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bekas [8.4K]
3 years ago
5

You mix 145 grams of water with 200 grams of ethanol to make a solution. What is the solute and what is the solvent?

Chemistry
1 answer:
hodyreva [135]3 years ago
7 0

The greater amount is the solvent and the lesser amount is the solute.

Hence ethanol(200g) which is the greater amount is the solvent here.

And water (145g) which is lesser is the solute here.

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____ 26. what is the weight percentage of nitrogen in urea, cn2h4o
Paraphin [41]
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100

From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of hydrogen = 1 grams
molecular mass of oxygen = 16 grams

therefore:
mass of nitrogen in urea = 2(14) = 28 grams
mass of urea = 12 + 2(14) + 4(1) + 16 = 60 grams

Substitute with the masses in the equation to get the percentage:
weight percentage of nitrogen = (28/60) x 100 = 46.667%
7 0
3 years ago
Which of the following is equal to 5,800,000,000 cm?
Reil [10]

Answer:

It would be 5.8 times 10^9cm

6 0
3 years ago
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Lana71 [14]

Answer:

(4) All atoms of a given element must have the same atomic number

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

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8 0
3 years ago
50 g of liquid water is frozen in an ice cube tray. What is the total weight of all of the ice cubes
Fantom [35]
Answer: 50 grams

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6 0
2 years ago
Why should you cover the container during chromatography?
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