If an object has a mass of 40 grams and a volume of 20 cm3, what is its density in g/cm3? a. 0.5 b. 2 c. 40 d. 800

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

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

How much carbon is stored in the atmosphere as co2