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Gre4nikov [31]
3 years ago
14

HELP!!!!!!!!!!!When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physi

cal change or a chemical change. Explain your answer.
THANKS!! <3
Chemistry
2 answers:
mezya [45]3 years ago
6 0

Answer:

This is a chemical change because new substances are formed with different properties and identities.

VMariaS [17]3 years ago
5 0
This reaction would be chemical. The reason for this is because the fat is coming in contact with the sodium hydroxide and through a chemical procees something else is formed. In this case it is soap and glycerin. Hope this helps.
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A mixture of 14.0 grams of H2, 84.0 grams of N2, and 64.0 grams of O2 are placed in a flask. The partial pressure of the O2 is 7
Hitman42 [59]

Answer:

P_{tot}=465.27torr

Explanation:

Hello there!

In this case, according to the given information, it will be possible for us to use the Dalton's law, in order to solve this problem. However, we first need to calculate the mole fraction of oxygen by firstly calculating the moles of each gas:

n_{H_2}=\frac{14.0g}{2.02g/mol} =6.93mol\\\\n_{N_2}=\frac{84.0g}{28.02g/mol}=3.00mol\\\\n_{O_2}=\frac{64.0}{16.00g/mol}  =2.00mol

Next, we calculate such mole fraction as follows:

x_{O_2}=\frac{2}{6.93+3+2} =0.168

Then, given the following equation:

P_{O_2}=P_{tot}*x_{O_2}

So we solve for the total pressure as follows:

P_{tot}=\frac{P_{O_2}}{x_{O_2}} \\\\P_{tot}=\frac{78.00torr}{0.168} \\\\P_{tot}=465.27torr

Regards!

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A zinc salt, E when
Naily [24]

Answer:

The salt is Zn(NO3)2

When the residue is allowed to cool, its colour changes from yellow to white

The equation of the reaction is; 2Zn(NO3)2(s) --->2ZnO(s) + 4NO2(g) + O2(g)

Explanation:

Decomposition of Zn(NO3)2 is one of the routes by which ZnO is obtained. ZnO is a white insoluble powder which has a yellow colour when hot and a white colour when cold. It is an amphoteric substance used as a white pigment in paints and as a filler for rubber.

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Also recall that NO2 is a brown gas and oxygen gas rekindles a glowing splint.

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3 0
3 years ago
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What does chemical reaction describe
Flauer [41]
A chemical reaction (signs)

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a physical

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3 years ago
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