Answer:
Energy enters the biosphere as sunlight. Plants change this energy into chemical energy through the process of photosynthesis. Then, the energy is passed to organisms that eat the plants. Energy and matter are also passed between organisms when they eat one another.
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3. What is the energy of a photon whose frequency is 5.2 x 1015 Hz? Use the equation: E = hxv
h= 6.626 10-34 J xs
4. What is the frequency of radiation whose wavelength is 2.40 x 105 cm? v=c+X
C= 3 x 108m/s
Answer:
3. 3.45×10¯¹⁸ J.
4. 1.25×10¹⁵ Hz.
Explanation:
3. Determination of the energy of the photon.
Frequency (v) = 5.2×10¹⁵ Hz
Planck's constant (h) = 6.626×10¯³⁴ Js
Energy (E) =?
The energy of the photon can be obtained by using the following formula:
E = hv
E = 6.626×10¯³⁴ × 5.2×10¹⁵
E = 3.45×10¯¹⁸ J
Thus, the energy of the photon is 3.45×10¯¹⁸ J
4. Determination of the frequency of the radiation.
Wavelength (λ) = 2.4×10¯⁵ cm
Velocity (c) = 3×10⁸ m/s
Frequency (v) =?
Next, we shall convert 2.4×10¯⁵ cm to metre (m). This can be obtained as follow:
100 cm = 1 m
Therefore,
2.4×10¯⁵ cm = 2.4×10¯⁵ cm × 1 m /100 cm
2.4×10¯⁵ cm = 2.4×10¯⁷ m
Thus, 2.4×10¯⁵ cm is equivalent to 2.4×10¯⁷ m
Finally, we shall determine the frequency of the radiation by using the following formula as illustrated below:
Wavelength (λ) = 2.4×10¯⁷ m
Velocity (c) = 3×10⁸ m/s
Frequency (v) =?
v = c / λ
v = 3×10⁸ / 2.4×10¯⁷
v = 1.25×10¹⁵ Hz
Thus, the frequency of the radiation is 1.25×10¹⁵ Hz.
How do SMRs provide more flexibility than ordinary nuclear reactors?
Select all that apply.
More reactors can be installed at a location as the energy demand increases.
Power plants can be built to fit locations with less demand or less space.
The SMRs can use multiple types of fuel and recycle byproducts if needed.
The SMRs can adjust their energy output using coolants and control rods.
Answer:
The SMRs can adjust their energy output using coolants and control rods.
Power plants can be built to fit locations with less demand or less space.
Explanation:
I think that it is but I am not sure.
Power plants can be built to fit locations with less demand or less space. The SMRs can adjust their energy output using coolants and control rods. The correct options are B and D.
What are SMRs?A wireless communications technology that competes with traditional cellular services. The base station equipment supplier is the transmitter licensee in an SMR system.
Power plants can be built to accommodate locations with low demand or limited space. Coolants and control rods allow SMRs to adjust their energy output.
These advanced reactors, which are expected to range in size from tens to hundreds of megawatts, can be used for power generation, process heat, desalination, or other industrial applications.
Light water or other non-light water coolants, such as a gas, liquid metal, or molten salt, may be used as a coolant in SMR designs.
Thus, B and D are correct options.
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Classify each of the following elements as
a metal, a nonmetal, or a metalloid:
boron, carbon, aluminum, and silicon.
The non-metals are boron and carbon. The metal is aluminum and the metalloid is silicon.
Explanation:
non-metal = boron, carbon
metal = aluminum
metalloid = silicon
Non-metal = boron, carbon
Metal = aluminum
Metalloid = silicon
What is metal?A solid material which is lustrous, hard, shiny, malleable, and sonorous with good electrical and thermal conductivity.
Metal is an element which is typically hard, shiny, fusible, malleable, and ductile, with good electrical and thermal conductivity.
A nonmetal is an element that does not have the properties of a metal.
A metalloid is an element having intermediate properties of both metals and nonmetals.
