You should read up on Proust's law, better known as the Law of Definite Proportions. This is a chemical law that defines your question more generally, on why the ratio of elements and ions are always fixed.
Basically, this compound Magnesium(II) Chloride is MgCl2 because it has the same number of protons, neutrons, and electrons all the way. This defines the properties of the compound or atom.
Answer:
75 g
Step-by-step explanation:
<em>Step 1</em>. Calculate the molar mass of CO₂
C = 12.01
2O = 2 × 16.00 = <u>32.00
</u>
Total = 44.01 g/mol
<em>Step 2</em>. Calculate the mass of CO₂
Mass of CO₂ = 6 mol CO₂ × (44.01 g CO₂/1 mol CO₂)
Mass of CO₂ = 75 g CO₂
Ill try to help you find the answer
Explanation:
The reaction is as follows.
Standard values of bond energies are as follows.
C-C = 347 kJ/mol
C-H = 414 kJ/mol
C-O = 360 kJ/mol
O-H = 464 kJ/mol
O=O = 498 kJ/mol
C=O = 799 kJ/mol
Hence, calculate the change in enthalpy of the reaction as follows.
= [5(C-H) + 1(C-C) + 1(C-O) + 1(O-H) + 3(O=O)] - [4(C=O) + 6(O-H)]
= ![[5 \times 414 + 1 \times 347 + 1 \times 360 + 1 \times 464 + 3 \times 498] kJ - [4 \times 799 + 6 \times 464]kJ](https://tex.z-dn.net/?f=%5B5%20%5Ctimes%20414%20%2B%201%20%5Ctimes%20347%20%2B%201%20%5Ctimes%20360%20%2B%201%20%5Ctimes%20464%20%2B%203%20%5Ctimes%20498%5D%20kJ%20-%20%5B4%20%5Ctimes%20799%20%2B%206%20%5Ctimes%20464%5DkJ)
= (4735 - 5980) kJ
= -1245 kJ
Thus, we can conclude that the enthalpy of given reaction is -1245 kJ.
