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3 years ago

Question 1 of 10

Chemistry

1 answer:

frozen [14]3 years ago

7 0

Answer:

A. Convert the 200 mol of water to kilograms of water.

Explanation:

To find the molality of 10mol of NaCl in 200mol of water, convert the 200mol of water to kilograms of water.

Molality is one of the several ways of measuring concentration of a solute in a solvent;

Molality = $\frac{number of moles of solute}{mass of solvent}$

To solve this problem, simply convert the 200mole to mass of water.

You might be interested in

How many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction? 4 KNO3(s) → 2 K2O(s) + 2

Leya [2.2K]

Answer:

0.725 mol

Explanation:

Moles are calculated as the given mass divided by the molecular mass.

i.e. ,

moles = ( mass / molecular mass )

since,

mass of KNO₃ = 58.6 g ( given )

Molecular mass of KNO₃ = 101 g / mol

Therefore,

moles of KNO₃ = 58.6 g / 101 g / mol

moles of KNO₃ = 0.58 mol

From the balanced reaction ,

4 KNO₃ (s) ---> 2K₂O (s) + 2N₂ (g) + 5O₂ (g)

By the decomposition of 4 mol of KNO₃ , 5 mol of O₂ are formed ,

hence, unitary method is used as,

1 mol of KNO₃ gives 5 / 4 mol O₂

Therefore,

0.58 mol of KNO₃ , gives , 5 / 4 * 0.58 mol of O₂

Solving,

0.58 mol of KNO₃ , gives , 0.725 mol of O₂

Therefore,

58.6g of KNO₃ gives 0.725 mol of O₂.

3 0

3 years ago

Show the difference between a saturated hydrocarbon and an unsaturated hydrocarbon.

harkovskaia [24]

Saturated hydrocarbons consists of C-C single bond whereas Unsaturated hydrocarbons consists C-C double/triple bond.

4 0

3 years ago

What is a form of potential energy that is due to relative positions of the particles within a materials.

Salsk061 [2.6K]

I think is D I hope it helped :)

4 0

3 years ago

The highest tides occur when:

Stels [109]

Answer:

the moon is full or

Explanation:

4 0

3 years ago

At their centers, all the jovian planets have cores made of:

Paul [167]

Answer:

The core of Jupiter and Saturn is made up of rock,metal and hydrogen compounds, while the core of Uranus and Neptune is made up of rock,metals,water, methane, and ammonia.

Explanation:

The Jovian planets include, Jupiter, Saturn, Uranus, and Neptune. These planets when compared to terrestrial planets are small, with dense cores and surrounded by layers of gas.

5 0

3 years ago