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3 years ago

What's common to H20,HF and NH3

Chemistry

1 answer:

spin [16.1K]3 years ago

3 0

Answer:

They all contain sone hydrogen atoms.

Explanation:

H is hydrogen doi

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How many atoms of N are in 0.82 g of NaNO3? ( molar conversion)

VMariaS [17]

The number of atoms N = 5.8 x 10²¹

<h3>Further explanation</h3>

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12

1 mole = 6.02.10²³ particles

mass of N in 0.82 g of NaNO₃ (MW NaNO₃: 85 g/mol) :

$\tt mass~N=\dfrac{Ar~N}{MW~NaNO_3}\times mass~NaNO_3\\\\mass~N=\dfrac{14}{85}\times 0.82\\\\mass~N=0.135~g$

moles of N :

$\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{0.135}{14}=0.0096$

The number of atoms N :

$\tt N=n\times No\\\\N=0.0096\times 6.02\times 10^{23}\\\\N=5.8\times 10^{21}~atoms$

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3 years ago

Which is the correct definition of density

xxTIMURxx [149]

The correct definition of density is the degree of compactness of a substance.

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4 years ago

Within a conventional light bulb,

aniked [119]

Answer:

Explanation:

Solid, Liquid and Gas are the states of matter. Light is neither a solid, a liquid, nor a gas.

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3 years ago

At a certain temperature, 0.660 mol SO 3 is placed in a 4.00 L container. 2 SO 3 ( g ) − ⇀ ↽ − 2 SO 2 ( g ) + O 2 ( g ) At equil

svet-max [94.6K]

Answer:

$Kc=6.875x10^{-3}$

Explanation:

Hello,

In this case, for the given chemical reaction at equilibrium:

$2 SO_3 ( g ) \rightleftharpoons 2 SO_ 2 ( g ) + O_ 2 ( g )$

The initial concentration of sulfur trioxide is:

$[SO_3]_0=\frac{0.660mol}{4.00L}=0.165M$

Hence, the law of mass action to compute Kc results:

$Kc=\frac{[SO_2]^2[O_2]}{[SO_3]^2}$

In such a way, in terms of the change $x$ due to the reaction extent, by using the ICE method, it is modified as:

$Kc=\frac{(2x)^2*x}{(0.165-2x)^2}$

In that case, as at equilibrium 0.11 moles of oxygen are present, $x$ equals:

$x=[O_2]=\frac{0.110mol}{4.00L}=0.0275M$

Therefore, the equilibrium constant finally turns out:

$Kc=\frac{(2*0.0275)^2*0.0275}{(0.165-2*0.0275)^2} \\\\Kc=6.875x10^{-3}$

Best regards.

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3 years ago

Why does a 10 ton block of steal sink to the bottom of the ocean but a 10 ton boat made of the exact same steel float?

Alchen [17]

The boat is flattened and there is more air against the surface pushing it up but a block has all weight in one place and will just sink<span />

8 0

3 years ago

What's common to H20,HF and NH3​

What's common to H20,HF and NH3