Answer:
Option C
Explanation:
Organisms break down starch into glucose
Which is a carbohydrate subunitThe organisms are found in our digestive system helps in break down of starch and turns them into glucoseAnswer:
Organisms break down starch into carbohydrate subunits.
Explanation:
Starch is a necessary amount of our bodyIt is used as an carbohydrate subunit well known as glucoseIt is converted through organismsSo option C is correct
In an electroplating apparatus, where does the reduction reaction occur?
On the surface of the anode
On the surface of the battery
In the solution
On the surface of the cathode
Answer:
on the surface of the cathode
Which type of scientist would most likely study how electricity could be
produced more efficiently?
Electrical engineers are the scientists that study the production of electricity more efficient.
Which type of scientist would study how electricity could be produced more efficiently?
Electrical engineers are the type of scientist that would most likely study how electricity could be produced more efficiently because they produced new technologies which are cost efficient as well as produce high amount of electricity.
So we can conclude that electrical engineers are the scientists that study the production of electricity more efficient.
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Problems that I am stuck on! Need the answers asap
Answer:
1.b
2.b
3.a
4.a
Explanation:
use the rate laws when answering this.
Why do elements of same gropu show similar chemical properties?
How do hollow bones improve the survival of birds? (1 point )
Answer:
Hollow bones allow the birds to fly. They're quite dense, and that density allows for flight! Because we humans do not have hollow bones, our bodies are much too heavy to fly on our own. If we did, we'd probably be able to fly.
Explanation:
I
10. how many grams of koh are there in 200 grams of 10% by mass koh solution?
Answer: 20 grams
Explanation:
[tex]10=\frac{\text{grams of KOH}}{200}\\\text{grams of KOH}=20[/tex]
How long does it take for dental stitches to dissolve.
solve for x
[tex] \bold{x^{2} + 6x + 5 = 0}[/tex]
ty! ~
Answer:
x²+6x+5=0
On comparing with the equation
ax² + bx + c = 0
a=1, b = 6 and c = 5
Now
b²– 4ac = 6² – 4 x 1 x 5 = 36 - 20 = 16
[tex]x = \frac{ - b \:± \: \sqrt{b {}^{2} - 4ac } }{2a} \\ \\ x = \frac{ - 6\:± \: \sqrt{16 } }{2 \times 1} \\ \\ x = \frac{ - 6± {4} }{2} \\ \\ x = \frac{ - 6 + {4} }{2} \: \: or \: \: x = \frac{ - 6 - {4} }{2} \\ \\ \implies \: x = \frac{ \cancel-2 }{ \cancel2}^{-1 }\: \: or \: \: x = \frac{ \cancel-10 }{ \cancel2}^{-5}\\ \\ \implies \: { \blue{\fbox{ \: x = - 1 \: \: \: or \: \: \:x = - 5}}}[/tex]
[tex] {x}^{2} + 6x + 5 = 0 \\ \\ {x}^{2} + 5x + x + 5 = 0 \\ \\ x(x + 5) + 1(x + 5) = 0 \\ \\ (x + 1)(x + 5) = 0.[/tex]
[tex]x = - 1 \\ x = - 5.[/tex]
Ahmed doesn't believe in electromagnetism so he makes an electromagnet to prove his teacher wrong. To his surprise, the electromagnet works and he's able to pick up metal objects with it. Even still, he's not satisfied with his electromagnet because it's very weak. What can he do to make it stronger?
Answers: use a weaker battery
1. use a stronger battery
2. use a plastic nail
3. glue the wire to the nail
4. wrap the wire around the nail fewer times
Answer:
1) Use a stronger battery
Explanation:
I'm going to quote Northeastern University (I could try to type out an explanation but this will probably be more concise)
"Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet."
4) So, if the coils are creating a moving charge, and there are more coils, each coil will be "setting up" its own magnetic field. This means that less coils will make the electromagnet weaker
2) Because it is an electromagnet, a plastic nail is not going to produce the same effect. An electromagnet is picking up metal, and it is not picking up plastic. This is because plastic (a material with low permeability) does not have a magnetic field that is able to interact with a magnet.
[Permeability is a measure of how easily magnetic lines of force can pass through a material.]
3) There's not really a point that I can imagine of gluing the wire to the nail. Glue would put more distance between the nail and the magnet than nothing being there at all.
