Answer:
Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. It is destroyed more quickly than it is created
Answer:
Ozone depletion, gradual thinning of Earth’s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinning is most pronounced in the polar regions, especially over Antarctica. Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth’s surface, which increases the rate of skin cancer, eye cataracts, and genetic and immune system damage. The Montreal Protocol, ratified in 1987, was the first of several comprehensive international agreements enacted to halt the production and use of ozone-depleting chemicals. As a result of continued international cooperation on this issue, the ozone layer is expected to recover over time.
I HAVE 5 MINUTES LEFT ON THIS TEST PLEASE HELP
Mr. Marcum is a research chemist who is testing a sample to determine its properties. He moved the sample from one container to another.
sample kept the same volume, but its shape changed. From the behavior of the sample, Mr. Marcum knows that the particles that make up
sample touch each other but are free to slide by each other. What is the state of this sample?
O
A gas
O
B.liquid
C. plasma
D. Solid
Answer:
liquid
Explanation:
At which of the four labeled points on the titration curve below do you expect to find the highest concentration of hydroxide
ions?
A
B
C
D
Answer:
D.
Explanation:
Hydroxide ions are produced when acid reacts with a base under a Ph value of more than 7. Hydroxide ions are negatively charged ions which are released in the aqueous solution during titration process. It a oxygen and hydrogen atom covalent bond.
Why do scientists use scientific notation? A. It provides an easier way to write the element names. B. It provides an easier way to write chemical formulas. C. It provides an easier way to write scientific words. D. It provides an easier way to write very large and very small numbers.
Answer:
D
Explanation:
Scientists will use a scientific notation because, it provides the easier way to write a very large and very small numbers. Option D is correct.
Scientists use scientific notation to express numbers that are extremely large or small. Scientific notation allows for a more concise representation of these numbers by expressing them as a product of a coefficient and a power of 10.
For very large numbers, scientific notation makes it easier to handle and compare values. It allows scientists to focus on the significant digits and the scale of the number without having to write out all the zeros. It also simplifies calculations and reduces the chance of errors when dealing with such large values.
Similarly, for very small numbers, scientific notation provides a convenient way to express values without writing out a large number of decimal places. It allows scientists to express the magnitude of the number in a concise manner and enables easier comparison and calculations with other values.
Scientific notation is widely used in scientific fields such as physics, chemistry, astronomy, and engineering, where dealing with numbers of varying magnitudes is common. It provides a standardized and efficient way to represent and work with very large and very small numbers.
Hence, D. is the correct option.
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Why nitration of benzene is easier than that of benzene......... And how is phenol converted to TNT
Answer:
The nitration of phenol is easier than that of benzene because benzene has delocalised pie-electrons which makes it more stable than phenol.
Phenol is converted to Trinitrotoluene by adding zinc dust to remove the hydroxyl group, then reacted with Aluminium oxide followed by haloalkane.
Will give brainliest
Process name of water vapor to ice
Answer:
Deposition
this is the process of a substance changing its state from gas to solid. Solid to gas is known as sublimation
What chemical reaction happens when water breaks down into hydrogen and oxygen
Answer:
bldg licking no-good also
Answer:
Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.
Lussac's Law, the pressure of a gas increases due to an increase in temperature because Group of answer choices the molecules strike the walls of the container more often. there is an increase in the number of gas particles. there is a decrease in the volume of the container. the molecules get bigger. the molecules strike the walls of the container less often. PreviousNext
Answer:
the molecules strike the walls of the container more often.
Explanation:
The pressure of a gas refers to the force per unit area exerted on the walls of container by gas molecules.
Since the average kinetic energy of gas molecules increases as the temperature of the gas increases, the molecules of the gas tend to strike the walls of the container more often as the temperature of the gas increases.
Hence, the pressure of a gas increases due to an increase in temperature because the gas molecules strike the walls of the container more often.
_______ are events that disrupt the stability of a whole ecosystem.
A.Resources
B.Disturbances
C.Species
How many moles of oxygen gas are consumed in the production of 5.00 g of iron(III) oxide from metallic iron? 4Fe(s)+3O2(g)→2Fe2O3(g) _____ mole(s) O2
Answer:
0.0469 mol of 02.
Explanation:
The balanced equation of this reaction is given as follows:
4Fe(s) + 3O2(g) → 2Fe2O3(s)
According to this equation, 3 moles of oxygen gas (O2) is consumed to produce 2 moles of iron(III) oxide (Fe2O3).
Using the formula, mole = mass/molar mass to convert mass of Fe2O3 to mole
Molar mass of Fe2O3 = 56(2) + 16(3)
= 112 + 48
= 160g/mol
mole = 5.00 g ÷ 160g/mol
mole = 0.03125mol of Fe2O3
Since 3 moles of oxygen gas (O2) is consumed to produce 2 moles of iron(III) oxide (Fe2O3).
0.03125mol of Fe2O3 will be produced when (0.03125 × 3/2) mol of oxygen gas is consumed.
0.03125 × 3/2
0.03125 × 1.5
= 0.0469 mol of 02.
Please help! I don't know how to do and want to understand
In which classification of matter are the components chemically combined?
A metal
B compound
C mixture
D Metalloids
_ As + _ NaOH → _Na3AsO3 + _H2
The atoms of which element bond to one another in chains, rings, and networks?
1.
barium
2.
carbon
3.
iodine
4.
mercury
Submit An:
How many molecules of oxygen are in the cylinder
Answer:
A gas cylinder contains exactly 15 moles of oxygen gas (02)
What are the names of those?
