A reaction in which oxidation numbers change is the answer! :D
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SO3+H2O-->H2SO4
If you need their states
SO3(g) + H2O(l) --> H2SO4(aq)
And they're already balanced
Answer:
1.70
Explanation:
The molar mass of perchloric acid is 100.46 g/mol. The moles corresponding to 484 mg (0.484 g) are:
0.484 g × (1 mol/100.46 g) = 4.82 × 10⁻³ mol
4.82 × 10⁻³ moles are dissolved in 240 mL (0.240 L) of solution. The molar concentration of perchloric acid is:
4.82 × 10⁻³ mol/0.240 L = 0.0201 M
Perchloric acid is a strong monoprotic acid, that is, it dissociates completely, so [H⁺] = 0.0201 M.
The pH is:
pH = -log [H⁺] = -log 0.0201 = 1.70
The answer for the following problem is mentioned below.
- <u><em>Therefore 148.125 × 10^-23 molecules of the cabon monoxide gas is produced.</em></u>
Explanation:
Given:
mass of the oxygen gas = 395 grams
We know;
For the production of the carbon monoxide;
The equation is,
Before balancing the equation;
C +
→ CO
After balancing the equation;
2 C +
→ 2 CO
where,
C = carbon molecule
O = oxygen molecule
CO = carbon monoxide
For the equation,
32 grams of oxygen gas → 2 × 6.023 × 10^-23 molecules
395 grams of oxygen gas → ?
= 
= 148.125 × 10^-23 molecules of the carbon monoxide
<u><em>Therefore 148.125 × 10^-23 molecules of the cabon monoxide gas is produced.</em></u>