Help plz 50 pts to whoever helps me. A sample of C3H8 has 6.88×10^24 H atoms.
How many Carbon atoms does the sample contain?
What is the total mass of the sample?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?