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Explanation & Answer
23) Moles of C = 2x 4 = 8
24) The balanced equation is as follows:
SnO2 +2 H2 ---> Sn + 2 H2O
So, the correct option is A. 2.
25) The option A is balanced correctly.
26) Molar mass of Ca(NO3)2 = 40 + (14 +(3x16))2 = 164
So correct option is D. 164.
27)Greatest molar mass is of option C. Br2 (80x2 =160)
28) 1 mole of Cu need Fe= 1 mole
1 mole of Fe = 54 g
So correct option is D. 54g.
29)The correct option is A. 2,3,1,6.
30) 4 moles of NH3 completely reacts with O2 = 5moles
1 mole of NH3 completely reacts with O2 = 5/4
2 moles of NH3 completely reacts with O2 = (5/4) x 2 =2.5 moles
So correct option is C. 2.5 .
31) The mass of 1 mole of C-12 is 12.01 grams
So correct option is C. 12.01 grams
32) To convert Celsius into Kelvin scale, just subtract 273 from it.
So 473-273= 200 C
So correct option is C. 200
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