Answer:the correct answer is A.To open an artery near the heart
Explanation:I just took the test :)
A stent is used to open an artery near the heart and the correct option is option A.
A stent is commonly used in medical procedures to open up narrowed or blocked arteries near the heart. It is a small, mesh-like tube typically made of metal or synthetic materials. The stent is inserted into the affected artery and expands, effectively widening the artery and improving blood flow. This procedure is known as coronary angioplasty or stenting.
The narrowing or blockage of arteries can occur due to atherosclerosis, a condition in which plaque builds up on the artery walls. This can lead to reduced blood flow and potentially result in chest pain (angina) or even a heart attack. By placing a stent, the artery is opened up, allowing for improved blood flow to the heart muscle.
Thus, the ideal selection is option A.
Learn more about Stent, here:
https://brainly.com/question/30477421
#SPJ6
what is a biom what dose it do and why is it a thing lol
Answer:
a major ecological community, extending over a large area and usually characterized by a dominant vegetation.
Observations and Conclusions
What charts, tables, or drawings would clearly show what you have learned in this lab?
Each chart, table, or drawing should have the following items:
a. An appropriate title
b. Appropriate labels
Answer:
The answer is going to be a.)An appropriate title
Explanation:
This is because the charts,tables,or drawing's that you're learning are always going to be an appropriate title
Nearly all weather occurs in the layer of the atmosphere called the ____
Answer:
Troposphere where the humans live and the lowest level of layer of atmosphere
For the reaction A(g)
* 2B(g) the
following concentrations where measured
at 25°C. The Kc for this temperature is 1
Is the reaction at equilibrium?
[A] = 4 M
[B] =2 M
Answer:
Yes
Explanation:
By definition, the equilibrium constanct, Kc, for the reaction A ⇒ 2B is
= [A]^1 / [B]^2
Substitute [A] = 4 and [B] = 2 in the equation,
[A]^1 / [B]^2
= 4^1 / 2^2
= 1
= Kc
So yes the reaction is at equilibrium.
Let's find K_c
[tex]\\ \rm\Rrightarrow K_c=\dfrac{[B^]^2}{[A]^1}[/tex]
[tex]\\ \rm\Rrightarrow 1=\dfrac{2^2}{4}[/tex]
[tex]\\ \rm\Rrightarrow 1=\dfrac{4}{4}[/tex]
[tex]\\ \rm\Rrightarrow 1=1[/tex]
Yes it's at equilibrium
The equation for the pH of a substance is pH = –log[H ], where H is the concentration of hydrogen ions. A basic solution has a pH of 11. 2. An acidic solution has a pH of 2. 4. What is the approximate difference in the concentration of hydrogen ions between the two solutions?.
The approximate difference in the concentration of hydrogen ions between the two solutions is 8.7.
What is pH?
pH is the measure of how acidic and basic a liquid is. The full form of pH is potential hydrogen.
By the formula of pH
pH = -log [H +]
[tex][H^+] = 2 \times 10 ^ -^9[/tex]
[tex]pH = -log (2 \times10 ^ -^9)[/tex]
pH = 8.7
Thus, the pH difference is 8.7.
Learn more about pH, here:
https://brainly.com/question/15289741
Can someone help me??? Please
Mechanical waves travel best through a
medium while electromagnetic waves
travel best through a
A. vacuum
B. solid
C. liquid
D. gas
[tex]\huge{\color{magenta}{\fcolorbox{magenta}{black}{\huge{\color{white}{\fcolorbox{aqua}{black}{✿ᴀɴsᴡᴇʀ✿}}}}}}[/tex]
vaccum
Explanation:
vaccum is your answer
I hope you help
Can someone please help me on this?
Answer:
c
Explanation:
please add me as brainliest
A transverse wave that has electrical and
magnetic properties is known as
A. magnetism
B. loudness
C. electricity
D. electromagnetic energy
When 84. 8 g of iron (III) oxide reacts with an excess of carbon
monoxide, iron is produced.
Fe2O3(s) + 3C0 (9) > 2 Fe(s) + 3 CO2 (g)
What is the theoretical yield of iron?
Answer:
Use the balanced equation to determine the theoretical yield. Focus on the chemicals whose quantities you are given or are asked to find. CO is not important as it is excess and will make sure that all of the Fe2O3 will be changed to iron. Remember the quotients (numbers in front of formula) are the number of moles. You are given the mass of Fe2O3 in grams so you will need to convert 1 mole of Fe2O3 into grams (molar mass which, using simple atomic masses = 56x2 + 16x3 = 160g/mol but you use atomic masses that your course requires
Fe2O3(s) + 3CO(g)--> 2Fe(s) + 3CO2(g)
1 mol 2 mol
160g 112g
84.8g (112/160) x 84.8
So now you have the theoretical yield of Fe2O3 and the experimental (actual) yield = 54.3g)
Percentage Yield = (actual yield/theoretical yield) x 100
(◠‿◕)
The solar system is the collective name for the sun, eight planets, and their moons. The
blank is the center of the solar system, and everything orbits around it.
