Question 3
When an electron absorbs energy and jumps it is:
a negative ion
in the ground state
a positive ion
in the excited state

Help please

Explanation:

Because gold is a very unreactive metal and exists as a pure substance (instead of oxides).

Answer:

22 students

Explanation:

i just answered it for a quiz and its correct

Answer:

is what a model answer key

I am going to go with yes. Imao

Answer:

36 hydrogen atoms in 3 molecules of glucose

Explanation:

The formula for one molecule of glucose is C₆H₁₂O₆

There are 12 hydrogen atoms in one molecule so in three molecules there would be 36

Answer:

c

Explanation:

because the left side of reactant is take more time to make a product than the first

The rate of these reactions should be considered as the option b. The rate of reaction A is lower.

Since Reaction A is completed in 12 seconds, and reaction B is completed in 21 seconds.

So based on this, we can say that the rate of reaction A should be lower as it contain 12 seconds as compared to reaction b.

hence, the option b is correct.

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Answer:

C

Explanation:

just took the test

Answer:

I think the compound is a chemical bound the compound o cant say I trying

Explanation:

oh the compound is a chemical substance like atoms like H2O and other atoms they have many compounds I think this should be ans

if its ans is too long you want then tell me in comment

Answer:

rain

Explanation:

rain drops are water and water us a liquid

Answer:

because its yellow

Explanation:

because rats like yellow

Answer:Atoms acquire the stable electron structure of a noble gas by losing electrons. An atom of an element in Group 1A has seven valence electrons. Among Group 1A and 2A elements, the group number is equal to the number of valence electrons in an atom of that element.

Explanation: Hope this help have an wonderful day and stay safe! :D

Answer:

2.30156

Explanation:

Answer:

2.30156

Explanation:

becuase one knot is equivalent to 1.15078, two knots is equivalent to 2.30156

Answer:constant acceleration. A steady change in velocity.

Explanation:

Answer:

A: electrons

Explanation:

Answer:

sup, how ya doin?

Explanation:

Answer: B. a chemical change

Explanation:

Answer:

frequency

Explanation:

i took the test

Answer:

the statement is true.....

Answer:

ΔE  = 13.056 ev

Explanation:

Energy associated with nth state is,

En =  -13.6/n²

For n = 1

E₁ = -13.6 / 1²

E₁ = -13.6/1

E₁ = -13.6 ev

Kinetic energy of electron = -E₁ = 13.6 ev

For n = 5

E₅ = -13.6 / 5²

E₅ = -13.6/25

E₅ = -0.544 ev

Kinetic energy of electron = -E₅ = 0.544 ev

Wavelength of radiation emitted:

ΔE = hc/λ = E₅ - E₁

by putting values,

ΔE  = -0.544ev  - (-13.6 ev  )

ΔE  = 13.056 ev

Answer:

24

Explanation:

52-28=24

Explanation:

by adding 273.15K to the given value of temperature in Celsius degree.

example:

20℃ to Kelvin

[tex]T(K)=20℃+273.15K \\

=293.15K [/tex]

Answer:

Mass = 135.66 ×10⁻²¹ g

Explanation:

Given data:

Number of molecules of CuSO₄= 5.119×10²

Mass of CuSO₄= ?

Solution:

The given problem will solve by using Avogadro number.

1 mole contain 6.022×10²³ molecules

5.119×10² molecules ×1 mol / 6.022×10²³ molecules

0.85×10⁻²¹ mol

Mass in grams:

Mass = number of moles × molar mass

Mass = 0.85×10⁻²¹ mol × 159.6 g/mol

Mass = 135.66 ×10⁻²¹ g

Answer:Beta

Explanation:

I watched the video and I got it wrong, the right answer was beta. I can’t explain why because I’ve already forgotten lol

Digestive tract have digestive enzymes which are not able to break beta linkages as  humans do not have enzymes which breakdown beta linkages.

It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.

The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.

Learn more about digestive tract,here:

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Answer: thinking

Explanation:

A mental disorder are ways of unusual feeling, or acting that are thinking. Therefore, option A is correct.

A clinically significant impairment in a person's intellect, emotional control, or behavior is what is known as a mental disorder. It is typically linked to distress or functional impairment in key areas.

Mental illness has many causes, not just one. Your genes and family history are only two examples of the many variables that can increase your risk for mental illness. Your life experiences, particularly if they occurred as a youngster, such as stress or a history of abuse.

Depression is the most prevalent mental condition, affecting an estimated 300 million individuals, and often affects women more frequently than males.

Thus, option A is correct.

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The volume of Carbon dioxide : 29.12 L

Given

CH4 (g) + 202(g) → CO2(g) + 2H2O(g)

Oxygen volume = 63.3 L

Methane volume = 29.2 L

The volume of Carbon dioxide

Solution

1 mol gas at STP = 22.4 L

mol methane :

[tex]\tt \dfrac{29.2}{22.4}=1.3[/tex]

mol oxygen :

[tex]\tt \dfrac{63.3}{22.4}=2.83[/tex]

limiting reactant : CH₄(smaller ratio:mol/reaction coefficient)

So mol CO₂ based on CH₄

From equation, CO₂ : CH₄ = 1 : 1, so mol CO₂ = 1.3

The volume =

[tex]\tt 1.3\times 22.4=29.12~L[/tex]

The volume of carbon dioxide is produced in the reaction is 29.12 L

We know that

1 mol gas at STP = 22.4 L

So,

The mol methane is

[tex]= 29.2 \div 22.4\\\\= 1.3[/tex]

Now

The  mol oxygen is

[tex]= 63.3 \div 22.4\\\\= 2.83[/tex]

Now the volume is

[tex]= 22.4 \times 1.3[/tex]

= 29.12 L

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Answer:?

?Explanation:

Answer:

I'm sure it's D.

Explanation:

They obtain evidences by recording and studying seismic waves.