1) More voltage in a battery produces a larger current in the wire. This means that the strength of an electromagnet is affected by the voltage/strength of the battery. So, a stronger battery would make the electromagnet stronger, and a weaker battery would make the electromagnet weaker.
The electromagnet works, and he's able to pick up metal objects with it, he does to make it stronger to use a stronger battery. Therefore, option 1 is correct.
What is electromagnet ?An electromagnet is a type of magnet where an electric current creates the magnetic field. The wire that makes up an electromagnet is typically twisted into a coil. A magnetic field is produced by a current flowing through the wire and is concentrated in the hole in the center of the coil.
Electrical devices including motors, generators, speakers, computers, and MRI machines cannot be built without electromagnets. They are well known for their ability to lift and move heavy magnetic objects, such as scrap iron.
Many electromagnets have an advantage over permanent magnets because they can be easily turned on and off, and increasing or decreasing the amount of electricity flowing around the core can control their strength.
Thus, option 1 is correct.
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Which of the following is true for the equilibrium constant of a reaction? (5 pc
OIts value remains constant at different temperatures.
It is a ratio of coefficients of reactants to products.
It is represented by the symbol K.
Its value is always less than 1.
The equilibrium constant of the reaction is represented by the symbol K. Thus, option C is the correct and accurate statement about the equilibrium constant.
What is the equilibrium constant?The equilibrium constant is a representation of the concentration of the products and the reactants of the reaction that is raised to the powers through their stoichiometry coefficient.
Its value varies and changes at different temperatures and is not always less than 1. The equilibrium constant is the ratio of the coefficient of the products to reactants.
Therefore, option C. equilibrium constant is represented by K is true.
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9. Which practice has been able to save some organisms from extinction?
O cross breeding
O genetic modification
O captive breeding
Orebuilding habitats
The practice that has been able to save some organisms from extinction is cross breeding.
What is cross breeding?Cross breeding is the process of producing separate strains of the same species in order to create new traits.
Living organisms are bound to go extinct when faced by certain unfavorable conditions that cannot be adapted to.
However, the production of resistant strains of the same species of an organism via cross breeding can help prevent them from going extinct.
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Answer:
c
Explanation:
In a neutralization reaction, an aqueous solution of an arrhenius acid reacts with an aqueous solution of an arrhenius base to produce:.
An aqueous solution of an arrhenius acid reacts with an aqueous solution of an arrhenius base to produce water and salt.
What is a Salt?This is a compound which is formed as a result of a neutralization reaction between acid and base.
Arrhenius acid reacts with an aqueous solution of an arrhenius base to produce water and salt due to increased concentration of H+ and OH- respectively.
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An atom's electron configuration ends with 3p^3. if another atom has nine more electrons, what would be the continuation of the electron configuration?
The continuation of the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]
What is an electron configuration?Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.
The initial p-orbital (the [tex]3p^3[/tex]) is incompletely filled. Thus, the first thing would be to fill it completely ([tex]3p^6[/tex]) so as to obey the orbital-filling rule. This leaves 6 more electrons.
After 3p orbital, the next orbitals are 4s, 3d, 4p, 5s, etc.
The 4s orbital will take a maximum of 2 electrons, leaving 4 more electrons.
Next would be the 3d orbital which can take a maximum of 8 electrons, but only 4 electrons are left.
Thus, the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]and elements is Vanadium (V).
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Which description is true of 0.02 m ca(oh)2 if ca(oh)2 completely dissociates in water?
If [tex]Ca(OH)_2[/tex] completely dissociates in water, it means it is a dilute strong base.
What is a base?A base is a substance that can neutralize the acid by reacting with hydrogen ions.
An acid is a substance that donates hydrogen ions and a base is a substance that accepts hydrogen ions.
Ca(OH)₂ does not have hydrogen ions to donate, but it can accept hydrogen ions to form H₂O according to this equation:
H⁺ + OH⁻ → H₂O.
Hence, Ca(OH)₂ is a base.
A strong base is a base that dissociates completely into metallic and hydroxide ions in aqueous solutions, while a weak base dissociates partially.
Hence, Ca(OH)₂ is a strong base.
Dilute refers to a solution meaning that the substance is not pure and the concentration is low. Since the solution the Ca(OH)₂ is 0.02 M means that it is diluted.
Therefore, we have found that the description of 0.02 M Ca(OH)₂ is a dilute strong base.
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Why is it important for scientists to use common units such as the metric system?
