PLEASE HELP. What is the original (LiOH] if the equivalence point of a titration is reached when 35.5 mL of 0.40 M HBr is added to 25.0 mL of LiOH?
A. 0.57 M B. 0.28 M. C. 0.014 M D. 0.024 M

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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 percent by mass of oxygen in fe2o3