Answer:
CaCO3(s) <==> Ca2+(aq) + CO3 2-(aq)
Let X = the amount of CaCO3 dissolved in Na2CO3 or the amount of each ions formed i.e. Ca2+ and CO3 2–. Then, put this into the formula :
Ksp = [Ca2+] [CO3 2-]
5 × 10^-9 = [X]*[X]
X^2 = 5 × 10^-9
X = √5 × 10^-9
X = 7.07 x 10^-5 mole/L
So, the amount of CaCO3 dissolved in 0.1M Na2CO3 or the amount of Ca2+ and CO3 2- ions produced is 7.07 x 10^-5 mole/L
Answer:
Mass of carbon = 236.5 g
Explanation:
Given data:
Mass of C₃H₆ = 275 g
Mass of C = ?
Solution:
Formula:
Mass of carbon = molar mass of carbon/ molar mass of compound × mass of compound
Molar mass of carbon = 12 g/mol
Molar mass of compound = 42 g/mol
Mass of carbon = 36 g/mol / 42 g/mol × 275 g
Mass of carbon = 0.86 × 275 g
Mass of carbon = 236.5 g
Answer:
1250joules
Explanation:
The kinetic energy is energy in motion and it's formula is
KE =1/2MV^2
M represent mass which is 100Kg.
V represent velocity which is 5m/s
Therefore, KE = 1/2×100×5× 5
= 50 × 25
KE= 1250joules
Explanation:
There are ten d electrons in the outermost d subshell for Zn2+.
