Answer:
Pb oxidation number is +2
C in CH4 is -4. H is +1. 4H + 1C = 0. ; 4(+1) + C = 0 ; C = -4
O is usually -2. 3O = 3(-2) = -6. ; 2Fe =. +6 ; each Fe is +3
2Ag = +2 since O = -2 ; each Ag = +1
Answer:
<u>The temperature difference is</u>
Explanation:
The formula that is to used is :
ΔΔ
<em>where ,</em>
- <em>Δ is the heat supplied in calories = 300cal</em>
- <em> is the mass of water taken = m (assumed)</em>
- <em>Δ is the change in temperature</em>
- <em> is the specific heat of water = </em>
ΔT :
Answer is: <span>the molarity of the diluted solution 0,043 M.
</span>V(NaOH) = 75 mL ÷ 1000 mL/L = 0,075 L.
c(NaOH) = 0,315 M = 0,315 mol/L.
n(NaOH) = c(NaOH) · V(NaOH).
n(NaOH) = 0,075 L · 0,315 mol/L.
n(NaOH) = 0,023625 mol.
V(solution) = 0,475 L + 0,75 L.
c(solution) = 0,023625 mol ÷ 0,550 L.
c(solution) = 0,043 mol/L.
Answer:
I am pretty sure the answer is C.
Explanation: