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3 years ago

How many moles of n are in 0.187 g of n2o?

Chemistry

2 answers:

Ainat [17]3 years ago

8 0

We know that the molar mass of N is 14 and O is 16, therefore the molar mass of N2O is:

molar mass N2O = 14 * 2 + 16 = 44 g/mol

The number of moles:

moles N2O = 0.187 / 44

moles N2O = 0.00425 mol

There are 2 moles of N per 1 mole of N2O hence:

moles N = 0.00425mol * 2

<span>moles N = 0.0085 mol</span>

Andreyy893 years ago

6 0

(I haven't seen it done that simply before!! VERY VERY helpful! Will be using this method on my exam thursday!! Thanks again!) ^_^

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Answer:

See explanation below

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This acid mechanism always involves carbocations, and positive charges, never negative because we are in acidic mediums.

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Then, in the third step by acid base equilibrium, the hydrogen from the reactant that attacked, is substracted from the molecule by a molecule of water (We are in acid medium, therefore, there is traces of water) and the final structure is formed.

Check picture for mechanism:

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3 years ago

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3 years ago

Write the equilibrium-constant expression for the reactionA(s)+3B(l)↽−−⇀2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq)in terms of [A], [

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3 years ago

1. Zinc reacts with steam according to the equation:

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Answer:

1) mass ZnO = 55.155 g

2) V SO2(g) = 18.289 L

Explanation:

1) Zn + H2O → ZnO + H2

∴ mass Zn = 41.6 g

∴ mm Zn = 65.38 g/mol

⇒ mol Zn = (41.6 g)(mol/61.38 g) = 0.678 mol Zn

⇒ mol ZnO = (0.678 mol Zn)(mol ZnO/mol Zn) = 0.678 mol ZnO

∴ mm ZnO = 81.38 g/mol

⇒ mass ZnO = (0.678 mol ZnO)(81.38 g/mol) = 55.155 g ZnO

2) S(s) + O2(g) → SO2(g)

∴ mass S(s) = 24 g

∴ T = 25°C ≅ 298 K

∴ P = 1 atm

∴ mm S(s) = 32.065 g/mol

⇒ mol S(s) = (24 g)(mol/32.065 g) = 0.7485 mol S(s)

⇒ mol SO2(g) = (0.7485 mol S(s))(mol SO2(g)/mol S(s)) = 0.7485 mol SO2(g)

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PV = RTn

⇒ V SO2(g) = ((0.082 atm.L/K.mol)(298 K)(0.7485 mol))/(1 atm)

⇒ V SO2(g) = 18.289 L SO2(g)

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4 years ago