Answer:
The answer to your question is the number 4. 1.53175 L
Explanation:
Data
Volume 1 = V1 = 557 ml
Concentration 1 = C1 = 11 M
Volume 2 = V2 = ?
Concentration 2 = C2 = 4 M
Formula
Volume 1 x Concentration 1 = Volume 2 x Concentration 2
or V1 x C1 = V2 x C2
Solve for V2 V2 = V1 x C1 / C2
-Substitution
V2 = (557)(11) / 4
-Simplification
V2 = 6127 / 4
-Result
V2 = 1531.75 ml or 1.53175 L
Conclusion
557 ml of 11 M must be diluted to 1.53175 L
Answer is: enthalpy is -1276,8 kJ.
Chemical reaction: 2CH₃OH(l) + 3O₂(g) → 2CO₂(g) + 4H₂<span>O(g).
</span>ΔH(CH₃OH) = -238,7 kJ/mol.
ΔH(H₂O) = -241,8 kJ/mol.
ΔH(CO₂) = -<span>393,5 kJ/mol.
</span>ΔH(O₂) = 0 kJ/mol.
ΔHreaction = ∑ΔHproducts - ∑ΔHreactants
ΔHreaction = (2·(-393,5) + 4·(-241,8) - (2·(-238,7))
ΔH = (-787 - 967,2) + 477,4
ΔH = -1276,8 kJ.
Answer: the answer is c
Explanation: hope this helps you
300 degrees Kelvin = 300 - 273 = 27 degrees Celsius.
So what you need to do is find out how many degrees Fahrenheit that is.
F = 9/5(27) + 32
F = 48.6 + 32
F = 80.6
You are at 55oF. You need to go from 55 to 80.6 or 25.6 degrees F.
Your closest answer is B. <<<<<< Answer
Answer:
The s-block of the periodic table has 1 orbital
we know that each orbital consists of 2 electrons
and since the periodic table arranges the elements on the basis of their atomic number,
the s-block spans 2 groups.
This is also the reason why the p-block spans 6 groups, d-block spans 10 groups and f-block spans 14 groups