How many moles of methane are in 7.31 x 10^25

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

How have the greenhouse gasses increased from the year 2000 to 2018

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.