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3 years ago

Help me, please. I Don't get my homework.

Chemistry

2 answers:

Lisa [10]3 years ago

7 0

We’d have to be very careful because if we had our skeletons on the outside it’d be very easy to injure ourselves

Serggg [28]3 years ago

5 0

Answer:

nightmare 2.0

Explanation:

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How much mass do 2.0 moles of uranium contain

jasenka [17]

The answer is going to be 476.06.

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2 years ago

Which of the following represents the least number of molecues?

Mars2501 [29]

Answer:

Answer: a) 20g of H2O (18.02 g/mol) molecules=6.68x10^23

Explanation:

In order to find the amount of molecules of each of the options, we need to follow the following equation.

$molecules=\frac{mass(g)x6.022x10^{23}(molecules/mol) }{atomic weight(g/mol)}$

So, let´s get the number of molecules for each of the options.

$a) molecules=\frac{20(g)x6.022x10^{23}(molecules/mol) }{18.02(g/mol)}=6.68x10^{23}molecules$

$b) molecules=\frac{77(g)x6.022x10^{23}(molecules/mol) }{16.06(g/mol)}=2.89x10^{24}molecules$

$c) molecules=\frac{68(g)x6.022x10^{23}(molecules/mol) }{42.09(g/mol)}=9.73x10^{23}molecules$

$d) molecules=\frac{100(g)x6.022x10^{23}(molecules/mol) }{44.02(g/mol)}=1.37x10^{24}molecules$

$d) molecules=\frac{84(g)x6.022x10^{23}(molecules/mol) }{20.01(g/mol)}=2.53x10^{24}molecules$

the smalest number is in option a)

Best of luck.

7 0

2 years ago

What is the ground-state electron configuration of a neutral atom of manganese?.

Alchen [17]

Explanation:

elctronic configuration of manganese

Mn=1s²2s²2p⁶3s²3p⁶4s²3d⁵

ground state

Mn=Ar3d⁵4s²

note that Ar is argon

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2 years ago

Sulfur and magnesium both have two valence electrons.<br> a. True<br> b. False

Nezavi [6.7K]

It would be false sulfur has 6

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3 years ago

Which of the following do water, rust, and salt have in common?

Cloud [144]

The answer is "elements" :)

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2 years ago

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