Answer:
14.125
Explanation:
If my calculations are right.
- there are 44.0 moles in co2
- +20.0
- which equals 64
- there are 78.125 moles in O2 so just subtract it by 64 which gives you
- 14.125
MOLE CALCULATION
divide the mass of the material by its molar mass. The molar mass of a substance is the mass in grams of one mole of that substance.
Answer:
Molecular mass of BHT is 204,2 g/mol
Explanation:
To answer this question you need to know that Freezing-point depression (A colligative property) is the decrease of the freezing point of a solvent on the addition of a non-volatile solute. The formula is:
ΔT = Kf m
Where ΔT is the freezing point depression (5,5°C - 4,880°C = 0,62°C
Kf that is freezing point molar constant of the solvent (5,065°C/m)
And m that is molality (moles of solute/kg of solvent). Replacing:
Knowing you have 100,0g of solvent ≡ 0,1000 kg:
=<em> 0,01224 moles of solute </em> <em>≡ BHT</em>
As grams of BHT are 2,500, molecular mass of BHT is:
<em>204,2 g/mol</em>
<em></em>
I hope it helps
Answer:
D. 1x10⁻¹¹ M
Explanation:
For any given aqueous solution the<em> following formula</em> is true:
1x10⁻¹⁴ = [H₃O⁺] * [OH⁻]
1x10⁻¹⁴ is the ion-product constant of water, <em>Kw</em>.
We <u>input the given value of [H₃O⁺]</u>:
1x10⁻¹⁴ = 1x10⁻³ * [OH⁻]
And <u>solve for [OH⁻]</u>:
[OH⁻] = 1x10⁻¹¹ M
Thus the correct answer is option D. 1x10⁻¹¹ M.
Answer:
Mg is oxidized and Pb is the oxidizing agent
Explanation:
Answer:
protons and the nucleus
Explanation:
the atomic number represents the number of protons in the atoms nucleus
