Answer:
The answer to your question is: 10.67 g/ml
Explanation:
graduated cylinder mass empty= 50 g
+ 30 ml of water = 120 g
+ a rock the level rises 75 ml total mass = 250 gr
density of metal = ?
Formula
density = mass / volume
Process
mass of water = 120 - 50 = 70 g
volume of rock = 75 ml
mass of the rock = 250 - 50 - 120 = 80 g
density of rock = 80 / 75 = 10.67 g/ml
Answer : The number of moles of ions form are, and there are 3 ions formed.
Explanation :
First we have to calculate the moles of calcium iodide.
Molar mass of calcium iodide = 293.9 g/mol
Mass of calcium iodide = 51.0 g
Now we have to calculate the number of moles of ions.
As we know that when calcium iodide dissolved in water then it dissocites to give calcium ion and iodide ion.
The balanced chemical reaction will be:
From this we conclude that there are 3 ions formed.
As, 1 mole of calcium iodide dissociate to give number of ions
So, 0.174 mole of calcium iodide dissociate to give number of ions
Thus, the number of moles of ions form are,
The abiotic factor that is quite used to support a relatively large amount of biotic factors is liquid(mostly water).
Cro42ag
What is the percent for the fraction nine twentieths?
1.
9%
2.
20%
3.
45%
4.
90%