Which process is most directly driven by light energy?
A
creation of a pH gradient by pumping protons across the thylakoid membrane
B
carbon fixation in the stroma
C
reduction of NADP+ molecules
D
removal of electrons from chlorophyll molecules
Answers
The process that is most directly driven by light energy is the removal of electrons from chlorophyll molecules.Chlorophyll is a pigment that is green in color and present in plants, algae, and some bacteria.
option D is the correct answer
It is a vital molecule in photosynthesis, the process by which plants make their food. Chlorophyll absorbs light energy, which is then used to convert carbon dioxide and water into glucose and oxygen via photosynthesis.In the chloroplasts, the light-dependent reactions of photosynthesis occur, where the energy from light is captured by chlorophyll and converted into chemical energy in the form of ATP and NADPH. These molecules are then used in the Calvin cycle, where carbon dioxide is converted into glucose.This removal of electrons from chlorophyll molecules is essential in the process of photosynthesis, as it is what allows the energy from light to be captured and utilized by the plant. Without this process, photosynthesis cannot occur and the plant would be unable to produce its own food.for more such question on electrons
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Related Questions
determine+the+amount+of+potassium+chloride+(kcl)+present+in+a+500.0+ml+sport+drink+of+the+drinks+nutrition+label+shows+that+it+is+1.5%+kcl+by+mass.
Answers
There are approximately 7.5 grams of potassium chloride (KCl) present in the 500.0 mL sports drink.
To determine the amount of potassium chloride (KCl) present in the 500.0 mL sports drink, we need to calculate the mass of KCl based on the given percentage composition. Given:
Volume of sports drink = 500.0 mL
Percentage of KCl by mass = 1.5%
To find the mass of KCl, we can use the formula:
Mass of KCl = Percentage composition x Total mass of the solution
First, we convert the volume of the sports drink from millilitres to grams assuming the density of the solution is 1 g/mL:
Mass of the solution = Volume of the solution x Density
Mass of the solution = 500.0 mL x 1 g/mL
Mass of the solution = 500.0 g
Next, we calculate the mass of KCl using the percentage composition:
Mass of KCl = (Percentage of KCl / 100) x Mass of the solution
Mass of KCl = (1.5 / 100) x 500.0 g
Mass of KCl = 0.015 x 500.0 g
Mass of KCl = 7.5 g
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Which best describes a joule?
A) unit of temperature
B) unit of the average kinetic energy
C) unit of force
D) unit of heat
Answers
I think the answer is A
Answer:
a unit of heat
Explanation:
Coach Farris demonstrates how to serve a volleyball. She hits the volleyball with a force of 7 N and the volleyball accelerates at 10.0 m/s2. What is the mass of the volleyball? Record
your answer below. Be sure to use correct place value (2 decimal places).
Answers
Answer:
0.70 kgExplanation:
The mass of the volleyball can be found by using the formula
\(m = \frac{f}{a} \\ \)
f is the force
a is the acceleration
From the question we have
\(m = \frac{7}{10} = 0.7 \\ \)
We have the final answer as
0.70 kgHope this helps you
What volume does 0.15 mol of N2 gas occupy at a temperature of 34°C and a pressure of
423 mm Hg?
Answers
0.15 mol of \(N_2\) gas occupies approximately 5.09 liters at a temperature of 34°C and a pressure of 423 mm Hg.
To determine the volume occupied by 0.15 mol of \(N_2\) gas at a temperature of 34°C and a pressure of 423 mm Hg, we can use the ideal gas law:
\(PV = nRT\)
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in kelvins.
First, we need to convert the temperature to kelvins:
\(T = 34°C + 273.15 = 307.15 K\)
Next, we can substitute the given values into the ideal gas law and solve for V:
\(V = (nRT)/P\)
\(= (0.15 mol)(0.08206 L.atm/mol.K)(307.15 K)/(423 mm Hg * 1 atm/760 mm Hg)\)
≈ 5.09 L
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determine how much heat (in kj) of 2.89 mol of tio2(s)
Answers
Total heat generated by 2 mole of TiO2(s) is 4.963kJ.
The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.
The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,
q = 2.89 * 25 * 683.697
=> 4963.35
In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.
