Answer:
photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.
Answer: The Photoelectric Effect occurs when a light withdraws an electron from a metal. The light must have at minimum the necessary energy to expel a particle from the surface of the metal. As a lack of a better description, consider sodium metal.
Explanation:
a change to any gas in the atmosphere affetcs energy absorbed by the surface in the same way.
Agree or Disagree?
A change to any gas in the atmosphere affects energy absorbed by the surface in the same way of green house effect.
What is green house effect?Green house effect is a phenomena in which energy from the sun comes to the earth and the gases which are present in the atmosphere of the earth absorbs the energy from the sun and raises earths temperature.
The gases which are especially responsible for this effect are carbon dioxide, methane, nitrous oxide, ozone and vapors of water. Change in the concentration of this gases will affect the energy absorbed by the surface.
Hence, this is same like green house effect.
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What type of source would provide you with the most reliable information on gas efficiency in a new car model?
A peer-reviewed study by university researchers.
A close friend.
A personal blog.
A study completed by the car manufacturer.
Answer:
A peer-reviewed study by university researchers.
Explanation:
The manufacturer of the car might be interested in making the car look more efficient than it is.
Snow that falls on the ground melts slowly. Snow that falls on Stefan’s nose melts very
quickly.
Give a reason for this.
______________________________________________________________________________
Answer:
because Stefan's nose is so warmer than the ground.
ground have a same temperature like air but nose of human have maybe 32°C.
When solid converts to liquid then heat is required to break the intermolecular forces of attraction between the particles. In this process heat increase but temperature remains the same. Snow that falls on Stefan’s nose melts very quickly because Stefan's nose is so warmer than the ground.
What is phase transition?Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.
During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing.
Snow that falls on the ground melts slowly. Snow that falls on Stefan’s nose melts very quickly because Stefan's nose is so warmer than the ground. Ground have a same temperature like air but nose of human may have 32°C.
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A gas occupies a volume of 50.0mL at 27°C and 630mmHg. At what temperature, in C°, would the pressure be 101.3kPa if the volume remains constant? 5. A sample of gas is initially at STP. What would the pressure be if the temperature were increased to 819°C?
Answer:
Explanation: pls read what i wrote i don't know if it's correct but i just tried to solve it
Please Help Me
What must a mining company do to protect the environment from potential damage?
options:
Raise herds of deer to replace any species that are displaced.
Build smelters and processing plants on flat ground, not hillsides.
Prevent mining wastes from entering water sources and the air.
Allow only nitrogen and sulfur compounds to be released into the air.
Answer:
Prevent mining wastes from entering water sources and the air
Elements that are shiny and are good conductors of electricity are:
a. Non-metals
b Metals
c. Halogens
d. Compounds
Answer:
Metals
Explanation:
How many gram of oxygen gas are produced from 6.0 mols of carbon dioxide?
Answer:
From the mole ratio of the gases, 10 moles of hydrogen will produce 10 moles of water, and if 10.0 L of hydrogen and 6.0 L of oxygen were used, 10.0 L of water will be produced.
What is the mole ratio of reactants in the formation of water?
The mole ratio of the reactants in the formation of water can be shown from the equation below:
Mole ratio of hydrogen to oxygen is 2:1
10 moles of hydrogen will require 5 moles of oxygen, therefore hydrogen is the limiting reactant.
10 moles of hydrogen will produce 10 moles of water.
1 mole of a gas has a volume of 22.4 L.
If 10.0 L of hydrogen and 6.0 L of oxygen were used, 10.0 L of water will be produced.
Therefore, the volume ratio of gas equals mole ratio of gas
Explanation:
Answer: 192g O2
Explanation:
Balanced equation
S + O2 → SO2
1mol O2 produces 1 mol SO2
6mol O2 required to produce 6 mol SO2
Molar mass O2 = 32g/mol
Mass of 6 mol O2 = 6*32 = 192g O2 required.
Is the dissolution of borax in water a temperature dependent reaction or is it spontaneous at all temperatures at which water is liquid? briefly explain
The dissolution of borax in water is a temperature dependent reaction. With the higher temperature, the salt dissolve quickly.
What is borax?
Borax is the hydrate salt of boric acid. It is white and widely used in cleaning and in laundry detergent.
Borax is a salt that will dissolve in water at almost any temperature, with the exception of steam and ice.
However, as with any salt, the higher the temperature, the faster the salt dissolves, so speed is dependent on temperature. It will dissolve in cold water, but it will take longer.
