tywower
  • tywower
Which of the following samples has the greatest mass? 1.4 mol Na 1.02 × 1024 atoms Na 23 g Na 6.02 × 1023 atoms Na
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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tywower
  • tywower
@JoannaBlackwelder
tywower
  • tywower
:)
JoannaBlackwelder
  • JoannaBlackwelder
Can you convert all of these to grams?

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More answers

tywower
  • tywower
23 g Na im giving u free medals sorry
tywower
  • tywower
lol i figure out the answer after i post lol
JoannaBlackwelder
  • JoannaBlackwelder
Haha, thanks, but I don't get 23 g to be the answer.
tywower
  • tywower
how so?
JoannaBlackwelder
  • JoannaBlackwelder
Because I get one of the other options to be more mass when converted to grams.
tywower
  • tywower
ooh
JoannaBlackwelder
  • JoannaBlackwelder
Do you know how to convert from moles to mass?
tywower
  • tywower
not really
JoannaBlackwelder
  • JoannaBlackwelder
Ok, let me show you. We use the molar mass. Do you know what the molar mass of Na is?
tywower
  • tywower
22.9898
JoannaBlackwelder
  • JoannaBlackwelder
Right. And that number is the number of grams in 1 mole of Na
tywower
  • tywower
yes
JoannaBlackwelder
  • JoannaBlackwelder
We need to do a conversion that cancels out the unit of mol and goes to g |dw:1434382435002:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Then we fill in the numbers|dw:1434382521787:dw|
JoannaBlackwelder
  • JoannaBlackwelder
And multiply the fractions.|dw:1434382560516:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Make sense?
tywower
  • tywower
yes
JoannaBlackwelder
  • JoannaBlackwelder
Cool, so is that more than 23?
tywower
  • tywower
haha yes..
tywower
  • tywower
lol
JoannaBlackwelder
  • JoannaBlackwelder
:-) So that is the highest so far. But we need to check the other two options too.
tywower
  • tywower
ok c:
JoannaBlackwelder
  • JoannaBlackwelder
The amounts given in atoms, we have to do two steps. First converting to moles, then to grams.
JoannaBlackwelder
  • JoannaBlackwelder
Do you know how many atoms are in 1 mol?
tywower
  • tywower
6.02 x 10^23
JoannaBlackwelder
  • JoannaBlackwelder
Great! So can you use a similar conversion to convert to moles?
tywower
  • tywower
avogadro's number
tywower
  • tywower
yes
JoannaBlackwelder
  • JoannaBlackwelder
Cool. how many moles do you get for B?
tywower
  • tywower
idk
JoannaBlackwelder
  • JoannaBlackwelder
Let me set it up for you.|dw:1434383025321:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Where do you think the numbers go?
tywower
  • tywower
1 mole
JoannaBlackwelder
  • JoannaBlackwelder
Right. :-) And?
tywower
  • tywower
6.02 x 10^23 atoms
JoannaBlackwelder
  • JoannaBlackwelder
Yep, great! So, can you find the number of moles now?
tywower
  • tywower
yes
JoannaBlackwelder
  • JoannaBlackwelder
:D
JoannaBlackwelder
  • JoannaBlackwelder
What do you get?
tywower
  • tywower
39
JoannaBlackwelder
  • JoannaBlackwelder
Did you go straight to grams? :-)
tywower
  • tywower
yes
JoannaBlackwelder
  • JoannaBlackwelder
Great!
JoannaBlackwelder
  • JoannaBlackwelder
So, can you find the grams for D?
tywower
  • tywower
23g Na
JoannaBlackwelder
  • JoannaBlackwelder
:-) So, which one has the most mass?
tywower
  • tywower
B :)
tywower
  • tywower
right
JoannaBlackwelder
  • JoannaBlackwelder
Yep!
tywower
  • tywower
An atom is determined to contain 17 protons, 18 electrons, and 18 neutrons. What are the mass number and charge of this atom or ion? mass number: 36, charge: -1 mass number: 35, charge: +1 mass number: 35, charge: -1 mass number: 36, charge: neutral
tywower
  • tywower
this one is confusing me
JoannaBlackwelder
  • JoannaBlackwelder
Ok, what does the mass number mean?
tywower
  • tywower
the total number of protons and neutrons
JoannaBlackwelder
  • JoannaBlackwelder
Good, so what do you get for the mass number?
tywower
  • tywower
35 so that eliminates a and d
JoannaBlackwelder
  • JoannaBlackwelder
Good. And do you have any ideas on how to find the charge?
tywower
  • tywower
no
JoannaBlackwelder
  • JoannaBlackwelder
Protons have a +1 charge and electrons have -1 charge.
JoannaBlackwelder
  • JoannaBlackwelder
So, since we have one more electrons, that gives us a -1 overall charge.
tywower
  • tywower
ooh ok thanks
JoannaBlackwelder
  • JoannaBlackwelder
You're welcome :-)
tywower
  • tywower
What types of questions can be answered through science and what questions are beyond the boundaries of science? Be specific and give examples to support your answer.
JoannaBlackwelder
  • JoannaBlackwelder
What do you think?
tywower
  • tywower
i just tagged u

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