For chemistry I had to do a lab to prove the conservation of massI used vinegar and baking sodaFirst, I added the masses of each separately and then added them before I mixed themThen I measured the total mass again but after the reaction occurredThe mass of the first system was a half gram larger than the mass of the second.I did the same procedures on a second trial, but instead I used aluminum foil to cover the cups to prevent from gas coming outBut the mass of the system before the reaction occurred was still larger than the mass of the system after when it should have remained the same since the cups were coveredCan someone give me a possible explanation as to why the masses of the second trial were not the same when they should havePlease explain well and thank you:)
No oil, and potatoes on the rack directly at 500Cook 30 minutes, pierce longwise once and flip over, and cook 30 more or til they give when squeezedUnless they're really small, this isn't too muchBest ever potatoes.
Oil on your potato skins will give you a crispy skin (like a turkey), but oil is not necessaryA little salt on the oiled skin is also a nice touchAluminum foil is not necessary, eitherI suggest you experiment with different ways of cooking potatoes, and find one that suits YOU.
Hi luckii,No you don't need oil,but your oven does seem a little high.I would turn it down to about 300 the foil should protect the potatoes until they are doneGive them about an hour then test them with a sharp knife to see if they are cooked in the middleI hope this helps,all the bestRab
a) some gas probably still escaped from the reaction unless you had a right sealed container.which may explode if too much gas is in itb) conservation of mass isnt how it soundssometimes mass is converted to energy and hence the mass will changeThis is only noticeable in nuclear reactions though were the weight change can show up in the 3rd decimal place I believe whereas the chemical reaction weight change will only show up in the 6th decimal placeTherefore my conclusion is probably CO2 escaped from the reactionAlso, be sure to use the exact same balance as the first timeEach balance is differentBe sure to also weigh everything being used before and after the sameDon't change vessels or tin foil and such.
Are you baking them? A whole potato for baking doesn't need oilWrapped in foil, it will take about half an hour to bake(Although, your oven is REALLY hotBaking temperature is 350F)
