Answer:
b. - 184 J/K
Explanation:
- ΔSsurr = - ΔH/T....at constant P and T.
∴ ΔHrxn = 54.2 KJ = 54200 J
∴ T = 25°C ≅ 298.15 K
⇒ ΔSsurr = - (54200 J)/(298 K)
⇒ ΔSsurr = - 182 J/K ≅ - 184 J/K
Answer:
The cell wall provides support for plant cells, the cell membrane allows materials to enter and
exit the cell.
Answer:
single displacement reaction
Explanation:
coefficient if Ag is 2
after it is balanced
I believe the correct answer would be the first option. It is 100 mL graduated cylinder that is the best apparatus that could be used. It has the smallest graduation as compared to the other choices. It can measure up to 0.1 mL.
Answer:
0.71
Explanation:
The molecular mass of NaCl is, 23+35.5
= 58.5
1 mole means molecular mass (in gram)
In 58.5 gm NaCl there is 1 mole.
So, 42.1 gm NaCl contains 42.1/58.5 =0.71 moles.
