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.
How many moles of H3PO4 are contained in 150.0 mL of 18.1 M H3PO4?
Answer:
Number of moles = 2.72 mol
Explanation:
Given data:
Number of moles of H₃PO₄ present = ?
Molarity of solution = 18.1 M
Volume of solution = 150.0 mL (150/1000 = 0.15 L)
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
By putting values,
18.1 M = number of moles / 0.15 L
Number of miles = 18.1 M × 0.15 L
Number of moles = 2.72 mol
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
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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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
what is the chemical name for carbon?
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
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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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.
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
Help ASAP
Avocados have a pH of 6.27. Avocados are categorized as...
O Base
O An Acid
O Neutral
Answer:
Base
Explanation:
The movement of an object toward earth Soley because of gravity is called
Answer:constant acceleration. A steady change in velocity.
Explanation:
What do the two arrows in the diagram most likely represent?
O radiation
O photosynthesis
cellular respiration
Oenergy transfers
The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) polymerization C technology D) modification
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
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
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
A soccer ball was kicked it had the mass of .42 kg and accelerated at 25m what is the force
Which sphere is dependent on all the other spheres in order to exist?
hydrosphere
lithosphere
atmosphere
biosphere
Answer:
biosphere
Explanation:
Living things need water (hydrosphere), chemicals from the atmosphere, and nutrients gained by eating things in the biosphere.
Why is a map considered a model?
Answer:
Every map is a representation of reality, thus a model in the broadest sense. Sometimes mapping is distinguished from modelling by stating that mapping is a simple representation of reality, while modelling is trying to cover more complexity in reality.
Explanation:
If an atom has a mass number of 52 and has 28 neutrons, what is the atomic number?
Answer:
24
Explanation:
52-28=24
Lipase is an enzyme that breaks down the fat in food molecules into smaller molecules. Which of the following best describes the function of lipase?
This is actually fun. First comment is brainliest.
Answer:
sup, how ya doin?
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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5.Are pure solids included in equilibrium expressions? Explain your answer.
Answer:
Pure solids or liquids are excluded from the equilibrium expression because their effective concentrations stay constant throughout the reaction. The concentration of a pure liquid or solid equals its density divided by its molar mass.
Explanation:
Hope this helps!!!
I need help, and fast, please.
The energy levels of an atom are occupied by
A.electrons
B.protons
C.neutrons
D.ions
Answer:
A: electrons
Explanation:
Is there currently a cure for HIV
Answer:
No
Explanation:
There are vaccines, to prevent it, made by Dr. Fauci, but no cure
if you started with 2.34 grams of methane and 8.32 grams of oxeygyn and the combustion reaction went to completion how many grams of CO2 would be produced
Answer:
Mass of CO₂ produced = 5.72 g
Explanation:
Given data:
Mass of methane = 2.34 g
Mass of oxygen = 8.32 g
Mass of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 2.34 g/ 16 g/mol
Number of moles = 0.146 mol
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 8.32 g/ 32 g/mol
Number of moles = 0.26 mol
Now we will compare the moles of carbon dioxide with oxygen and methane.
CH₄ : CO₂
1 : 1
0.146 : 0.146
O₂ : CO₂
2 : 1
0.26 : 1/2×0.26 = 0.13 mol
Less number of moles of CO₂ are produced by oxygen thus oxygen will react as limiting reactant.
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 0.13 mol × 44 g/mol
Mass = 5.72 g
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
why is an atom electrically neutral