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Alex_Xolod [135]
3 years ago
9

How many molecules are present in 3.09 mol of silicon dioxide, SiO2

Chemistry
1 answer:
Sophie [7]3 years ago
5 0

There are 1.86 x 10²⁴ molecules of Silicon dioxide, SiO₂

<h3>Further explanation </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance

Moles can also be determined from the amount of substance mass and its molar mass

1 mol = 6.02.10²³  particles

Can be formulated

\tt \boxed{\bold{N=n\times No}}

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

  • Given

3.09 mol of Silicon dioxide, SiO₂

n=mol=3.09

  • Number of molecules :

\tt N=n\times No\\\\N=3.09\times 6.02\times 10^{23}\\\\N=\boxed{\bold{1.86\times 10^{24}~molecules}}}

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(14.1.50) 0.03 mol of helium are enclosed in a cylinder with a piston which maintains a constant pressure in the helium. Initial
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A bottle of the antiseptic hydrogen peroxide is labeled 3.0% (v/v). How many mL of hydrogen peroxide are in a 400 mL bottle of t
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Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the f
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B. The pressure will decrease to half its value. P₂ = 0.5 P₁

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Explanation:

Initially, we have n₁ moles of a gas that occupy a volume V₁ at temperature T₁ and pressure P₁.

<em>What would happen to the gas pressure inside the cylinder if you do the following?</em>

<em />

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<em>Part B: Reduce the Kelvin temperature to half its original value while holding the volume constant. Express your answer in terms of the variable P initial.</em>

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n₂ = 0.5 n₁.

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P₂ in terms of the ideal gas equation is:

P_{2}=\frac{n_{2}.R.T_{1}}{V_{1}}=\frac{0.5n_{1}.R.T_{1}}{V_{1}}=0.5P_{1}

3 0
3 years ago
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