What is the percent abundance of Pt-196, if the average atomic mass of platinum is 195.16 and platinum has only four naturally occurring isotopes?
A)
8%
B)
25%
33%
D)
50%

The answer is 25%

What is the molar mass of a gas that has density of 2.054 g/l

What substance has a mass of 9.5g and volume of 2.1cm^3

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?