Help please 1. Covalent Bonds are formed when atoms

A. Give Electrons
B. Share Electrons
C. Take Electrons

Calculate the number of moles of ethane in 100 grams

Imagine that twenty i. u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?