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Complete question :
determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k
The volume of container 2 i 27. 32 L. How many mole of the ga are in container 2?
Answers
The number of moles in container 2 is 33.3moles when the container has 27.32L of gas inside it
The number of moles of gas in container 2 can be calculated using the Ideal Gas Law:
n = PV/RT
where n is the number of moles of the gas with known volume,
P is the pressure (assumed to be 1 atm for ideal gases),
V is the volume (27.32 liters),
R is the ideal gas constant (0.0821 L·atm/mol·K) and
T is the temperature (assumed to be 273.15 K).
Plugging in the values, we get:
n = (1 atm)(27.32 L)/(0.0821 L·atm/mol·K)(273.15 K)
n = 33.3 mol
Therefore, there are 33.3 moles of gas in container 2.
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Name the process by which oxygen moves from alveoli to blood
Answers
diffusion...........the blood through the capillaries lining the alveolar walls. Once in the bloodstream, oxygen gets picked up by the hemoglobin in red blood cells.
What molecular shape is this lewis structure?
A. Trigonal pyramidal
B. Trigonal planar
C. Bent
D. Tetrahedral
E. Linear
Answers
Answer:C
Explanation: I learnet it too but more time ago hope its good
What is the molecular geometry of a molecule made of two atoms that share one pair of electrons and have no lone electrons pairs?
trigonal pyramidal
linear
trigonal planar
bent
Answers
Answer:
linear
Explanation:
Actually I consulted various sources too and that was the most sought answer,I just decided to answer you before studying it too
Please help! Its world science!
1. If you turn on the burner on a gas stove under a pan of cold water, energy moves from the burner to the pan of water. What is this type of energy transfer called?
2. If you burn wood in a fireplace, which type of energy resource are you using?
3. Which form of energy is an important factor in making electricity from water power?
4. What is a hydrocarbon?
5. What byproduct of nuclear energy has caused concerns about the use of this resource and why?
6. Which chemical element exposed in surface coal mining can cause environmental problems in nearby bodies of water?
7. What is the original source of most energy used on Earth?
8. When we burn a fuel, what is released that allows work to be done?
9. For biomass, solar, coal, natural gas, oil, and geothermal energy, identify each energy resource as renewable or non-renewable.
10. What factors are important in judging how helpful an energy resource is to us?
Answers
Energy as the ability to do work.
What is energy?
Energy has been defined as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work. People use energy to walk and for bicycle, to move cars along roads and boats through water, to cook food on stoves, to light our homes and offices, to manufacture products.
There are different forms of energy, which may include:
HeatLightMotionElectricalChemicalGravitationalMagneticThese forms of energy can be grouped into two general types;
Potential (stored energy)Kinetic (working energy)Explanations
1. This is called convection.
2. You are using chemical energy and converting it to thermal (heat) energy.
3. Kinetic energy is the important factor
4. A hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or exemplified by the odors of gasoline. Examples of hydrocarbons are coal, petroleum, natural gas and tar. They are used as energy sources.
5. Radioactive waste. These materials can remain radioactive and dangerous to human health for thousands of years.
6. Mercury.
7. The energy of the sun is the original source of most energy used on Earth.
8. Heat is released and this heat expended allows work to be done.
9.
biomass - renewablesolar - renewablecoal - non-renewablenatural gas - non-renewableoil - non-renewablegeo-thermal energy - renewable10.
It produces a lot of heat per unit mass.It does a huge amount of work per unit mass.It is easily accessible.It is easy to store and transport.It is economical.It produces less amount of smoke.Learn more about energy:https://brainly.com/question/13881533
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ASAP Which substance is considered a building block for all living things?
hydrogen
glucose
carbon
protein
Answers
The Answer is:
C.carbon
What is a sustainable consumption problem
Answers
Explanation:
Sustainable consumption refers to the proper use of good and services to meet basic needs and to avail better quality of life. Also, it minimizes the uses of natural resources, toxic materials, and emissions of waste and pollutants over the life cycle.
Algae blooms are most often caused by?
Answers
Algae blooms are most often caused by eutrophication.
