The least abundant gas in the air is
a. Xenon, Xe
b. Oxygen, O2
c. Water, H2O
d. Nitrogen, N2

Answers

Answer 1

Answer:

A.

Explanation:

Answer 2

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.

What is element?

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

Oxygen, water, and nitrogen are the most abundant molecule on the earth. Xenon is the least abundant amongst all given option. Xenon belongs to noble gas family. So, Xenon is not reactive at all.  Xenon does not form any compound with any other element so its abundance on earth is very less.

Therefore,  Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.

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Related Questions

Which statement accurately compares the trends in atomic number and atomic mass in the periodic table

Answers

the  Answer is C

Both the atomic mass and the atomic number increase from left to right.

Answer: is C

Explanation:

Both the atomic mass and the atomic number increase from left to right

While burning coal and charcoal, you notice that coal releases more heat than charcoal. That means that the... 1. elastic energy 2.gravitational energy 3.chemical potential energy is 1.lower 2. higher in charcoal than in coal

Answers

Answer:

3). Chemical potential energy

1). lower in charcoal than in coal.

Explanation:

Chemical potential energy is defined as the energy that can be absorbed or stored in a substance's chemical bonds. It can be released when there is a change in the number of particles of the substance.

As per the question, coal releases more heat than charcoal because 'the chemical potential energy of charcoal is lower than the coal' and hence, the latter would release more heat on burning i.e. the energy that was absorbed in the chemical bonds of the substance. Hence, option 3 and 1 are the correct answers.

A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? a V b Na c Mg d Se

Answers

Answer:

B.  Na

Explanation:

To identify an atom, you simply need to look at the number of protons.  This atom has 11 protons.  On the periodic table, you can see that the element with 11 protons is sodium (Na).

Fill in the blanks below.
1. The equation shows a _________the breaking and forming of chemical bonds that leads to a change in the composition of matter
2. In the equation, CO2 is a________
3. In the equation, C6H1206 is a ___________
4. In O2, the type of bond that holds the two oxygen atoms together is a___________
5. In H2O, the type of bond that holds one of the hydrogen atoms to the oxygen atom is a________
6. The number of oxygen atoms on the left side of the equation is___________ the number of oxygen atoms on the
Chemical equation
right side.
reactant
product
nonpolar
covalent bond
polar
covalent bond
equal to
different from
hydrogen bond

Answers

Answer:

Explanation:

6CO₂ + 6 H₂O ⇄ C₆H₁₂0₆ + 6O₂

This is the chemical equation given .

1. The equation shows a __Chemical equation_______the breaking and forming of chemical bonds that leads to a change in the composition of matter.

2. In the equation, CO₂ is a___reactant_____.

3. In the equation, C₆H₁₂0₆ is a ___product________.

4. In O₂, the type of bond that holds the two oxygen atoms together is a_nonpolar_covalent bond_________.

5. In H₂O, the type of bond that holds one of the hydrogen atoms to the oxygen atom is a__polar_hydrogen bond____.

6. The number of oxygen atoms on the left side of the equation is__equal to_________ the number of oxygen atoms on the right side.

Question 2

Which statement describes a change of matter that I DIFFERENT from the others?

A

Peroxide breaking down into water and oxygen

B

Bubbles forming when a pot of water is heated

A pair of jeans soaked in water drying after hanging outside

D

A block of ice decreating in size due to a change in temperature

Answers

Answer:

A.  Peroxide breaking down into water and oxygen

Explanation:

Generally when it comes to changes, there are physical and chemical changes. In physical changes, there are no new substances been formed, however in chemical change new substances are formed.

A.  Peroxide breaking down into water and oxygen

This is a chemical change.

B . Bubbles forming when a pot of water is heated

This is a physical change

C. A pair of jeans soaked in water drying after hanging outside

This is a physical change

D . A block of ice decreasing in size due to a change in temperature

This is a physical change.

Only option A is different from the rest,hence this is the answer.

she adds 1.5 mL, 0.75 mL, and 1.2 mL. Her measurements of the oil are blank

Answers

Answer:

The total measurements of the oil is 3.45mL

Explanation:

Given

1.5 mL, 0.75 mL, and 1.2 mL.

