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:
true
Explanation:
light travels faster than sound.
Answer: Sand
Explanation: Out of all the choices, sand is the only one that cannot react with other substances.
2KF(s) -----> 2K(s)+F2(g)
The shape of an igneous rock is based on the time it takes for the rock to cool. The quicker an igneous rock is formed, the smaller the rock is going to be. If an igneous rock cools down slowly, It will be larger. Therefore an igneous rock with large crystals cooled down slowly. Therefore the answer is choice 1.
