CHEMISTRY HIGH SCHOOL

Which pair of elements form an ionic bond with each other? 1) KCI
2) ICI
3)PCI
4) HCI

Answers

Answer 1
Answer:

Ionic bonds are formed between a metal and non-metal. Among the given compounds, KCl is the ionic compound formed from potassium metal and chlorine.

What is ionic compound?

Ionic compounds are formed by electron lose and gain between metals and non-metals. Ionic bond is the strongest type of bond.

Metals are rich in electrons and they are electropositive. They  will easily lose electrons to a non-metal to form an ionic bond. Non-metals with significant electronegativity are electron deficient and they will gain electrons from metals.

Potassium is an alkali metal in the first group and chlorine is a gas in the 17th group called halogen group. They form an ionic bond by losing electron from potassium and thus KCl is an ionic compound.

All compounds here, other than KCl are covalent compounds. Thus option 1 is correct.

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Answer 2
Answer: 1) KCl 
Potassium Chloride is an ionic bond because it exists between a metal and a nonmetal. The Potassium ion is a cation, carrying a +1 charge; the Chlorine is an anion, carrying a -1 charge. 

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Of the choices below, which is true for the relationship shown? a. It is Ka for the acid H3P2O72−. b. It is Kb for the acid H3P2O72−. c. It is Ka for the acid H2P2O72−. d. It is Kb for the acid H2P2O7
Which of the following is untrue concerning a reversible reaction?a. All reversible reactions will reach equilibrium. b. The reaction always spends equal time in the forward and reverse direction. c. There is equal processing for the concentration of reactants and products. d. The reaction could spend more time in the reverse direction than in the forward direction.

Current flowing in a circuit depends on two variables identify these variables and their relationship to current

Answers

as the electrons are pushed more by the battery, they move faster through the circuit

Final answer:

The current in a circuit is governed by voltage and resistance, as dictated by Ohm's Law. The voltage-current relationship can be linear in ohmic materials or nonlinear in non-ohmic materials.

Explanation:

The current flowing in a circuit depends primarily on two variables: voltage and resistance. This relationship is defined through Ohm's Law, which states that the current (I) in a circuit is equal to the voltage (V) divided by the resistance (R), or I=V/R.

When the voltage increases while the resistance remains constant, the current will increase. Conversely, when the resistance increases while the voltage remains constant, the current will decrease. Thus, for example, if the resistance doubles, the current is cut in half.

However, it is important to note that not all materials follow this linear relationship. Some materials, known as ohmic materials, follow Ohm's Law, while others, known as non-ohmic materials, exhibit a nonlinear voltage-current relationship.

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If a substance is ionic, then it likely will what?

Answers

There are a number of possibilities for the answer to this question, so I will address a few only:
1. Many ionic substances will dissolve completely in water to form an aqueous solution of cations and anions; this solution will conduct electricity. 
2. The substance will have a slightly lower melting point than a mid-level covalent network solid. 
3. The substance will certainly not conduct electricity as a solid. 

Answer:

The substance will certainly not conduct electricity as a solid.

Explanation:

edge

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?

Answers

Answer: Both technicians are correct

Explanation: A chemical tester and exhaust gas analyzer are two important ways to check for gasket leakage

Baking a cake is an example of -a. forming mixtures.
b. forming solutions.
c. exothermic reactions.
d. endothermic reactions.

Answers

I think the correct answer is D. Baking a cake is an example of endothermic reaction. The chemical changes happening when you bake a cake includes denaturing proteins in milk, eggs, and flour. Chemical bonds are broken and new bonds are made. To aid these changes, heat is supplied by the heat in an oven.

What is the formula for carbon tetrachloride?a. CCl
b. CCl2
c. CCl3
d. CCl4

Answers

The formula for carbon tetrachloride is CCl4. The answer is letetr D. The rest of the choices do not answer the question above.

Carefully looking at an object or process

Answers

observation

They utilize and make use of the scientific method in order to have clear basis and evidence for their investigations. Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation 
2. Hypothesis 
3. Experimentation 
4. Interpretation of data 
5. Evaluating the data 
6. Passing and recording the data 

These steps are crucial and the empirical data that these scientists obtain are very important to keep that is why research paper, thesis and dissertations exists.
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