An experimentalist, letting 6.42 grams of aluminum reacting with excess H2SO4 colleges 0.571 grams of hydrogen as one of the products of the reactionDetermine the percentage yield of hydrogen in this experiment, given the balanced reaction is:2Al + 3H2SO4 -gt; Al2(SO4)3 + 3H2The answer I got was 80%I was marked wrong for it and want to know if he made a mistake so I can go and get it checked out.
he's a fiesty little thing and i say that because my cat does that too.
my cat love to play with them.its probably because of the noise they make
I really think it's just because they like playing with them since they make noiseOur cats will pounce on them constantly and sometimes one will hide inside and then jump on the other catThey just think they are fun toysSometimes they will bite them and chew a bit of the paper or plastic, but I don't think they are really trying to eat itIt is just a side effect of the games they are playing.
You have done the problem correctly, however you have rounded to the wrong number of significant figuresYou must have the number of sig figs in your answer as are in the data with the least sig figsBoth of your given data sets have 3 sig figs, so your answer needs to have 3 sig figsmoles Al 6.42 g / 26.98 g/mol 0.23795 mol moles H2 possible 3/2 x moles Al 0.3569 mol mass H2 possible moles x molar mass 0.71957 g % yield 0.571 g / 0.71957 g x 100/1 79.3529 % 79.4 % (3 sig figs) Frankly, if the question was worth more then 1 mark and you had to show your work then I would be trying to get marks for having used the correct methodIf it was multiple choice you probably have no hope.
So many reasonsPica is one, and I see lots of good info on that posted hereI have had cats who liked all plastics in particular over any other materials associated with pica and chewed on vinyl blinds, handles on purses, grocery bags, Naugahyde furniture, etcA vet told me that it might taste sweet to them, but I've also read that cats do not have a strong sense of sweet tasteOf course they are individualsI think it may feel good to your cat to chomp on the plasticCats do like to eat roughage-they will eat the grass on their own if they go outdoors and eat other greens in the belly of a rabbit, etc., that they catch for food, so maybe the texture of the bag makes the cat think it's roughageDo you give your cat greens in a pot? You can get them at the pet store, and they love themI buy them once a month or so for my catsMine are strictly indoor petsI think it's more likely that the cat is wanting greens, if you don't provide them, vsit being pica, but if the cat also sucks on fabric, etc., then it could be picaI think eating the plastic bags, could be dangerous, if it gets in the cat's throatCould block the windpipe and suffocateMy cats hate the rustling sound of plastic bags and run they hear them!
