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AysviL [449]
3 years ago
7

Most polyatomic ions are cations. TRUE FALSE

Chemistry
1 answer:
Ludmilka [50]3 years ago
6 0

The answer is False.

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Explain The element lithium has two common isotopes: Li–6 and Li–7 If the average atomic mass of lithium is 6.94004 u, determine
rosijanka [135]

Answer:

%Li-6 = 5.996% & %Li-7 = 94.004%

Explanation:

let X₁ = Li-6 & X₂ = Li-7 where Xₙ = mole fraction

X₁ + X₂ = 1 => X₁ = 1 - X₂

6·X₁ + 7·X₂ = 6.94004

=> 6(1 - X₂) + 7·X₂ = 6.94004

=> 6 - 6·X₂ + 7·X₂ = 6.94004

=> 6 + X₂ = 6.94004

X₂ = 6.94004 - 6 = 0.94004 => %X₂ = %Li-7 = 94.004%

X₁ = 1.00000 - 0.94004 = 0.05996 => %X₁ = %Li-6 = 5.996%

6 0
2 years ago
Why must living things rely on thousands of catalysts for chemical reactions necessary for life?
Murrr4er [49]
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In addition, speed is everything in the biological world.

Some reactions and their speed relative to other organisms reactions determines who survives and who doesn't, among other aspects of life.

If a plant is slow to photosynthesize and grow in a habitat high in competition for sunlight real estate, other autotrophs will surely take over.
7 0
3 years ago
Read 2 more answers
carbon disulfide is formed by the reaction of coke (carbon) with sulfur dioxide. how many moles of cs2 will be generated if 8.0
DerKrebs [107]
The balanced chemical reaction:

<span>5C + 2SO2 → CS2 + 4CO
</span>
We are given the amount of coke to be used for the reaction. This will be the starting point for the calculations.

8 mol C ( 1 mol CS2 / 5 mol C ) = 1.6 mol CS2
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Why is water (h2o) considered to be a polar molecule?
Klio2033 [76]
A water molecule, because of its shape, is a polar molecule.
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What is the pH of 0.0850 M HNO3?
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