Required

Determine the total

To get the total, we simply add the given volumes together.

[tex]Total = 1.5 mL+ 0.75 mL + 1.2 mL[/tex]

[tex]Total = 3.45mL[/tex]

Hence;

The total measurements of the oil is 3.45mL

PLEASE HELP I HAVE THIS TEST TOMORROW AM GIVING MORE POINTS THAN I SHOULD!
An unlit match contains approximately 1,000 J of chemical energy. When it burns, the match releases thermal energy and light energy. After it has burned, the remaining match contains 250 J of chemical energy. If the thermal energy was measured to be 400 J, how much light energy did the match emit? ​

Answers

Answer:

match emit 350 J light energy.

Explanation:

By law of conservation of energy,  total energy before and after reaction for an isolated system remains constant.

Total energy for unlit match = 1000 j

When it burns type of energy released

thermal energy = 400 j

light energy --> it value is unknown which we have to find

also remaining match has 250 joule of chemical energy

applying   law of conservation of energy

energy before match was unlit = energy after match was lit

1000 j = thermal energy + light energy + chemical energy of remaining match

1000 J = 400 J  + light energy + 250 J

light energy = 1000 J - 400J - 250J

light energy = 350 J

Thus, match emit 350 J light energy.

convert 0.00043 dam to hm

Answers

4.3e-5hm coverted answer

A liquid that can absorb and release huge amounts of heat energy without much change in the overall temperature of the water has what
A Has a high density capacity
B Has a high surface tension capacity
C Has a high specific leat capacity
D Has a high non-polar capacity

Answers

Answer:

Im pretty sure the answers b

Explanation:

Because if its talking about overall tempature the it means ihas tension with high surface.

Put the following elements in order according to the number of protons they contain: S; Si, Sc; Na Reorder answers 1.Si Reorder answers 2.S Reorder answers 3.Sc Reorder answers 4.Na

Answers

Answer:

he oxygen ion you have with 8 protons attracting 10 electrons is larger, ... As a result, the 3Al3+ ion will be smaller than the Si element, which has ... O<Al3+<Si<Al<O2-<Ag<Rb<Cs ... It is fairly easy to arrange the atoms according to atomic size. ... I would put it between Al and Ag .

Explanation:

The nucleus of a helium atom is identical to: A) a gamma particle B) an alpha particle C) a beta particle D) all of the above

Answers

Answer: D. All of the above

Answer:

B. Alpha Particles

Explanation:

P: Have a Nice Day!

ASAP!
A solution is made by dissolving 125 g of sodium chloride in 1.5 kg of water. What is the percent by mass?​

Answers

Answer:

8.3334%

Explanation:

You have two masses. To find the percent of sodium chloride in water by mass, you divide the mass of NaCl by water. First, make both units the same. Easiest is to convert kg into g. 1.5kg = 1500g

125g NaCl/1500g H2O = 0.0833333333 ==> 8.3334%

Differences between non-biodegradable and biodegradable.

Answers

Answer:

(simple differences)Biodegradable substances are those that degrades or break down naturally...

Non-biodegradable substances are those that do not degrades easily...

Answer:

Biodegradable substances are those that degrades or break down naturally

Non-biodegradable substances are those that do not degrades easily

Scientific predictions can best be described as: a Problems you expect to identify b Questions you expect to ask c Experiments you expect to run d Evidence you expect to find

Answers

Answer:

Explanation:a

Scientific predictions are best described as consistent data that are presented in the form of if and then. It is a solution to the problem that may be identified. Thus, option a is correct.

What is scientific prediction?

Scientific prediction is a statement that describes the events of the future that are not always correct or incorrect. In scientific research, the experiment is conducted based on the hypothesis to draw conclusions and results that are expected.

The expected results are said to be scientific predictions when they are represented in the form of "if and then" before the analysis of the experimental method and its result are done. It is an account of the events that may possibly take place under specific conditions.

Therefore, option A. scientific prediction is an expected problem.

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How can a new element be made?

Answers

Answer:

adding or removing protons

Explanation:

Elements are defined by the number of protons they have. If you add or subtract protons then that changes and makes a new element.

