Lactic acid (CHgCHOHCOgH) is found in sour milk, in sauerkraut, and in muscles after activity. (K, for lactic acid I 1.4 X 1074.) (a) If 2.75 g of NaCH3CHOHCO2,
To find the number of moles of NaCH3CHOHCO2, you need to divide the given mass by its molar mass.
(a) The molar mass of NaCH3CHOHCO2 can be calculated by adding up the atomic masses of each element:
Na (sodium) = 22.99 g/mol
C (carbon) = 12.01 g/mol
H (hydrogen) = 1.01 g/mol
O (oxygen) = 16.00 g/mol
So, the molar mass of NaCH3CHOHCO2 is:
(22.99 g/mol) + (1 x 12.01 g/mol) + (4 x 1.01 g/mol) + (2 x 16.00 g/mol) + (1 x 12.01 g/mol) + (1 x 1.01 g/mol) + (2 x 16.00 g/mol) = 118.09 g/mol
To find the number of moles, divide the given mass of NaCH3CHOHCO2 (2.75 g) by its molar mass (118.09 g/mol):
2.75 g / 118.09 g/mol = 0.0233 mol
Therefore, there are 0.0233 moles of NaCH3CHOHCO2.
To determine the number of moles of NaCH3CHOHCO2, we need to use its molar mass. The molar mass of NaCH3CHOHCO2 can be calculated by summing the atomic masses of its individual atoms.
Na = 22.99 g/mol
C = 12.01 g/mol
H = 1.01 g/mol
O = 16.00 g/mol
Molar mass of NaCH3CHOHCO2 = (22.99 g/mol) + (12.01 g/mol) + (3 * 1.01 g/mol) + (2 * 16.00 g/mol) + 12.01 g/mol + 16.00 g/mol
= 106.13 g/mol
Now, we can calculate the number of moles of NaCH3CHOHCO2.
moles = mass / molar mass
moles = 2.75 g / 106.13 g/mol
moles = 0.0259 mol
Therefore, there are 0.0259 moles of NaCH3CHOHCO2.