Answer:
27.216 mg/h.
Explanation:
First you need to convert 100 lb to kg, and there are 45.36 kg, she will receive 10 mcg/kg/min so if you multiply it by 45.36 kg, she will receive 453.6 mcg/min, so in one hour (60 minutes) she will receive 27216 mcg/h, 1000 mcg are 1 mg, so she will receive 27.216 mg/h.
I believe the answer is E.
Answer:
Explanation:
Ba(s) + Mn²⁺ (aq,1M) → Ba²⁺ (aq,1M) + Mn(s)
Ba⁺²(aq) +2e → Ba(s) , E° = −2.90 V
Mn⁺²(aq) +2e → Mn(s), E⁰ =0.80 V
Anode reaction :
Ba(s) → Ba⁺²(aq) +2e E° = −2.90 V
Cathode reaction :
Mn⁺²(aq) +2e → Mn(s) E⁰ =0.80 V
Cell potential = Ecathode - Eanode
Ecell = .80 - ( - 2.90 )
Ecell = 3.7 V .
equilibrium constant ( K ) :
Ecell = .059 log K / n
n = 2
3.7 = .059 log K / 2
log K = 125.42
K = 2.63 x 10¹²⁵ .
Free energy change :
ΔG = - n F Ecell
= - 2 x 96500 x 3.7
= 714100 J
= 7.141 x 10⁵ J .
Answer:
Van't Hoff factor is 2, in the sodium chloride
Explanation:
Let's raise the dissociations
- Ca₃(PO₄)₂ → 3Ca²⁺ + 2PO₄⁻³
We have 5 moles of ions
We have 4 moles of ions
We have 3 moles of ions
We have 2 moles of ions
Answer:
n = 9
Explanation:
Given parameters:
Molar mass of Na₂SO₄.nH₂O = 304.04gmol⁻¹
Solution
To find the hydration number n, we simply express atomic masses of the atoms in the compound as equal to the given molar mass.
Atomic mass of Na = 23g
S = 32g
O = 16g
H = 1g
Molar mass of the compound is evaluated as:
2(23) + 32 + 4(16) + n[2(1) + 16] = 304.04
46 + 32 + 64 + 18n = 304.04
142 + 18n = 304.04
18n = 304.04 - 142
18n = 162.04
n = 9