Question

plz help me ...........,...

Answer 1

ANSWERS :-


(I) 1 mole of H2SO4 = 98 gram


molar mass = (2 * 1 +1 * 32 + 4 * 16 )

= 98 gram

moles = 49/98

= 1/2 = 0.5

(ii) 1 Mole of Co2 = 22.4 letters at NTP

so,

44.8 liters of Co2 at NTP = 1 * 44.8/22.4

= 2 MOLES Co2


(iii) Number of moles in 25 gram of caco3

molar mass of Caco3 = 1 * 40 + 1 * 12 +3 * 16
= 40 +12 + 48
= 100

NOW,


✴moles = 25/100

= 0.25

(IV) 1 mole of Al = 27 g of Al (atomic mass of aluminium = 27)

now,

27 g of aluminium = 1 Mole of Al
so,

9 g of aluminium = 1 * 9 /27

= 0.33 mole of Al.


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❤BE BRAINLY ❤
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