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3 years ago

Solutes lower the freezing point of water by:

1 answer:

7 0

Water molecules are constantly moving in Ice they move slower and are more tightly packed together and move at a slower pace to lower the freezing point you would have to find a solute that makes it harder for water to form crystals

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What is the mass of sodium (Na) in 50 grams of table salt (NaCl)? Show your work.

beks73 [17]

Answer:

The amount of sodium in this sample = 32.4 grams

Explanation:

Mass of Sodium = 23 g/mol

Mass of Chlorine = 35.5 g/mol

Mass of NaCl = 35.5 g/mol

Fraction of Na in NaCl = $\frac{23}{35.5}$

=0.648

We are given a sample of 50 grams of sodium chloride.

The amount of sodium in this sample = $Amount of sodium in 1 gram sample \times weight of sample$

The amount of sodium in this sample = $0.648 \times 50$

The amount of sodium in this sample = 32.4 grams

4 0

4 years ago

Which phase has the greatest structure

Dahasolnce [82]

Answer:

The answer is D

Explosion:

it depends on the solid,liquid,gas and the tempcher

6 0

3 years ago

A 21.5 g sample of nickel was treated with excess silver nitrate solution to produce silver metal and nickel(II) nitrate. The re

Arte-miy333 [17]

The mass of nickel is 36.5g metal.

Ni+2AgNO3 → Ni(NO3)2+2Ag

21.5g Ni / 58.69g = 0.366mol Ni

Ag = 107.87

N i= 58.69

But, 2molAg per 1 mol Ni, so, change in mass is more like...

Twice as many moles Ag as Ni, and then the mass relationship is 107.87g Ag / 58.69, but due to the 2Ag: 1Ni mol ratio, the change in mass is like:

107.87(2) / 58.69 = 3.68 times increase

So, the final mass of Ag is 3.68x, and the change in mass of Ni is x

36.5=(21.5-x)+(3.68x)

Solve for x

x=5.597

3.68x=g Ag

3.68(5.597)=20.59

21.5 - x = g Ni after reaction

21.5 - 5.597 = 15.903g Ni

20.59g Ag + 15.903g Ni = 36.5g metal

The mass of nickel is 36.5g metal.

Learn more about reactions here: brainly.com/question/16416932

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7 0

2 years ago

How many oxygen atoms are present in 23.6 grams of aspartame?

olga55 [171]

The formula of aspartame is <span>C14H18N2O5.
From the periodic table:
molecular mass of hydrogen = 1 grams
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of oxygen = 16 grams

This means that:
molar mass of aspartame = 14(12)+18(1)+2(14)+5(16) = 294 grams
Therefore, each 294 grams of aspartame contains 5(16) = 80 grams of oxygen. To know number of grams of oxygen in 23.6 grams of aspartame, simply use cross multiplication as follows:
mass of oxygen = (23.6x80) / 294 = 6.42 grams</span>

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3 years ago

In a scientific experiment, the factor that may change in response to the manipulated variable is called the ______ variable.

Artist 52 [7]

Dependent variable. the independent is non dependent of the variable.

4 0

3 years ago