A hydrocarbon is a compound comprised of carbon and hydrogen atoms. An unknown hydrocarbon is found to have the empirical formula CH2 and has a molecular mass of 84.0 g/mol. What is its molecular formula?

C6H12

CH2

C4H8

C3H6

Which of the following was not part of democritus' theory of matter? 1. matter consists of tiny particles called atoms 2. atoms retain their identity in a chemical reaction 3. atoms are indestructible 4. atoms are indivisible

How many molecules are there in 4.00 l of oxygen gas at 500.∘ c and 50.0 torr?

Heat from the Earth's core and pressure on the remains of dead plants and animals create

How Mendeleev organize the periodic table?

What is the molar mass of phosphorus (P) ? A. 15.0 g/mol B. 30.97 g/mol C. 60.2 g/mol D. 207.2 g/mol

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?

The fundamental frequency of a violin string is 440 hz. the frequency of its second harmonic is