Answer:
The sun
Explanation:
The sun is the center of the solar system and all the planets orbit around it (moons orbit around respective planets which orbit around the sun)
Answer:
The Sun.
Explanation:
☀️
The Sun is like the “power house” of the solar system, we rely on it, and everything orbits around it.
What do chemical equilibrium constants tell us about the reaction?.
Answer:
Equilibrium Constant Definition An equilibrium constant, Keq, is a variable that describes a chemical reaction’s tendency to proceed to completion, meaning all the reactants are converted to products. The equilibrium of a reaction is the point at which the conversion of reactants into products equals the conversion of products back into reactants.
Citation:
Biologydictionary.net Editors. "Equilibrium Constant." Biology Dictionary, Biologydictionary.net, 21 Feb. 2017, https://biologydictionary.net/equilibrium-constant/.
Which property of matter is best measured using the tool shown?
A. Reactivity
B. Volume
C. Mass
D. Ductility
Answer: B volume
Explanation: that tool is used to measure volume or liquid
Answer:
B. Volume
Explanation:
test
Conservation efforts have been effective in _______. A. Increasing the number of endangered species b. Reducing all the negative impacts of human activity c. Preserving wildlife habitats d. All of the above.
Answer:
C. preserving wildlife habitats
Conservation efforts have been effective in preserving wildlife habitats.
What is conservation?They are efforts invested toward conserving or sustainable usage of natural resources.
Biodiversity conservation involves conserving plants and animal resources to prevent their abusive or wanton usage and depletion.
Through efforts at conserving biodiversity, wildlife habitats have to be preserved. By preserving habitats, biodiversity is conserved. Through habitat destruction, biodiversity is destroyed.
More on conservation can be found here: https://brainly.com/question/3299406
#SPJ2
PLEASE GELP ME I WILL MARK BRAINLIEST
4Li + O₂ ⇒ 2Li₂O
Li₂O = 2/4 x 3.33 = 1.665
50 POINTS PLEASE HELO ME
Answer:
128g
Explanation:
Simply multiply the number of moles by the molar mass of each substance (64 g/mol for SO2 and 32 g/mol for 02):
SO₂ → 2 moles × 64 g/mol =128g
O₂ → 1 mole x 32 g/mol =32g
what is considered cisgender?
Answer:
that means whatever gender you are now is the same as what was presumed for you at birth.
In the measurement 0.342, which number is the estimated digit?
Answer:
"The last digit in any number is referred to as the estimated digit."
Explanation:
So it should be 2
how many parts does the eukaryotic cell have in total
if u answer correctly u will get 20 points
Answer:
3 parts
Explanation:
Eukaryotic cells have 1) a membrane-bound nucleus; 2) numerous membrane-bound organelles and 3) several, rod-shaped chromosomes.
Would you have more kinetic energy if you are traveling fast or slow?
fast
slow
Answer:
fast
Explanation:
Because kinetic energy is equal to half the product of mass and square of velocity, increase in velocity would increase the kinetic energy as well.
true or false. the arrow labeled C represents a transfer of chemical energy to mechanical energy. explain why this is true or false.
true or false. the arrow labeled A represents a transfer of solar energy to chemical energy. explain why this is true or false.
Answer:
6. True or False. The arrow labeled C represents a transfer of chemical energy to mechanical energy. Explain why this is true or false.
a. This is __False_____ because: Factory uses Mechanical energy with is converted to chemical energy.
7. True or False. The arrow labeled A represents a transfer of solar energy to chemical energy. Explain why this is true or false.
a. This is __True_____ because: Solar energy from the sun is first, then a chemical reaction makes food for the plant.
Explanation:
Change up the spelling, put it in your own words, I didn't use advanced grammar, don't copy and paste, don't get a 0.
Alana drew diagrams to show how particles in a spoon move before and after the spoon is placed in hot liquid. At left a grid labeled Before of regularly arranged orange balls with large movement lines near each. At right a grid labeled After of regularly arranged orange balls with small movement lines near each. Which best explains how to correct Alana’s error? Make the particles in both diagrams larger. Show more movement in the ""Before"" diagram. Add more particles to the ""After"" diagram. Switch the labels on the diagrams.
The heating of the substance resulted in the transfer of energy and thereby increase the randomness. Thus, Alana's error can be rectified by switching the labels on the diagram.
What is the arrangement of atoms?The atoms are the smallest particles, and everything is made of atoms. The atoms in the object are arranged in a specific lattice to give shape to the object.
The heating resulted in the transfer of energy to the atoms, and the atoms started to move thereby will not be linearly arranged after heating.
Thus, the heating and the atomic arrangement effect can be explained by switching the labels on Alana's diagram. thus, option D is correct.
Learn more about heating, here:
https://brainly.com/question/1429452
Answer:
D
Explanation:
Switch the labels on the diagrams
Which of the compounds below will ionize in
water? Check all that apply.
H2SO,
NH3
NaCl
SO2
MgBr2
The compounds which will ionize in water include the following:
H2SO4NH3SO2What is Ionization?This is defined as the separation of a chemical's molecules into positive and negative ions.
The compounds which undergo ionization in water are seen above and is the most appropriate choice.
