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3 years ago

When calculating specific heat, what does the variable 'Q' represent?

Chemistry

2 answers:

dlinn [17]3 years ago

7 0

Answer:

Thermal Energy

Explanation:

Educere Founders Education Answer

LekaFEV [45]3 years ago

4 0

Answer:

Heat Energy

Explanation:

Specific heat is the a thermodynamic property of the substances. When we have to raise the temperature of unit mass of a given substance by one degree, the heat we will require for this purpose is known as Specific Heat.

Specific heat is calculated using the following formula which relates the specific heat with Heat Energy and Temperature

$Q=mc$ Δ $T$

Where,

$Q$ = Heat energy,

$m$ = mass of the substance in Kg.,

$c$ = Specific heat, and

Δ $T$ = change in temperature in kelvins.

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A 58.33-g sample of milk of magnesia, Mg(OH)2, always contains 24.31g of magnesium, 32.00g of oxygen, and 2.02g of hydrogen. Fin

ASHA 777 [7]

The mass percentage of each element in the milk of magnesia is, 41.68% Mg, 54.86% Oxygen, and 3.46% Hydrogen elements

Give the total mass of a sample of milk of magnesia Mg(OH)₂ as 58.33 g

We are to calculate the percentage by mass of each element

$\% mass =\frac{mass \ of \ element}{mass \ of \ sample} \times 100$

For Magnesium:

Mass of magnesium = 24.31g

$\% mass \ of \ Mg = \frac{24.31}{58.33} \times 100\\ \% mass \ of \ Mg =\frac{2431}{58.33} \\ \% mass \ of \ Mg = 41.68\%$

For oxygen element:

Mass of oxygen = 32.00g

$\% mass \ of \ O_2 = \frac{32}{58.33} \times 100\\ \% mass \ of \ O_2 =\frac{3200}{58.33} \\ \% mass \ of \ O_2 = 54.86\%$

For the hydrogen element

Mass of hydrogen = 2.02g

$\% mass \ of \ H_2 = \frac{2.02}{58.33} \times 100\\ \% mass \ of \ H_2 =\frac{202}{58.33} \\ \% mass \ of \ H_2 = 3.46\%$

Hence the mass percentage of each element in the milk of magnesia is, 41.68% Mg, 54.86% Oxygen, and 3.46% Hydrogen elements.

Learn more here: brainly.com/question/20065048

5 0

3 years ago

Compare and contrast the compositions of binary ionic and binary molecular compounds

ICE Princess25 [194]

<span>Both are composed of two elements (that means binary).
Ionic is composed of two ions, metallic cation-positive ions, and nonmetallic anion - negative ions. For example NaCl (sodium-chloride).
Molecular compounds are composed of two nonmetallic elements. For example HCl (hydrochloric acid).</span>

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4 years ago

How much (in mL) 12.1 M solution of hydrochloric acid would be required to make 500 mL of a 2.5 M solution

victus00 [196]

Answer:

Volume of the concentrated solution, which is needed is 103.30 mL

Explanation:

Let's apply the formula for dilutions to solve the problem

Conc. Molarity . Conc. volume = Dil. Molarity . Dil volume

12.1 M . Conc. volume = 2.5 M . 500 mL

Conc. volume = (2.5 M . 500 mL) / 12.1M

Conc. volume = 103.30 mL

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4 years ago

What is Zirconium-78 protons and neutrons?

11Alexandr11 [23.1K]

Answer:

Zirconium has 40 protons and 51 neutrons

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3 years ago

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C. I took this test!!

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