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melisa1
17 days ago
8

Phthalic acid is a diprotic acid having the formula HO2CC6H4CO2H that can be converted to a salt by reaction with base. Which of

the following is expected to be most soluble in water? A) HO2CC6H4CO2H B) HO2CC6H4CO2Na C) HO2CC6H4CO2K D) NaO2CC6H4CO2Kand why?
Chemistry
1 answer:
KiRa [2.8K]17 days ago
5 0

Answer:

D) NaO2CC6H4CO2K

Explanation:

Water acts as a polar solvent and is known to solvate polar substances. This characteristic allows solute molecules to engage with the solvent, resulting in increased solubility of a molecule as its polarity rises. Consequently, the salt derived from phthalic acid shows greater solubility in water compared to phthalic acid itself. Although both monosodium and monopotassium salts exhibit higher solubility than phthalic acid, the dialkali phthalate salt (NaO2CC6H4CO2K) possesses the highest solubility due to its greater polarity.

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The density of air under ordinary conditions at 25°C is 1.19 g/L. How many kilograms of air are in a room that measures 10.0 ft
alisha [2865]

Answer: The air in the room weighs 37.068 kg

Explanation:

Given dimensions:

Length = 10.0 ft

Width = 11.0 ft

Height = 10.0 ft

The volume of the room (rectangular prism) is calculated using:

V=lbh

where l = length, b = breadth, h = height.

Substituting the values,

V=10.0ft\times 11.0ft\times 10.0ft=1100ft^3=31148.53L

Using the conversion: 1ft^3=28.3168L

Next, calculate the mass of the air based on density:

Density=\frac{Mass}{Volume}

1.19g/L=\frac{Mass}{31148.53L}

Mass=37066.7507g=37.068kg

Conversion: 1 kg = 1000 g

Thus, the air mass in the room equals 37.068 kilograms.

3 0
1 month ago
Read 2 more answers
The electron configuration of an element is 1s22s22p4. Describe what most likely happens when two atoms of this element move tow
castortr0y [2913]

Answer:

Cuando dos átomos se acercan entre sí, se genera un compuesto al compartir pares de electrones que cada uno de los átomos aporta, permitiéndoles alcanzar los 8 electrones de valencia (octeto) en su capa externa.

Explanation:

La configuración electrónica del elemento puede escribirse de la siguiente manera;

1s²2s²2p⁴

La configuración electrónica dada es equivalente a la del oxígeno, por lo tanto, tenemos;

El número de electrones en la capa de valencia = 2 + 4 = 6 electrones

Por consiguiente, cada átomo necesita 2 electrones para completar sus 8 electrones (octeto) en la capa externa.

Al acercarse los dos átomos, reaccionan y se combinan para formar un compuesto al compartir 4 electrones, 2 de cada átomo, de modo que cada átomo obtenga 2 electrones adicionales en su órbita externa en el nuevo compuesto y así se logre la configuración estable de octeto para cada uno de los átomos en el compuesto recién formado.

4 0
1 month ago
Read 2 more answers
Batteries work by letting charged ions flow through an electrolyte solution.
alisha [2865]

Answer:

Batteries operate by allowing charged ions to pass through an electrolyte solution.

A battery is essentially a device made up of one or more electrochemical cells capable of transforming stored chemical energy into an electric current. Each cell is comprised of a positive electrode (anode), a negative electrode (cathode), and electrolytes facilitating ion movement between the electrodes, enabling the current to flow from the battery to perform its function.

Explanation:

Its functionality is fundamentally reliant on a reversible chemical reaction known as reduction-oxidation, where one component undergoes oxidation while another is reduced; this process does not consume or lose any components but merely alters their oxidation states, allowing them to revert to their initial states under suitable conditions.

4 0
1 month ago
A laboratory analysis of an unknown sample yields 74.0% carbon, 7.4% hydrogen, 8.6% nitrogen, and 10.0% oxygen. What is the empi
Tems11 [2631]
Assuming we have a 100g sample, the mass of each element is as follows:
C: 74 g
H: 7.4 g
N: 8.6 g
O: 10 g
Next, we calculate the moles of each by dividing the mass of each element by its molar mass:
C: (74 / 12) = 6.17
H: (7.4 / 1) = 7.4
N: (8.6 / 14) = 0.61
O: (10 / 16) = 0.625
Now, we take the smallest value to determine the ratio:
C: 10
H: 12
N: 1
O: 1
Thus, the empirical formula can be expressed as
C10H12NO
3 0
1 month ago
A sealed vessel contains 0.200 mol of oxygen gas, 0.100 mol of nitrogen gas, and 0.200 mol of argon gas. The total pressure of t
Tems11 [2631]

Respuesta:

D

Explicación:

Utilizamos la relación de moles para calcular la presión parcial. El número total de moles es 0.2 + 0.2 + 0.1 = 0.5 moles

Ahora, sabemos que la fracción molar del gas argón es 0.2/0.5

La presión parcial se determina así. Para calcular esto, simplemente multiplicamos el número de moles por la presión total.

0.2/0.5 * 5 = 1.0/0.5 = 2.00atm

D

8 0
21 day ago
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