When a nonmetal bonds with a nonmetal, they form a(n) _______________

Answers

Answer 1

Answer: they form a covalent bond

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Ayala is making salad dressing. She mixes oil and vinegar in a blender until a smooth consistency is formed. Explain whether this is a heterogeneous or a homogeneous mixture and why.

Answers

Answer: The mixture formed will be heterogeneous mixture.

Explanation: When we mix oil and vinegar and blend it together to form a smooth mixture, the final mixture will still be heterogeneous in nature.

As we know that vinegar is a solution of acetic acid in water, which is polar in nature and oil is non-polar in nature.

When, we mix polar compound with a non-polar one, the resulting mixture may mix for a certain time, but after a time, we will be able to see the two layers in a mixture.

And heterogeneous mixtures are defined as the mixtures in which there is a distinct physical boundary present between the solutions in a mixture.

Hence, the mixture of oil and vinegar is a heterogeneous mixture.

Sample Response: A homogeneous mixture can only form when one of the substances can dissolve the other one. Oil and water cannot dissolve each other, so they must form a heterogeneous mixture with small particles of vinegar dispersed throughout the oil, yet not dissolved.

Explanation: Hope this Helps!

Which equation represents the total ionic equation for the reaction of HNO3 and NaOH?

Answers

Answer: H⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + OH⁻(aq) —> NO₃⁻(aq) + Na⁺(aq) + H2O(l)

Explanation:

1) The first step is understand the nature of the reactants and the kind of reaction that they carry on:

HNO₃ is an acid (nitric acid) and NaOH is a base (sodium hydroxide).

So, this is an acid base reaction, which is a double replacement reaction, whose result is a salt and water.

2) It is also helpful writing the molecular equation. And you should include the phases. This is:

HNO₃(aq) + NaOH(aq) --> NaNO₃(aq) + H₂O(l)

3) Next, you should separate each ionic compound into its ions. This is:

HNO₃(aq) = H⁻(aq) + NO₃⁺(aq), and

NaOH = Na⁺(aq) + OH⁻(aq)

4) Write the reactant side in the form of ions:

H⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + OH⁻(aq) →

5) write the product side: H+ + OH- form water and the other two ions,.althoug form the sal, if are soluble remain as ions in the solution.

NO₃⁻(aq) + Na⁺(aq) + H2O(l)

6) Write both sides:

H⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + OH⁻(aq) —> NO₃⁻(aq) + Na⁺(aq) + H2O(l)

And this last one is the total ionic equation.

Answer: The net ionic equation is written below.

Explanation:

Net ionic equation of any reaction does not include any spectator ions.

Spectator ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form.

The chemical equation for the reaction of nitric acid and sodium hydroxide is given as:

$HNO_3(aq.)+NaOH(aq.)\rightarrow NaNO_3(aq.)+H_2O(l)$

Ionic form of the above equation follows:

$H^+(aq.)+NO_3^-(aq.)+Na^+(aq.)+OH^-(aq.)\rightarrow Na^+(aq.)+NO_3^-(aq.)+H_2O(l)$

As, sodium and nitrate ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.

The net ionic equation for the above reaction follows:

$H^+(aq.)+OH^-(aq.)\rightarrow H_2O(l)$

Hence, the net ionic equation is written above.

Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant?

Answers

Answer: Avogadro's Law states that volume is directly proportional to the oles of the gas.

Explanation: Expression fro ideal gas equation:

$PV=nRT$

This law has arrived from the combination of four laws:

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

$P\propto (1)/(V)$ (At constant temperature and number of moles)

2) Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$ (At constant pressure and number of moles)

3) Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

$P\propto T$ (At constant volume and number of moles)

4) Avogadro's Law: This law states that volume is directly proportional to the number of moles of the gas at constant pressure and temperature.

$V\propto n$ (At constant temperature and pressure)

Hence, the correct answer is Avogadro's Law.

