Question

#6 and #7. How many carbon atoms are in a mixture of 7.00 mol c2F2 and 0.400 mol carbon dioxide and also #7

Answer 1

Answer:

#6  8.67x10²⁴ atoms

#7  

1. Atom

2. Formula unit

3. Molecule

4. Ion

Explanation:

#6 First we calculate how many carbon moles are there in 7.00 moles of C₂F₂, keeping in mind that there are 2 C moles per C₂F₂ mol:

• 7.00 mol C₂F₂ * 2 = 14.00 mol C

As for carbon dioxide, there are 0.400 C moles in 0.400 moles of CO₂.

We calculate the total number of C moles:

• 14.00 mol + 0.400 mol = 14.4 mol C

Finally we calculate the number of atoms in 14.4 C moles, using Avogadro's number:

• 14.4 mol * 6.023x10²³ atoms/mol = 8.67x10²⁴ atoms

#7

• 1. Radon - Atom (Ra)

• 2. Formula unit (It is a crystalline solid, BaBr₂)

• 3. Molecule (NH₃)

• 4. Ion (It has a formal charge, +2)