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just olya [345]
3 years ago
6

A student makes a cross-section clay model to represent the internal structure of a volcano that leads to the formation of two r

ocks (X and Y). The student records the processes that
affect the type of rock that is formed in a table,
volcano
aboveground
underground
K
Process
1
2
3
Details
rate of cooling of the rock
composition of the rock
pressure exerted on the rock
Which process(es) cause(s) the rock formed at location X to be different from the rock formed at location Y?
1 only
2 only
• 1 and 3
Activate Windows
Go to Settings to activate Windows.
2 and 3
Tas PM

Chemistry
1 answer:
Murrr4er [49]3 years ago
6 0

CAnswer:

Explanation:

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A 5.098 mass % aqueous solution of potassium hydroxide has a density of 1.05 g/mL. Calculate the molality of the solution. Give
GarryVolchara [31]

<u>Answer:</u> The molarity of solution is 0.954 M

<u>Explanation:</u>

We are given:

5.098 mass % solution of potassium hydroxide

This means that 5.098 grams of potassium hydroxide is present in 100 grams of solution

To calculate volume of a substance, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of solution = 1.05 g/mL

Mass of solution = 100 g

Putting values in above equation, we get:

1.05g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{100g}{1.05g/mL}=95.24mL

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of potassium hydroxide = 5.098 g

Molar mass of potassium hydroxide = 56.1 g/mol

Volume of solution = 95.24 mL

Putting values in above equation, we get:

\text{Molarity of solution}=\frac{5.098\times 1000}{56.1\times 95.24}\\\\\text{Molarity of solution}=0.954M

Hence, the molarity of solution is 0.954 M

7 0
4 years ago
The number of ATPs per NADH generated by the electron transport system is higher than the number generated per FADH2 because ___
photoshop1234 [79]

Answer:

FADH2 has a lower (less negative) redox potential than NADH does

Explanation:

Flavin Adenine Dinucleotide (FAD) and Nicotinamide Adenine Dinucleotide (NAD) are redox cofactors that play important functions for mitochondrial activity and cellular redox balance. Both coenzymes exist in two forms: an oxidized and a reduced, which are abbreviated as NAD/FAD and NADH/FADH2, respectively. These reduced forms (NADH and FADH2) are produced in the Krebs cycle during respiration. FADH2 has lower redox potential than NADH because FADH2 is only capable of activating 2 proton pumps, while NADH can activate 3 proton pumps during the electron transport chain, thereby FADH2 generates a minor number of ATP molecules than NADH.

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4 years ago
One way to increase the rate of a reaction occurring in solution is to stir the solution. How does this increase the rate of the
riadik2000 [5.3K]
<span>A. It increases the number of collisions between molecules.

I hope this helps :)</span>
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3 years ago
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positive ions are smaller than the ions from which they are formed but negative ions are larger than the is from which they are
Vadim26 [7]
Positive ions are atoms that have lost an electron from its outtermost shell. It is positive because electrons are negative and the loss of something negative makes it a bit more positive.
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