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3 years ago

You can do Abc or 123 doesn't matter! Just give me the anwer pls

Chemistry

1 answer:

Olenka [21]3 years ago

5 0

The fist one on the fist page is a students walking home at the same pace because the line goes straight

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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 density of an object with a mass of 40.0 g and a volume of 80.0 cm3

Komok [63]

Density = mass/volume
D = 40/80 = 0.5g
D= 0.5g

8 0

3 years ago

Help me please i'm begging you its DUE today its super easy

NARA [144]

Answer:

The answer will be listed below.

Explanation:

Kinetic Energy- Energy of motion, increases with mass

Potential Energy- Stored energy, increases with height

Both- Increases with velocity

6 0

2 years ago

Can Someone Please Help Me !!!

8090 [49]

alumunum and oxygon with 2 Al atoms and 3 oxygen atoms make alumunum trioxide hope i went full god mode right there

5 0

3 years ago

Only 20 plant species, such as rice, corn,and barely, make up the main sources of food for the entire human population.

riadik2000 [5.3K]

Answer:

I believe it would be D, to enhance the survival rate.

Explanation:

7 0

3 years ago

Read 2 more answers