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2 years ago

How would you prepare the following aqueous solutions?

Chemistry

1 answer:

Xelga [282]2 years ago

6 0

The molarity of the solution is 0.1625M.

<h3>What do you meant by Molarity</h3>

Molarity is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of solute per litres of a solution .

Molarity → no of moles / Volume (L)

SI unit of Molarity is M or mol/ L

We have given here the mass of solution is 3.10×10²g .

molality of the solution is 0.125m

Molality → no of moles / mass in kg

→ 0.125×3.10×10²/ 1000

→ no.of moles = 0.0162

For molarity we can assume volume as 1000 ml .

Molarity = 0.0162×1000/ 100

Molarity →0.162 M.

So, the molarity of solution will be 0.162M.

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How many atoms of hydrogen are there in 18g of water ?

Bingel [31]

Answer:

They are 1.204×10^24 atoms of hydrogen present in 18 grams of water. In order to calculate this,it is necessary to compute the number of hydrogen moles present in the sample.

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2 years ago

A gas occupies a volume of 85.0 liters at a pressure of 2.24 atm and a temperature of 22.5 degrees celsius. How many moles of ga

White raven [17]

Answer:

n = 7.86 mol

Explanation:

This question can be solved using the ideal gas law of PV = nRT.

Temperature must be in K, so we will convert 22.5C to 295 K ( Kelvin = C + 273).

R is the ideal gas constant of 0.0821.

(2.24atm)(85.0L) = n(0.0821)(295K)

Isolate n to get:

n = (2.24atm)(85.0L)/(0.0821)(295K)

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2 years ago

Select the correct answer. The wavelength of a given region of the electromagnetic spectrum ranges from 1 x 10-11 - 1 x 10-8 met

Makovka662 [10]

X-rays are found in the given region.

Answer: Option B

<u>Explanation:</u>

The wavelengths of different waves are studied carefully, and their range is determined according to the frequency they exhibited. And based upon the studies, the electromagnetic waves are classified into eight different categories such as gamma, X-, UV, visible, near IR, middle IR, far IR, micro and radio waves.

And each category has different wavelengths and the given radiation falls under X-rays. The wavelength range of X-rays varies from 1 nm to 1 pm. Here, “nm” stands for nano meter and “pm” stands for “pico meter”.

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2 years ago

A company desires to produce nickel from refining nickel oxide and sulfide ores. the first step of the process will produce a ni

inn [45]

Answer is: increase the concentration of NiCO₄ and <span>withdraw CO from the products as it is forming.

Balanced chemical reaction: NiCO</span>₄(g) ⇄ Ni(s) + 4CO(g).
According to Le Chatelier's Principle the position of equilibrium moves to counteract the change:
1) the position of equilibrium will move to the right, so that the concentration of nickel carbonyl gas decreases again and produce more nickel.
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2 years ago

What quantity in moles of HCl are there in 35.0 mL of 0.350 M HCl?

marta [7]

Answer:

0.0123 moles

Explanation:

Concentration = Moles / Volume of solution

or you can rearrange the formula to get

Moles = concentration (moles/liter) x volume of solution (liter)

First convert your volume to L instead of mL. 35mL = 0.035L

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5 0

2 years ago