In today’s lab, Mr. Gray asked students to weigh out 1.5 moles of CaCO3 to use for their experiment. However, the scale only sho

Question

klio [65]

2 years ago

15

In today’s lab, Mr. Gray asked students to weigh out 1.5 moles of CaCO3 to use for their experiment. However, the scale only sho

ws the amount in grams. How many grams of Calcium Carbonate are in 1.5 moles?

Chemistry

1 answer:

mrs_skeptik [129] · Answer 1 · 2023-02-20T07:27:45+03:00

Considering the definition of molar mass, the mass of 1.5 moles of CaCO₃ is 150 grams.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

<h3>Molar mass of CaCO₃</h3>

In this case, you know the molar mass of the elements is:

Ca= 40 g/mole
C= 12 g/mole
O= 16 g/mole

So, the molar mass of the compound CaCO₃ is calculated as:

CaCO₃= 40 g/mole + 12 g/mole + 3× 16 g/mole

Solving:

CaCO₃= 100 g/mole

Next, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 100 grams, 1.5 moles of the compound contains how much mass?

$mass=\frac{1.5 molesx100 grams}{1 mole}$