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2 years ago

N which city did the united states first drop the atomic bomb?

1 answer:

7 0

I believe it was Hiroshima. Followed by Nagasaki. Moscow was never bombed in my knowledge, and Auschwitz was a death camp, so it wasn't bombed.

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What type(s) of atoms make up the element carbon?

ivolga24 [154]

A, as carbon is an atomic substance - element

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3 years ago

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Solute and solvent of C12H22O11

nasty-shy [4]

Answer:

sugar is the solute and water is the solvent

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3 years ago

Elements found in the same periods of the modern periodic table are _____.

Dennis_Churaev [7]

Try C I’m sorry if you get it wrong but I’m like 90% sure

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2 years ago

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(a) The student dissolves the entire impure sample of CuSO4(s) in enough distilled water to make 100.mL of solution. Then the st

Talja [164]

Answer:

Explanation:

Given parameters :

Volume of solution = 100mL

Absorbance of solution = 0.30

Unknown:

Concentration of CuSO₄ in the solution = ?

Solution:

There is relationship between the absorbance and concentration of a solution. They are directly proportional to one another.

A graph of absorbance against concentration gives a value of 0.15M at an absorbance of 0.30.

The concentration is 0.15M

Also, we can use: Beer-Lambert's law;

A = ε mC l

where εm is the molar extinction coefficient

C is the concentration

l is the path length

Since the εm is not given and assuming path length is 1;

Then we solve for the concentration.

3 0

3 years ago

Dung dịch nào sau đây chỉ chứa các ion (bỏ qua sự điện li của nước, các chất điện li mạnh phân li hoàn toàn)?

LenKa [72]

Answer:

Dung dịch nào sau đây chỉ chứa các ion (bỏ qua sự điện li của nước, các chất điện li mạnh phân li hoàn toàn)?

A. HBr, Na2S, Mg(OH)2, Na2CO3.

B. H2SO4, NaOH, NaCl, HF.

C. HNO3, H2SO4, KOH, K2SiO3.

D. Ca(OH)2, KOH, CH3COOH, NaCl.

8 0

3 years ago