18. What is the molecular mass of potassium hydrogen carbonate (KHCO3)?
A. 116 g/mol
B. 68 g/mol
C. 100 g/mol
D. 84 g/mol
My guess would be A? I got 110.1, but that's not an option.
Oh it is. It's especially bad when people waste my time with their replies that are of no use to me :)
My! Your identity crisis looks serious. You've posted 9 chemistry questions, using three different names -- Hannah, Kaylee, and Jenny.
Please use only one name for your posts.
I am so sorry to have wasted YOUR valuable time. Have you thanked Dr.Bob for all of his time and expertise?
ahaha
To find the molecular mass of potassium hydrogen carbonate (KHCO3), you need to calculate the sum of the atomic masses of all the atoms in the compound.
Let's break down the compound KHCO3:
- K represents potassium, which has an atomic mass of 39.10 g/mol.
- H represents hydrogen, which has an atomic mass of 1.01 g/mol.
- C represents carbon, which has an atomic mass of 12.01 g/mol.
- O represents oxygen, which has an atomic mass of 16.00 g/mol.
Now, let's calculate the molecular mass:
(1 × atomic mass of K) + (1 × atomic mass of H) + (1 × atomic mass of C) + (3 × atomic mass of O)
(1 × 39.10 g/mol) + (1 × 1.01 g/mol) + (1 × 12.01 g/mol) + (3 × 16.00 g/mol) = 39.10 g/mol + 1.01 g/mol + 12.01 g/mol + 48.00 g/mol = 100.12 g/mol.
So, the correct answer is C. The molecular mass of potassium hydrogen carbonate (KHCO3) is approximately 100 g/mol.