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stiv31 [10]
3 years ago
9

A temperature of –25°C is equivalent to: Question 2 options: 25 K. 248 K. –25 K. 298 K.\

Chemistry
1 answer:
babunello [35]3 years ago
6 0
First, to convert from C to K, add (C+273)=k
So -25+273=248
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Citric acid (H3 C6 H5 O7) is a product of the fermentation of sucrose (C12 H22 O11) in air.
stiks02 [169]

Answer:

960.6175

Explanation:

The balanced equation shows that for every mole of sucrose used, 2 moles of  citric acid are produced.

So 2.5 moles of C12H22O11 will produce 2*2.5 moles of Citric acid.

So 2.5 moles of C23H22O11 will produce 5 moles of Citric Acid.

The next step is to figure out the molar mass of Citric Acid.

There are

Hydrogen: H3 + H5 moles of hydrogen in 1 mole of Citric Acid = 8 mol H

Carbon: 1 mol of Citric Acid has 6 moles of Carbon in it             = 6 mol C

Oxygen: 1 mol of Citric Acid has 7 moles of Oxygen it it              =7 mol O

Hydrogen has  a mass of 1  so Citric Acid has 1 * 8 grams H          8

Carbon has a mass of 12 so Citric Acid has 12 * 6 grams C           72

Oxygen has a mass of 16 so Citric Acid has <u>16 * 7 grams O          112</u>

Total grams for 1 mol Citric Acid                                                     192    

The official published mass of Citric Acid is 192.1235 so because I used rounded numbers I'm a little off. It is important for any chemistry student student to know  where the 192.1235 came from rather than exactly why I'm a little out. Every periodic table lists different masses for each element. If you want a better number, you will have to consult your own periodic table.

1 mol of Citric Acid = 192 grams

5 mols of Citric Acid = x

Cross multiply

1 * x = 5 * 192

x = 960 grams.

If you want to use the published amount then the answer will be 5 * 192.1235 = 960.6175

       

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Sound waves are mechanical waves in which the particles in the medium vibrate in a direction parallel to the direction of energy
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Longitudinal wave is the another name.
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A wave is a disturbance that carries...
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A wave is a disturbance that carries energy from one place to another. Matter is NOT carried with the wave! A wave can move through matter (a medium). If it must have a medium, it is called a mechanical wave.
7 0
3 years ago
List two processes from which it may be concluded that the particles of a gas move continuously.
ziro4ka [17]

Answer:

The two processes maybe:

  • One process can be the spread of smell of perfume . Tge particles of perfume mic in the air and reaches every corner of tge room because they are moving

  • Second can be the smell of food that reaches us in seconds . This case too tells that the aroma of the food particles gets intermixed and come to us .
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4 years ago
Are carboxylic acids of more than 10 carbons more soluble in polar or nonpolar solvents? Explain.
lina2011 [118]

Answer: Non polar solvents

Explanation:

Since with increasing the size of alkyl group hydrophobic nature increases and solubility in polar solvents decreases .

Hence Carboxylic acids with more than 10 carbon atoms, solubility is more in non polar solvents.

8 0
3 years ago
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