Answer:
formula tree
Explanation:
True or false:
The following equation is balanced properly: 6CO2 + 6H2O → C6H12O6 + O2
What is the volume of .750 M hydrochloride acid required to react completely with 25.00 mL of .290 M NaOH solution?
from
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
from
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Va=9.67ml
The volume of .750 M hydrochloride acid is required to react completely with 25.00 mL of .290 M NaOH solution is 9.67ml
HCl + NaOH----> NaCl +H2O
n of acid=1
n of base=1
Molarity of acid=750M
Molarity of base=290M
volume of base=25ml
Therefore,
Va=Mb ×vb×na
Ma×nb
Va=290×25×1
750×1
Va=7250
750
Hence,
Va=9.67ml
What is Hydrochloric acid?
Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctively pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans. Hydrochloric acid is an important laboratory reagent and industrial chemical.
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how many moles of H2 are required to make 10 moles of water?
Explanation:
10 moles h20 is required
10 moles of H₂ are required to make 10 moles of H₂O.
What is Stoichiometry ?Stoichiometry is an important concept which helps us use the balanced chemical equation to measures the amount of reactants and products.
What is Balanced Chemical equation ?A balanced chemical equation is chemical equation that has equal number of atoms on both sides of arrow that is reactant and product.
First we have to write the Balanced chemical equation
2H₂ + O₂ → 2H₂O
To produce 2 moles of water, 2 moles of hydrogen are required to produce 10 moles of water.
So,
[tex]\frac{2\ \text{moles of}\ H_2}{2\ \text{moles of}\ H_2O}[/tex] × 10 moles of H₂O
= 10 moles of hydrogen are required.
Thus, from above conclusion we can say that 10 moles of H₂ are required to make 10 moles of H₂O.
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Which of the following is not a compound? HCl Cl2 NaCI CO2
Answer:
CO2 it is an element.
Hope it helps:)
which of the following is a property of acids
A. they are slippery
B. They taste bitter
C. They react with oils
D. they are sour
Answer:
They are sour. =)
Explanation:
What is Photosynthesis?
Answer:
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Photosynthesis is a process by which plants and other organisms, such as algae, convert solar energy into chemical energy and use it to produce organic molecules. Photosynthesis is the main source of energy in the biosphere.
If the power source in a motor was to be replaced with an electrical load, and the armature was turned by hand, then what device have you made?
Answer:
This question doesnt make much sense but ill try to answer it.
A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electricity. If the shaft of a DC motor is turned by an external force, the motor will act as a generator. DC Motor rotation does have to do with the voltage polarity and the direction of the current flow.
9. Which of the following is a nucleotide found in DNA?
1
O
deoxyribose sugar, phosphate, nitrogenous base
ribose sugar, amino acid, nitrogenous base
ribose sugar, phosphate, nitrogenous base
deoxyribose sugar, amino acid, nitrogenous base
Number of molecules in 16 grams of h2co3
For this one u can work out the amount of moles in h2co3 by using moles=mass/mr(of h2co3 is 52)
so 16/62=0.258moles then u use the equation
number of particle = moles × 6.02×10^23
=0.258×6.02 ×10^23
=1.55×10^23 molecules.
hope this helps
Do you think it matters if you
report 150 grams as 150
grams or 150.0 grams? Do
they mean the same thing?
Why or why not?
Answer:
yes I do think they mean the same thing
Explanation:
150 grams and 150 grams is the same thing and adding 0 to the end of a decimal does not change its value, you could even put 150.0000000 grams and it would still be equivalent to the other numbers
the act of salt and sugar dissapering in water is called
Answer:
dissolving
Explanation:
Answer:
dissoliving
Explanation:
salt and sugar are both soluble
Compound
a)magnesium+carbon+oxygen
b)copper+sultry+oxygen
c)barium+nitrogen+oxygen
HELPPPP pleaseeeeee!!!!
Answer:
Length=Meter
Mass=Kilogram
Time=Second
Explanation:
Si is the International System of Units and means not just the U.S metric system.
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Copper(II) sulfate is an active ingredient in tree stump remover. In order to help remove
a tree that was causing foundational damage to a school, a chemistry student soaked
the roots with copper(ll) sulfate. The removed tree was later dried and used as
firewood. Assuming the copper(II) sulfate is present in the wood, what color would be
observed in the fire?
Answer:
the tree red
Explanation:
Copper (II) substances burn to produce bluish-green flames.
Flame test for copper (II)The copper (II) present in the wood will make the flame produce a bluish-green color.
This is because copper (II) compounds are known to produce flame colors that range from blue to bluish-green when tested in the laboratory.
This is because the electrons in the atoms of copper lose energy and drop to lower energy, releasing the lost energy as light in the process.
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Part C
For each source of energy, describe its strengths and weaknesses with respect to the ideal source you described in part A. Do Internet research, as needed, to describe each energy source.
Question 1
Describe at least two advantages and two disadvantages of using natural gas as a source of energy.
Answer:
See explanation
Explanation:
Natural gas is mined along with crude oil in many oil wells. It has the advantage of being a cheap fossil fuels which is easily obtainable.
Generally, natural gas is the cleanest of all the fossil fuels. This means that it is the fossil fuel that least contributes to environmental pollution.
On the other hand; natural gas produces some amount of sulphur as it is burnt and mercury as particulate matter. These substances are quite dangerous to health.
Secondly, the combustion of natural gas leads to the production of the oxides of nitrogen which play a key role in the occurrence of photochemical smog.