Answer:
because its yellow
Explanation:
because rats like yellow
Geologists obtain indirect evidence about Earth’s interior by
a.
measuring pressure differences at Earth’s surface.
b.
estimating temperature inside earth.
c.
directly looking under the many layers.
d.
recording and studying seismic waves.
Answer:
I'm sure it's D.
Explanation:
They obtain evidences by recording and studying seismic waves.
When you dissolve an antacid tablet in water and it produces bubbles, what kind of change is this?
A. a physical change
B. a chemical change
C. a solution change
Answer: B. a chemical change
Explanation:
Multiple lines between two atoms in a covalent lewis dot diagram mean:
A That there are more atoms involved
B That multiple electrons are shared between the atoms
C That the atoms are not bonded
D That the bond is easier to break
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
The energy levels of an atom are occupied by
A.electrons
B.protons
C.neutrons
D.ions
Answer:
A: electrons
Explanation:
How many atoms of Hydrogen are in the 3 molecules of glucose?
3C6H12O6?
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
name the process of separating into immiseible liquid?
Answer:
Decantation
Explanation:
Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
Determine the change in energy when an electron transitions from n= to n=5?
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
Methane gas combusts according to the following
chemical equation:
CH4 (8) + 202(g) → CO2(g) + 2H2O(l)
29.2 L of methane gas is combusted with 63.3 L of
oxygen gas at STP. What volume of carbon dioxide
is produced in the reaction?
___L CO2
Your answer should be rounded to three significant figures. Do
not include units in your answer.
The volume of Carbon dioxide : 29.12 L
Further explanationGiven
ReactionCH4 (g) + 202(g) → CO2(g) + 2H2O(g)
Oxygen volume = 63.3 L
Methane volume = 29.2 L
RequiredThe 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
The calculation is as follows: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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Explain how the rock cycle works.
Be sure to include the name of each type of rock in your description.
(Igneous rock, metamorphic rock, and sedimentary rocks)
Two knots is equal to:
Answer:
2.30156
Explanation:
Answer:
2.30156
Explanation:
becuase one knot is equivalent to 1.15078, two knots is equivalent to 2.30156
Atoms acquire the stability of a noble gas by losing electrons
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
I need help, and fast, please.
The number of protons and neutrons combined in an atom of a particular element
The movement of an object toward earth Soley because of gravity is called
Answer:constant acceleration. A steady change in velocity.
Explanation:
Our digestive enzymes are able to break the alpha linkage in potatoes but not the ?? Linkage in paper
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.
What is digestive tract?
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.
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Is it a model answer key
Answer:
is what a model answer key
I am going to go with yes. Imao
This chart shows descriptions of the atoms for four different substances.
Which substance is a solid?
Object 1
Object 2
Object 3
Object 4
If you help me quickly i will give you 100 point
Answer:
Ovary
Explanation:
The ovaries are organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the fallopian tubes in the process called ovulation
Question 8 of 10 Which wave property is related to the pitch of a sound? A. Crest height B. Frequency O C. Amplitude D. Rest position
Answer:
frequency
Explanation:
i took the test
5. (03.01 LC)
Which of the following is matter in its liquid form?(2 points)
Animals
Plants
Rain
Sunlight
Answer:
rain
Explanation:
rain drops are water and water us a liquid
Symptoms of a mental disorder are ways of
unusual.
feeling, or acting that are
A. thinking
B. sleeping
C. working
D. imaging
Answer: thinking
Explanation:
A mental disorder are ways of unusual feeling, or acting that are thinking. Therefore, option A is correct.
What is mental disorder ?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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A sample of metal is heated until it melts and begins to glow red. When it cools, it appears the same color as it did before it was heated. This is evidence that a chemical reaction occurred. is it true or false
Answer:
Explanation:
trueeeeeeeeeeeeeeeeeeeeeeeeeee
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
This is actually fun. First comment is brainliest.
Answer:
sup, how ya doin?
Explanation:
Define compound in your own words
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
A student measures the time it takes for two reactions to be completed.
Reaction A is completed in 12 seconds, and reaction B is completed in 21
seconds. What can you conclude about the rates of these reactions?
A. The rates of reactions A and B are equal.
B. The rate of reaction A is lower.
C. The rate of reaction B is lower.
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.
Conclusion of the rate of reactions: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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162.4 NH3 =____mol NH3
Answer:
162.4
Explanation:
Because yea thats the answer no need to tell you why ok bye
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
why is an atom electrically neutral