Q = mcΔT = (4.00 g)(0.129 J/g•°C)(40.85 °C - 0.85 °C)
Q = 20.6 J of energy was involved (more specifically, 20.6 J of heat energy was absorbed from the surroundings by the sample of solid gold).
Answer:
A.......
Explanation: The sun is the main source of energy
Answer:
The answer is:
(a) ![NaCl(aq)+AgNO_3(aq) \rightarrow AgCl(r) +NaNO_3 (aq)](https://tex.z-dn.net/?f=NaCl%28aq%29%2BAgNO_3%28aq%29%20%5Crightarrow%20AgCl%28r%29%20%2BNaNO_3%20%28aq%29)
(b) NaCl
(c) 0.211 g
Explanation:
Given:
The mass of NaCl,
= 0.0860 g
The molar mass of NaCl,
= 58.44 g/mol
The volume of
,
= 30.0 ml
or,
= 0.030 L
Molarity of
,
= 0.050 M
Moles of NaCl will be:
= ![\frac{Given \ mass}{Molar \ mass}](https://tex.z-dn.net/?f=%5Cfrac%7BGiven%20%5C%20mass%7D%7BMolar%20%5C%20mass%7D)
= ![\frac{0.0860}{58.44}](https://tex.z-dn.net/?f=%5Cfrac%7B0.0860%7D%7B58.44%7D)
= ![0.00147 \ mol](https://tex.z-dn.net/?f=0.00147%20%5C%20mol)
now,
Moles of
will be:
![= Molarity\times Volume](https://tex.z-dn.net/?f=%3D%20Molarity%5Ctimes%20Volume)
![= 0.050\times 0.030](https://tex.z-dn.net/?f=%3D%200.050%5Ctimes%200.030)
![=0.0015 \ mol](https://tex.z-dn.net/?f=%3D0.0015%20%5C%20mol)
(a)
The reaction is:
⇒ ![NaCl(aq)+AgNO_3(aq) \rightarrow AgCl(r) +NaNO_3 (aq)](https://tex.z-dn.net/?f=NaCl%28aq%29%2BAgNO_3%28aq%29%20%5Crightarrow%20AgCl%28r%29%20%2BNaNO_3%20%28aq%29)
(b)
1 mole of NaCl react with,
= 1 mol of ![AgNO_3](https://tex.z-dn.net/?f=AgNO_3)
0.0015 mol
needs,
= ![0.00150 \ mol \ NaCl](https://tex.z-dn.net/?f=0.00150%20%5C%20mol%20%5C%20NaCl)
Available mol of NaCl < needed amount of NaCl
So,
The limiting reagent is "NaCl".
(c)
The precipitate formed,
= ![0.00147\times \frac{1}{1}\times \frac{143.32}{1}](https://tex.z-dn.net/?f=0.00147%5Ctimes%20%5Cfrac%7B1%7D%7B1%7D%5Ctimes%20%5Cfrac%7B143.32%7D%7B1%7D)
= ![0.211 \ g \ AgCl](https://tex.z-dn.net/?f=0.211%20%5C%20g%20%5C%20AgCl)
Fully donating an electron results in an ionic bond, so A is the correct answer.
In comparison, B, a hydrogen bond, is a bond that forms between an H in one compound and an O, N, or F in another. It is among the strongest of intermolecular forces, while ionic/covalent bonds are intramolecular.
C, a covalent bond, is a bond that forms when atoms share electrons instead of donating them.
Answer:
I think It is an organism