Answer:
0.79 moles
Step-by-step explanation:
Formula :
Number of moles = Weight of substance / molecular mass
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Here :
⇒ Weight of HNO₃ = 50 g
⇒ Molecular mass = 63 g
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Solving :
⇒ Number of moles = 50/63
⇒ Number of moles = 0.79 moles