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gtnhenbr [62]
3 years ago
9

(c) When a radioactive isotope decays it can produce beta particles.What is a beta particle?​

Chemistry
1 answer:
jekas [21]3 years ago
6 0

Explanation:

Beta particles are of two types - negative beta particles or negatrons and positive beta particles or positrons which are both formed from some nuclear processes within the nucleus.

A negatron is like an orbital electron but it has more energy compared to an orbital electron.

A positron is essentially the same as a negatron except in the charge it carries. A positron carries positive charges.

A beta particle is very light and has much range through matter.

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Calculate the equilibrium constant for each of the reactions at 25 ∘C. 2Fe3+(aq)+3Sn(s)→2Fe(s)+3Sn2+(aq)
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We take activities of Solids and liquids equal 1. The reason is there concentrations not at all change amount of reactant at equilibrium in the reaction. Hence we don't consider concentrations of pure solids and liquids while writing equilibrium constant. So for above reaction, equilibrium constant (K) = [Sn^2 +] ^3 x 1 / [Fe^3+]^2 x 1. Ping me if you have any doubts.
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3 years ago
In developing his periodic table, Mendeleev listed on cards each element's name, atomic mass, and
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B I think is the answer
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Energy must be added to an atom to move a electron from a lower to a higher energy level. This is known as ___________
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Answer:

The excitation energy  

Explanation:

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6 0
4 years ago
Write a balanced half-reaction for the oxidation of chromium ion Cr + 3 to dichromate ion Cr 2 O − 2 7 in basic aqueous solution
SOVA2 [1]

Answer:

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l) + 6 e⁻

Explanation:

In order to balance a half-reaction we use the ion-electron method.

Step 1: Write the half-reaction

Cr³⁺(aq) = Cr₂O₇²⁻(aq)

Step 2: Perform the mass balance, adding H₂O(l) and OH⁻(aq) where appropriate

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l)

Step 3: Perform the electric balance, adding electrons where appropriate

14 OH⁻(aq) + 2 Cr³⁺(aq) = Cr₂O₇²⁻(aq) + 7 H₂O(l) + 6 e⁻

8 0
3 years ago
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<span>You are missing some info. You need the volume of the water vapor. At STP, 1 Liter of gas contains 22.4 moles, so you can find the moles of water vapor once you know the volume of the water vapor in Liters. </span>

<span>Then, mulitply moles of water by 0.667 to find moles of iron (III) hydroxide used. Finally, multiply by the molar mass of iron (III) hydroxide to find the mass in grams.</span>
8 0
4 years ago
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