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2 years ago

12

Find the number of neutron in an atom represented by 45X21

1 answer:

Helga [31]2 years ago

5 0

Answer:

My school has no stationary and my teacher has no stationary

Explanation:

cuz i am smart duh

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Two different bromide solutions are mixed with each other: Solution 1 is an aqueous solution of 4.85 g aluminum bromidein 150. m

erma4kov [3.2K]

Answer:

M=0.380 M.

Explanation:

Hello there!

In this case, given those two solutions of aluminum bromide and zinc bromide, it is firstly necessary to compute the moles of bromide ions in each solution as shown below:

$n_{Br^-}^{in\ AlBr_3}=4.85 gAlBr_3*\frac{1molAlBr_3}{266.69gAlBr_3}*\frac{3molBr^-}{1molAlBr_3} =0.05456molBr^-\\\\n_{Br^-}^{in\ ZnBr_2}=7.75gZnBr_2*\frac{1molZnBr_2}{225.22gZnBr_2}*\frac{2molBr^-}{1molZnBr_2} =0.06882molBr^-$

Now, we compute the total moles of bromide:

$n_{Br^-}=0.05456mol+0.06882mol\\\\n_{Br^-}=0.12338mol$

Then, the total volume in liters:

$150mL+175mL=325mL*\frac{1L}{1000mL} \\\\=0.325L$

Therefore, the concentration of total bromide is:

$M=\frac{0.12338mol}{0.325L}\\\\M=0.380M$

Best regards!

8 0

2 years ago

One situation indicates a physical change rather than a chemical change. which situation indicates a physical change

Goryan [66]

if you were to fold a piece of paper into a bunch of pieces.

Explanation:

its just a different shape but it's still the same piece of paper

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Abel and his family are going on a road trip from Rhode Island to Alabama. The drive will take 18 hours. If they leave Rohde Isl

Igoryamba

Answer3:00pm

Explanation:

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Local winds can be caused by______heating of the earth's surface.

swat32

The correct answer is uneven

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Energy has been added to the system for the reaction to occur.

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3 years ago

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