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2 years ago

Please help me with this question it’s really confusing and I’ll give you extra credit :)) THANK YOU SMM

Chemistry

1 answer:

nignag [31]2 years ago

6 0

Answer:

it wants you to conclude what you have learned by writing if you think there is a link between the impact and the extinction of the dinosaurs by stateing any similarities to the two events and provide evidence to surpport your claim

Explanation:

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A mixture of two compounds, A and B, was separated by extraction. After the compounds were dried, their masses were found to be:

Arlecino [84]

Answer:

The percent recovery from re crystallization for both compounds A and B is 69.745 and 81.44 % respectively.

Explanation:

Mass of compound A in a mixture = 119 mg

Mass of compound A after re-crystallization = 83 mg

Percent recovery from re-crystallization :

$\frac{\text{Mass after re-crystallization}}{\text{Mass before re-crystallization}}\times 100$

Percent recovery of compound A:

$\frac{83 mg}{119 mg}\times 100=69.74\%$

Mass of compound B in a mixture = 97 mg

Mass of compound B after re-crystallization = 79 mg

Percent recovery of compound B:

$\frac{79 mg}{97 mg}\times 100=81.44\%$

3 0

2 years ago

Which sample is a pure substance?

Sunny_sXe [5.5K]

A test tube of zinc oxide

6 0

2 years ago

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How many potassium atoms are present in 0.01456 g of potassium??

leva [86]

Its going to be 2.81 x 1023 atoms

8 0

3 years ago

What would be the result on the Insect population if the Bats and Mice were removed?

Ivanshal [37]

Answer:

We wouldn't have Coronavirus

Explanation:

5 0

2 years ago

pleaaase help me asaaap for 150 points my insta is niqsariot_1 dm me for the other 50 points and pleasee answer all of the quest

liq [111]

Answer:

Just here for the points sorry

Explanation:

Minecraft I will not be able to make the weekend of this trip until Sunday evening and I will be away for the rest of the of the week weekend and I will will be back from London tomorrow for lunchtime a week or so if to for for if to go for the it a the the it a couple of rest in the morning the other week night if and time as I we are have the first one in the evening morning so I'll we have an appointment early for in a the class morning and for and then

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2 years ago