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Anvisha [2.4K]
4 years ago
9

explain why ventilation is very important if there is a risk of exposure to radon gas in your home or school

Chemistry
1 answer:
Phantasy [73]4 years ago
5 0
Radon is a colorless, odorless, radioactive gas. It is also a leading cause of lung cancer. Ventilation is essential.
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Which of the following is a heterogeneous mixture?
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8 0
3 years ago
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Name the following ionic compounds: (a) K2Cr2O7, (b) Li2C2O4, (c) CuNO3.
Elis [28]

Answer :

(a) The name of K_2Cr_2O_7 is, potassium dichromate.

(b) The name of Li_2C_2O_4 is, lithium oxalate.

(c) The name of CuNO_3 is, copper nitrate.

Explanation:

Ionic compound : It is a type of compound that is made up of the ions of the two different elements in which one element is a metal and another element is a non-metal.

(a) K_2Cr_2O_7

The given compound K_2Cr_2O_7 is an ionic compound. It is made up of two different ions which are potassium ion (K^+) and dichromate ion (Cr_2O_7^{2-}).

So, the name of K_2Cr_2O_7 is, potassium dichromate.

(b) Li_2C_2O_4

The given compound Li_2C_2O_4 is an ionic compound. It is made up of two different ions which are lithium ion (Li^+) and oxalate ion (C_2O_4^{2-}).

So, the name of Li_2C_2O_4 is, lithium oxalate.

(c) CuNO_3

The given compound CuNO_3 is an ionic compound. It is made up of two different ions which are copper ion (Cu^+) and nitrate ion (NO_3^{-}).

So, the name of CuNO_3 is, copper nitrate.

4 0
3 years ago
Which of the following is true about homogeous mixtures
sergey [27]
Was there supposed to be a picture?
4 0
3 years ago
How many moles of water would you have if you had 3x10^24 molecules of
goldfiish [28.3K]
I am going to be honest i’m good at chemistry but i need the point cause i need help on my history work
5 0
3 years ago
The molal boiling point elevation constant Kb = 1.97 C .Kg.Mol-1 for a certain substance X. When 31.98 g of urea are dissolved i
Ipatiy [6.2K]

Answer:

Boiling point of pure liquid is 135.4°C

Explanation:

The boiling point elevation (Colligative property of solutions) follows the formula:

ΔT = Kb×m×i

<em>ΔT is equal to increase in boiling point (Boililng point solution - boiling point pure liquid), Kb is boiling point elevation constant of the liquid, m is molality of solution and i is Van't Hoff factor.</em>

<em>Molality of solution (Moles urea / Kg X):</em>

Moles urea: 31.98g * (1mol / 60.06g) = 0.53247 moles

-60.06g/mol = Molar mass urea-

In 650g = 0.650kg:

0.53247 moles urea / 0.650kg = 0.8192m

Van't Hoff factor of urea is 1

Replacing in the equation:

ΔT = Kb×m×i

ΔT = 1.97°CKgMol⁻¹×0.8192m×1

ΔT = 1.6

As the solution boils at 137°C:

ΔT = Boililng point solution - boiling point pure liquid

ΔT = 1.6°C = 137.0°C - boiling point pure liquid

Boiling point of pure liquid is 135.4°C

8 0
4 years ago
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