a. An undesirable constituent of air​

Answers

Answer 1

Complete Question:

Give one word for the following.

a. An undesirable constituent of air

b. The constituent of air that helps in burning

c. The thick layer of air surrounding the earth

d. Carbon dioxide does not support this process​

Answer:

a. Pollutant.

b. Oxygen.

c. Atmosphere.

d. Combustion.

Explanation:

a. Pollutant: an undesirable constituent of air. Pollution can be defined as the physical degradation or contamination of the environment through an emission of harmful, poisonous and toxic chemical substances known as pollutants. Some examples of pollutant are carbon monoxide, nitrogen dioxide, ozone, etc.

b. Oxygen: the constituent of air that helps in burning. Oxygen is an element that aids in the combustion (burning) process because it is an oxidizing agent.

c. Atmosphere: the thick layer of air surrounding the earth. It comprises of nitrogen, oxygen, carbon dioxide, argon and other gases in very small proportion.

d. Combustion (burning): Carbon dioxide does not support this process but it is an end product of the process.

Combustion can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.


Related Questions

Suppose astronomers are interested in obtaining an image of a large
area in the sky. Which radiation should astronomers observe if they
want to get images 24 hours a day, quickly and cheaply? Why?

Answers

The answer is Radio.

Why the bond in water molecule os polar covalent bond, while than in chlorine molecule is pure covalent bond? Give reason? ​

Answers

Explanation:

The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.

Sulfuric acid is an important chemical in industrial production of many products. In the “old” days, it was called oil of vitriol. It is commonly dyed brown now to alert people to its hazards because it is hugely corrosive. It is commonly found in car batteries. What is the molarity of 25.9 moles of sulfuric acid dissolved in 4.00 L of solution?

Answers

Answer:

6.475 M

Explanation:

Number of moles = 25.9 moles

Volume = 4.00 L

Molarity = ?

The relationship between the quantities is given as;

Molarity = Number of moles / Volume

Molarity = 25.9 / 4

Molarity = 6.475 M

If today is Monday and it is a 1st Quarter moon, what phase will it
be on Thursday?

Answers

Answer:

Wanning gibouss 56%

Explanation:

Waning gibbous ... I’m sadly doing this too it’s difficult but it gets easy

How do you figure out the final temperature or the initial temperature in calorimetry.

Answers

Add the change in temperature to your substance's original temperature to find its final heat. For example, if your water was initially at 24 degrees Celsius, its final temperature would be: 24 + 6, or 30 degrees Celsius.

What is the volume of 3.5 moles of chlorine gas at standard temperature and pressure (STP)? (3 points)
6.4 L
22 L
32L
78 L

Answers

Answer:

78

Explanation:

To which of the three main chemical classes does Mercury (Hg) belong?
a) It's not an element in the periodic table
b) Metalloids
c) Non-metals
d) Metals

Answers

Answer:

Metals

Explanation:

It is a transition metal

The periodic table has a lot of different properties in how it is presented, one of these, is that the elements are separated in blocks by their properties.

From its position in the table, we can see that the correct option is d) metals.

The general way of knowing if an element is a metal or not, is to look if it is the D block in the periodic table.

This block contains all the transition metals (not all the metals) but every element in it is a metal. If we look for the mercury, we can see that it is in block D, just next to gold (Au).

Just from this, we can conclude that mercury is a metal, so the correct option is d.

If you want to learn more, you can read:

https://brainly.com/question/11155928

identify NaOH (aq) + HNO3(aq) → NaNO3(aq) + H2O(1)

Answers

Answer:

this is called acid base reaction

Compare the seasons on Titan to the seasons on Earth.

Answers

Since Titan orbits roughly along Saturn's equatorial plane, and Titan's tilt relative to the sun is about the same as Saturn's, Titan's seasons are on the same schedule as Saturn's—seasons that last more than seven Earth years, and a year that lasts 29 Earth years.

If Mars’s atmosphere were 100% oxygen, would that make it like Earth’s?
Yes; Earth’s atmosphere is mostly oxygen.
Yes; the amount of oxygen in Earth’s atmosphere changes.
No; Earth’s atmosphere is mostly nitrogen.
No; Earth’s atmosphere is all carbon dioxide.

