Answer:
1.09 x 10²⁴ atoms Na
Explanation:
In one mole of NaCl, there is also one mole of Na. To convert between moles and atoms, you need to use Avogadro's number. When writing the conversion, the desired unit (atoms) should be placed in the numerator to allow for the cancellation of units (moles). The final answer should have 3 sig figs to match the given number (1.81 mole).
Avogadro's Number:
6.022 x 10²³ atoms = 1 mole
1.81 moles Na 6.022 x 10²³ atoms
--------------------- x -------------------------------- = 1.09 x 10²⁴ atoms Na
1 mole
Answer:

Explanation:
Hello!
In this case, for the separation of the benzene-toluene mixture, we can use the following mole balances including the given mole fraction at each stream per species:

That can be solved by using a solver for P1 (benzene-rich flow) and P2 (toluene-rich flow):

Best regards!
They are very stable (not reactive).
This is because their outer shell has a total of 8 valence electrons. All elements strive to get towards a full outer shell, but since these elements already have a full outer shell, they are fairly unreactive.
Answer:
A walkthrough for a sample titration calculation for all levels of chemistry. ... Now that gives us the moles of Fe2+, but it's asking for how many grams there are. ... The molar mass of iron is about 55.8, so we'll just put that.
অনুপস্থিত: 80%
Explanation:
It is false, hope this helps!