[HardWorker]

Dear friends,

I have two questions should be submitted Sunday 30.

I hope that I can get the answer very fast.

------1-----

Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen.
4KNO3(s) 2 K2O(s) + 2 N2(g) + 5 O2(g)

(a) How many moles of KNO3 must be heated to produce 86.6 kg oxygen?
(b) How many grams of KNO3 is this?

------------2------------------

Elemental phosphorus occurs as tetratomic molecules, P4. What mass of chlorine gas is needed for complete reaction with 394 g phosphorus to form phosphorus pentachloride?

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[agrobert]

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