Answer:

d. Avogadro’s law

Explanation:

edge 2021

Which element is malleable and a good conductor of electricity at STP?(1) argon (3) iodine
(2) carbon (4) silver

Answers

Answer: The correct answer is option(4).

Explanation:

Malleability : It is a property of a material that under the pressure they can be drawn into thin sheets.

Conducting: It is a property of a material to allow electric current to easily pass through it.

Since both the above properties are of metals. And from the enlisted elements only one element is metal that is 'silver'.

So, the correct answer is option(4).

$\boxed{\left( 4 \right){\text{ silver}}}$ is the element that is malleable and a good conductor of electricity at STP.

Further Explanation:

The representation of all the elements in their increasing atomic numbers is known as the periodic table. Such a representation is done in the form of a table having horizontal rows called periods and vertical columns called groups.

Malleability is the property of substance due to which it can be deformed by applying pressure. The malleable materials can be drawn into thin sheets by the process of rolling or hammering. Metals are malleable in nature because these have the tendency to get deformed under pressure.

Any substance that allows the flow of electric charges through it is said to be a conductor. Conductivity is defined as the property of any conductor to permit the flow of charges through it. Metals are good conductors of heat and electricity due to the presence of free electrons in them. Such electrons act as charge carriers.

Both malleability and conductivity are the properties of metals. Since silver exists as a metal at STP, it is malleable and a good conductor of electricity. But carbon, argon and iodine are non-metals at STP so these cannot exhibit any of the mentioned properties. Therefore option (4) is correct.

Learn more:

Which property do metalloids share with nonmetals? brainly.com/question/802690
Which properties are characteristic of group 2 elements? brainly.com/question/8226316

Answer details:

Grade: High School

Chapter: Periodic classification of elements

Subject: Chemistry

Keywords: element, silver, carbon, iodine, argon, conductor, periodic table, metal, non-metals, malleability, electricity, electrons, charge carriers.

1. Ozone in Earth’s atmosphere is important because itA)absorbs harmful pollution.

B)absorbs harmful radiation.

C)helps clouds form.

D)causes rain to fall.

2.

A. a
B. b
C. c
D. d

Answers

Answer:

Explanation:

Final answer:

Ozone in the Earth's atmosphere is crucial because it absorbs most of the sun's harmful UV radiation, protecting living beings from potential health risks. The correct answer is option B.

Explanation:

The ozone in Earth's atmosphere is primarily important because it absorbs harmful radiation. More specifically, it absorbs the majority of the sun's ultraviolet (UV) radiation, which can cause a variety of health issues like skin cancer and cataracts in humans and can also be detrimental to certain types of plant and marine life. Without the protective layer of ozone, these harmful UV rays would reach Earth's surface in much larger amounts.

Learn more about Ozone here:

brainly.com/question/31987927

#SPJ6

Without the sun, life on earth would not exist. There would be no warmth, no plants, no animals, no night and day. To power itself, the sun is constantly generating a nuclear reaction in its core, in which hydrogen nuclei are combined to form helium. This process is known as __________.
A) fusion
B) fission
C) radiance
D) solar flaring

Answers

Answer: Option (A) is the correct answer.

Explanation:

The process in which two or more small nuclei combine together to result in the formation of a larger nuclei is known as fusion.

In Sun, four hydrogen nuclei combine together to result in the formation of helium atom. This combining of small hydrogen nuclei to form a large helium nuclei represents fusion process occurring inside the Sun.

Thus, we can conclude that to power itself, the sun is constantly generating a nuclear reaction in its core, in which hydrogen nuclei are combined to form helium. This process is known as fusion.

Answer: -

Without the sun, life on earth would not exist. There would be no warmth, no plants, no animals, no night and day.

To power itself, the sun is constantly generating a nuclear reaction in its core, in which hydrogen nuclei are combined to form helium. This process is known as

A) Fusion

Fusion produces a lot of energy but very little radioactive waste.

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