# Which statement describes a general property of bases? They taste sour. They turn blue litmus red. They conduct an electric current in a solution. The concentration of H+ is greater than concentration of OH- .

2 months ago

## Solution 1

Guest #6877607
2 months ago

The correct answer is "They conduct an electric current in a solution. "

Acids taste sour, and they turn blue litmus paper red. Also acids such as HCl when dissociates in water it releases H⁺ ions. Thus in an acid the concentration of H⁺ is greater than OH⁻.

HCl + H₂O -> H⁺ + Cl⁻

A base such as NaOH will dissociate in water to form Na⁺ and OH⁻. The ions of an aqueous solution of base will conduct electricity.

NaOH + H₂O -> Na⁺ + OH⁻

## Solution 2

Guest #6877608
2 months ago
Hello there.

Which statement describes a general property of bases?

They conduct an electric current in a solution.

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Solution 1
1. You can't test something that you don't have the means to find the answer. For example: You can't test how mustard effects cell growth if you have no way of seeing the cells.
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The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.

### What is nitrogen dioxide ?

Chemically, nitrogen dioxide has the formula NO₂. It belongs to a group of nitrogen oxides. Millions of tons of nitric acid are produced annually for use largely in fertilizer manufacture, with NO₂ serving as an intermediary in this process. As the temperature rises, the gas turns reddish-brown.

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We can use the ideal gas equation which is expressed as PV = nRT. At a constant temperature and number of moles of the gas the product of PV is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

P1V1 =P2V2

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Solution 2

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

(At constant temperature and number of moles)

where,

= initial pressure of gas = 0.12 atm

= final pressure of gas = ?

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= final volume of gas = 7.14 L

Therefore, the final pressure of the air within the balloon is 0.04 atm.

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An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two ways he could change the metal chemically to try to identify it.
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Some of the physical changes used by the industrial chemist in order to identify it is by scratching it with other metals in order to find the hardness of it. Trying to deform it in order to find the malleability, and to heat it and measure the temperature in order to find the melting point.

Some of the chemical changes used by the industrial chemist in order to identify it is by inserting it in water to observe that whether it reacts with it or not, if the reaction is violent, then the metal belongs to either group I or group II. The other method is to insert it in acids of distinct strength and to observe its reaction. The metals belonging to the second group react briskly with acids. The other metals react gradually with acids and others are almost inert.

Solution 2

Some of the physical changes used by the industrial chemist in order to identify it is by scratching it with other metals in order to find the hardness of it. Trying to deform it in order to find the malleability, and to heat it and measure the temperature in order to find the melting point.

Some of the chemical changes used by the industrial chemist in order to identify it is by inserting it in water to observe that whether it reacts with it or not, if the reaction is violent, then the metal belongs to either group I or group II. The other method is to insert it in acids of distinct strength and to observe its reaction. The metals belonging to the second group react briskly with acids. The other metals react gradually with acids and others are almost inert.

Explanation:

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First you get 7.83 kPa = 7.83 * 10^4 Pa Then convert it to atm by using the relation 1 Pa = 9.8692 * 10^-6 atm, this gives you 7.83 kPa = 7.83 * 10^4 * 9.8692 * 10^-6 atm = 77.275836 * 10^-2 atm = 0.77275836 atm Now round to three significant digits, = 0.773 atm
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What happens when you swallow acid
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Some of the symptoms from swallowing hydrochloric acid:

-Abdominal pain
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Solution 2
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What is the product of the following chemical equation? C3H8(g) + 5O2(g) →
Solution 1

Explanation:

When a hydrocarbon burns in the presence of oxygen, it forms carbon dioxide and water and this a an example of combustion reaction.

Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow.

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Solution 2
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Phenylacetic acid, HC8H7O2 is one of the substances that accumulates in the blood of persons with phenylketonuria, an inherited disorder that can cause death. A 0.085 M solution of HC8H7O2 is found to have a pH of 2.68. Calculate the Ka value for this acid.
Solution 1

A 0.085 M solution of HC₈H₇O₂ is found to have a pH of 2.68. The Ka value for this acid is 0.00005262.

### What is phenylacetic acid?

Phenylacetic acid is an inorganic compound that contains two functional groups, one is carboxylic acid and phenol group.

pH is the value of measurement of acidity and the basicity of any liquid. It is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction. It is denoted by ka.

Given, that 0.085 M solution of HC₈H₇O₂. The pH is 2.68.

Ka = [H+][PAc-] / [PAcH]

[H+] = 10⁻²·⁶⁸ = 0.00209M = [PAc-]

[PAcH] = 0.085 = 0.00209 = 0.083

Ka = (.00209)(.00209) / (0.083) = 0.00005262

Thus, the Ka value for this acid is 0.00005262.

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Solution 2
Ka = [H+][PAc-] / [PAcH]

[H+] = 10^-2.68 = 0.00209M = [PAc-]
[PAcH] = 0.085 = 0.00209 = 0.083

Ka = (.00209)(.00209) / (0.083) = Answer Here.

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What two factors determine a molecule is polar or not
Solution 1
The two factors that determine whether or not a molecule is polar are if the individual bonds are even and the shape of the molecule. If the molecule is perfectly symmetric, the molecule will not be polar even if there are polar bonds present.

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