Are all elements abbreviated with one or two letters? if not name same that aren't

A compound consists of 17.6% of hydrogen and 82.4% nitrogen. Determine the empirical formula of the compound

A sample of gas has a volume of 50.0 L at 135*C. Assuming the pressure remains constant, what is the volume of the gas if the temperature is decreased to 72.0*C? 42.3 L O 84.6L O 423 L O 26.7L O 22.4L

What is formula of bauxite

How does the Bohr model show you an atom has become an ion?

Determine the hydroxide ion concentration in a solution that is 0.018 m naoh.

Acids A) are generally proton donors B) produce H + ions in solution C) are electron pair acceptors D) may include all of these characteristics

3.011 x 10^23 atoms F in grams

What would you use if you needed to determine the density of an object? balance and graduated cylinder balance and scale scale and spectroscope

What are two forms of friction that oppose the motion of a moving car

How are models related to theories and hypotheses