How many mL of a 8.0 M stock solution of sulfuric acid would be needed to make 200.0 mL of a 4.0 M solution? *
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Iknow #2 is d. i just need to know why

Label a-f based on the table using c for concentrated and d for dilute

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?