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3 years ago

Why does sugar sink to the bottom of a tea cup?

Chemistry

2 answers:

Mandarinka [93]3 years ago

4 0

Because it is more dense than the water or tea.

miskamm [114]3 years ago

4 0

Answer:

The tea (solution) is hot, this means that the solution molecules are moving in a fast rate. This results in gaps being present between the solution molecules, when the sugar (solute) is added its molecules can fit in between the gaps making its way down the containers with ease.
Solubility is directly proportional to temperature, thus an increase in temperature (of the solution) will result in an increase in solubility (of the solute).

Explanation:

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Reason the Carbon Cycle is necessary to sustain life on Earth

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Most living things on Earth are made of carbon.

Living things need carbon in order to live, grow, and reproduce.

Carbon is a finite resource that cycles through the Earth in many forms.

This makes carbon available to living organisms and remains in balance with other chemical reactions in the atmosphere and in bodies of water like ponds and oceans.

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3 years ago

Write the Rate Law

Ivanshal [37]

As we know that rate law expression is

$r = k { |a| }^{2} { |b| }^{2}$

(a)

$r = k { |o2| }^{1} { |no2| }^{2}$

(b)

$r = k { |cl2| }^{1}$

(c)

$r = k { |chcl3|}^{1} { |cl2| }^{1}$

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5 0

3 years ago

A constant-volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of heat in 0.200 L of solution

Dmitrij [34]

Answer:

The change in internal energy is - 1.19 kJ

Explanation:

Step 1: Data given

Heat released = 3.5 kJ

Volume calorimeter = 0.200 L

Heat release results in a 7.32 °C

Temperature rise for the next experiment = 2.49 °C

Step 2: Calculate Ccalorimeter

Qcal = ccal * ΔT ⇒ 3.50 kJ = Ccal *7.32 °C

Ccal = 3.50 kJ /7.32 °C = 0.478 kJ/°C

Step 3: Calculate energy released

Qcal = 0.478 kJ/°C *2.49 °C = 1.19 kJ

Step 4: Calculate change in internal energy

ΔU = Q + W W = 0 (no expansion)

Qreac = -Qcal = - 1.19 kJ

ΔU = - 1.19 kJ

The change in internal energy is - 1.19 kJ

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3 years ago

True or False ? Endothermic reactions are characterized by net absorption of thermal energy from its surroundings which leads to

Artemon [7]

False

Signed by Virtuoso

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3 years ago

Consider X + Z -> ?

Licemer1 [7]

Answer:

Explanation:

Element Z acquires two electrons from element X for stability

4 0

3 years ago