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3 years ago

Which of the following statements is true about the composition of the atmosphere?

Chemistry

2 answers:

tigry1 [53]3 years ago

4 0

The answer is 100% D

Please give me brainiest i'm striving for the next rank

Phoenix [80]3 years ago

3 0

Answer : Option D) The atmospheric conditions vary as one changes latitude and altitude.

Explanation : The composition of the atmosphere varies according to the latitude and altitude because of the unequal heating of the earth surface at different latitudes and altitudes which results into atmospheric changes. It also creates different regions and zones.

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What mass of anhydrous copper (II) sulfate can be obtained by the heating of 125.00 grams of copper (II) sulfate pentahydrate?

RSB [31]

Answer:

79.91 g

Explanation:

First we calculate the number of moles of 125.00 grams of copper (II) sulfate pentahydrate (CuSO₄·5H₂O), using its molar mass:

Molar Mass of CuSO₄·5H₂O = (Molar Mass of CuSO₄) + 5*(Molar Mass of H₂O)

Molar Mass of CuSO₄·5H₂O = 249.68 g/mol

moles CuSO₄·5H₂O = 125.00 g ÷ 249.68 g/mol = 0.501 mol CuSO₄·5H₂O

In the reaction, CuSO₄·5H₂O turns into CuSO₄.

So now we convert 0.501 moles of CuSO₄ (anhydrous copper (II) sulfate) into grams, using the molar mass of CuSO₄:

0.501 mol CuSO₄ * 159.609 g/mol = 79.91 g CuSO₄

4 0

3 years ago

A tank with a height of 100 feet and a constant cross sectional area of 10 ft has a constant input flow of 15 ft /hour of pulp s

kiruha [24]

Answer:

(a) The consistency as a function of time is C=0.15*t.

(b) The tank will become clogged in 24 minutes.

Explanation:

The rate of accumulation of the pulp stock can be defined as

$\frac{dC}{dt}=Q_{i}*C_{i}-Q_{o}*C_{o}$

In this case, Co is 0, because the exit flow is only water and 0% fiber.

$frac{dC}{dt}=Q_{i}*C_{i}-Q_{o}*0=Q_{i}*C_{i}$

Rearranging adn integrating

$dC = (Q_{i}*C_{i})dt\\\int dC = \int (Q_{i}*C_{i})dt\\C=(Q_{i}*C_{i})*t+constant$

At t=0, C=0,

$C=(Q_{i}*C_{i})*t+constant\\0=(Q_{i}*C_{i})*0+constant\\0=constant\\\\C=(Q_{i}*C_{i})*t$

$C=(15*0.01)*t=0.15*t$

(b) The time at when the concentration reaches 6% is 0.4 hours or 24 minutes.

$C=0.15*t\\0.06=0.15*t\\t=0.06/0.15=0.4$

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7 0

3 years ago

Which of the following is NOT the same as 13.6 milliliters?

rjkz [21]

HI There!

Which of the following is NOT the same as 13.6 milliliters?- 0.0136 dkL
- 0.0136 L
- 0.136 dL

Answer:0.0136 dkL

4 0

3 years ago

I only have 3 questions left for this, please help!!!!

kakasveta [241]

X is girl, and y is boy, they are formed by fission.

6 0

3 years ago

Read 2 more answers

Once ____________ bonds form between every fourth amino acid in a polypeptide chain, the chain begins to twist into the ________

AlladinOne [14]

Once hydrogen bonds form between every fourth amino acid in a polypeptide chain, the chain begins to twist into the secondary structure known as a(n) alpha helix.

<h3>What is Amino Acid ? </h3>

Amino acids are organic compound. Amino acids contains amine and carboxyl functional group. Amino acids is the building block of life these are the molecules that combine to form proteins.

<h3>What is Polypeptide Chain ? </h3>

A unique sequence of amino acids joined by peptide bonds is called polypeptide.

Thus from the above conclusion we can say that Once hydrogen bonds form between every fourth amino acid in a polypeptide chain, the chain begins to twist into the secondary structure known as a(n) alpha helix.

Learn more about the Amino acids here: brainly.com/question/2526971

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5 0

2 years ago