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valina [46]
3 years ago
14

A galaxy contains stars, gas, and dust. This matter must be held together or the galaxy will break apart. What is responsible fo

r holding the stars, gas, and dust together in a galaxy?
Chemistry
1 answer:
Marrrta [24]3 years ago
5 0
Gravity is responsible !
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When dissolving a solid or liquid, as the temperature of the solvent increases, the rate of dissolution?
Alinara [238K]

Answer:A. Increases

Explanation:

Heating or an increase in temperature increases the kinetic energy of particles thereby increasing their motion and how they relate and react with one another.

Increase in the temperature of the solvent is directly proportional to the rate of dissolution. The rate of dissolution increases due to the increase in kinetic energy. This makes the solvent particles interact faster with the solute particles thereby increasing the dissolution rate.

7 0
3 years ago
Which measure of a gas does the expression nRT represent? (1 point)
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The Ideal Gas Equation
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7 0
2 years ago
Which statement is true about how scientists draw conclusions from data?
jok3333 [9.3K]
I believe the answer is D.
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How do carrier proteins transport substances across cell membranes?
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7 0
3 years ago
C6H12O6(s) + 6O2(g) --&gt; 6H2O(g) + 6CO2(g)
vredina [299]
One
Balance the Equation.
This has been done for you or it is given. Anyway this step is finished, but it must always be done.

Two
Find the molar mass of C6H12O6
6C = 6 * 12 = 72
12H = 12*1 = 12
CO = 6 * 16 = 96
Mol Mass = 180 grams / mol

Three
Find the mols of C6H12O6
n = ???
Molar Mass = 180 grams / mol
given mass = 13.2 grams.

n = given mass / molar mass
n = 13.2 / 180
n = 0.07333333 mols.

Four
Find the mols CO2
1 mol C6H12O6 will produce 6 mols CO2
0.0733333 mols will produce x

1/0.073333 = 6/x Cross multiply
x = 0.073333 * 6
x = 0.4399 moles.

Five
Find the volume given the conditions for temperature and pressure are STP conditions.
PV = nRT
R = 0.082057 
n = 0.43999
P = 1 atmosphere
T = 0 + 273 = 273
V = ???
1 * V = 0.43999 * 082057 * 273
V = 10.2 L
Answer: B

Note if you give out Brainly awards I'd sure appreciate one. This was a lot of typing


8 0
3 years ago
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