4C7H5N3O6 + 21O2 = 28CO2 + 10H2O + 6<span>N<span>2
</span></span><span>According to the reaction equation, it can be seen that TNT and O2 have following stoichiometric ratio:
</span><span>
n(</span>C7H5N3O6)<span> : n(O2) = 4 : 21
</span>n(O2) = 21/4 x n(C7H5N3O6) = 5.25 x n(C7H5N3O6)
n(C7H5N3O6) = m/M= <span>0.853/227 = 0.0038 mole
</span>
n(O2) = 5.25 x n(C7H5N3O6) = 5.25 x 0.0038 = 0.02 mole
m(O2) = n x M = 0.02 x 32 = 0.64 g = 640mg
Answer: The new volume of the air in the syringe is 7.3 mL.
Explanation:
Given: 
= 2.0 mL, 
= 1.02 atm, 
= ?, 
= 1.27 atm, 
Formula used to calculate the new volume in syringe is as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that the new volume of the air in the syringe is 7.3 mL.
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
Answer:
6 moles
Explanation:
You have a 1:3 ratio between nitrogen gas and hydrogen gas
Cr2O7Zn that is the formula
