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

Description of how the combined gas law must be modified to introduce the number of moles

What is the molality, m, of an aqueous solution of ammonia that is 12.83 M NH3 (17.03 g/mol) ? This solution has a density of 0.9102 g/mL.

Given that oxygen see saying and I was just going to 18 both have an atomic number of 8 how many electrons protons and neutrons does these oxygen atoms contain

How does the volume occupied by a cubic centimeter (cm3) compare with the volume occupied by a milliliter (ml) ?

Naturally occurring zirconium exists are five isotopes. axe with a mass of 89.905 u (51.45%); Zr with a mass of 90.906 u (11.22%); Zr with a mass of 91.905 u (17.15%); Zr with a mass of 93.906 u (17.38%) and Zr with a mass of 95.908 u (2.80%).

How do you know if the reaction is exothermic or endothermic if both phase are same?

How many elements are in a set whole numbers between 3 and 15

Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.

Describe 2 theories for yawning

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?