Answer:
a) 
b) NR
c) NR
d) 
e) NR
Explanation:
a) Nickel is more reactive than copper so the first one will displace the other:
b) Due to the higher reactivity the magnesium has compared to the zinc, the first will remain in solution and the second will reamin solid. So, NR.
c) No reaction occurs, gold is resistant to acid in normal conditions due to its characteristic as noble metal.
d) Chromium is more reactive than cobalt so the last one will be displaced:
e) Nothing happens, the reduction potencial of the hydrogen gas bubbled ins't enough to reduce the silver.
I think, is HYDROGEN BOND!
This is some kind of is the electrostatic attraction between polar molecules that occurs when a hydrogen (H) atom bound to a highly electronegative atom such as nitrogen (N), oxygen (O) or fluorine (F)... see image below! ;-)
Find moles of MgCl first by dividing by the molar mass.
21.9 g / 95.211 g/mol = 0.230 mol MgCl
Then divide by L of water to get the molarity.
0.230 mol / 0.750 L = 0.307 M MgCl
The answer would be present and future humans
Answer:
The answer to your question is V = 0.108 L or 108 ml
Explanation:
Data
Volume = ?
mass = 0.405 g
Temperature = 273°K
Pressure = 1 atm
Process
1.- Convert mass of Kr to moles
83.8 g of Kr -------------------- 1 mol
0.405 g ------------------- x
x = (0.405 x 1) / 83.8
x = 0.0048 moles
2.- Use the Ideal gas law to solve this problem
PV = nRT
- Solve for V
V = nRT / P
- Substitution
V = (0.0048)(0.082)(273) / 1
- Simplification
V = 0.108 / 1
- Result
V = 0.108 L
