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user100 [1]
3 years ago
15

lava is a hot liquid rock. when lava flows over solid ground beneath it increases in temperature. what happens to the molecules

in the solid ground when the temperature is increasing?
Chemistry
1 answer:
MatroZZZ [7]3 years ago
7 0

Answer:

Lava is hot liquid rock. When lava flows over solid ground, the solid ground beneath it increases in temperature. What happens to the molecules in the solid ground when the temperature is increasing? The energy of the molecules in the ground decreases.

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Copper (II) Sulfate pentahydrate, CuSO4 X 5H20 is heated in an open crucible to remove the water. (a) Diagram the lab set up cle
balu736 [363]

The water molecules are not completely removed so additional heating is required.

Explanation:

We have the copper (II) sulfate pentehydrate with the chemical formula CuSO₄ · 5H₂O.

molar mass of CuSO₄ · 5H₂O = 159.6 + 5 × 18 = 249.6 g/mole

Knowing this, we devise the following reasoning:

if in       249.6 g of CuSO₄ · 5H₂O there are 90 g of H₂O

then in         8 g of CuSO₄ · 5H₂O there are Y g of H₂O

Y = (8 × 90) / 249.6 = 2.88 g of water

mass of dried CuSO₄ = mass of CuSO₄ · 5H₂O -  mass of H₂O

mass of dried CuSO₄ = 8 - 2.88 = 5.12 g

5.12 g is less that the weighted mass of 6.50 g. We deduce from this that the sample needs additional heating in order to remove all the water (H₂O) molecules.

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6 0
3 years ago
What is an endothermic reaction? what is an endothermic reaction? it is a reaction where there is a net adsorption of energy fro
boyakko [2]
It is a reaction that requires heat as a reactant.
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The OH-ion concentration of a blood sample is
Keith_Richards [23]

Answer:

She okeyy

Explanation:

Example 740 are the think free ofıce pH of the blood 740 blood sample iş takipte kal ❣️

4 0
3 years ago
How many joules of heat energy are absorbed when 50.0 grams of water are heated from 50.0°C to 60.0°C?
Ivahew [28]

<u>Answer:</u>

<em>2090 \ j needed to heat the amount of water giving. </em>

<u>Explanation:</u>

To solve this question we first need to know the specific heat of water which is given by <em>4.18 joules</em> Per gram for increasing <em>1° of  temperature</em>. Now since one gram of water name one joules per gram so 2 grams will need <em>twice of 4.18</em> that is 8.36 similarly 50 grams will need 50 \times 4.18 = 209

Now we need to calculate the heat for 10° of change because temperature rises from 50° centigrade to 60° centigrade and difference in degrees

<em>so heat needed is= 209 \times 10 = 2090 \ j</em>

6 0
3 years ago
What is the attraction between atoms when they react called?
lisabon 2012 [21]

there are a few different types of reactions and they are molecular reactions, compound reactions, atomic reaction, nuclear reaction

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