Answer:
OH⁻ = 1.05×10⁻¹³ M
Explanation:
Given data;
H₃O⁺ = 9.61×10⁻² M
OH⁻ = ?
Solution:
First of all we will calculate the pH.
pH = -log [H⁺]
pH = -log [H₃O⁺]
Because pH is also the hydronium ion concentration.
pH = -log [ 9.61×10⁻²]
pH = 1.02
It is known that,
pH + pOH = 14
1.02 + pOH = 14
pOH = 14 - 1.02
pOH = 12.98
Concentration of OH⁻.
pOH = -log [OH⁻]
12.98 = -log [OH⁻]
OH⁻ = 10∧-12.98
OH⁻ = 1.05×10⁻¹³ M
Consider: a scientific inference is an idea or conclusion that is drawn from evidence and reasoning. In other words, it is an educated guess based on information you already know.
Answer:
Use a commercially produced charcoalfilter
Explanation:
Water found in streams, depressions and ground water must be contaminated with pathogenic microorganisms. The methods of disinfection using iodine or bleach or boiling the water for about two minutes and then filtering it with a clean cloth will effectively remove the microorganisms.
However, charcoal filters do not eliminate microorganisms from water hence this method is not acceptable in this case.
Answer:
0.625 moles of CO₂ can be produced by this reaction.
27.5 g of CO₂
Explanation:
A reaction where CO₂ can be produced is combustion.
The reactants are methane (in this case) and oxygen, while the products will be CO₂ and H₂O.
The balanced reaction is: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)
We assume the oxygen is in excess, so the methane gas, is the limiting reagent.
We convert the mass to moles (mass / molar mass) → 10 g / 16 g/mol = 0.625 moles
According to stoichiometry, 1 mol of methane can produce 1 mol of CO₂. Therefore If we have 0.625 moles of CH₄ we produce 0.625 moles of CO₂. Ratio is 1:1.
Let's convert the moles to mass → (mol . molar mass) =
0.625 mol . 44 g/mol = 27.5 g
Answer:
1 and 2
Explanation:
Venus has no atmosphere, meaning there is no oxygen and we could not breathe, so we would die in a matter of minutes.
Also, the temperature of Venus is extremely hot, so we would burn to death extremely quickly.