How many moles are in 6.2g of chromium?

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.

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?