Based upon the following equation: P4 + 5 O2 - - > 2 P2O5 How many grams of P4 (molar mass 124 g = 1 mole) are necessary to react with 6.8 grams of O2 (molar mass 32 g = 1 mole) ?

There are mol of hydrogen in 2.8 mol of caffeine

What are the Group 1A and Group 7A elements examples of?

Diamond has a density of 3.26 g/cm3. what is the mass of a diamond that has a volume of 0.22 cm3

A compound with an empirical formula of C4H4O and a molar mass of 136 g/mol. What is the molecular formula of this compound?

A compact disc has a diameter of 11.8 cm. What is the surface area of the disk in square centimeters? In square meters?

The solubility of carbon dioxide gas in water can be increased by

How many sodium ions are there in 85 g of sodium oxide?

When sodium metal is added to water, the following reaction occurs: 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) What is the theoretical number of moles of hydrogen gas should be produced when 0.068 mol of sodium metal reacts? a. 1.0 mol H2 b. 0.

Periodicity is best defined as: the fact that elements increase in atomic mass in a regular way. the repeating nature of physical and chemical properties with increasing atomic number. the regular growth of atomic size with atomic mass.

A mixture consists of sand, salt, and iron filings. Which of the following instruments or materials would NOT be useful in separating this mixture? a. magnet b. filter paper c. screen d. water