What happens when the density of a medium increases?

How can I calculate the percent concentration of solution?

Temka [501]

You should calculate in this way

m solute= 15g

m solution = 100g

C%= m solute/m solution *100%

C% = 15/100 *100 = 15%

C%= 15%

7 0

4 years ago

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he Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In th

Vika [28.1K]

Answer:

148.2 g of H20

Explanation:

Equation of reaction: 4NH3 + 5O2 ---> 4NO + 6H20

From the equation above, 4 moles of ammonia reacts with 5 moles of oxygen gas to produce 6 moles water.

Molar mass of NH3 = 17 g/mol;

Molar mass of O2= 32 g/mol;

Molar mass of H2O = 18 g/mol

First, we determine the limiting reactant:

4*17 g of NH3 reacts with 5*32 g of O2

Mass Ratio = 68 : 160

Therefore, NH3 is the limiting reactant.

68 g of NH3 reacts to produce 6* 18 g of H20 = 108 g of H2O

93.3 g of NH3 will react to produce (93.3 * 108)/68 g of H20 = 148.2 g of H2O

Therefore, the maximum amount of H2O produced = 148.2 g

7 0

3 years ago

The decomposition of 3.32 g CaCO3 yields 1.24 g CaO. What is the percent yield of this reaction? (CaCO3 --> CaO + CO2)

alex41 [277]

Answer:

66.57%

Explanation:

The decomposition reaction of calcium carbonate is shown below as:

$CaCO_3\rightarrow CaO+CO_2$

Calculation of moles of $CaCO_3$ :

Amount = 3.32 g

Molar mass of $CaCO_3$ = 100 g/mol

The formula for the calculation of moles is shown below:

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

Thus, moles are:

$moles= \frac{3.32\ g}{100\ g/mol}$

$moles= 0.0332\ mol$

According to reaction,

0.0332 moles of $CaCO_3$ decomposes to yield 0.0332 moles of $CaO$

Theoretical yield = 0.0332 moles

Calculation of moles of $CaO$ formed as:

Amount = 1.24 g

Molar mass of $CaO$ = 56 g/mol

The formula for the calculation of moles is shown below:

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

Thus, moles are:

$moles= \frac{1.24\ g}{56\ g/mol}$

$moles= 0.0221\ mol$

Experimental yield = 0.0221 moles

$Yield\%=\frac {Experimental yield}{Theoretical yield}\times 100$

Thus,

$Yield\%=\frac {0.0221}{0.0332}\times 100$

<u>Percent yield = 66.57%</u>

5 0

4 years ago

For two acids of equal concentration, the stronger acid has —

forsale [732]

Answer:

C

Explanation:

it has to have hydroniums

6 0

3 years ago

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When a turtle is lying on a sunny riverbank,how is it’s body temperature affected when it starts swimming in a cool river

geniusboy [140]

Answer:

When a turtle is lying on a sunny riverbank, it’s body temperature rises and when it starts swimming in a cool river, it's body temperatures drop.

Explanation:

Cold-blooded animals, like turtles, do not have an internal feedback loop that regulates constant body temperature – as warm-blooded animals do. Their body temperatures fluctuate with that of the environment. This is why you see animals like lizards basking on rocks to raise their body temperatures. When it too hot, then they seek the shade under these rocks to lower their temperatures.

Learn More:

For more on warm-blooded vs cold-blooded animals check out;

brainly.com/question/11796999

brainly.com/question/11904373

brainly.com/question/9506185

brainly.com/question/14357623

#LearnWithBrainly

4 0

3 years ago