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liubo4ka [24]
2 years ago
13

Is sugar a compound or a mixture?

Chemistry
2 answers:
pogonyaev2 years ago
5 0

Compound, since it is not mixed with anything.

i just took tests on chemicals and elements, and i remember this.

puteri [66]2 years ago
3 0

Answer:

compound

Explanation:

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Sav [38]

Answer:

pinto beans!!

Explanation:

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Two aqueous solutions are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?
svlad2 [7]

Answer:

The Na_{2}CO_{3} solution has a higher osmotic pressure and higher boiling point than LiCl solution.

Explanation:

As concentrations of two aqueous solutions are same therefore we can write:

                                \Delta P\propto i , \Delta T_{b}\propto i and \pi \propto i

where \Delta P, \Delta T_{b} and \pi are lowering of vapor pressure, elevation in boiling point and osmotic pressure of solution respectively. i is van't hoff factor.

i = total number of ions generated from dissolution of one molecule of a substance (for strong electrolyte).

Here both Na_{2}CO_{3} and LiCl are strong electrolytes.

So, i(Na_{2}CO_{3})=3 and i(LiCl)=2

Hence, lowering of vapor pressure, elevation in boiling point and osmotic pressure will be higher for Na_{2}CO_{3} solution.

Therefore the Na_{2}CO_{3} solution has a higher osmotic pressure and higher boiling point than LiCl solution.

7 0
3 years ago
A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down me
attashe74 [19]
<h3>Answer:</h3>

63 years

Eighth

The number of half lives

<h3>Explanation:</h3>

It will take 63 years for half of the sample to decay

In 189 years, eighth of the sample will be left

Scientists can figure out how old a sample is by multiplying the number of half lives by the length of the half life.

Half life is the time taken by a radioactive sample to decay to half of the original amount.

Therefore, for a radioactive element with a half-life of 63 years, it will take 63 years for the sample to decay to half of the original amount.

After 189 years, only an eighth of the sample will be left.

That is, 189 years is equivalent to 3 half-lives

Therefore, if the original amount is 1, then;

1 → 0.5 → 0.25 → 0.125

Thus, scientists can figure out how old a sample is by multiplying the number of half lives by the length of the half life.

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How many protons are there in boron 1
nikdorinn [45]

There are 5 protons in Boron 1.

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3 years ago
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