what is relative molecular mass of 10.5g of XHCO3, if the mass of C in it is 1.50g? calculate the mass of hydrogen
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To find the relative molecular mass (also known as the molecular weight or molar mass) of XHCO3, we need to know the atomic masses of the elements involved. In this case, we have carbon (C), hydrogen (H), and oxygen (O).
The molecular formula of XHCO3 indicates that there is one atom of carbon (C) in XHCO3. Given that the mass of carbon (C) is 1.50g, we can calculate the molecular mass of carbon (C) using the atomic mass of carbon.
The atomic mass of carbon (C) is approximately 12.01 g/mol. Therefore, the number of moles of carbon (C) can be calculated by dividing the mass of carbon (C) by its atomic mass:
moles of carbon (C) = mass of carbon (C) / atomic mass of carbon (C)
= 1.50g / 12.01g/mol
≈ 0.1249 mol
Next, we need to determine the number of moles of hydrogen (H) in XHCO3. Since the molecular formula of XHCO3 does not specify the number of hydrogen atoms, we cannot directly calculate the moles of hydrogen. However, we can infer the ratio of hydrogen to carbon by comparing their masses.
The ratio of the mass of carbon (C) to the mass of hydrogen (H) can be calculated using the given masses:
mass ratio of hydrogen (H) to carbon (C) = mass of hydrogen (H) / mass of carbon (C)
= mass of hydrogen (H) / 1.50g
We can rearrange the equation to solve for the mass of hydrogen (H):
mass of hydrogen (H) = mass ratio of hydrogen (H) to carbon (C) x mass of carbon (C)
= mass ratio of hydrogen (H) to carbon (C) x 1.50g
However, the problem does not provide the mass ratio of hydrogen to carbon. Without this information, we cannot determine the actual mass of hydrogen (H) in XHCO3. Additional information is required to calculate the mass of hydrogen (H) accurately.
To find the relative molecular mass (Mr) of XHCO3, we need to determine the empirical formula of the compound.
1. Calculate the number of moles of carbon (C) in 1.50g:
Moles of C = Mass of C / Molar mass of C
Molar mass of C = 12.01 g/mol
Moles of C = 1.50g / 12.01 g/mol
2. Determine the number of moles of XHCO3:
Since we know the mass of C and the mass of XHCO3, we can assume the compound contains only one carbon atom. Therefore, the number of moles of XHCO3 is equal to the number of moles of C.
Moles of XHCO3 = Moles of C
3. Calculate the molecular formula by calculating the molar mass of XHCO3:
Molar mass of XHCO3 = Mass of XHCO3 / Moles of XHCO3
Molar mass of XHCO3 = 10.5g / Moles of XHCO3
4. Finally, calculate the molar mass of hydrogen (H) by subtracting the molar mass of carbon (C) from the molar mass of XHCO3:
Molar mass of H = Molar mass of XHCO3 - Molar mass of C
Note: To determine the molecular formula of XHCO3, we need additional information about the molar mass of X and the atomic mass of H.