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irakobra [83]
3 years ago
11

What is the percent mass concentration of a solution that has 40g of NaOHin 500g of solution?

Chemistry
1 answer:
rodikova [14]3 years ago
5 0

Answer:

540

Explanation:

i added them and then the result is out

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at a fixed temperature and pressure, a cylinder contains equal volumes of o2 and an unknown gas, weighing 20.0 g and 17.5 g resp
sukhopar [10]

At a fixed temperature and pressure, a cylinder contains equal volumes of O2 and an unknown gas. The identity of the unknown gas CO.

The number of moles of a given substance is calculated by dividing the mass by the molar mass.

The number of moles of O₂ = \mathbf{=\dfrac{20.0 \ g}{32 \ g/mol}}

= 0.625 moles.

Based on the given assumption, at fixed temperature and pressure;

  • Let assume that the number of moles of the unknown gas is = 0.625 moles  

The molar mass of the unknown gas can be estimated as:

\mathbf{= \dfrac{mass}{number \ of \ moles}}

\mathbf{= \dfrac{17.5 \ g}{0.625 \ moles}}

= 28 g/mol

Therefore, we can conclude that the unknown gas is CO.

Learn more about gases here:

brainly.com/question/1369730?referrer=searchResults

5 0
2 years ago
0 ml of a 1.30 m solution is diluted to a total volume of 248 ml. a 124-ml portion of that solution is diluted by adding 189 ml
miskamm [114]
0.2842 M<span> * 114 </span>ml<span> = M2 * (114+137) </span>ml<span> ... 228 </span>mL<span> = 0.228 L 114 </span>mL<span> ... </span>Final concentration<span> (or molarity) = (0.0324 moles) / [(0.114 L + 0.137 L)]</span>
7 0
4 years ago
17. Elements in the periodic table are arranged according to their.​
iren2701 [21]
In the modern periodic table the elements are arranged in order of increasing atomic number.
7 0
3 years ago
Bases and acids are what helpppppppp!!
MrRissso [65]

Answer:

Science

Explanation:

its for science

4 0
4 years ago
12. If the total pressure exerted by 3 gases is 45 atm and each individual gas has the
Bumek [7]

Answer:

Partial pressure for each of the three gases, in the mixture is 15 atm

Explanation:

Remember that the total pressure of a mixture, is the sum of partial pressures from the gases contained in the mixture.

Our total pressure = 45 atm

The 3 gases have the same pressure, so we can propose this equation:

3x = 45 atm

where x is the partial pressure for each of the three gases.

x = 45/3 → 15 atm

3 0
4 years ago
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