Answer:
Chewing in the mouth breaks food into small pieces.
Explanation:
Hope this is one of the answer choices!
9,353 - 1,095 - 5,217 = mN
3,041 = mN
H:C:N= 1,095/1 : 5,217/12 : 3,041/14
H:C:N = 1,095 : 0,43475 : 0,2172
H:C:N = 5,037 : 1,99985 : 0,99912 ≈ 5 : 2 : 1
H₅C₂N (C₂H₅N)
Answer:
pH = 12.90
Explanation:
The TSP is in equilibrium with water as follows:
Na₃PO₄(aq) + H₂O(l) ⇄ Na₂HPO₄⁻Na⁺(aq) + OH⁻(aq)
<em>Where Kb = 0.0208 is defined as:</em>
Kb = 0.0208 = [Na₂HPO₄⁻Na⁺] [OH⁻] / [Na₃PO₄]
As both Na₂HPO₄⁻Na⁺ OH⁻ comes from the same equilibrium:
[Na₂HPO₄⁻Na⁺] = [OH⁻] = X
[Na₃PO₄] is -molar mass: 163.94g/mol:
50.0g * (1mol / 163.94g) =0.305moles / 1L =
0.305M
Replacing:
0.0208 = [X] [X] / [0.305M]
6.344x10⁻³ = X²
0.0796M = X = [OH⁻]
As pOH = -log [OH⁻]
pOH = 1.099
pH = 14 - pOH
<h3>pH = 12.90</h3>
⁴₂He
- 2 protons
- 2 electrons
- 2 neutrons
Answer:the first one is D second one is A and the third one is A :D
Explanation:
