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4 years ago

Compare mechanical energy and thermal energy.

Chemistry

1 answer:

Nat2105 [25]4 years ago

8 0

Answer:

Explanation:

Mechanical and thermal energy are both different forms of energy. They can be converted from one to another. Some systems relies solely on this form of energy conversion between these types of interactions.

Mechanical energy is a form of energy that is due to the motion of a body.

Thermal energy is due to the temperature changes between bodies.

Both forms of energy are not related but they can be converted from one from to anther.

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the pH of a solution is a measure of the acidity or alkalinity of a solution. Water has a pH of 7 and, in general, acids have a

Sliva [168]

Answer:

7.1

Explanation:

equation to calculate pH is

$pH=-Log_{10}(a_{H^+})=-Log_{10}(8*10^-8) = -Log_{10}(8)-Log_{10}(10^{-8})=-0.9+8=7.1$

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3 years ago

Workout the formula for: Magnesium Bromide Potassium Chloride

madam [21]

Magnesium bromide= MgBr2
Potassium chloride= KCl

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3 years ago

1 point

levacccp [35]

Answer:

A pure substance has a definite chemical composition

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3 years ago

Balance the following chemical equation by providing the correct coefficients HBr+Ba(OH)2 ———— BaBr2+H2O

stealth61 [152]

Answer:

2HBr + Ba(OH)2 = BaBr2 + 2H20

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3 years ago

You have 15.42g of C2H6. How many moles of H2O can be made?

Amiraneli [1.4K]

Answer: The moles of water produced are 1.54 moles.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of ethane = 15.42 g

Molar mass of ethane = 30.07 g/mol

Putting values in above equation, we get:

$\text{Moles of ethane}=\frac{15.42g}{30.07g/mol}=0.513mol$

The chemical equation for the combustion of ethane follows:

$2C_2H_6+5O_2\rightarrow 4CO2+6H_2O$

By Stoichiometry of the reaction:

2 moles of ethane produces 6 moles of water

So, 0.513 moles of ethane will produce = $\frac{6}{2}\times 0.513=1.54mol$ of water

Hence, the moles of water produced are 1.54 moles.

4 0

4 years ago