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3 years ago

Which has the greater density: 100 kg of ice or 10 kg of gold? Explain why.

Chemistry

1 answer:

ss7ja [257]3 years ago

7 0

10kg of gold is more denser than 100 kg of ice .

<u>Explanation: </u>

Density of a substance purely depends upon the mass and its volume occupied in the system.

In the above statement it is a comparison made between 100kg of ice vs 10kg of gold.

Density of ice in general is 0.920 $\frac{g}{c m^{3}}$ and Density of gold in general is 19.3 $\frac{g}{c m^{3}}$

So if we calculate for 100kg of ice,

Density=100×0.920=92 $\frac{kg}{c m^{3}}$

Similarly we can calculate for 10kg of gold we get

Density=10×19.13=191.3 $\frac{kg}{c m^{3}}$

If we compare the above two values we can say that

Density of 10kg gold has greater value than the Density of 100kg water.

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Why do new moons parallel the path of the sun?

alexdok [17]

It turns out the plane in which the moon moves is related to the plane of earth's orbit around the sun.

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3 years ago

5K + KNO3 ------ 3K2O + N

masya89 [10]

Answer:

174,957.143 grams of potassium and 89,228.478 grams of potassium nitrate will be needed.

Explanation:

$5K +KNO_3\rightarrow 3K_2O + N$

Mass of nitrogen = 27 lbs = 12,247 g

1 lbs = 453.592 g

Moles of nitrogen = $\frac{12,247 g}{14 g/mol}=874.786 mol$

According to reaction, 1 mole of nitrogen is produced from 5 moles of potassium and 1 mole of potassium nitrate.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{5}{1}\times 874.786 mol=4,373.928 mol$ of potassium.

Then 874.786 mol of nitrogen will be obtained from :

$\frac{1}{1}\times 874.786 mol=874.789 mol$ of potassium nitrate.

Mass of 4,373.928 moles of potassium:

$4,373.928 mol\times 40 g/mol=174,957.143 g$ of potassium

Mass of 874.789 moles of potassium nitrate:

$874.789 mol\times 102 g/mol=89,228.478 g$ of potassium nitrate

3 0

3 years ago

The nucleus of a Helium atom has a charge equal to twice the proton's charge. Let FN denote the magnitude of the force the Heliu

pshichka [43]

FN = Fe

Explanation:

Although the charge aren't the same, it should be equal to the magnitude of the forces. The coulomb force governs between both the nucleus and the electron, which is equal to the charge element.

The FN and Fe magnitudes somehow have to be equal, because the ordering does not apply in the multiplication.

There is a much more specific explanation, however, for such powers to be equivalent: they are the relationship pair of the third law of Newton, which has the same in scale and the direction opposite .

5 0

3 years ago

Drag each quantity to the correct location on the table. Complete the table of bond energies and bond lengths. 125 pm 145 pm 167

stiv31 [10]

Answer: N-N: 145 pm and 167 KJ/mol

N=N: 125 pm, 418 KJ/mol

And N2: 110 pm , 942 KJ/mol

Explanation: Bond length is inversily proportional to bond energy.

Greater the bond length , smaller the bond energy and vice-versa.

7 0

3 years ago

Calculate Rations. A transformer has ten turns of wire on the input side and 50 turns of wire on the output side. if the input v

Illusion [34]

Answer:

Output voltage = 600 V

Explanation:

Using the transformer equation which simply states that the ratio of the secondary to primary voltages in a transformer equals the ratio of the number of loops in their coils.

Number of input turns/Number of output turns = Voltage of input/voltage of output

10/50 = 120V/voltage of output

Voltage of output = 120 V/0.2

Voltage of output = 600 V

4 0

4 years ago