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3 years ago

Why is it important to separate material from mixture?

Chemistry

1 answer:

Contact [7]3 years ago

4 0

Answer:

Explanation:

Mixtures are impure substances with the following properties:

Their composition is indefinite i.e they consisit of two or more elements or compounds in any proportion by mass.
Their constituents retains their identity i.e physical properties are retained.
They can easily be seperated by physical methods into their constituents.

It is important to seperate materials from mixtures because mixtures do not undergo chemical changes when they combine. This implies that they can easily be seperated using simple seperation techniques with the constituents still retaining their properties.

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How many moles are present 560.0 g of iron (lll) sulfate

xxMikexx [17]

Answer:

1.400 mol

Explanation:

To convert grams to moles, you will need the molar mass. The molar mass of iron(iii) sulfate is 399.88 g/mol. Divide grams by the molar mass to find moles.

(560.0 g)/(399.88 g/mol) = 1.400 mol

There are 1.400 mol present in 560.0 g of iron(iii) sulfate.

3 0

4 years ago

How many moles are in 1.2×10^3 grams of ammonia

yuradex [85]

Ammonia is NH3. The molar mass of NH3 is 17.0307g.

(1.2*10^3)/17.0307=70.46 moles of NH3.

If you are using significant figures, it is 70. moles of NH3.

6 0

3 years ago

Calculate the mass of 6.9 moles of nitrous acid (HNO2). Explain the process or show your work by including all values used to de

AlexFokin [52]

Answer:- 324.3 grams.

Solution:- We have been given with 6.0 moles of nitrous acid and asked to calculate it's grams. Moles to grams is a unit conversion and for doing this conversion we multiply the given moles by the molar mass of the compound.

Molar mass is the formula mass and to calculate this the atomic masses of each atom are multiplied by their respective subscripts that is the number of the atom in the compound .

For example, $NO_2$ has one nitrogen atom and one oxygen atom. So, the molar mass of this is = atomic mass of N + 2(atomic mass of O)

= 14 + 2(16)

= 14 + 32

= 46 gram per mol

gram per mol is the unit of molar mass. So, the molar mass of $NO_2$ is 46 grams per mol.

Let's calculate the molar mass of nitrous acid using the same concept.

molar mass of [ $HNO_2$ = 1 + 14 + 2(16)

= 1 + 14 + 32

= 47 grams per mol

Now, 6.9 moles of nitrous acid could easily be converted to grams as:

$6.9molHNO_2(\frac{47g}{1mol})$

= 324.3 g

Hence, the mass of 6.9 moles of nitrous acid is 324.3 grams.

6 0

3 years ago

A pendulum has 721 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom o

Sloan [31]

Answer:

721 J

Step-by-step explanation:

At the bottom of its swing, all the potential energy of the pendulum has been converted to kinetic energy.

KE = 721 J

8 0

3 years ago

Read 2 more answers

I need help please!!! Name the parts making up the female part of the flower and state what each part does. Please use your own

Greeley [361]

<h2>Answer:-</h2>

The female part is the pistil. The pistil usually is located in the center of the flower and is made up of three parts: the stigma, style, and ovary. The stigma is the sticky knob at the top of the pistil. It is attached to the long, tubelike structure called the style.

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3 years ago