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What is the molar quantity of a #20*g# mass of citric acid, whose formula mass is #C_6H_8O_7#?

Answer 1

Mateo Aguilar

Approx. #0.1# #mol#.

To get the answer in moles, we divide the mass by the molar mass:

#(20.0*g)/(192.12*g*mol^-1)# #=# #??mol#

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Answer 2

Axel Alvarado

To find the molar quantity of a substance, you need to divide the given mass of the substance by its molar mass.

The molar mass of citric acid (C6H8O7) is calculated by adding up the atomic masses of its constituent atoms:

(6 * atomic mass of carbon) + (8 * atomic mass of hydrogen) + (7 * atomic mass of oxygen)

= (6 * 12.01 g/mol) + (8 * 1.008 g/mol) + (7 * 16.00 g/mol) = 72.06 g/mol + 8.064 g/mol + 112.00 g/mol = 192.124 g/mol

Now, divide the given mass (20 g) by the molar mass to find the molar quantity:

Molar quantity = 20 g / 192.124 g/mol ≈ 0.104 mol

So, the molar quantity of a 20 g mass of citric acid is approximately 0.104 mol.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.