Thus, the dissolution of borax in water is a temperature dependent reaction.
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Which product of the electron transport chain reenters the krebs cycle? a. atp b. coa c. nad d. nadh e. pyruvate
The product of the electron transport chain that reenters the krebs cycle is NAD. Details about electron transport chain can be found below.
What is cellular respiration?Cellular respiration is the process by which living organisms break down food molecules in their cells.
The process of cellular respiration involves the following stages:
GlycolysisKrebs cycleElectron transport chainThe electron transport chain is a series of reactions that involve the transfer of electrons from one molecule to another. NAD+ is one of the electron acceptor and products of the ETC that reenters the kreb cycle.
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Plssssss helppppp
branliest
write the balanced complete ionic equation for the reaction when ammonium carbonate and calcium chloride are mixed in aqueous solutionif no reaction occurs, simply write only nr.
What is the process that keeps heat from being transferred between two substances is
Answer:
Conduction, Convection, and Radiation .......
what are the three steps of water treatment?
Answer:
primary, secondary and tertiary water treatment.
Explanation:
Suppose you learn that November is the main termite-fishing season, when chimps spend a large part of their time eating termites. Predict how the chimp diet might be different in the month of May
calculate the molarity of a solution made of 10 moles of salt with 5 liters of water.
Answer:
2 M
Explanation:
molarity = (moles of solute)/(liters of solution)
molarity = 10/5 = 2 M
WILL MARK BRAINLIST!! The image depicts the composition of air. Use the image to explain why this statement is correct: “Mixtures are composed of different proportions of pure substances.”
Answer:
Air is a mixture, and the image shows that it is composed of different amounts of the same several pure substances.
Explanation:
water, O2, and carbon dioxide (all mixtures) are made of pure substances like hydrogen, oxygen, and carbon.
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express your opinion against the theory of evolution
Answer:
The Theory of Evolution
Explanation:
it had many struggles but think of how we grew I agree with the theory of evolution because it has shown that studies of animals were here before humans
When aqueous solutions of potassium hypochlorite and nitric acid are mixed, an aqueous solution of potassium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction
The net ionic equation for the reaction between aqueous solutions of potassium hypochlorite and nitric acid is NO₃⁻ + K⁺ → KNO₃.
What is net ionic equation?The net ionic equation is a chemical equation that determines which ions are involved in the final product's creation.
Chemical reaction will be represented as:
HNO₃(aq) + KClO(aq) → KNO₃(s) + HClO(aq)
Ionic equation for the above reaction will be represented as:
H⁺ + NO₃⁻ + K⁺ + ClO⁻ → KNO₃ + H⁺ + ClO⁻
In the above equation H⁺ and ClO⁻ are the spectator ions, so the net ionic equation of the given chemical reaction is:
NO₃⁻ + K⁺ → KNO₃
Hence net ionic equation for the given reaction is NO₃⁻ + K⁺ → KNO₃.
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Laughing gas is a compound called dinitrogen
monoxide. what amount (in mol) of dinitrogen
monoxide, n2o(g), contains 3.40 x 10^23 molecules?
(Please Help!) Aluminum reacts with oxygen to produce aluminum oxide (AI203). The balanced chemical equation for this reaction is: *see attachment*
How many oxygen atoms are in the reactants and in the products?
Why does the reaction of aluminum with oxygen illustrate the law of conservation of mass?
#1
Moles of Oxygen =3
Molecules:-
3×Avagadro no3(6.022×10²³)18.066×10²³1.8066×10²²molecules#2
Its because according to law of conservation of mass- Mass is neither created nor destroyed
AS ITS BALANCED SO BOTH SIDES ARE SAME .
HENCE THEY OBEY
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
As per the given reaction, we can clearly observe that :
#1. How many Oxygen atoms are there in reactant and product side ?
- The number of Oxygen atoms is same as in reactant Side and product side, that is 6 atoms ~
#2. How does the reaction illustrate the law of conservation of mass ?
- According to law of conservation of mass, mass can neither be created nor be destroyed in a chemical reaction. so the mass of each element on reactant Side should be equal to that in the product side.
