Question

can someone help me with this lab!!
PLease

Answer 1

You have to type in your answers first. When you are done, let me or anyone else check it for you.

Answer 2

can you help me, not do it for me but help

Answer 3

im not sure how to get the Molar Mass

Answer 4

Erase
ie: salt (NaCl)

Let say I have 2.0 gram of the salt given to me.
1. Mass of substance: 2.0g

The molar mass of my salt based on the molecule (NaCl)
2. Molar mass of substance = (22.99 + 35.45)g/mol = 58.44g/mol
* 22.99 is the molecular weight for Na and 35.45 is the molecular weight for Cl.

3. Moles of my substance: 2.0g/(#2) = 0.0342 mol

4. Moles of each element;
Na = 2.0g x (1mol/22.99) = 0.0870 mol.
Cl = 2.0g x (1mol/35.45) = 0.0564 mol.

5. Atoms of each element:
Na = 0.0870 x 6.02*10^23 = ...
Cl = 0.0564 x 6.02*10^23 = ...

...

Answer 5

ok
i getting it now

Answer 6

you made that way easier for me thank you

Answer 7

5. would be
Na 5.2374
Cl 3.39528
is this correct ?

Answer 8

@bpaulorg

Answer 9

the number is ok but you forget to put the exponential power to it.

Answer 10

ops

Answer 11

how do you put that ?

Answer 12

For Na, the correct way of doing it is 5.2374*10^22.
Exponent denoted (E) is basically '10 to the power of something' like 20, 21, 22, or other. This is all math stuff.

Answer 13

o ok thank you