Read more about Ionization here https://brainly.com/question/20658080
Which best represents a homogeneous mixture of an element and a compound.
Answer:
The composition of air this is because it vmade up of oxygen, nitrogen, Nobel gages and Carbon dioxide
How many grams of KNO3 should be used to prepare 2.00 L of a 0.500 M solution?
Answer:
101 g KNO₃
Explanation:
Molarity is measued in moles per liter, mol L− 1, or molar, M, which means that a 0.500-M solution will contain 0.500 moles of potassium nitrate for every 1 L of solution.
Well, if you get 0.500 moles for every liter of solution, and your solution has a total volume of 2.0 L, it follows that it must contain 2 × 0.500 moles = 1.00 moles KNO₃
So, what mass of potassium nitrate is equivalent to one mole of the compound?
Potassium nitrate's molar mass, 101.103 g mol− 1, tells you the mass of one mole of potassium nitrate. In this case, the answer must be rounded to three sig figs, so m KNO₃ = 101 g KNO₃
Hope this helped!
101 grams of KNO₃ should be used to prepare 2.00 L of a 0.500 M solution.
What is Mole?
The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Volume of KNO₃ = 2 L
Concentration = 0.5 M
Moles of KNO₃ = Concentration × volume
= 0.5 × 2
= 1 mole
Mass of KNO₃ = Moles × molar mass
= 1 × 101
= 101g
Therefore, 101 grams of KNO₃ should be used to prepare 2.00 L of a 0.500 M solution.
Learn more about Moles, here:
https://brainly.com/question/20486415
#SPJ3
nitrogen is an atom or molecules
Answer:
Nitrogen will called as atom or molecule or ion too in the state which it exist means in which form it is present .
in an atom the number of protons must be equal of
Answer:
electrons
Explanation:
Answer:
Electrons
Explanation:
^^
A refrigeration lubricant with a high _____ point may have excessive wax separation, which can clog the system.
Answer:
ozone
Explanation:
A refrigeration lubricant with a high floc point may have excessive wax separation, which can clog the system.
What is floc point?The Floc point of the oil can be described as the temperature at which wax will start to precipitate from a mixture. When a mixture of 90% by volume of R-12 and 10% oil by Volume under the specified conditions.
Since the oil-soluble refrigerants lower the viscosity of the oil and affect both the pour point and cloud point. The floc point of the oil is a more important property where oil miscible refrigerants are used.
The results are used to compare the waxing tendency of the various different oils. It provides a method for determining the waxing tendency of the refrigeration lubricant. Floc point should not be confused with cloud point because cloud point is the temperature at which the wax is precipitated from the undiluted oil.
Learn more about refrigeration lubricant, here:
https://brainly.com/question/28205559
#SPJ2
Which subatomic particle is correctly paired with its properties?
A) Proton: positively charged, mass about equal to that of an electron
B) Neutron: no electric charge, mass about equal to that of a proton
C) Electron: negatively charged, mass about equal to a neutron
D) Positron: negatively charged, mass about equal to that of a proton.
Answer:
A. proton is positive charged ans and is equal to electrons
Proton positively charged, mass about equal to that of an electron subatomic particle is correctly paired with its properties.
The correct option is A.
What are subatomic particle made of?They include the heavier constituents of the small but extremely dense atom's nucleus, the positively charged protons and the electrically neutral neutrons, as well as the electrons, the negatively charged, nearly massless particles that still make up the majority of the atom's size.
Where is subatomic particle ?Two subatomic particles are bound together by the strong nuclear force to form the atomic nucleus. The proton is one of these subatomic elements. The neutron is the other. Similar in size and mass to protons, neutrons are electrically neutral or devoid of any net electrical charge.
To know more about Subatomic particle visit:
https://brainly.com/question/13303285
#SPJ2
Which use of pomace has become more available through new technologies?
- food flavorings
- animal feed
- landscaping mulch
- soil additives
Answer:
1. From which source is pomace derived? unused waste from food processing
2. Which use of pomace has become more available through new technologies? food flavorings
3. Criteria and constraints help guide decision-making as people work to extract useful materials from pomace. Which option is an example of how a criterion for success is applied in this situation? The criterion of minimizing chemical waste favors the use of high-temperature, high-pressure water.
4. Criteria and constraints help in deciding which methods to use when extracting useful chemicals from pomace. Which option is an example of an important constraint on a process? Organic solvents are expensive, which limits their use for extracting chemicals.
5. Which constraint is driving the interest in extracting useful chemicals from pomace? Pomace is available in greater quantities than needed for traditional uses and would be wasted.
Explanation: Just took the quick check 5/5 correct
New technologies have increased the availability of food flavorings as a use of pomace.
What is Pomace?Olive pomace oil is vir-gin olive oil made from the pulp of olives after they have been pressed for the first time. Following mechanical oil extraction, approximately Most other edible oils, such as canola, peanut, and sunflower oil, must be extracted using solvents, which is an industrial method used in the manufacturing of most other edible oils.
New technologies have increased the availability of food flavorings as a use of pomace.
Find out more information about pomace here:
https://brainly.com/question/3693705?referrer=searchResults
