Answer:
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Explanation:
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make
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Answer:
symbol= F
proton= 9
neutron= 19 I understand this is it ok for you
Answer: neutral
Explanation: there are protons and neutrons in a nucleus and there are more neutrons than protons therefore it’s neutral
Answer:
158.004 Grams of Fe2S3
Explanation:
iron(lll) sulfide = Fe2S3 = Molar mass: 207.9 g/mol
iron(lll) bromide = FeBr3 = Molar mass: 295.56 g/mol
Since we don't have the chemical equation we will have to make one I guess.
2 FeBr3 + 3 Na2S -----> 6 NaBr + Fe2S3
449 g iron(lll) bromide = FeBr3
So we have 449/295.56 = moles of FeBr3 = 1.52 Moles
So ratio is 2:1 FeBr3 to Fe2S3
So we need 0.76 moles of Fe2S3
0.76 x 207.9 = 158.004Grams
Answer:
0.013 moles Cl
Explanation:
Grams --> Moles Divide by Molar Mass
Molar Mass of Chlorine (Cl) is 35.5. This can be found on the Periodic Table.
Set Up: (0.456 g Cl) (1 Cl / 35.5 g)
0.456 g * 1 = 0.456
0.456 / 35.5 = 0.01284507
Round to 0.013