Answers

The right answer would be “No;Earths atmosphere is mostly nitrogen”
How do I know? I learned it in one of Film Theories videos lol

an atom is the smallest unit of an element that retains the ___ of that element

Answers

an atom is the smallest unit of a pure substance or element that can exist and still retain the properties of the original substance or element

7. A strong acid has a pH of
A) 0
B) 6
C) 7
D) 14

Answers

It should be A) 0
because acids are from PH0-PH6 and basics are from PH7-PH14

Hope this helps!
Good luck!

What are the number of atoms in each Chemical Formula

Answers

You can search that up online it’s not that hard but good luck !!

What are bacteria? Chapter 7 lesson 2 AYU

Answers

Answer:

a group of unicellular microorganisms

Answer:

bacteria are a type of biological cell,they constitute a large domain of prokaryotic microorganisms,single celled. The cells are all prokaryotic . This means they do not have a nucleus or any other structures which are surrounded by membranes . ... Bacteria also have small, closed-circles of DNA called plasmids present in their cytoplasm

Explanation:

True or false, the torch that is carried to the Olympic cauldron to be lit, is ignited by a match

Answers

Answer:

true

Explanation:

100 grams of liquid iron is put in liquid water when is equilibrium reached

Answers

Answer:

when the water heats up i believe

Explanation:

b

Help! Please:(
Given the following chemical equation, how many grams of water are created when 50.0 grams of oxygen react with excess hydrogen ?
2H2 + O2 - -> 2H20

Answers

Answer:

About 56.3 grams of H2O

Explanation:

Why can more sugar be dissolved in hot water than cold water (more solute be dissolved in hot solvent then cold solvent)

Answers

sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. when water is heated, the molecules gain energy and because of that, move faster. as they move faster, they come in contact with the sugar more often, causing it to dissolve faster.

How do human change the Earth's surface?

Human activities such as overpopulation can change the Earth's surface.
Human activities such as driving cars can change the Earth's surface.
Human activities such as mining and deforestation can change the Earth's surface.
Human activities such as poaching can change the Earth's surface.

Answers

I believe it is C “Human activities such as mining and deforestation can change the Earth’s surface”

Answer:

Human activities such as mining and deforestation can change the Earth’s surface

Explanation:

If more reactants are used in a chemical reaction, more products will be
produced. This is because *
1 point
More reactants have more atoms to react to form more products
More reactants take up the same volume
Too many products can slow down the reaction
More reactants cause the reaction to heat up

Answers

More reactants have more atoms to react to form more products.

(Help would be greatly appreciated, chemistry is not my strong suit) How many moles of NaCl are present in a solution with a molarity of 8.59M and 125mL of a solution?
1. 1.07g
2. 62.7mol
3. 1.07mol
4. 62.7g

Answers

Molarity is a unit of concentration defined as the number of moles of solute (the substance being dissolved) per volume of solution (the solvent in which all the solute is dissolved). Mathematically, molarity is expressed as

[tex]M = \frac{\text{ mol solute}}{\text{ L solution}}[/tex].

In this question, we are given the molarity and the volume of a solution of NaCl. We can use this information to calculate the number of moles of NaCl present in the solution. Rearranging the equation to solve for moles of solute, we multiply the molarity by the volume of the solution (the units for volume must be in liters, so 125 mL is expressed as the equivalent 0.125 L):

[tex](8.59 \text{ M})(0.125 \text{ L}) = 1.07 \text{ moles of NaCl}.[/tex]

The question asks for the number of moles of NaCl in this solution, so number 3 would be correct.

Which pH values indicate an acid soil?

Answers

Answer;

They indicate the acidity level. That is, the less pH, the more acidic

Hope it helps :)

pls help asap!!!!

3 gasses are mixed together (N2, O2, and He). The gauge of the N2 states a pressure of 1.23 atm. The gauge on the O2 tank shows 2.3 atm. The Helium gauge is broken. When the gasses are mixed, the total pressure of the tank is 6.50 atm. What is the pressure of the He?

a) 3.47 atm

b) 2.97 atm

c) 0.435 atm

d) 10.03 atm

Answers

Answer: The pressure of the He is 2.97 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

[tex]p_{total}=p_{N_2}+p_{O_2}+p_{He}.[/tex]

Given : [tex]p_{total}[/tex] =total pressure of gases = 6.50 atm

[tex]p_{N_2}[/tex] = partial pressure of Nitrogen = 1.23 atm

[tex]p_{O_2}[/tex] = partial pressure of oxygen = 2.3 atm

[tex]p_{He}[/tex] = partial pressure of Helium = ?

putting in the values we get:

[tex]6.50atm=1.23atm+2.3atm+p_{He}[/tex]  

[tex]p_{He}=2.97atm[/tex]

The pressure of the He is 2.97 atm

What type of mixture is Mayonnaise?
A. Homogeneous
B. Heterogeneous
C. Compound
D. Element

Answers

The answer is C. Element.
The answer is element

the correct formula for the diagram is
1. 2KO
2. K2O
3. K2O
4. KOK2​

Answers

Answer:

The diagram provided shows K2O, or potassium oxide.