What are algae blooms?Algae blooms are are dense layers of tiny green plants that occur on the surface of lakes and other bodies of water when there is an overabundance of nutrients (primarily phosphorus) on which algae depend.
Algae species tend to proliferate in growth (bloom) in the presence of abundance nutrients. This abundance of nutrients is as a result of a process called eutrophication.
Eutrophication is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.
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Explain the three forces at work that hold an atom together.
Answers
Answer:
Electromagnetic force, Strong nuclear force, and Weak nuclear force.
Explanation:
Forces acting
electromagnetic force, strong nuclear force, and weak nuclear force. The electromagnetic force keeps the electrons attached to the atom. The strong nuclear force keeps the protons and neutrons together in the nucleus. The weak nuclear force controls how the atom decays.
George used the apparatus below to find out what substances are produced when methanol burns.
As the methanol burned two different gases were produced.
A) One of these gases condensed in the u-Tube to give a colourless liquid. Give the name of this liquid.
B) The other gas turns the limewater cloudy. Give the name of this gas
Answers
The term combustion has to do with a situation in which a substance is burnt in oxygen. When we burn a substance in oxygen, we say that the substance is oxidized.
Methanol is a member of the alkanol series of organic compounds. The equation for the combustion of methanol is shown to be as follows;
\(CH_{3} OH + 3O_{2} ---- > 2O_{2}+ 4H_{2}O\).
Looking at the set up as we can see it in the question, we can observe the following;
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2. What properties do all acids have?
3. Why should you never use taste as a method for testing an unknown substance?
4. What is used to detect the presence of acids?
10. What can you use to detect the presence of a base?
11. What are some common bases that we use every day?
12. How does an antacid help reduce heartburn?
13. What happens when acid and base are mixed
14. What is used to determine the pH of a substance?
15. Describe how the pH scale works. In other words, what is it actually measuring?
17. Why is pH important to our environment?
18. Describe how salt is formed.
Pls help!!!!!
Answers
3. You should NEVER taste unknown chemicals because many are poisonous and can destroy body tissue.
4. Most often dyes are used to detect acids. The dyes will turn a certain color which indicates the presence of an acid.
10. You can use litmus to detect wether a solution is a base or an acid.
11. The most common bases I can think of would be: baking soda, laundry detergent, or soaps.
12. Antacids work by neutralizing the acids in your stomach.
13. When an acid and base are mixed together, they produce a salt.
14. Normally pH meters are used, but you can also calculate the pH using math. (yuck)
15. The pH scale measures how acidic or basic a substance is. It ranges from 0-14, with 7 being neutral.
17. pH is very important to the environment as it helps us measure and monitor for safe water conditions. A rise or fall from the average water pH level can indicate chemical pollution.
18. Salt is formed when an acid and base react with each other. It then has a cation of the base, and anion of the acid.
I hope those helps!! (:
(06.06 MC)
A gas has a mass of 3.82 g and occupies a volume of 0.854 L. The temperature in the laboratory is 302 K and the air pressure is 104 atm Calculate the molar
mass of the gas.
Answers
Answer:
Explanation:
3.12
Answer:
its 3.12
Explanation:
ON A TIMER!!! PLZ HELP ME!!!
Consider the reaction below. *Image* Which is the net ionic equation for the reaction?
Answers
Answer:
C2H3O2^-(aq) + H^+ —> HC2H3O2
Explanation:
The following equation was given in the question:
Na^+ + C2H3O2^-(aq) + H^+ Cl^- —> Na^+ + Cl^- + HC2H3O2
Now, to obtain the net ionic equation, we simply cancel out the ions common to both side of the equation.
A careful observation of the equation above, shows that sodium ion, Na^+ and chloride ion, Cl^- are common to both side of the equation.
Therefore, to obtain the net ionic equation, we simply cancel out Na^+ and Cl^- from both side of the equation. This is illustrated below:
Na^+ + C2H3O2^-(aq) + H^+ Cl^- —> Na^+ + Cl^- + HC2H3O2
C2H3O2^-(aq) + H^+ —> HC2H3O2
Therefore, the net ionic equation is
C2H3O2^-(aq) + H^+ —> HC2H3O2
The material used as a biological sensor is one dimension of 20 mm, the other Are in nanometers
Answers
Answer: 20 , 40
I want know the answer now !