Now, let's check out if it's true for the given reaction ~
Mass on reactant side :[tex]\qquad \sf \dashrightarrow \: 4(27) + 3(32) = 2 \{(2 \sdot27) + (3 \sdot16) \}[/tex]
[tex]\qquad \sf \dashrightarrow \:108 + 96= 2 \{54+ 48\}[/tex]
[tex]\qquad \sf \dashrightarrow \:204= 2 \{102\}[/tex]
[tex]\qquad \sf \dashrightarrow \:204= 204[/tex]
Hence, it's verified ~ that it follows law of conservation of mass ~
There must be the same number of each type of atoms (element/ion) on each side of a balanced chemical equation
A balanced equation contains the same number of atoms of the element on both sides of the equation. The statement is true.
What is a balanced equation?A balanced equation is the representation of the molecules or the compound of the reactants on the left and the product on the right side of the reaction equation with their stoichiometry coefficients and symbols.
The number of the atoms of the molecules on the reactant side and the product side of the same element must be equal so, that the law of the conservation of mass is justified.
Therefore, the statement is true.
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Balance this equation
H2SO4 + MgCl2 = MgSO4 + HCI
Answer:
1 H2SO4+ 1 MgCl2 = 1 MgSO4+ 2HCl
Can someone solve this concept map for me
Filling that table
#Solid in liquid
gelatin#solid in a gas
Camphor in Nitrogen gas#Gas in a liquid
Oxygen in water#Solid in a liquid
Sugar solution#Liquid in gas
Chloroform in NitrogenDescribe the importance of the water cycle in the terms of;
i.improving water table
ii. regulating weather patterns
iii.provision of clean water
Answer:
ii.
Explanation:
Regulating weather patterns
What kind of eclipse is this
Total solar eclipse
Lunar
Annular
Partial lunar eclipse
Limitation for osmosis experiment
write the net ionic equation and identify the spectator ions KOH+NaCl
KOH+NaCl⇒NaOH+KCl
there is no net ionic equation because all compounds dissolves
A chemical engineer is developing a process for producing a new chemical. One step in the process involves allowing a solution of potassium hydroxide to react with a solid.
Which action would most likely increase the reaction rate for this step?
using larger pieces of the solid
using a more concentrated potassium hydroxide solution
adding water to the system
the 2nd one is correct
The option that would most likely increase the rate for a more contentrated potassium hydrogene
:) hope this helps
using a more concentrated potassium hydroxide solution
Concentration is one of the factors that affect the rate of reaction
The higher the concentration, the higher the reaction rate
convert 0.876 atm to mmHg. solution: multiply the atm value by 760.0 mmHg/ 1.0 atm 0875 atm x _______ = _______ mm Hg (3 sig figs)
[tex]\tt \dfrac{760~mmHg}{1~atm}\times 0.876~atm=665~mmHg[/tex]
Write a balanced half-reaction for the reduction of permanganate ion mno−4 to solid manganese dioxide mno2 in acidic aqueous solution. Be sure to add physical state symbols where appropriate
The half-reaction includes either the reduction or the oxidation reaction of the redox reactions. In acidic solution permanganate ion will react with hydrogen ion to yield manganese ion and water.
What are Redox reactions?
Redox or oxidation-reduction reactions are the chemical reactions in which the oxidation and the reduction of the chemical species occur simultaneously.
Permanganate (VII) ion is a strong oxidizing agent and gets easily reduced to manganese ion in presence of the hydrogen ion in an acidic solution.
The balanced half-reaction for reduction is shown as,
[tex]\rm MnO_{4}^{-} \; (aq)+ 8H^{+} \; (aq)+ 5e^{-} \rightarrow Mn^{2+} \; (aq)+ 4H_{2}O \; (l)[/tex]
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The condensed formula, CICH2CHCl2,
represents:
Please help asap
Answer:
Option B
Explanation:
The given alkyl chloride having molecular formula ClCH2CHCl2, have IUPAC name 1,1,2 - trichloride ethane which can be represented in structural formula as shown in Option B, where the right carbon atom receives lower integer in numbering i.e. 1 and on the first carbon atom because it have two Chlorine atoms, and second carbon atom is numbered 2, having one Chlorine substituent on it.
Another reason for option A is incorrect answer, because the number of atoms in molecular formula & number of atoms in structural formula ain't same, in molecular formula there is a -CH2- & a -CH- substituent present, but in option A both the carbon atoms are -CH2- bonded to each other with chloride linkage.
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Answer:
Option B
Explanation:
The structural formula Cl-CH₂-CH-Cl₂ represents the compound 1,1,2 - trichloride ethaneOption A represents a different compoundOption B correctly represents the structure with respect to the structure and arrangement of atoms