Answers
Answer:
0.623 moles of H₂O.
Explanation:
- balanced equation: 2C₂H₆ + 7O₂ -> 4CO₂+ 6H₂O
Given:
- 6.23g of C₂H₆
- C₂H₆ molar mass is 30
solve for moles of C₂H₆
- moles = mass/mr
- moles = 6.23/30
- moles = 0.2077
solve for moles of H₂O using molar ratio
- 2C₂H₆ : 6H₂O
- 2 : 6
- 0.2077 : 0.623
Therefore, found that 0.623 moles of H₂O is produced.
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Answers
A chemist determined by measurements that 0.0250 moles of potassium bromide participate in a chemical reaction is 0.002 moles
What are moles?
The moles are the smallest unit of an atom ion molecule or substance which is used to count the number which is taking part in a chemical reaction and is equal to 2.303 ×10²³ moles of that.
To calculate the participant in a chemical reaction number of moles is 0.0250 moles so the mass will be,
number of moles = mass/ molar mass
substituting the value,
0.0250 moles = mass / 119.002
mass = 119.002 × 0.0250 moles
mass = 0.002 moles
Therefore, 0.002 moles determined by measurements that 0.0250 moles of potassium bromide participate in a chemical reaction.
Learn more about moles, here:
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My solution
39.0983+126.90447=166.00277
x/166.002277=.06
x=9.96g
Explanation:
Answers
Answer:
Explanation:
Hello,
In this case, for the computation of the energy loss when the cooling process is carried out, we use the shown below equation:
Whereas we need the mass, specific heat and change in temperature of iron within the process. Thus, the only value we need is the specific heat that is 0.444 J/(g°C), therefore, we compute the heat loss:
Negative sign points out the loss due to the cooling.
Regards.
slow down and move closer together.
merge together to form fewer atoms.
speed up and move further apart.
Answers
Cs
At
F
Answers
questions with regards to this reaction.
a) Write the molecular equation for this reaction by
Translating the two reactants into their chemical formulae.
Predict the products.
Label all the states.
Balance the reaction.
Answers
Answer:
2 FeBr₃(aq) + 3 (NH₄)₂CO₃(aq) = Fe₂(CO₃)₃(s) + 6 NH₄Br(aq)
Explanation:
Aqueous solutions of iron(III) bromide and ammonium carbonate react. This is a double displacement reaction that gives place to ammonium bromide and iron (III) carbonate. Iron (III) carbonate is insoluble so it precipitates. The corresponding molecular equation is:
2 FeBr₃(aq) + 3 (NH₄)₂CO₃(aq) = Fe₂(CO₃)₃(s) + 6 NH₄Br(aq)
Answers
Answer : The mass of evaporated must be, 1.217 kg
Explanation :
First we have to calculate the moles of water.
Molar mass of water = 18 g/mol
Now we have to calculate the heat released.
Heat released = Moles of water × Molar heat of fusion of ice
Heat released = 29.17 mol × 6.01 kJ/mol
Heat released = 175.3 kJ
Now we have to calculate the moles of
Heat = Moles of × Molar heat of vaporization of
175.3 kJ = Moles of × 17.4 kJ/mol
Moles of = 10.07 mol
Now we have to calculate the mass of
Molar mass of = 120.9 g/mol
Thus, the mass of evaporated must be, 1.217 kg