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Nitella [24]
2 years ago
12

How should you measure the mass of a given powdered substance??

Chemistry
1 answer:
Lelu [443]2 years ago
6 0
To measure the mass of a given powdered substance do the following:
1. Zero the weighing balance, that is, put the weigh balance at zero mark.
2. Put an empty weighing paper on the balance and take its reading. Record it as X1.
3. Use spatula to put the powder you want to measure on the weighing paper on the balance. Take your reading and record it as X2.
The mass of the powered is X2 - X1.
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Write a balanced half-reaction describing the oxidation of solid chromium to aqueous chromium(IV) cations.
Pachacha [2.7K]

Answer:

Cr(s) ⟶ Cr⁴⁺(aq) + 4e⁻  

Explanation:

1. Write the skeleton half-reaction

Cr(s) ⟶ Cr⁴⁺(aq)

2. Balance charge

Add electrons to the side that needs them.

You have 4+ on the right and 0 on the left. You must add 4e⁻ to the right to balance the charge.

Cr(s) ⟶ Cr⁴⁺(aq) + 4e⁻

7 0
2 years ago
What are the 5 principles of kinetic molecular theory?
leva [86]
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I got this from my notes from my chemistry class last semester

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8 0
3 years ago
How moles are in 45.7g of CH3?
miskamm [114]

first find the atomic weight of CH3 which would be

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then find the moles in the given mass

36.32 ÷ 45.7 = 0.794

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2 years ago
What is the predominant intermolecular force in CBr4
vovikov84 [41]
CBr4 is a symmetric tetrahedral molecule so it will be non-polar.
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Where is most of the mass found in an atom
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massive livand that sarah or someone is how u do it
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