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⁻
The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.
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.
Nitrogen dioxide is created when reactions between nitrogen oxide (NO) and other nitrogen oxides (NOx) and other airborne molecules occur. The burning of fossil fuels (coal, gas, and oil), particularly the fuel used in automobiles, is the largest source of nitrogen dioxide originating from human activity.
We have the number of moles of gas ( n ), by multiplying the given mass by the inverse of the molar mass of nitrogen gas, which exists in diatomic form given by
n = ( 53g ) × 128.02mol/g
= 6.78 mol
Thus, The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.
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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
P2 = P1 x V1 / V2
P2 = 0.12 x 2.31 / 7.14
P2 = 0.04 atm
Answer: 0.04 atm
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 = ?
= initial volume of gas =
= final volume of gas = 7.14 L
Therefore, the final pressure of the air within the balloon is 0.04 atm.
Answer:
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.
Answer:
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:
Some of the symptoms from swallowing hydrochloric acid:
Answer: and
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.
Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow.
Thus the products are carbon dioxide and water.
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.
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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