A. so they can effectively communicate their findings
B. so they can double check their data
C. so they can form similar hypotheses
D. so they can conduct controlled experiments
Answer:
The correct answer is A, or "so they can effectively communicate their findings.
Explanation:
The metric system is the international system of weights and measures, which is used universally in the scientific community. Scientists benefit from the metric system so that they can communicate theories, ideas and most importantly data in a way everyone understands. It is virtually impossible to comprehend any modern, data-rich research in the natural or physical sciences without referring to the metric system and being able to contextualize the numbers and units it includes.
Please brainliest answer
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Fe(no3)3 + na0h > fe(oh)3 + nano3 is balanced or unbalanced?
Answer:
Unbalanced
Explanation:
[tex]\text{Fe}(\text{NO}_3)}_3+ \text{NaOH} \rightarrow \text{Fe(OH)}_3 + \text{NaNO}_3\\\\\text{Balanced reaction:}\\\\\text{Fe}(\text{NO}_3)}_3+ 3\text{NaOH} \rightarrow \text{Fe(OH)}_3 + 3\text{NaNO}_3[/tex]
V2 = (P1 × V1 × T2) (P2 × T1) A gas with a beginning pressure of 2 atm at a temperature of 300 K has a volume of 20 ml. What will be the new volume if the pressure increases to 4 atm and the temperature is lowered to 200 K?
6.6ml will be the new volume if the pressure increases to 4 atm and the temperature are lowered to 200 K.
What is an ideal gas equation?The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
Given data:
[tex]V_1=20 ml[/tex]
[tex]T_1=3[/tex]
[tex]P_1=2 atm[/tex]
[tex]T_2=200 K[/tex]
[tex]P_2=4 atm[/tex]
[tex]V_2=?[/tex]
Using equation:
[tex]V_2 =[/tex] [tex]\frac{P_1 X V_1 XT_2}{P_2 X T_1}[/tex]
[tex]V_2 =[/tex][tex]\frac{2 atm X 20 ml X200 K}{4 atm X 300 K}[/tex]
[tex]V_2 = 6.6 ml[/tex]
Hence, 6.6ml will be the new volume if the pressure increases to 4 atm and the temperature are lowered to 200 K.
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What is a real-life example of equilibrium and what would happen if there was a shift in the system of that example?
Answer:
Refrigerator
Explanation:
Think about it. Equilibrium is between 2 "places", and if you didn't open the fridge, there would be a buildup of cold air.
Because of that buildup, it would keep getting colder until it isn't possible to get cold anymore. That is equilibrium.
However, if you were to open the door for a very, very long time, you would lower the temp. inside the fridge, therefore causing for the room you are in to be slightly colder, and the fridge to decrease in cold. The fridge will still be slightly cold, but it won't be lukewarm if you leave it for 2 hours. (Unless it's broken)
That is equilibrium :)
Identify the examples of experiences. Select three options.
Connie has good hearing ability.
Daryl has visited many other countries.
Alfonso has developed many strong friendships
Thelma has decided to audition for a role in a television show.
Sherry has set a goal of reading fifty books in a year.
Marion has worked at jobs that improved his time-management skills.
i need help!!!
Experience refers to something that happens in a person's life that leaves an indelible mark on the person.
What is an experience?The term experience refers to something that happens in a person's life that leaves an indelible mark on the person.
The following are experiences;
Daryl has visited many other countries.Alfonso has developed many strong friendshipsMarion has worked at jobs that improved his time-management skills.Learn more about experiences:https://brainly.com/question/11256472
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Answer:
Experience refers to something that happens in a person's life that leaves an indelible mark on the person.
What is an experience?
The term experience refers to something that happens in a person's life that leaves an indelible mark on the person.
The following are experiences;
Daryl has visited many other countries.
Alfonso has developed many strong friendships
Marion has worked at jobs that improved his time-management skills.
Explanation:
Indicate how the gas molecules move between the system and the surroundings based on changes in pressure, temperature, and volume and the number of moles.
The gas molecules move between the system and the surroundings follow PV=nRT.
What are molecules?The smallest particle of a substance has all of the physical and chemical properties of that substance.
An increase in pressure pushes the molecules closer together, reducing the volume. If the pressure is decreased, the gases are free to move about in a larger volume.
In the kinetic theory of gasses, increasing the temperature of a gas increases in average kinetic energy of the molecules, causing increased motion.
The reduction in the volume of the gas means that the molecules are striking the walls more often increasing the pressure, and conversely if the volume increases the distance the molecules must travel to strike the walls increases and they hit the walls less often thus decreasing the pressure.
