Explanation:
We have to find the net charge of a polyatomic ion that contains 49 protons and 50 electrons.
n° of protons = 49 n° of electrons = 50
The charge of each electron is -1 and the charge of each proton is +1.
charge of electron = -1 charge of proton = +1
Finally the net charge will be:
Net charge = n° of electrons * charge of electron + n° of protons * charge of proton
Net charge = 50 * (-1) + 49 * (+1)
Net charge = -1
Answer: C) -1
Answer:
your answer is b. chlorofluorocarbon(CFC
Explanation:
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Answer:
About 1.48 M.
Explanation:
The formula for molarity is mol/L.
So firstly, you must find the amount of moles in 250 grams of NaCl.
I do this by using stoichiometry. First, I find how nany grams are in a single mole of NaCl. This is around 58.44 grams/mole. Now that I know this, I can now use a stoich table. (250 g NaCl * 1 mol NaCl / 58.44 g NaCl). I plug this into my calculator.
I get that 250 grams of NaCl is equal to about 4.28 moles.
Now I just plug into the formula!
4.28 moles/2.9 L = about 1.48
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