How many moles of O2 are required to completely react with 4.58 grams of H2? (Round to two decimal places)

What’s the scientific notation for the number 6,840,000,000

Chemistry worksheet - i am not sure what they are asking for exactly?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98