Answer:
The answer for the question is True I think
Answer:
4.226×10^8
Explanation:
4.2 ×10^8+2.6×10^6=422600000
or 4.226×10^8
Answer:
Explanation:
1. Please provide the enthalpy info - I will work on it with the info
2.
i) Reaction a should be modified to match the number of S in equation:
2S + 2O2 -> 2SO2 deltaH = -370kJ
ii) Reaction b should be written reversely to match the reactants of SO2:
2SO2 + O2 -> 2SO3 deltaH = 256kJ
iii) Adding the equations together:
2S + 3O2 -> 2SO3
iv) Enthalpy of the combined reaction = -370+256 = -114kJ
It is negative so the reaction is exothermic.
Answer:
The physical property is density
Answer:
57 mL
Explanation:
To make things clear, when 769 mL of ethanol were mixed with 507 mL of water, the resulting volume was not (769+507) 1276 mL, but a lower value. This is because of the interactions between liquid molecules.
First we<u> calculate how many grams of ethanol are there in 769 mL</u>, using the <em>given density</em>:
- 0.7893 g/mL * 769 mL = 606.97 g ethanol
Then we<u> convert 606.97 g of ethanol into moles</u>, using its<em> molar mass</em>:
- 606.97 g ÷ 46.07 g/mol = 13.17 mol
Now we <u>calculate the actual volume of the solution</u>, using the <em>definition of molarity</em>:
- Volume = Moles / Molarity
- 13.17 mol / 10.8 M = 1.219 L
Finally we <em>convert 1.219 L to mL</em>, and <u>calculate the difference in volume</u>:
- 1276 mL - 1219 mL = 57 mL