At constant temperature and pressure the volume of a gas is directly proportional to the number of moles of gas. At constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas.
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Below is the thermochemical equation for the combustion of octane.
SC8H18(l) + 25O2(g) ⇒ 16CO2 (g) + 18H2O(l), ΔH= -10,941kj
How much heat is released during the combustion of 4 moles of octane (C8H18)
Question 5 options:
-21,882 kJ
-175,056 kJ
-2,735 kJ
-10,941 kJ
Impossible to answer this question with the information provided
-5,470.5 kJ
5mol produces -10.941KJ
4 mol let produces x KJ
Solve through proportion
5/-10.941=4/x5x=-43.764x=-43.764/5x=8.756 KJ5moles of octane produces -10941KJ
1mol of octane produces 2188KJ
4mol of octane produces
2188(4)8756KJquestion -What happens to the energy of a wave if the amplitude of the wave is doubled?
The energy carried by the waves depends on the amplitude of the wave. If the amplitude is doubled then the energy gets increased by four times.
What is amplitude?The amplitude of a wave is the distance from the center line to the trough or the crest of the wave. The energy of the wave is directly proportional to the square of the amplitude.
E ∝ A²
So if the amplitude is doubled then E = 4. Hence, the energy gets increased quadruples times. The energy is related to the frequency and the wavelength of the wave that travels.
Therefore, the energy gets increased by four times if the amplitude is doubled.
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At a consent tempture the pressure on a 2.5 l ballon is increased from 2.4 atm to 5.8 atm. what is the new volume?
Answer:
1.034 L
Explanation:
P1 V1 = P2 V2
P1 V1 / P2 = V2
2.4 (2.5) / 5.8 = V2 = 1.034 L
If 0.094 moles of magnesium react with excess oxygen, how many moles of magnesium oxide would be formed?
The equation for this reaction is
[tex]\text{Mg}+\text{O} \longrightarrow \text{MgO}[/tex]
This means that for every mole of magnesium consumed, 1 mole of magnesium oxide is produced.
So, the answer is 0.094 moles.
For which process would the pictured cell be used?
Producing electricity
Splitting a compound into its elements
Purifying a metal
Coating a material with metal
Answer:
Coating a material with metal
(SInce the glasses will be coated with gold.)
groundwater is an important resource for all life on earth. as you have read, water levels in the ogallala aquifer are decreasing. one proposed
strategy mentioned in the article is to dig deeper wells. do you agree or disagree with this strategy? use evidence and scientific reasoning to
support your position
Digging of wells being able to increase aquifer is something I agree with.
What is an Aquifer?
This is a water permeable rock layer which is found in the underground layer of the earth.
Wells will ensure water seeps into these layers thereby bringing about an increase in the aquifer.
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TRUE OR FALSE
Q1.) Is the distances of the gas molecules are far greater than it's molecule dimensions.?
Q2.) The movement of any gas particle/molecules is directly affected by temperature.?
｡ﾟ(TヮT)ﾟ｡ H-Help me with this pls...,,
Answer:
Q1. False
Q2. True
Explanation:
gas molecules are not that at far than dimensions molecules
An atom has eight protons and nine neutrons. draw the atomic structure of the atom
An atom has eight protons and nine neutrons. The atomic structure of the atom is attached below in image.
What is an atomic structure ?The term "atomic structure" describes the structure of an atom, which has a nucleus that contains both protons and neutrons . The centre of the nucleus is circled by the negatively charged electrons.
The smallest piece of ordinary matter within an element is called an atom. Protons, neutrons, and electrons are the three subatomic particle types that make up an atom.
An isotope's number is equal to the sum of its protons plus neutrons since their masses are almost identical. Oxygen 16 therefore has 8 protons and 8 neutrons, followed by oxygen 17 with 8 protons and 9 neutrons, and oxygen 18 with 8 protons and 10 neutrons.
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How many moles of NH3 are produced in the reaction of 3.3 moles of N2?
N2 + 3H2 = 2NH3
Answer:
6.6 moles of NH3
Explanation:
3.3 mol N2 * (2 mol NH3/ 1 mol N2) = 6.6 mol NH3
Which of the following numbers is equal to the value shown in scientific
notation below?
1.9 x 10-2
A.0.0019
B.0.019
C.0.19
D. 0.00019
Explanation:
the answer for the above
is b)0.019