Given
Mass of NO - 824 g
Molar mass of NO - 30.01g/mol
No of moles of NO = Given mass/Molar mass
No of moles of NO = 824/30.01= 27.45 mole
Hence 27.5 moles of NO are formed!
D is the answer cause two h20 + o2(g)
Thermometer
Probably a digital thermocouple with high resolution
Answer: 186.3 g of 
will be produced from 2.50 mol of K
Explanation:
The balanced chemical reaction is:
According to stoichiometry :
2 moles of K produce = 2 moles of
Thus 2.50 moles of 
will produce=
of
Mass of 
Thus 186.3 g of will be produced from 2.50 mol of K
