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4 years ago

Which sample of copper has atoms with the lowest average kinetic energy?

1 answer:

algol [13]4 years ago

4 0

I believe your answer is 40g 15*C I hope that helps.

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yaroslaw [1]

Rise, increase, toward, away from

i think those are your answers if u want help figuring out where to put the arrows lmk

6 0

3 years ago

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

3 years ago

Korolek [52]

Answer:the first one

Explanation:

7 0

2 years ago

lions [1.4K]

Hello,

<span>3. The parents’ phenotypes are expressed equally in the offspring’s phenotype.</span>

4 0

3 years ago

Tasya [4]

B) 0.67
Hope this helped

8 0

4 years ago