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3 years ago

If a 28.0 L balloon with a temperature of

Chemistry

1 answer:

Alexeev081 [22]3 years ago

6 0

Answer:

5.6 L

Explanation:

We can apply Charles' Law here since our pressure is constant (will not change inside the refrigerator) and we are relating change in volume with change in temperature:

V₁ / T₁ = V₂ / T₂ where V₁ and T₁ are initial volume and temperature, and V₂ and T₂ are final volume and temperature. Let's plug in what we know and solve for the unknown:

28.0 L / 25 °C = V₂ / 5 °C => V₂ = 5.6 L

5.6 L is our new volume (at 5 °C).

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The molar concentrations for the reactants and products at equilibrium are found to be [HCl]=0.80 M, [O2]=0.20 M, [Cl2]=3.0 M, a

olga nikolaevna [1]

Answer:

$\large \boxed{990}$

Explanation:

4HCl + O₂ ⇌ 2Cl₂ + 2H₂O

E/mol·L⁻¹: 0.80 0.20 3.0 3.0

$K_{\text{eq}} = \dfrac{\text{[Cl$_{2}$]$^{2}$[H$_{2}$O]$^{2}$}}{\text{[HCl]$^{4}$[O$_{2}$]}} = \dfrac{3.0^{2}\times3.0^{2}}{0.80^{4}\times 0.20} = \mathbf{990}\\\\\text{The $K_{\text{eq}}$ value is $\large \boxed{\mathbf{990}}$}$

3 0

3 years ago

Read 2 more answers

Draw the structures of the following compounds from their names: Pentane 3-methyl-hexane 2,4-dimethylpentane

Monica [59]

I am assuming that the compounds given are Pentane, 3-methyl-hexane, and 2, 4-dimethylpentane considering that the compounds were not separated by a comma.

_______________________________________________________

Pentane is in the form of a straight chain alkane. This is important as there are many isomers of Pentane, taking different shapes. By it's name it consists of 5 carbon atoms, and the number of hydrogen atoms should be 12, as the compound is nonpolar.

3-methylhexane is an alkane present in a hexane structure at position 3. There are thus 3 molecules at 3 ends of a hexane structure - H3C, CH3, and CH3

2,4-dimethylpentane is an alkane with respect to the formula [(H3C)2CH]2CH2.

With that information, refer to the three attachments below, for each compound given. They are in order -

8 0

3 years ago

Significant digits of 1.0 x 10^-2

son4ous [18]

There's two sig figs: the 1 and the zero. The 10^-2 contributes no sig figs.

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4 years ago

#3 of thermo terms

Evgesh-ka [11]

Answer:

Explanation:

If the enthalpy change (i.e. ΔH) of a reaction is negative, then the reaction releases heat and is hence exothermic.

Hence, our answer is C.

Conversely, if ΔH is positive, the reaction absorbs heat and is endothermic.

ΔH tells us nothing about the speed of the reaction.

While ΔH influences free-energy change (ΔG = ΔH - TΔS), we cannot predict the sign of ΔG given only ΔH (recall that a reaction is spontaneous if ΔG < 0).

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3 years ago

How many unpaired electrons are present in the ground state of an atom from each of the following groups?

Paha777 [63]

Explanation:

General electronic configuration for the given groups are as follows.

For 4A(14) : $ns^{2}np^{4}$