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Marat540 [252]
3 years ago
15

Which determine the charge of an atom?

Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

the answer is B its the number of protons and neutrons

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What is the PH of a 7.5x10^-3 M OH solution
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BASE
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Which has the highest boiling point .33 m NH3 or .10 m Na2SO4​
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Answer:

0.33 mol/kg NH₃

Explanation:

Data:

     b(NH₃) = 0.33 mol/kg

b(Na₂SO₄) = 0.10 mol/ kg

Calculations:

The formula for the boiling point elevation ΔTb is

\Delta T_{b} = iK_{b}b

i is the van’t Hoff factor — the number of moles of particles you get from a solute.

(a) For NH₃,

The ammonia is a weak electrolyte, so it exists almost entirely as molecules in solution.  

1 mol NH₃ ⟶  1 mol particles

i ≈ 1, and ib = 1 × 0.33 = 0.33 mol particles per kilogram of water

(b) For Na₂SO₄,

Na₂SO₄(aq) ⟶ 2Na⁺(aq) + 2SO₄²⁻(aq)

1 mol Na₂SO₄ ⟶ 3 mol particles

i = 1 and ib = 3 × 0.10 = 0.30 mol particles per kilogram of water

The NH₃ has more moles of particles, so it has the higher boiling point.

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Answer:

Organic evolution is the theory that more recent types of plants and animals have their origins in other pre-existing forms and that the distinguishable differences between ancestors and descendents are due to modifications in successive generations.

Explanation:

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Answer:

A) Very stable.

Explanation:

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If a basketball travels a distance of 4 meters in 5 seconds, what is its average speed?
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i think d

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