Answer:

by changing the number of protons in the nucleus

what are different type of plastids explain them?​

Answers

Answer:

Explanation:

There are 3 types of plastids :-

1) Chloroplasts:- The green plastids which contain chlorophyll pigments for photosynthesis.

2) Chromoplasts:-The coloured plastids for pigment synthesis and storage.

3) Leucoplasts:- The colourless plastids for monoterpene synthesis found in non- photosynthetic parts of the plants.

They are of three types:-  

a) Amyloplasts- stores starch.

b) Proteinoplasts-  stores proteins.

c) Elaioplasts- stores fats and oils.

How does scientists benefit society

Answers

Answer:

scientists benefit the society because they prove many theories, plus they are always finding new solutions to new things

Explanation:

Answer:

The scientist uses specialized training to help solve problems

faced by society.

Explanation:

A P E X

Why do scientists prefer using the Kelvin Scale of temprature?

Answers

Probably because they think it is more accurate.

Hope it helps.

They believe it’s more accurate.

1. Put 0.000 034 into scientific notation.

Answers

Answer:

3.4x10 to the power of 5

Explanation:

Answer:

My answer to the question is 3.4×10^-5.

____is used as anode for prevention of corrosion 1 aluminium 2 magnesium 3 iron

Answers

Answer:

I'm not sure but I think the answer is Cathodic protection.

Which statements differentiate DNA and RNA? Check all that apply.

Answers

DNA is 2 strands and RNA is only one strand

Answer:

A:DNA is a double helix, and RNA is a single strand.

C:DNA is involved only in transcription, and RNA is involved in both transcription and translation.

E:DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.

Explanation:

I did the test an Edge.

An air mass that originates over land in central america is most likely

Answers

Answer: An air mass that originates over land in Central America is most likely warm & dry.

List 3 common examples of physical changes

Answers

crushing a can
breaking glass
boiling water

Answer: crushing a can, boiling water, breaking a glass

Explanation:

why is sodium chloride soluble in water

Answers

Answer: because the very polar water molecules attract both the positively charged sodium ions and the negatively charged chloride ions.

2)
A barbecue is being planned for 175 people. The ice cream sandwiches for desert cost $1.68 per dozen. It is
assumed that the average number of sandwiches eaten per person will be 1.25. What will it cost to buy ice cream
sandwiches for the barbecue. Solve the problem by dimensional analysis.

Answers

Hellppp :( no one is helping me I lost 20 point because no one answer :( plssssss

Dimensional analysis is the unitary method that is used to determine the values by multiplication. The cost of the ice cream sandwiches for the barbecue is 367.5 $.

What is dimensional analysis?

Dimensional analysis has been defined in maths, physics, and chemistry to solve the problem by multiplying the given numbers to determine the values of the other data. It uses the base quantities to estimate the derived values.

Given,

Number of people at barbecue = 175

Cost of ice cream sandwiches = $1.68 per dozen

The average number of sandwiches per person = 1.25

The cost to buy ice cream sandwiches for the barbecue is estimated by the dimensional analysis as:

12 ice cream sandwiches = $1.68

1.25 ice cream sandwiches = $2.1

If it costs $2.1 for each person then 175 people costs:

$2.1 × 175 = $367.5

Therefore, it will cost 367.5 $ for the barbecue.

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Which of the following is considered to be a chemical property of matter?

Answers

Answer: Meteorhpayne

Explanation: Correct me if im wrong :(

How many significant figures are in 10.060 L?

Answers

Answer:

5

Explanation:

you have two zeros that are sandwiched in between and one following a signifincant figure after the decimal.

A small rock with the mass of 6 g is dropped into a graduated cylinder with 20 mL of water. The water rises to 23 mL. What is the density of the rock?

Answers

Answer: The density of the rock is 2g/mL. Hope this helped! :)

Explanation:

V= 3.0mL                                                               D=M/V

M= 6.0g

D=6.0g/3.0mL

D= 2.0g/mL

If you drop an object with a mass of 3.66 grams and a volume of 4 mL into a beaker containing dish soap, would it float or sink? Dish soap has a density of 0.93 g/mL

Answers

It would most definitely sink

need help asp thank you​

Answers

Answer:

formed at earths surface

Explanation:

so easy

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