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jek_recluse [69]
3 years ago
8

Three acid samples are prepared for titration by 0.01 M NaOH:

Chemistry
1 answer:
Kruka [31]3 years ago
8 0
B is the correct answer
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Ten grams of a gas occupies 12.5 liters at a pressure of 42.0 cm Hg. What is the volume when the pressure has increased to 75.0
Fantom [35]
Based on the question, it is evident that the question is based on Boyle's Law which we will use to find the answer necessary.

Now, Boyle's Equation: P₁V₁ = P₂V₂

     V₂ = P₁V₁  ÷  P₂

∴   V₂  =  (12.5L × 42.0 cm · Hg) ÷ 75 cm · Hg

⇒  V₂  = 7 L
 
Thus, the <span>volume when the pressure has increased to 75.0 cm Hg is 7 Litres.</span>
8 0
3 years ago
If the volume of a solution is 25.6 L and its molarity is 8.20 M, how many moles of solute are
harkovskaia [24]

Answer:

210 moles

Explanation:

From the question given above, the following data were obtained:

Volume of solution = 25.6 L

Molarity = 8.20 M

Mole of solute =?

Molarity is simply defined as the mole of solute per unit litre of water. Mathematically, it can be expressed as:

Molarity = mole /Volume

With the above formula, the mole of solute dissolved can be obtained as follow:

Volume of solution = 25.6 L

Molarity = 8.20 M

Mole of solute =?

Molarity = mole /Volume

8.20 = mole / 25.6

Cross multiply

Mole = 8.20 × 25.6

Mole = 209.92 ≈ 210 moles

Thus, the mole of solute dissolved in the solution is 210 moles

7 0
3 years ago
A mixture of He, Ne, and Ar gases at a particular temperature has partial pressures of 0.75 atm He, 0.30 atm Ne, and 0.62 atm Ar
inessss [21]

Answer:

The order of mole fraction in increasing order will be:

\chi_{Ne}

Explanation:

Relation between mole fraction and partial pressure of the component is given as:

p_i=P\times \chi_i

Where :P = Total pressure of the mixture

p_i = partial pressure of the  i component

\chi_i = Mole fraction of the i component

We have :

Partial pressure of the helium gas ,p_{He}= 0.75 atm

Partial pressure of the neon gas, p_{Ne}= 0.30 atm

Partial pressure of the argon gas ,p_{Ar}= 0.62 atm

As we can see that from the above equation, that partial pressure and mole fraction are directly linked to each other.

p_i\propto \chi_i

So, the gas with higher value of partial; pressure will have higher value of mole fraction in the mixture.

So, the order of partial pressure from lowest to highest is:

p{Ne}

And hence the order of mole fraction will  also be same :

\chi_{Ne}

5 0
4 years ago
☆BRAINLIEST to correct answer☆<br>​
ss7ja [257]

Answer:

Explanation:

K2+H2O--------->KOH

3 0
3 years ago
A technical machinist is asked to build a cubical steel tank that will hold "265" L of water. Calculate in meters the smallest p
FrozenT [24]

Answer:

0.64 m

Explanation:

Given that;

1L = 0.001 cubic metre

Then;

263 L = 263 L × 0.001 cubic metre/1L

= 0.263 cubic metre

Volume of a cube = l^3

l= 3√V

l= 3√0.263 cubic metre

l= 0.64 m

8 0
3 years ago
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