Question

calculate the ratio by number of atoms of elements present in carbon dioxide​

Answer 1

Answer:

Answer:In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1

Answer:In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1Explanation:

Answer:In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1Explanation:In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1

I think you understand

Answer 2

Answer:

In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1

Explanation:

We know that carbon Dioxide always has a formula of CO2

, independent of its source. So, we can easily calculate the ratio by mass of the two elements that constitute this compound, which are carbon and oxygen. This is in agreement with the Law of Constant proportion or Law of Definite Proportion which was proposed by Joseph Proust.Since each molecule of CO2

has 1 Carbon atom and 2 Oxygen atoms, we can easily calculate the ratio by mass of these two elements if we know the individual masses of the atoms of these two elements.

Carbon atom has an atomic mass of 12 u

and an Oxygen atom has an atomic mass of 16 u

. So, the ratiMass of C Mass of O=12/2×16=12/32=3/8

o can be calculated as:So, we can see that every pure sample of carbon dioxide would always contain carbon and Oxygen in the mass ratio of 3:8.

Additional information: There is another law that is concerned with mass ratios that is the law of Multiple Proportions. According to this law, if two elements combine to form more than one compound, then, the ratios of the masses of the second element which combine with a fixed mass of the first element are always the ratios of small whole numbers.

Students often mix-up the mass ratio of elements in a compound with the ratio of the number of atoms of different elements present in a molecule of the compound. Like, in CO2

Students often mix-up the mass ratio of elements in a compound with the ratio of the number of atoms of different elements present in a molecule of the compound. Like, in CO2, the ratio of the number of atoms of C and O is 1:2 while the mass ratio of C and O is 3:8.