Ask question

Ask question

All categories

3 years ago

8

During the period from about 1800 to about 1865, the atomic weights of many elements were accurately measured. Why was this impo

rtant to Mendeleev's formulation of the periodic table?

1 answer:

tatiyna3 years ago

4 0

I believe Mendeleev formed his periodic table by atomic weight (nowadays we do it by atomic number) so he likely used those values.

You might be interested in

What happens to a gummy bear when soaking in water?

nordsb [41]

It gets huge. REALLY BIG....and tastes like jello....

8 0

3 years ago

A chemist adds 135.0 mL of a 0.21M zinc nitrate (Zn(NO3) solution to a reaction flask. Calculate the mass in grams of zinc nitra

yKpoI14uk [10]

Answer:

5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.

Explanation:

$Molarity=\frac{\text{Moles of solute}}{\text{Volume of the solution (L)}}$

Moles of zinc nitrate = n

Volume of the solution = 135.0 mL = 0.1350 L

Molarity of the solution = 0.21 M

$0.21 M=\frac{n}{0.1350 L}$

$n=0.21M\times 0.1350 L=0.02835 mol$

Mass of 0.02835 moles of zinc nitrate:

0.02835 mol × 189 g/mol = 5.358 g ≈ 5.36 g

5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.

8 0

3 years ago

Periodic Table High School Reference Sheet

Ira Lisetskai [31]

I believe it should be B

8 0

3 years ago

Dust mites are microscopic bugs that are too small to see with the dissecting microscope. to see the details of a dust mite's sk

aleksklad [387]

You are right it is D

5 0

3 years ago

Read 2 more answers

What do you think is the most important element and why? Include information

Snowcat [4.5K]

Answer:

Hydrogen

Explanation:

It is considered a special element due to its flexibility in giving up & taking in electrons, therefore making it good for organic & inorganic chemistry. Hydrogen has only one proton and one electron and is the only element which has no neutrons. it is considered as the simplest element in the universe and gives a valid reason for it to be the most abundant and common element in the universe.

Hoped this helped! If this doesn't fit your 80 word count, you could shorten it.

5 0

3 years ago