# What is the weight percentage of C in C6H12O6?

1. What is the weight percentage of C in C6H12O6? Use sig figs

2. What is the molar mass of TiCl4?

3. What is the molarity of a 1.30 L solution containing 6.00g of NaCN? Use sig figs

4. Write a balanced chemical equation for the combustion of octane, C8H18

5. 20.0g each of Fe2O3 and Al are mixed together and react according to the following equation. What is the theoretical yield of Fe? Answer in grams and use 3 sig figs.

Fe2O3(s) + 2Al(s) --->Al2O3(s) +2Fe(s)

6. Using electron configurations explain why the first ionization energy decreases with increasing atomic number.

He-2377

Ne-2088

Ar-1527

Kr-1356

Xe-1176

Rn-1042

/9kj/mol

https://brainmass.com/chemistry/stoichiometry/weight-percentage-294258

#### Solution Preview

1. What is the weight percentage of C in C6H12O6? use sig figs

The atomic weights of the elements are:

The molecular weight of Glucose is:

Te percentage of Carbon by weight in the Glucose molecule is:

2. What is the molar mass of TiCl4?

The molar mass of Titanium is 47.87 grams per mole. The molar mass of Chlorine is 35.45 grams per mole.

Thus, a molecule that contains one atom of Titanium and four atoms of Chlorine has a molar mass of:

3.what is the molarity of a 1.30 L solution containing 6.00g of NaCN? use sig figs

The molarity concentration is the number of moles of solute per volume of solvate.

The molar mass of sodium is

The molar mass of Carbon is

The molar mass of Nitrogen is

Thus, the molar mass of NaCN is:

This means that each mole of NaCN weigh 49.01 grams

Therefore, 6 grams of NaCN contain:

And the ...

#### Solution Summary

The weight percentages of a compound is determined.