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zlopas [31]
4 years ago
11

What is the difference between potassium 39, 41, and 40

Chemistry
1 answer:
Snezhnost [94]4 years ago
4 0
They have a different number of neutrons.

Explanation: All isotopes of Potassium have the same number of protons, and potassium 39, 41, and 40 have atomic mass of 39 amu, 41 amu, and 40 amu respectively. Atomic mass is made of protons and neutrons so each isotope has a different number of neutrons.
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What is formed when atoms of elements combine?
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When atoms of an element combine they form a A-Compound

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The picture (below) shows the formula for ___________.
Stella [2.4K]

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What is the oxidation state of S in so ??​
Marina86 [1]

Answer:

+2

Explanation:

If a compound SO existed, we would identify the oxidation state of sulfur using the following logic:

  • oxygen is more electronegative than sulfur, so it's more electron-withdrawing and it should have a negative oxidation state producing a positive oxidation state for sulfur;
  • oxygen typically has an oxidation state of -2;
  • we may then apply the fact that SO is expected to be a molecule with a net charge of 0;
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6 0
3 years ago
35.0 grams of nitrogen gas reacts with 60.0 grams of hydrogen gas: N2 + 3H2--> 2NH3
Misha Larkins [42]

Explanation:

Moles of N2 = 35.0g / (28g/mol) = 1.25mol

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Since 1.25mol * 3 < 30.0mol, nitrogen is limiting.

Moles of NH3 = 1.25mol * 2 = 2.50mol.

Mass of NH3 = 2.50mol * (17g/mol) = 42.5g.

30.0mol - 1.25mol * 3 = 26.25mol.

Excess mass of H2

= 26.25mol * (2g/mol) = 52.5g.

6 0
3 years ago
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