1 year ago

If you transfer energy into two substances which one would melt first

Chemistry

1 answer:

I am Lyosha [343]1 year ago

4 0

Answer:

The substance with a weaker molecular attraction

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State any two mixture that can separated using the method?

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distillation
fillteration
threshing
evaporation

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3 years ago

How many protons are in an element with an atomic number of 8 and a mass number of 18?

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The answer is 8. atomic number: the number of protons in the nucleus of an atom.

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When a reaction system is at equilibrium: a. there is no more chemistry happening. b. the amounts of reactants and products are

Lapatulllka [165]

Answer: Option (e) is the correct answer.

Explanation:

Equilibrium is defined as the state of a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.

The state of equilibrium is represented by a double sided arrow as " $\rightleftharpoons$ " in a chemical equation.

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Therefore, we can conclude that when a reaction system is at equilibrium then the rates of the reaction in the forward and reverse directions are exactly equal.

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2 years ago

Suppose a tank contains 100 gallons of a solution of 10 lb of salt dissolved in water, which is kept uniform by stirring. Pure

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Answer:

Please see attachment

Explanation:

Please see attachment

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2 years ago

How many kilojoules of heat are released when 32.0 g of NaOH are dissolved in water? (The molar heat of solution of NaOH is –445

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The energy release when dissolving 1 mol of NaOH in water is 445.1 kJ
the mass of NaOH to be dissolved is 32.0 g
The number of NaOH moles in 32.0 g - 32.0 g / 40 g/mol = 0.8 mol
the energy released whilst dissolving 1 mol of NaOH - 445.1 kJ
when dissolving 0.8 mol - the energy released is 445.1 kJ/mol x 0.8 mol
therefore heat released is - 356.08 kJ
answer is -356.08 kJ

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2 years ago

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