Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio.

Describe a group of family on the periodic table

Oxygen has three naturally occurring isotopes in the following proportions oxygen 16,99.762% (15.994 91 u); oxygen 17, 0.038000% (16.999 13 u); oxygen 18, 0.20000% (17.999 16 u). What is the average atomic mass of oxygen?

use the following formulas to answer. P=F/A P1V1=P2V2 sam shoots an arrow towards the target. if the tip of the arrow has an area of 15cm^3 and a force of 25N, what is the pressure

What are 4 energy transfer

Which compound dissolves in water but does not conduct electricity? A) table sugar B) sodium chloride C) sodium hydroxide D) hydrochloride acid

A living thing that cannot make its own food and must eat other living things for energy

Which best explains why astronauts appear weightless when they are in a space shuttle orbiting Earth? • They are falling toward Earth at the same rate as the space shuttle.

If increase the amplitude how does the velocity change? (No google)

What is the result of multiplying (2.5 * 1010) * (3.5 * 10-7) ? Use the correct number of significant digits.

What is 0.002353 to two significant figures