Calculate the number of mole in 65.5 ug of carbon and 7.9mg of Ca

Answer

Well, let's get this party started! To calculate the number of moles, we need to use the molar mass of each element. The molar mass of carbon is approximately 12.01 g/mol, so let's convert 65.5 ug (micrograms) to grams:

65.5 ug = 65.5 x 10^-6 g = 6.55 x 10^-5 g

Now, let's calculate the number of moles of carbon:

moles of carbon = mass of carbon / molar mass of carbon
= 6.55 x 10^-5 g / 12.01 g/mol
≈ 5.46 x 10^-6 mol

Now, onto calcium! The molar mass of calcium is roughly 40.08 g/mol. So, let's convert 7.9 mg (milligrams) to grams first:

7.9 mg = 7.9 x 10^-3 g

Now, let's calculate the number of moles of calcium:

moles of calcium = mass of calcium / molar mass of calcium
= 7.9 x 10^-3 g / 40.08 g/mol
≈ 1.97 x 10^-4 mol

So, in summary:

- 65.5 ug of carbon is approximately 5.46 x 10^-6 moles of carbon.
- 7.9 mg of calcium is approximately 1.97 x 10^-4 moles of calcium.

Hope you enjoyed that mathematical circus act!

To calculate the number of moles in a substance, we first need to determine the molar mass of the substance.

The molar mass of carbon (C) is 12.01 g/mol.
The molar mass of calcium (Ca) is 40.08 g/mol.

Now, let's calculate the moles of each substance:

Moles of carbon (C):
Given mass = 65.5 μg
Converting to grams: 65.5 μg = 65.5 x (10^-6) g = 0.0000655 g

Number of moles = Given mass / Molar mass
Number of moles = 0.0000655 g / 12.01 g/mol

Moles of carbon = 5.457 x 10^-6 mol

Moles of calcium (Ca):
Given mass = 7.9 mg
Converting to grams: 7.9 mg = 7.9 x (10^-3) g = 0.0079 g

Number of moles = Given mass / Molar mass
Number of moles = 0.0079 g / 40.08 g/mol

Moles of calcium = 0.0001964 mol

Therefore, the number of moles in 65.5 μg of carbon is 5.457 x 10^-6 mol, and the number of moles in 7.9 mg of calcium is 0.0001964 mol.

To calculate the number of moles in a given mass of a substance, we need to use the formula:

Number of moles = Mass / molar mass

First, let's calculate the number of moles of carbon:

Given mass of carbon = 65.5 ug (micrograms)

First, we need to convert the given mass from micrograms to grams since the molar mass is usually expressed in grams.

1 gram = 1,000,000 micrograms (ug)

Therefore, the mass of carbon in grams can be calculated as:

65.5 ug * (1 g / 1,000,000 ug) = 0.0000655 g

To calculate the molar mass of carbon (C), we need to know its atomic mass. Since the atomic mass of carbon is 12 atomic mass units (amu), the molar mass of carbon is also 12 g/mol.

Now, we can calculate the number of moles of carbon:

Number of moles = 0.0000655 g / 12 g/mol ≈ 5.458 × 10^-6 mol

So, there are approximately 5.458 × 10^-6 moles of carbon in 65.5 ug of carbon.

Now, let's calculate the number of moles of calcium (Ca):

Given mass of calcium = 7.9 mg (milligrams)

First, we need to convert the given mass from milligrams to grams.

1 gram = 1000 milligrams (mg)

Therefore, the mass of calcium in grams can be calculated as:

7.9 mg * (1 g / 1000 mg) = 0.0079 g

To calculate the molar mass of calcium (Ca), we need to know its atomic mass. The atomic mass of calcium is 40.08 amu, so the molar mass of calcium is also 40.08 g/mol.

Now, we can calculate the number of moles of calcium:

Number of moles = 0.0079 g / 40.08 g/mol ≈ 0.0001967 mol

So, there are approximately 0.0001967 moles of calcium in 7.9 mg of Ca.