Lead (II) Acetate + Potassium Chromate
Answers
Answer:
SOMEONE HURRY AND ANSWER THIS
Explanation:
What is the main point of the reading? Group of answer choices Many elements combine to make a few compounds. Hawaii is made up of only a few types of compounds A few elements combine to make many compounds. Elements cannot be combined except by artificial means.
Answers
Answer:
A few elements combine to make many compounds.
Explanation:
The heading of the reading is 'Few elements, many Compounds'. The reading has focused on the process involved in the formation of elements and compounds. In the Hawaiian Islands the elements are found in abundance. These elements combine together to form compounds. The mountains, greenery, rocks and living matter are made up of many elements and compounds. The elements present helps in forming various compounds.
A radioactive isotope has a half-life of 9 hours. find the amount of the isotope left from a 360-milligram sample after 36 hours. if necessary, round your answer to the nearest thousandth.
Answers
Answer:
22.5 mg
Explanation:
36 hrs / 9 hr/half life = 4 half lives
(1/2)^4 * 360 = 22.5 mg
Two objects of the same mass and are the same temperature. The same amount of heat is added to each of them. Object A creates a higher temperature than object B and no phaseb changes occurred which samples is made of the substance with a higher specific heat capacity?
Answers
Answer: I don’t know ask my teacher
Explanation:
The sample made of the substance with a higher specific heat capacity would be object B.
What is specific heat capacity?If two objects of the same mass and same initial temperature are given the same amount of heat, but one of them (Object A) experiences a greater temperature increase than the other (Object B), then Object A must have a lower specific heat capacity than Object B.
The specific heat capacity is a measure of how much heat energy is required to raise the temperature of a substance by 1 degree Celsius. A substance with a higher specific heat capacity requires more heat energy to raise its temperature by the same amount compared to a substance with a lower specific heat capacity.
In this case, since both objects received the same amount of heat energy but Object A experienced a greater temperature increase than Object B, we can conclude that Object A must have a lower specific heat capacity than Object B.
Therefore, the sample that is made of the substance with the higher specific heat capacity must be Object B.
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A 0. 150-mole quantity of CoCl2 is added to a liter of 1. 20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant* of Co(NH3)62 is 5. 0 × 1031 M–6
Answers
The concentration of Co²⁺ ions at equilibrium is 0.150 M.
To determine the concentration of Co²⁺ ions at equilibrium, we need to consider the reaction between CoCl₂ and NH₃ to form Co(NH₃)₆²⁺.
The balanced equation for the reaction is:
CoCl₂ + 6NH₃ ⇌ Co(NH₃)₆²⁺ + 2Cl⁻
We can set up an ICE (Initial, Change, Equilibrium) table to solve for the concentration of Co²⁺ ions at equilibrium.
Initially, we have 0.150 moles of CoCl₂ and 1 liter of 1.20 M NH₃ solution.
Using the stoichiometry of the reaction, we can see that for every mole of CoCl₂, we form 1 mole of Co(NH₃)₆²⁺ ions. Therefore, the concentration of Co(NH₃)₆²⁺ ions at equilibrium is equal to the initial concentration of CoCl₂.
Therefore, the concentration of Co²⁺ ions at equilibrium is 0.150 M.
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If an object does Not explode, catch fire, or dissolve, how would you describe this object? (Three answers)
Answers
Non-combustible
eg:-glass,water,stone, Portland cement etc ...
Answer:
Noncombustible
Explanation:
Not explode means no blastsCan't catch fire hence no combustionnot dissolve means not reacts with H and OSo
Some examples are ,glass ,stone
How much heat is needed to condense 22. 25 grams of nitrogen gas at –195. 8°C? The latent heat of vaporization of nitrogen is 199. 0 J/g. Joules.
Answers
The heat required to condense 22.25 grams of nitrogen gas at –195.8°C is 4,424.75 J.
