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Topic: hello im new in here  (Read 3854 times)

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Offline newchy

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hello im new in here
« on: May 27, 2010, 01:08:09 PM »
I'm a student of bsc electrical and electronics  engineering i have a questions in our chemistry . hope to get some *delete me*
1 ) How many grams of HCl will react with 5 grams of MnO2 by
4HCI + Mn(O2) -> 2(H2)O+Mn(cl2)+(cl2)

2)How many grams Tungsten W can be obtained from 4.81 kg WO3
w(o3)-->2hn(o3)+no

3)how many grams of nitrogen dioxide NO2 required to produce 88.35 grams of nitric acid HNO3
3NO2  +  H2O    →   2HNO3  +  NO 
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Offline sjb

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Re: hello im new in here
« Reply #1 on: May 27, 2010, 01:17:47 PM »
1) How many moles is 5 grams of MnO2?
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Offline newchy

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Re: hello im new in here
« Reply #2 on: May 27, 2010, 04:16:01 PM »
excuse me?
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Offline sjb

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Re: hello im new in here
« Reply #3 on: May 27, 2010, 04:37:47 PM »
What do you understand
Quote
4HCI + Mn(O2) -> 2(H2)O+Mn(cl2)+(cl2)
to mean?
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Offline vickium

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Re: hello im new in here
« Reply #4 on: May 31, 2010, 04:27:58 PM »
Quote from: newchy on May 27, 2010, 04:16:01 PM
excuse me?

How many moles of HCl react for every 1 mole of MnO2?
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