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Artyom0805 [142]
3 years ago
10

Nkkljihghjhytuyftghvnvmjkhjkhjkh

Chemistry
1 answer:
NeX [460]3 years ago
4 0

Answer:

seriously ....,........

I don't like chemistry

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A 51.24-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 liters of solution. How many mL of this solution must be d
g100num [7]

Answer:

0.40 L

Explanation:

Calculation of the moles of Ba(OH)_2 as:-

Mass = 51.24 g

Molar mass of Ba(OH)_2 = 171.34 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{51.24\ g}{171.34\ g/mol}

Moles= 0.2991\ mol

Volume = 1.20 L

The expression for the molarity is:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Molarity=\frac{0.2991\ mol}{1.20\ L}=0.24925\ M

Thus,

Considering

Molarity_{working\ solution}\times Volume_{working\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}

Given  that:

Molarity_{working\ solution}=0.100\ M

Volume_{working\ solution}=1\ L

Volume_{stock\ solution}=?

Molarity_{stock\ solution}=0.24925\ M

So,  

0.100\ M\times 1\ L=0.24925\ M\times Volume_{stock\ solution}

Volume_{stock\ solution}=\frac{0.100\times 1}{0.24925}\ L=0.40\ L

<u>The volume of 0.24925M stock solution added = 0.40 L </u>

6 0
3 years ago
If you can buy 8 cans of corn for 3.20 how much would 48 cans cost
Shkiper50 [21]

Answer:

$19.20

Explanation:

divide 3.20 by 8 in order to get the cost of 1 can

3.20/8 = 0.40

multiply the cost of 1 can ($0.40) by 48 in order to get the cost of 48 cans

0.40 * 48 = 19.20

$19.20 for 48 cans of corn

4 0
3 years ago
What is included in counting the electron domain around the central atom vsepr theory
In-s [12.5K]

Answer:

Lone pairs and bonding pairs  

Explanation:

The electron domain around the central atom includes

  • All lone pairs on the central atom
  • All bonding pairs between the central atom and the atoms directly attached to it

Double and triple bonds count as single domains.

Thus, the nitrite ion has three electron domains:

  1. A lone pair
  2. An N-O single bond
  3. An N-O double bond

 

4 0
4 years ago
According to Arhennius, which of the following is a base? *
Grace [21]
C is the answer !!!!!!!!!!!!!
3 0
3 years ago
20. What will be the concentration, in mol dm, of the resulting solution when 200 cm' of
My name is Ann [436]

Answer:

0.140mol/dm^3.

Explanation:

200cm3 = 0.2dm^3.

0.2dm^3 * 0.200mol/dm^3 = 0.040mol

300cm^3 = 0.3dm^3

0.3dm^3 * 0.100mol/dm^3 = 0.030mol

The number of moles is 0.070mol of HCl (aq).

The volume of the solution is 0.5dm^3.

Hence the concentration is 0.140mol/dm^3.

3 0
3 years ago
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