Hence,
Non-metal = boron, carbon
Metal = aluminum
Metalloid = silicon
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Is honors high school chemistry hard? Is it hard mathematically? please answer ASAP i have to put in my courses for next year.
Explanation:
yes its hard if you don't pay attention.
Yes, the math is harder but chemistry is not it's really fun the math does get harder tho.
A local plant nursery uses large sprinklers to water the plants twice a day. The water contains phosphorus, which is a fertilizer that helps plants grow. Some of the water becomes runoff and ends up in nearby streams and lakes. This is an example of which type of short-term human-induced environmental change? eutrophication
Answer:
It’s eutrophication
Explanation:
There is no way it can be DEFORESTATION or NON SUSTAINABLE SPECIES
Non sustainable harvesting has something to do with animals and eutrophication means adding excessive nutrients
Answer:A.
Explanation: I took the test, sorry if this is incorrect
Complete the passage:
During the process of polymerization____
combine by sharing electrons. This process forms a
,____which is made of repeating subunits. The resulting material is used in a variety of ways.
Answer:
During the process of polymerization, monomers
combine by sharing electrons. This process forms a polymer, which is made of repeating subunits. The resulting material is used in a variety of ways.
Answer:
monomers and polymer.
Explanation:
Aluminum nitrate reacts with sodium hydroxide to form a precipitate of aluminum hydroxide. What mass of aluminum hydroxide will precipitate when 35.5 mL of 0.145 mol/L aqueous aluminum nitrate is mixed with 44.2 mL of 0.215 mol/L aqueous sodium hydroxide?
Answer:
The mass of aluminum hydroxide that will precipitate when 35.5 mL of 0.145 mol/L aqueous aluminum nitrate is mixed with 44.2 mL of 0.215 mol/L aqueous sodium hydroxide is approximately 0.247 grams
Explanation:
The given parameters are;
The volume of 0.145 mol/L aqueous aluminum nitrate in the reaction = 35.5 mL
The volume of 0.215 mol/L aqueous sodium hydroxide in the reaction = 44.2 mL
The balanced chemical equation for the reaction is given as follows;
Al(NO₃)₃ (aq) + 3NaOH (aq) → Al(OH)₃ (s) + 3NaNO₃ (aq)
Therefore;
1 mole of Al(NO₃)₃, reacts with 3 moles of NaOH to form 1 mole Al(OH)₃, and 3 moles of NaNO₃
The number of moles of aqueous aluminum nitrate in the reaction = 35.5/1000 L × 0.145 mol/L = 0.0051475 moles
The number of moles of aqueous sodium hydroxide in the reaction = 44.2/1000 L × 0.215 mol/L = 0.009503 moles
Therefore, 0.009503 moles NaOH will react with 0.009503/3 moles Al(NO₃)₃ to form 0.009503/3 moles of aluminum hydroxide precipitate
The molar mass of aluminum hydroxide = 78 g/mol
Therefore, 0.009503/3 moles of aluminum hydroxide weighs 78 × 0.009503/3 = 0.247078 grams
The mass of aluminum hydroxide that will precipitate out ≈ 0.247 grams.
What is the molecule that formed between B and F?
Answer:
Hydrogen bond strengths range from 4 kJ to 50 kJ per mole of hydrogen bonds. In molecules containing N-H, O-H or F-H bonds, the large difference in electronegativity between the H atom and the N, O or F atom leads to a highly polar covalent bond (i.e., a bond dipole).
Explanation:
What is this called? it might be sideways but it show look like a Y
Answer:
I'm thinking it might be Element 39: Yttrium, as this is Chemistry.
Explanation:
What is the relative placement of the Moon, Earth, and Sun during a lunar eclipse?
1.The Sun, Earth, and Moon are aligned with the Earth in the middle and the Moon furthest away from the Sun.
2.The Earth and Sun are aligned with the Moon at a right angle to Earth.
3The Moon and Sun are aligned with the Earth at right a right angle to the Moon.