Given:Mass of Nitrogen gas = 22.25 g
Temperature of Nitrogen gas = -195.8°C
Latent Heat of Vaporization of Nitrogen = 199.0 J/g
We know that, the heat required to change the phase of matter is given by;Q = mL
Where,Q = Heat Required to change the phase of matterm = Mass of the matter
L = Latent Heat of Vaporization of the matter (for Condensation, L will be Latent Heat of Condensation)
Substituting the given values,we get Q = 22.25 × 199.0Q = 4,424.75 J
Thus, the heat required to condense 22.25 grams of nitrogen gas at –195.8°C is 4,424.75 J.
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Is copper penny react
reaction with Nitric
acid a
Chemical or physical
Change?
Answers
Answer:
The reaction that occurs is a redox reaction. The Copper metal (Cu 0)on the copper pennies is oxidized in concentrated nitric acid to produce Cu2+ ions. Copper is easily oxidized to Cu2+, which is blue in aqueous solutions (water) so you should see the solution turn blue as the copper penny reacts.
Have a nice day ;)(^-^)
Taking into account the definition of chemical and physical change, the reaction of the copper penny with nitric acid is a chemical change.
Physical changePhysical changes are those in which the substances involved are the same before and after the change. That is, a physical change is a transformation in which the nature of matter does not change.
Chemical changeChemical changes are considered to be those in which the substances involved are transformed into totally different ones.
In this way, the initial substances do not exist after the phenomenon has occurred and instead, new substances are formed, different from the initial ones.
That is, a chemical change is a transformation in which the nature of matter varies.
This caseWhen a penny of copper reacts with nitric acid, a redox reaction occurs where the copper metal in the copper pennies is oxidized to produce Cu²⁺ ions, whereas because the nitric acid oxidizes the copper, the nitric acid itself is reduced to nitric oxide (NO). Nitric oxide then reacts with oxygen in the air to produce nitrogen dioxide (NO₂). This can be represented by:
Cu + 4 HNO₃ → Cu²⁺(ac) + 2 NO₃⁻ + 2 NO₂ + 2 H₂O
Finally, the reaction of the copper penny with nitric acid is a chemical change because a redox reaction occurs.
Learn more:
https://brainly.com/question/2684420?referrer=searchResultshttps://brainly.com/question/13339068?referrer=searchResultsaccording to the arrhenius concept, if naoh were dissolved in water, it would act as
Answers
Answer:
base
Explanation:
The substance NaOH will be disassociated in ions of Na and OH.
Ahrrenius concept of base it's anything that dissolved in water produces OH.
1.) Give the formula for the alkane containing 500 carbons.
2.) Give the formula for the aliens containing 15 carbons.
Answers
\(\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}\)
Actually Welcome to the concept of General organic chemistry.
1.) The formula for alkanes is Cn H2n+2
===> here n = 500, hence we get as,
C500, 2n+2 = 2(500)+2 ==> 1000+2 ==> 1002
hence the formula is ==> C500 H1002
2.) The formula for alkenes is,
CnH2n
hence, here n = 15
so we get as,
===> C15 H30
1.37 gram of cupric oxide on reduction with hydrogen gas gives 1.098gram of copper and in next experiment 1.17 gram of copper produce 1.476gram of copper oxide illustrate this satisfy law of definite proportion
Answers
Answer: This satisfies the law of definite proportion or constant proportion and it can be proven below.
Explanation:
The law of constant or definite proportion states that all pure samples of the same compound no matter how they are made; are made up of the same elements combined in the same proportion by mass. The can be verified by finding the ratio of copper to oxygen in the both experiment listed above.
In the first experiment:
1.37 g of cupric oxide contains 1.098 g copper therefore oxygen = 1.37 − 1.098
=0.272 g
The ratio of copper to oxygen is=
1.098 ÷ 0.272
= 4:1
In the SECOND or next experiment:
1.476 g of cupric oxide contains 1.17 g copper Therefore oxygen = 1.476−1.17
=0.306g
The ratio of copper to oxygen is =
=1.176 ÷ 0.306
=3.8:1
Which is approximately≃4:1.
In conclusion, despite the different methods of the experiments, composition of copper of copper in the two different samples are the same and the cupric oxide obtained from different sources contain the same elements ( copper and oxygen) combined in the SAME ratio.