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AveGali [126]
3 years ago
13

The energy to move water And allow it to change from a to a gas or solid ultimately comes from the

Chemistry
1 answer:
rosijanka [135]3 years ago
4 0

Answer:

Explanation:

Solid

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Ok what you want. I got u
5 0
2 years ago
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Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide. Ca) + H2O --> Ca(OH)2 In a particular
mars1129 [50]

Answer:

Percent yield = 92.5%

Explanation:

The question asks for the percent yield which can be defined as:

\frac{actual yield}{theoretical yield} .100

Where the actual yield is <em>how much product was obtained</em>, in this case 6.11 g of Ca(OH)₂, and the theoretical yield is <em>how much product could be obtained with the given reactants theoretically</em>, that is if the reaction would work perfectly. So we need to calculate first the theoretical yield.

1. First lets write the chemical equation reaction correctly and check that it is balanced:

CaO + H₂O → Ca(OH)₂

2. Calculate the amount of product Ca(OH)₂ that can be obtained with the given reactants (theoretical yield), which are 5.00g of CaO and excess of water. So the amount of CaO will determined how much Ca(OH)₂ we can obtained.

For this we'll use the molar ratio between CaO and Ca(OH)₂ which we see it is 1:1. For every mol of CaO we'll obtain a mol of Ca(OH)₂. So lets convert the 5.00 g of CaO to moles:

 Molar Mass of CaO: 40.078 + 15.999 = 56.077 g/mol

 moles of CaO = 5.00 g / 56.077 g/mol = 0.08916 moles

As we said before from the molar ratio moles of Ca(OH)₂ = moles of CaO

So the moles of Ca(OH)₂ that can be obtained are 56.077 g/mol

We need to convert this value to grams:

 Molar Mass of Ca(OH)₂ = 40.078 + (15.999 + 1.008)*2 = 74.092 g/mol

Theoretical yield of Ca(OH)₂ = 0.08916 moles x 74.092 g/mol = 6.606 g

3. Calculate the percent yield:

\frac{actual yield}{theoretical yield} .100

Percent yield = (6.11 g / 6.606g) x 100 = 92.5 %

5 0
3 years ago
Read 2 more answers
All the following are compounds except. A.water. B.sugar solution. C.aqueous. D.sulphur dioxide
kap26 [50]

Answer:

B.sugar solution

Explanation:

A sugar solution is not a compound.

Rather, the solution is a mixture and an impure substance.

  • A compound is composed of two or more kinds of atoms or elements joined in a definite grouping .
  • The properties of the compound is distinct from those of the individual atoms that makes them.
  • Sugar solution is sugar and water
  • It is made up of two compounds not chemically combined.
5 0
3 years ago
HELP ME PLEASEEEEE!!!!!!!!!!
AlladinOne [14]

Answer:

I dont know what the answer is

Explanation:

3 0
2 years ago
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A sample of hydrogen gas, has a volume of 8.56 L at a temperature 0oC and pressure of 1.5 atm. Calculate the number of moles of
erica [24]
P = 1.5atm ≈ 1519.88hPa
V = 8.56L
R = 83.1 [hPa*L] / [mol*K]
T = 0°C =273K

pV = nRT   |:RT

n = pV / RT

n = [1519.88hPa*8.56L] / [83.1 [hPa*L] / <span>[mol*K] * 273K]
n </span>≈ <u>0.57mol</u><span><u> </u></span>
3 0
3 years ago
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