4The Sun, Earth, and Moon are aligned with the Moon in the center and the Earth furthest away from the Sun.
Answer:
have a good day
Explanation:
1.The Sun, Earth, and Moon are aligned with the Earth in the middle and the Moon furthest away from the Sun.
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What are some ways that propane, butane, gasoline, diesel, and kerosene can be compared?
Answer:
Propane and butane are pure substances, which means that each one of them is made of only one type of molecule—propane molecules or butane molecules. In contrast, gasoline, diesel, and kerosene are not pure substances; they are mixtures of more than one substance.
Explanation:
Hope it is helpful...
Propane, butane, gasoline, diesel and kerosene are all hydrocarbons. They can be produced from petroleum. All these are used as fuels.
What are hydrocarbons ?Hydrocarbons are organic compounds containing C-C backbone and C-H bonds, These compounds are composed of carbons and hydrogens. Different function groups can be added to the hydrocarbons to form various organic compounds such as acids, esters , aldehydes, ketones etc.
Methane is the first hydrocarbon in the hierarchy based on number of carbons. Propane is third in this series since it contains 3 carbons and butane is 4th one. Gasoline, diesel and kerosene are all hydrocarbons with different carbon numbers.
All these are obtained as a byproduct of petroleum. These are used as fuel in vehicles and house holds. The difference in them is the number of carbon and hydrogen.
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CH(4)+ 20(2)→ CO2+ 2H(2)O
22.
The reaction shown above is an example of a -
a. synthesis reaction
b. combustion reaction
c. decomposition reaction
d. double displacement reaction
Answer:
Reaction is a Combustion reaction
Which property or properties can change when the pressure of a gas changes?
Answer: This law states that the volume and temperature of a gas have a direct relationship: As temperature increases, volume increases, when pressure is held constant. Heating a gas increases the kinetic energy of the particles, causing the gas to expand
Explanation:
According to this law, a gas's volume and temperature are directly correlated: When pressure is held constant, volume rises as temperature rises. The kinetic energy of the particles in a gas increases when it is heated, which causes the gas to expand.
What rules apply to gases?According to Boyle's Law, when the temperature and mass are both constant, the volume of a given volume of gas sustained at a constant temperature varies inversely with the applied pressure.
The quantity of gas particles, the volume of the container, and the temperature of the gas all affect the pressure of a gas that is confined. The pressure will rise as the amount of gas particles in a container increases. The pressure will rise as a container's volume increases.
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Whic statements explain why rocks weather at different rates? Check all that apply
Explanation:
Weathering occurs one of three ways: through physical processes such as freezing and thawing, because of live organisms whose roots break rocks or through chemical processes that occur when carbon dioxide in the soil and air and mixes with water and specific minerals in rocks to form a weak acid that reduces rocks into silt, soil and sediment.
Chemical weathering typically increases as temperatures rise and rain falls, which means rocks in hot and wet climates experience faster rates of chemical weathering than do rocks in cold, dry climates.
Read all above and you may just find your answer!Which device converts the mechanical energy of a spinning magnet into electrical energy?
___SeCl6+ ____ O2——> ___ seO2 +___Cl2
If you can do this I need help with more
Answer:
SeCl6 + O2——> seO2 + 3Cl2
“True or False”
Unsaturated solution contains the maximum amount of solute dissolved by a given amount of solvent
ANSWER- True
EPLANATION
are particles in gas close together
Answer:
Solid particles are close together not gas particles
2. How many liters of propane gas (C3H8) will undergo complete combustion with 34.0 L of oxygen gas? ___ C3H8 (g) + ___ O2 (g → ___ CO2 (g + ___ H2O(g
Answer:
6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.
