3 years ago

When was the first published textbook containing a table identifying the first 33 elements

1 answer:

5 0

1789 -- raité élémentaire de chimie is a textbook written by Antoine Lavoisier published in 1789 and translated into English by Robert Kerr in 1790 under the title Elements of Chemistry

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Viefleur [7K]

I believe the answer is C, AgBr. I hope this helps

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3 years ago

What is the percent composition of hydrogen in water

pshichka [43]

Answer:

11.19% hydrogen and 88.81% oxygen

Explanation:

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3 years ago

How many bacteria can fit into an animal cell

melisa1 [442]

The size of most eukaryotic animal cells range from 1 - 30 micrometers while the size of, let's say coccus bacteria is between 0.5 - 1.0 micrometers. So, if the largest animal cell is filled with the largest coccus bacteria, we can say that 30 bacteria can fit inside.

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3 years ago

The half life of Radon-222 is 3.8 days. If you have a 90.0g sample of Radon-222 in the lab, how much will be left after 19 days?

statuscvo [17]

Answer:

half lives passed=5

given sample=90g

sample left=2.8125g

Explanation:

no. of half lives=total time/half life

no.=19days/3.8days

no.=5 days

after 5 half lives sample left=2.8125g

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3 years ago

Select the reagents you would use to synthesize the compounds below from benzene. Use the minimum number of steps.

iris [78.8K]

Answer:

Explanation:

For the reaction of m-bromonitrobenzene from benzene first, we need to carry out the nitration of benzene utilizing HNO3, H2SO4.

Bromination of nitrobenzene with Br2, FeBr3 outfits m-bromonitrobenzene in light of the fact that nitro group is meta coordinating for electrophile. The mechanism activity for the reaction is shown in the image below.

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3 years ago