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Andreas93 [3]
4 years ago
5

Aluminum has a specific heat capacity of 0.902 J/g °C. How much energy is released when 1.0 kg

Chemistry
1 answer:
Ghella [55]4 years ago
8 0

Answer:

The energy released is 13.53j

Explanation:

Q = Mc∆temp.

Q = energy

M = mass

c = specific heat capacity

∆temp. = change in temperature

Q = 1 x 0.902 x (35 - 20)

Q = 0.902 x 15 = 13.53j

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There’s a part two for this but I can’t fit it all in this image, if you know how to do this please help me out. I’m stuck on th
Alina [70]

Answer:

See explanation

Explanation:

According to the law of conservation of mass; the total mass of reactants on the left hand side of the reaction equation is equal to the total mass of products on the right hand side of the reaction equation.

Hence, the total mass of each atom on either side of the reaction equation should be exactly the same.

Since there are two atoms of oxygen on the reactants side, the total mass of oxygen = 16 amu * 2 = 32 amu

Since there are two oxygen atoms on the products side, total mass of oxygen = 16 amu * 2 = 32 amu

8 0
3 years ago
how many grams of fertilizer , for potassium sulfate are there in 42.3 mole of potassium sulfate? step by step
Over [174]

Answer:

The mass of 42.3 moles of potassium sulfate is 7,371.1557 grams

Explanation:

Potassium sulfate K₂SO₄ which is also known as sulphate of potash is a water soluble common component of fertilizer

The molar mass of potassium sulfate, M = 174.259 g/mol

The given number of moles of potassium sulfate, n = 42.3 moles

The mass, 'm', of a given number of moles of potassium sulfate, 'n', is given as follows;

m = n × M

Therefore, we have;

The mass, 'm', of 42.3 moles of potassium sulfate is found by plugging in the values for 'M', and 'n', in the above equation as follows;

m = 42.3 moles × 174.259 g/mol = 7,371.1557 grams

The mass of 42.3 moles of potassium sulfate, m = 7,371.1557 grams.

4 0
3 years ago
What are the casues of global warming?​
zhannawk [14.2K]

Answer:  Carbon emissions

Explanation:  Mankind is creating excessive carbon emissions with his factories and machines.

8 0
3 years ago
3- a) write the formula unit of calcium fluoride.
zvonat [6]

Answer:

a) CaF₂.

b) 7.81g of CaF₂ are present.

Explanation:

a) The calcium ion has as charge Ca²⁺ and fluoride ion is F⁻, that means formula unit is:

CaF₂

b) 1 molecule of CaF₂ contains 2 anions, F⁻. Thus, the moles of CaF₂ is:

1.2x10²³ anions * (1 moleculeCaF₂ / 2 anions) = 6x10²² molecules of CaF₂

6.022x10²³ molecules = 1mol:

6x10²² molecules of CaF₂ * (1mol / 6.022x10²³molecules) = 0.10 moles CaF₂.

1 mole of CaF₂ has a mass of 78.07g:

0.10 moles CaF₂ * (78.07g / mol) =

7.81g of CaF₂ are present

5 0
3 years ago
What is the oxidation number (charge) of nitrogen?
Goshia [24]
The common oxidation numbers for nitrogen is 5, 3, and -3 since it isn’t all that apply. it will most likely be -3.
5 0
3 years ago
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