Explanation:
Given;
combustion reaction of propane and oxygen;
C₃H₈ + O₂(g) → CO₂(g) + H₂O(g)
Balance the chemical reaction as follows;
C₃H₈ + 5O₂(g) → 3CO₂(g) + 4H₂O(g)
From the balanced equation;
1 mole of C₃H₈ ---------------- 5 moles of 5O₂(g)
x Liters of C₃H₈ ----------------- 34.0 Liters of O₂(g)
x = 34 liters / 5
x = 6.8 liters
Therefore, 6.8 liters of propane gas will undergo a complete combustion with 34.0 L of oxygen gas.
What is the relationship between Force and Velocity?
Affect/Effect
Cause/Blame
Claim/Reasoning
Cause/Effect
Answer:
Cause/ effect relationship.
Explanation:
because the force is the cause of energy that is present and velocity is the effect (speed) that is present.
EMERGENCY!!! Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers
Answer:
A. the valence electrons
Explanation:
Answer:
The valence electrons
Explanation:
The valence electrons determine an element's properties because chemical properties of each element are determined by the element's electronic configuration and PARTICULARLY by its outermost valence electrons. I hope it helps!
~Good luck
A ball is moving at a speed of 6.70 m/s. If the kinetic energy of the ball is 3.10 J, what is the mass of the ball?
Answer:
0.14 kgExplanation:
The mass of the ball can be found by using the formula
[tex]m = \frac{2k}{ {v}^{2} } \\ [/tex]
v is the velocity
k is the kinetic energy
From the question we have
[tex]m = \frac{2(3.10)}{ {6.70}^{2} } = \frac{6.20}{44.89} \\ = 0.138115...[/tex]
We have the final answer as
0.14 kgHope this helps you
When using a light microscope, focus the specimen with the scanning objective
lens first.
Reasoning:
Answer:
The light microscope bends a beam of light at the specimen using a series of lenses to provide a clear image of the specimen to the observer.
Which of the following is NOT n intensive property?
A. Magnetism
B. Boiling point
C. Thermal conductivity
D. Volume
What math is used to find density?
Answer:
[tex]\huge\mathtt{{\colorbox{silver}{ANSWER~~~↴}}}[/tex]
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
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A student heats a 2.5 g sample of calcium carbonate in a test tube. What mass of calcium oxide remains in the test tube when the reaction is complete?
CaCO3(s) = CaO(s) + CO2(g)
Select one:
a. 1.4 g CaO
b. 2.1 g CaO
c. 2.5 g CaO
d. 1.0 g CaO
Answer:
1.4 g CaO
Explanation:
Given data:
Mass of calcium carbonate = 2.5 g
Mass of Cao remain in tube = ?
Solution:
Chemical equation:
CaCO₃ → CaO + CO₂
Number of moles of CaO:
Number of moles = mass/molar mass
Number of moles = 2.5 g/ 100 g/mol
Number of moles = 0.025 mol
now we will compare the moles of CaO with CaCO₃.
CaCO₃ : CaO
1 : 1
0.025 : 0.025
Mass of CaO:
Mass = number of moles × molar mass
Mass = 0.025 mol × 56 g/mol
Mass = 1.4 g
Answer:
1.4g CaO
Explanation:
Did the exam and got it right. Hope this helps
3. Hydrogen reacts with nitrogen to produce ammonia according to the equation:
3H2(g) + N2(g) 2NH3(g)
Determine how much ammonia would be produced if 100g of N2 reacts?
Mass of ammonia produced : 121.38 g
Further explanationGiven
Reaction
3H₂(g) + N₂(g) ⇒ 2NH₃(g)
100g of N₂
Required
Ammonia produced
Solution
mol of N₂ :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{100}{28}\\\\mol=3.57[/tex]
From the equation, mol ratio of N₂ and NH₃ = 1 : 2, so mol NH₃ :
[tex]\tt \dfrac{2}{1}\times 3.57=7.14~moles[/tex]
mass of NH₃(MW=17 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=7.14\times 17\\\\mass=121.38~g[/tex]
i need to know what occupied vs full means for chemistry
15. Name the element that has 3 energy levels and 3 valence electrons. *
Answer:
aluminium ..............