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Fiesta28 [93]
3 years ago
6

Isotopes are best described as two atoms of the same element that

Chemistry
1 answer:
Flura [38]3 years ago
7 0

Explanation:

they have different mass number but same atomic number

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A sample of oxygen has a volume of 7.84 mL at a pressure of 71.8 mmHg and a
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3 years ago
Examine the given reaction. NH4NO3(s) → NH4+(aq) + NO3–(aq) ΔH° = 25.45 kJ/mol ΔS° = 108.7 J/mol·K Which of the given is correct
kobusy [5.1K]

Answer:

B)−6,942 J /mol

Explanation:

At constant temperature and pressure, you cand define the change in Gibbs free energy, ΔG, as:

ΔG = ΔH - TΔS

Where ΔH is enthalpy, T absolute temperature and ΔS change in entropy.

Replacing (25°C = 273 + 25 = 298K; 25.45kJ/mol = 25450J/mol):

ΔG = ΔH - TΔS

ΔG = 25450J/mol - 298K×108.7J/molK

ΔG = -6942.6J/mol

Right solution is:

<h3>B)−6,942 J /mol</h3>

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3 years ago
What is an example of an organ A.pancreas B.blood C.insulin D.knee
marissa [1.9K]

Answer: pancreas

Explanation:

4 0
3 years ago
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Alenkinab [10]

Answer:

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5 0
3 years ago
What is the quantity of atoms in KMnO4 ?
tankabanditka [31]

Answer:

Potassium permanganate has a molar mass of 158.04 g/mol. This figure is obtained by adding the individual molar masses of <em><u>four oxygen atoms</u></em>, <em><u>one manganese atom</u></em> and <em><u>one potassium atom</u></em>

Explanation:

6 0
3 years ago
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