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Bad White [126]
3 years ago
10

Which of the following preparation of salt is incorrect? *

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
3 0

Answer:

acid + hydrogen

Explanation:

gives a good combination

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The common laboratory solvent ethanol is often used to purify substances dissolved in it. The vapor pressure of ethanol , CH3CH2
OverLord2011 [107]

Answer:

Molar mass of solute is 183.4g/mol

Explanation:

Using Raoult's law it is possible to find moles of solute, thus:

P_{solution} = X_{solvent}P_{solvent}^0

Where pressure of solution is 53.15 mmHg, pressure of pure solvent is 54.68 mmHg and mole fraction is:

53.15 mmHg = X 54.68 mmHg

<em>0.9720 = X</em>

<em />

Mole fraction of solvent is defined as moles of solvent / total moles.

Moles of solvent are:

286.8g × (1mol / 46.07g) = 6.225 moles of ethanol.

That is:

0.9720 = \frac{6.225mol}{Y+6.225mol}

<em>Where Y are moles of solute.</em>

6.051 + 0.9720Y = 6.225

0.9720Y = 0.174

Y = 0.179 moles of solute

As mass of solute dissolved was 32.83g. Molar mass of solute is:

32.83g / 0.179mol = <em>183.4g/mol</em>

4 0
3 years ago
Cyanide poisoning can occur when compounds such as sodium cyanide dissociate in water to produce cyanide ions. what is the formu
Sunny_sXe [5.5K]
Eezy real talk ma frend!
The fromula for sodium cyanide is NaCn.
4 0
3 years ago
Read 2 more answers
Iron-56, Iron-54, and Iron-58 are all ____ of iron
JulijaS [17]

Answer:

in the 50 place

Explanation:

3 0
3 years ago
Read 2 more answers
Can someone help me with this?
Anvisha [2.4K]
With what? I don’t see a photo or such.
8 0
3 years ago
What is the mass, in grams, of 0.125 L of CO2 at STP? Question 4 options: 2.80 g 181 g 0.246 g 4.11 g
Zolol [24]
1) Use the fact that 1 mol of gas at STP occupies 22.4 liter

=> 1 mol / 22.4 l = x / 0.125 l => x = 0.125 l * 1 mol / 22.4 l = 0.00558 mol

2) Now use the molar mass of the gas

molar mass of CO2 ≈ 44 g / mol

Formula: molar mass = mass in grams / number of moles =>

mass in grams = molar mass * number of moles = 44 g/mol * 0.00558 moles

mass = 0.246 g

Answer: 0.246 g
7 0
3 years ago
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