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tensa zangetsu [6.8K]
3 years ago
6

How are atoms of the same element with different mass numbers called?

Chemistry
1 answer:
ELEN [110]3 years ago
7 0

Answer:

Isotopes

Explanation:

Isotopes are the same element with different masses because of the different number of neutrons. Also, the element doesn't change. If we change the protons, the element will change and then it won't be an isotope. Hope it helps!

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Which parts of sedimentary rock formation include the breakdown and carrying away of existing rock? Check all that apply.
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Weathering and erosion are two processes of which sedimentary rocks are broken down and carry away existing rocks.

Explanation:

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How many moles of electrons must be transferred to plate out 110 g of manganese (MW ~ 55g/mol) from a solution of permanganate (
ololo11 [35]

Answer:

14 mol e⁻

Explanation:

Step 1: Write the balanced half-reaction for the reduction of permanganate to manganese

8 H⁺(aq) + 7 e⁻ + MnO₄⁻(aq) ⇒ Mn(s) + 4 H₂O(l)

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Step 3: Calculate the number of moles of electrons needed to produce 2 moles of Mn

According to the half-reaction, 7 moles of electrons are required to produce 1 mole of Mn.

2 mol Mn × 7 mol e⁻/1 mol Mn = 14 mol e⁻

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