Answer:
0.111 mol
Explanation:
We can solve this problem by using<em> Avogadro's law</em>, which states that at constant pressure and temperature:
Where in this case:
We <u>input the data given by the problem</u>:
- 150.0 mL * n₂ = 50.0 mL * 0.332 mol
And <u>solve for n₂</u>:
Answer:
38.9%
Explanation:
below, determine the mass percent of Fe3+ in a 0.6450 g sample of iron ore, if 22.40 mL of a 0.1000 M stannous chloride, SnCl2(aq), solution is required to completely react with the Fe3+ present in the ore sample. The chemical equation for the reaction is
2 Fe3+ (aq) + Sn2+ (aq) →2Fe2+ (aq) + Snº+(aq).
O 19.40%
O 6.196%
O 38.79%
O 9.697%
2 Fe3+ (aq) + Sn2+ (aq) →2Fe2+ (aq) + Snº+(aq).ole of Sn2+
for every mole of Sn2+, tere are 2 moles of Fe3+
- 22.4/1000L of 0.1000 M Sn2+ = 22.4 X 0.10/1000 = 0.00224 mole
so there are 0.00224 X 2= 0.00448 moles Fe3+
iron atomic mass is 56
56 X 0.00448 = 0.251 gm Fe3+
so the mass % of the Fe3+ in the 0.645 gm iron ore sample is
(0.251/0.645) X 100 = 38.9%
<span>Moles of aluminum carbonate = Mass / Molar mass
= 47.6 g / 233.99 g molâ’1
=0.203 mol
To find moles of oxygen:
In each mole of the carbonate there are 9 moles of oxygen
And thus there are 9 Ă— 0.203 moles of oxygen in the given quantity.
= 1.83 moles of oxygen
Within one mole of oxygen, we have 6.022 x 10^23 atoms
Amount of atoms within 1.827 moles of oxygen = 1.83 x 6.022 x 10^23
= 1.10 x 10^24 atoms</span>
Answer:
Hello your question is incomplete attached below
A student titrated 50.0mL of a 0.10M solution of a certain weak acid with NaOH(aq). The results are given in the graph above.
answer : pH > 3.5
Explanation:
During the titration before the equivalence point the solution will behave as a buffer system of a weak acid and base ( conjugated )
when pH ~ pka the concentration of weak acid = base ( conjugated ) hence when the pH value crosses the pka value , the concentration of the pH value will drop lower than the value of the conjugated base
hence the pH value ≥ 3.5
Answer:
If i have 2 apples and 6 bannanas how many ansers do i get for 7xy
Explanation:
6.4
