Answer:
0.220 mol He
Explanation:
Hello,
Based on the ideal gas equation of state:

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Answer:
Nitric acid decomposes sodium cyanide and sodium halide. else, they precipitate in test and misguide the result. Therefore, dilute nitric acid is added before testing halogens to expel all the gases if evolved.
Answer:
A
Explanation:
3 CARBON ATOMS 8 HYDROGEN
The correct option is B. F
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