Question

What weighs more – 2.7099 × 1023 molecules of urea (NH2CONH2) or 1.8066 × 1023 molecules
of ammonia (NH3)?[N = 14, C = 12, H = 1, O = 16]​

Answer 1

Answer:

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.

Explanation:

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Answer 2

Correct Question:-

What weighs more - 2.7099× 10²³ molecules of urea [NH₂CONH₂] or 1.8066×10²³ molecules of ammonia [NH₃]

Answer:-

2.7099×10²³ molecules of urea weighs more.

Explanation:-

For 2.7099×10²³ molecules of urea :-

Molar mass of urea [NH₂CONH₂] :-

= 14+1×2+12+16+14+1×2

= 14+2+28+14+2

= 60g/mol

Number of mole in 2.7099×10²³ molecules :-

= No of molecules/Avogadro Number

= 2.7099×10²³/6.022×10²³

= 0.45 mole

=> Mass = No of moles × Molar mass

=> Mass = 0.45×60

=> Mass = 27g

For 1.8066×10²³ molecules of ammonia :-

Molar mass of ammonia [NH₃] :-

= 14+1×3

= 17g/mol

Number of mole in 1.8066×10²³ molecules :-

= No of molecules/Avogadro Number

= 1.8066×10²³/6.022×10²³

= 0.3 mole

=> Mass = No of moles × Molar mass

=> Mass = 0.3×17

=> Mass = 5.1g

_____________________________

∵ 27g > 5.1g

∴ 2.7099×10²³ molecules of urea weighs

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