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-BARSIC- [3]
3 years ago
8

How many grams of vanadium, V, would contain the same number of atoms as 32.066 g of sulfur, S?

Chemistry
1 answer:
ollegr [7]3 years ago
7 0
For there to be an equal number of atoms, there must be an equal number of moles.

Moles = mass / Mr

Moles of Sulfur = 32.066 / 32.066
= 1 mole

Mass of one mole of vanadium = 50.942 grams

50.942 grams of vanadium will contain the same number of atoms as 32.066 grams of sulfur.
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What is the net redox reaction that occurs when Au comes into contact with acidic KMnO4? (Use the lowest possible coefficients.
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Answer:

3MnO₄⁻ + 24H⁺ + 5Au → 5Au³⁺ + 3Mn²⁺ + 12H₂O.

Explanation:

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The oxidation reaction: Au → Au³⁺ + 3e.

The reduction reaction: MnO₄⁻ + 8H⁺ + 5e → Mn²⁺ + 4H₂O.

  • To obtain the net redox reaction, we multiply the oxidation reaction by 5 and the reduction reaction by 5 to equalize the no. of electrons in the two-half reactions.

<em>So, the net redox reaction will be:</em>

<em>3MnO₄⁻ + 24H⁺ + 5Au → 5Au³⁺ + 3Mn²⁺ + 12H₂O.</em>

<em></em>

8 0
3 years ago
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One mole of an element contains which of the following?
lapo4ka [179]
B. 6.02 x 10^23 atoms
5 0
2 years ago
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At 25oC, three moles of a gas occupy a volume of 4.0 L at 1.9 kPa. If the volume increases to 12.0 L, what will the new pressure
givi [52]
The answer:
according to Boyle's law concerning Pressure (P), Volume (V), Temperature (T) and number of mole (n) , we have the famous formula:

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let's find the value of Pf
from the equation
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Pf = 1.9*4 / 12 = 0.63

so the answer is <span>B. 0.63 kPa</span>


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3 years ago
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I’m pretty sure the answer is a as you go further down you will be heading towards the core meaning the temperature and will increase and I’m sure that will apply to pressure and density as well
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