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AlladinOne [14]
3 years ago
14

Element that has two isotopes has an average atomic mass of 199.7. if 75.56% of the atoms of the element have an atomic mass of

197.4, what is the atomic mass of the other isotope?
Chemistry
1 answer:
Klio2033 [76]3 years ago
5 0
I just learned this myself and it was sort of confusing to me. Inbox me and I'll do my best to explain it.
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The mass number of 3 isotopes of magnesium are 24,25,26.what is the mass number of the most abundant isotope of magnesium.​
Anarel [89]

Answer:

24.4 amu or g/mole

Explanation:

24 x 0.790 = 19.0 amu

25 x 0.100 = 2.50 amu

26 x 0.110 = 2.86 amu

(Because of the 19.0, the sig figs go only to the 1/10 decimal place)

19.0 + 2.5 + 2.9 = 24.4 amu or g/mole

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Which formula represents a polar molecule
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Answer:

the formula that represents a polar molecule is NH3 the 3 is small and toward the bottom

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What is 1 mol / 66.04g ​
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Answer:

15.142338 mol/kg

Explanation:

(1 mole) / (66.04 grams)

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Which has a greater amount of particles, 1.00 mole of hydrogen (H) or 1.00 moles of oxygen(0)?
Bas_tet [7]

Answer:

Both have the same amount of particles.

Explanation:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ particles.

This implies that 1 mole of Hydrogen contains 6.02×10²³ particles. Also, 1 mole of oxygen contains 6.02×10²³ particles.

Thus, 1 mole of Hydrogen and 1 mole of oxygen contains the same number of particles.

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3 years ago
Omg I’ve been stressing for the past minutes can someone please help me
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Answer:

I think it would be the last answer

Explanation:

5 0
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