<span>Molecular reaction
2HBr(aq) Ba(OH)2 (aq) = 2H2O (l) BaBr2(aq)
Ionic equation
2H 2Br- Ba 2 2OH- --------> Ba 2 2Br - 2H2O
Net ionic equation
2H (aq) 2OH- (aq)- ---------> 2H2O (l)</span>
Answer:
Prokaryotic cell
Explanation:
If you search it up you will see that the prokaryotic cell looks exactly alike with the picture you have posted.
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