Explanation:

Ok... so, there are two "K2O" options, so I would just choose either and hope for the best. I don't know, maybe it's a mistake...

Answer:

The answer is K2O or dipotassium Monoxide

The molar mass of two equally sized samples of unknown gaseous compounds is shown in the table. Molar Mass Comparison Gas Molar Mass A 17 g/mol B 36.5 g/mol Which statement describes the density and diffusion of both gases at STP? Gas A has a higher density and diffuses faster than Gas B. Gas A has a higher density and diffuses slower than Gas B. Gas A has a lower density and diffuses faster than Gas B Gas A has a lower density and diffuses slower than Gas B.

Answers

Answer:

Effusion  is the process of a gas being poured out through a hole diametrically smaller than the structural exit of the container.

A lighter gas effuses faster than a heavier gas.

Thus gas A has a lower density and effuses slower than Gas B.

Explanation:

The gas with a lower molar mass will have a lower density and diffuses at a slower rate. Thus gas A has a lower density than gas B and diffuses slower than gas B.

Three points should be noted here;

The density of any substance is related to the molar mass.[tex]D=M/V[/tex], where [tex]D[/tex] is the density, [tex]M[/tex] is the mass and [tex]V[/tex] is the volume of the substance.The density of the gas is directly proportional to the molar mass of the gas.

Hence the gas A has lower density and the gas B has higher density as the molar mass of A is [tex]17 g/mol[/tex] and of B is [tex]36.5 g/mol[/tex].

About Diffusion please note the below points;

Diffusion is the process of movement of a substance from the area of higher concentration to the area of lower concentration.The gas with a smaller mass will diffuse slower in rate than the gas with a higher mass.

Hence the gas A diffuses slower in rate than gas B.

Thus the correct answer is "Gas A has a lower density and diffuses slower than Gas B".

Learn more about the density of gas here: https://brainly.in/questions/16376906

5) Calculate the volume, in liters, of 3.24 x 1022 molecules
CI2

Answers

Answer: 1.12 Liters

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text {avogadro's number}}=\frac{3.24\times 10^{22}}{6.023\times 10^{23}}=0.05moles[/tex]

1 mol of [tex]Cl_2[/tex] occupy = 22.4 L

Thus 0.05 mol of [tex]Cl_2[/tex] will occupy = [tex]\frac{22.4}{1}\times 0.05=1.12 L[/tex]

A velocity-time graph shows how what changes over time?

Answers

Answer:

A velocity-time graph shows how velocity changes over time. The sprinter's velocity increases for the first 4 seconds of the race, it remains constant for the next 3 seconds, and it decreases during the last 3 seconds after she crosses the finish line.

What are some potential traits that are needed to become a super athlete?​

Answers

Answer: Confidence, strength, potential

Explanation:

[tex] \huge \boxed{ \fcolorbox{black}{pink}{Answer}}[/tex]

20 Distinguishing Personality Traits of High-Performing Athletes

1. Self Confidence. “Self-Confidence” isn't just a phrase for cheesy motivational posters. ...

2. Strong Sense of Motivation. It takes more than a shiny medal or hefty check to motivate the world's best athletes. ...

3. Inner Desire to Succeed. ...

4. Natural Goal Setter. ...

5. Self-Discipline. ...

6. Optimism. ...

7. Sense of Belonging. ...

8. Natural Leader.

Name the type of light interaction feeling hotter in a black shirt than a white shirt
1. Reflected
2. Absorbed
3. Transmittied ​

Answers

It’s absorbed The outer layer of fabric does get hotter because the black color absorbs more heat. And that heat doesn't get transmitted to the skin because of the thick fabric. But thin black clothing transmits that heat to the skin, making a person hotter
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