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3 years ago

What types of elements undergo ionic bonding? select one:

1 answer:

5 0

Ionic bonds are made up of elements with positive charges and a negative charges. Example: magnesium oxide (MgO).
Usually nonmetals are negative charged and metals are positive charged. therefore A NONMETAL AND A METAL is the only answer that matches the explanation.

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A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) <---> N2(g) 3H2(g) At equilibrium, it was fou

Softa [21]

Answer:

Kc for this equilibrium is 2.30*10⁻⁶

Explanation:

Equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction and the concentrations of reactants and products are held constant.

Being:

aA + bB ⇔ cC + dD

the equilibrium constant Kc is defined as:

$Kc=\frac{[C]^{c}*[D]^{d} }{[A]^{a} *[B]^{b} }$

In other words, the constant Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients by the multiplication of the concentrations of the reactants also raised to their stoichiometric coefficients. Kc is constant for a given temperature, that is to say that as the reaction temperature varies, its value varies.

In this case, being:

2 NH₃(g) ⇔ N₂(g) + 3 H₂(g)

the equilibrium constant Kc is:

$Kc=\frac{[N_{2} ]*[H_{2} ]^{3} }{[NH_{3} ]^{2} }$

Being:

[N₂]= 0.0551 M
[H₂]= 0.0183 M
[NH₃]= 0.383 M

and replacing:

$Kc=\frac{0.0551*0.0183^{3} }{0.383^{2} }$

you get:

Kc= 2.30*10⁻⁶

<u><em>Kc for this equilibrium is 2.30*10⁻⁶</em></u>

8 0

4 years ago

A hydrogen ion [h3o+] concentration of 2.68 x10-3 is best represented by which ph?

Art [367]

Log (number given) = PH

3 0

3 years ago

The acid dissociation constant of alloxanic acid is. Calculate the ph of a solution of alloxanic acid. Round your answer to deci

IceJOKER [234]

Answer:

The pH of a 4.4 M solution of boric acid is 4.3

Explanation:

at t=0 cM 0 0

at eqm

So dissociation constant will be:

Give c= 4.4 M and = ?

Putting in the values we get:

Also

Thus pH of a 4.4 M solution is 4.3

3 0

3 years ago

Despite the destruction from Hurricane Katrina in September 2005, the lowest pressure for a hurricane in the Atlantic Ocean was

ollegr [7]

Complete Question

Despite the destruction from Hurricane Katrina in Sept 2005,the lowest pressure for a hurricane in the Atlantic Ocean was measured several weeks after Katrina. Hurricane Wilma registered at atmospheric pressure of 88.2 kPa on Oct 19, 2005,about 2 kPa lower than Hurricane Katrinia. What was the difference between the two hurricanes in:

millimeters of Hg? ___ mm Hg

atmospheres? ___ atm

millibars? ___ mb

Answer:

The difference in pressure in mm of Hg is $Pg = 15.05 \ mm\ Hg$