Which statement most accurately expresses themain idea of this passage?
(1) Information technology will make it easier to
buy and sell goods.
(2) Information technology will make capitalism
obsolete.
(3) Government must regulate the information
technology industry.
(4) The costs of information technology will
outweigh its benefits.
Answers
The statement that most accurately expresses the main idea of this passage is that the information technology will make it easier to buy and sell goods. Therefore, option 4 is correct.
What is an information technology ?
The use of computers to create, process, store, retrieve, and exchange various types of data and information is known as information technology. IT is a component of information and communication technology.
In its most basic form, the term IT (Information Technology) refers to any task that involves the use of a computer. IT refers to the use of technology in an organization to crunch data and solve business problems.
The statement that most accurately expresses the main idea of this passage is that the information technology will make it easier to buy and sell goods.
Thus, option 4 is correct.
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The statement that most accurately expresses the main idea of this passage is that The costs of information technology will outweigh its benefits. The answer is number 4. The rest of the choice do not answer the question above.
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A fossilized animal that was killed by a volcanic eruption has 6.25 percent of its original amount of carbon-14 remaining; this radioisotope has a half-life of 5730 years. How long ago did the volcano erupt?a) 34,380 years agob) 22,920 years agoc) 17,190 years agod) 9,168 years ago
Which process is exothermic?(1) boiling of water(2) melting of copper(3) condensation of ethanol vapor(4) sublimation of iodine
B) what mass of iron(lll) oxide, Fe2O3, must be consumed to prepare 2.50g of iron metal
Answers
One mole of dihydrogen is required to form one mole of iron, hence you'll need
B) Likewise : 2.50g of Iron is
Answers
Mg + Cl2 --> Mg2+ + 2Cl-
The reduced substance is the substance that the gained electron/s.
Looking at the substances:
Mg has a neutral charge, after the reaction, it gained a charge of 2+. This means, it lost 2 electrons.
Cl2 has a neutral charge, after the reaction, it gained a charge of -1. This means it gained 2 electrons.
Therefore, the reduced substance is Cl2.
the reduced substance is Cl2.
Answers
Answer: 238.6 J
Explanation:
1) Chemical energy is indicated as enthalpy
2) Energy balance:
∑ enthalpy of the reactants + energy added = ∑ enthalpy of the products + energy released.
3) ∑ enthalpy of the reactants = 85.1 J + 87.9 J = 173 J
4) energy added = 104.3 J
5) ∑ enthalpy of the products = 38.7 J + D
6) energy released = 0
7) Equation:
173J + 104.3J = 38.7 + D + 0
⇒ D = 173J + 104.3J - 38.7J = 238.6J, which is the chemical energy of the product D.
Answer:238.6 J
Explanation:
Answers
Answer: Option (3) is the correct answer.
Explanation:
Molecular substances are the substances which have two or more different atoms attached together.
Molecular substances have weak intermolecular forces of attraction thus, they have low melting and boiling point.
They have poor electrical conductivity as the bond formation in molecular compounds is covalent. Therefore, they also have poor heat conductivity.
Hence, out of the given options low melting point is the characteristic property of molecular substances.
Answer is: 3) low melting point.
Molecular substances are usually gases and liquids with low melting point.
The melting point depends on the strength of the intermolecular forces.
Intermolecular forces are the forces between molecules.
Molecular substances have bad heat conductivity and electrical conductivity.
Molecular substances are bonded with covalent bonds.
Answers
The main distinction between ionic and covalent bonding is that ionic bonding is the complete transfers of electrons between atoms whereas covalent bonding is the sharing of electrons between atoms.
Final answer:
The main difference between ionic and covalent bonding is the way electrons participate in the bonding. In ionic bonds, electrons are transferred and attract each other due to opposite charges. In contrast, covalent bonding involves sharing of electron pairs between atoms, usually resulting in stronger bonds.
Explanation:
The main distinction between ionic and covalent bonding is the way in which the electrons are involved. In an ionic bond, electrons transfer from one atom to another, resulting in a positive and a negative ion that attract each other due to opposite charges. The energy change associated with ionic bonding depends on three key processes; the ionization of an electron from one atom, the acceptance of the electron by the second atom, and the Coulomb attraction of the resulting ions.
On the other hand, the covalent bond involves sharing of electrons between two atoms. These electrons move back and forth between the atoms and do not permanently stay with one atom. Because of this shared electron pair, covalent bonds are stronger than ionic bonds.
Deciding whether a bond is ionic or covalent often involves considering the types of atoms involved and their relative positions on the periodic table. Bonds between two nonmetals are generally covalent, while bonding between a metal and a nonmetal is often ionic by nature.
Learn more about Ionic and Covalent Bonding here:
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(2) hydroxide ions as the only positive ions
(3) hydronium ions as the only negative ions
(4) hydronium ions as the only positive ions
Answers
Answer: Option (1) is the correct answer.
Explanation:
Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.
The chemical equation for this dissociation is as follows.
Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.
Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.