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Stels [109]
3 years ago
10

Name at least three ways we benefit from scientific advancements in our everyday lives.

Chemistry
1 answer:
mel-nik [20]3 years ago
5 0

Answer:

It will make our life easier.

It helps us organize our daily activities.

This helps our work can be done faster.

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Gold’s natural state has a definite shape and a definite volume. What is gold’s natural state(s)?
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Solid

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First law of Thermodynamics
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Thermal energy is taken from heat sink in higher temperature. A thermal power machine does mechanical energy using part of the heat.

Part of heat taken are given in cold reservoir in lower temperature

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The boiling point elevation of an aqueous sucrose solution is found to be 0.39°C.
SVEN [57.7K]

Answer:

130.4 grams of sucrose, would be needed to dissolve in 500 g of water.

Explanation:

Colligative property of boiling point elevation:

ΔT = Kb . m . i

In this case, i = 1 (sucrose is non electrolytic)

ΔT = Kb . m

0.39°C = 0.512°C/m . m

0.39°C /0.512 m/°C = m

0.762 m (molality means that this moles, are in 1kg of solvent)

If in 1kg of solvent, we have 0.712 moles of sucrose, in 500 g, which is the half, we should have, the hallf of moles, 0.381 moles

Molar mass sucrose = 342.30 g/m

Molar mass . moles = mass

342.30 g/m . 0.381 m = 130.4 g

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4 years ago
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