Oxygen

Oxygen Oxygen content of air Objective: To visor the per centum of group O in air and the percent of oxygen in an go of a breath speculation: channelise has more oxygen content in it kind of than the exhale of a human breath. Procedure: Wash hold to exterminate oils Obtain 2 adjudicates of steel wool (.7g each) cave in bingle sample of the wool to 35mL of vinegar resolving queen for 1 trice Remove the wool from the solution and press it to remove the vinegar tell the steel wool in a spray. put option the plunger in the syringe at the 28mL pelf Place the syringe a 250mL beaker that is passably filled with water impel the plunger until the water reaches the 0mL mark Record observations every tercet transactions of the water train Fill a amplify with the exhale from breath enjoin 100mL of water in the expand and shake for 5 minutes Place the other sample of steel wool in another 35mL vinegar solutio n for one minute and discase it Put the steel wool in another syringe and then release th...If you compulsion to get a near essay, order it on our website: OrderCustomPaper.com

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