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vfiekz [6]
2 years ago
15

Astronomers think planets formed from interstellar dust and gases that clumped together in a process called _____. A. stellar ev

olution B. nebular aggregation C. planetary accretion D. nuclear fusion
Chemistry
1 answer:
Akimi4 [234]2 years ago
6 0
Your answer is stellar evolution
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A 12.5 g sample of granite initially at 82.0 oc is immersed into 25.0 g of water that is initially at 22.0 oc. what is the final
Paraphin [41]

The amount of heat lost by granite is equal to the amount of heat gained by water. Therefore their change in enthalpies must be equal. The opposite in sign means that one is gaining while the other is losing

ΔH granite = - ΔH water

ΔH is the change in enthalpy experienced by a closed object as it undergoes change in energy. This is expressed mathematically as,

ΔH = m Cp (T2 – T1)

Given this information, we can say that:

12.5 g * 0.790 J / g ˚C * (T2 – 82 ˚C) = - 25.0 g * 4.18 J / g ˚C * (T2 – 22 ˚C)

9.875 (T2 – 82) = 104.5 (22 – T2)

9.875 T2 – 809.75 = 2299 – 104.5 T2

114.375 T2 = 3108.75

T2 = 27.18 ˚C

The temperature of 2 objects after reaching thermal equilibrium is 27.18 ˚<span>C.</span>

7 0
3 years ago
Why is it correct to say seawater is a mixture.
ZanzabumX [31]
It's a mixture of H2O + a soluble substance like, salt.
7 0
3 years ago
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Who believed that a grain of sand could be divided indefinitely?
Ilya [14]

Answer:

Democritus

Explanation:

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3 years ago
Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the suga
il63 [147K]
Maple syrup would be categorized under solutions. As it contains sugar which is very soluble in water, it dissolves completely in water depending on its solubility at that temperature making it impossible for the components to be filtered out. A solution is a homogeneous mixture.
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3 years ago
I need help please!Perform the following conversion. Make sure your answer has the correct number of significant digits.
Nuetrik [128]

Answer:

3220000

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