Chalk contains calcium,carbon and oxygen in the ratio 10:3:12.Find the percentage of carbon in a chalk and in a stick of chalk, carbon in 3g what is the length of chalk stick?
no idea what the length of the chalk stick is, since you have given neither density nor size.
All we know is that the carbon is 3/25 = 12% of the total mass.
carbon is 3/25 = 12/100 = 12%
No idea. You did not tell me the diameter of the stick.
To find the percentage of carbon in a chalk, we need to calculate the fraction of carbon in the total composition.
First, let's calculate the total ratio of chalk, which is 10:3:12. This means for every 10 parts of calcium, there are 3 parts of carbon and 12 parts of oxygen.
To determine the fraction of carbon, we need to calculate the sum of the parts: 10 + 3 + 12 = 25.
Now, let's calculate the fraction of carbon in the composition: 3/25.
To convert this fraction to a percentage, we multiply it by 100: (3/25) * 100 = 12%.
Therefore, the percentage of carbon in a standard chalk is 12%.
Now, let's move on to the second part of the question. We know that the amount of carbon in a chalk stick is 3g. To find the length of the chalk stick, we need to apply the given ratio.
The ratio of carbon to chalk is 3g : 3 parts (carbon).
In the total composition ratio of 10:3:12, the ratio of carbon to calcium is 3:10, which represents 3 parts of carbon for every 10 parts of calcium.
Now, we can set up a ratio to find the length of the chalk stick. Let's call the length "x":
3g/3 parts = x/x parts
Simplifying this ratio, we get:
1g/1 part = x/x parts
So, the length of the chalk stick is 1g, or we can say that for every gram of chalk stick, it has a length of 1 unit.
Therefore, if the weight of the chalk stick is 3g, the length of the chalk stick is 3 units.