹⁷) = 3.018 x 10⁻⁶ M.