5 times dilution
0.780M x 1/5 = 0.156M
Hope this help.
Answer:
S4N2
Explanation:
good luck have a nice day
The trick for this problem is to understand atomic mass: the fact that different atoms have different masses. What we need to do is add up all the atomic masses of the compound and work out the ratio of mass of water to the mass of sodium carbonate. Atomic masses are often given for each atom in the periodic table, but you can look them up on google too.
You can do this by adding up individual atoms for each molecule, or you can shortcut and lookup the molar mass of the compound (i.e.the task already done for you).
The molar mass of water is 18.01g/mole so for 10 moles of water we have a mass of 180.1g.
The molar mass of sodium carbonate is 106g/mole (google).
So the total mass of the sodium carbonate decahydrate compound is 180.1+106 = 286.1g, of which water would make up 180.1g, so the percentage of water is is 180.1/286.1 = 0.629, so we can round this to 63%
:)
10kg of gold is more denser than 100 kg of ice
.
<u>Explanation:
</u>
Density of a substance purely depends upon the mass and its volume occupied in the system.
In the above statement it is a comparison made between 100kg of ice vs 10kg of gold.
Density of ice in general is 0.920
and Density of gold in general is 19.3
So if we calculate for 100kg of ice,
Density=100×0.920=92 
Similarly we can calculate for 10kg of gold we get
Density=10×19.13=191.3
If we compare the above two values we can say that
Density of 10kg gold has greater value than the Density of 100kg water.
