You have 46 grams of a compound, and you find out it has a mass % composition of: 75.7% C 8.8% H 15.5% O How many grams of C, H, and O do you have?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

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.

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?