Answer:
Yes. u can because its easy to tell if an item will sink or float usually by the weight or the width
Explanation:
A car moving at 12 m/s applies its brakes and comes to a stop in 2 s. What was its acceleration?
Answer:
6 m/s²Explanation:
The acceleration of an object given it's velocity and time taken can be found by using the formula
[tex]a = \frac{v}{t} \\ [/tex]
where
a is the acceleration
v is the velocity
t is the time
From the question we have
[tex]a = \frac{12}{2} \\ [/tex]
We have the final answer as
6 m/s²Hope this helps you
Describe what happens when ice changes
into liquid water.
Answer:
When ice changes into liquid water it melts. The solidified ice in the frozen, would melt via the burning sun shooting its streaks down at the ice. Which causes the ice to melt, and turn into liquid water.
Explanation:
pp poopoo
In which stage do cells spend most of their time?
Interphase
Answer:
Interphase
Explanation:
I think you answered your own question chief? lol
Answer:
Explanation:
Heres your answer! (or what I think is) A cell cycle is a series of events that takes place in a cell as it grows and divides. A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.
Convert the following sentence into an equation and balance it.
When heated, solid iron(1) carbonate breaks down into solid iron(1) oxide and carbon dioxide gas.
can DDT only be synthesized one way?
Answer:
DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations. It also was effective for insect control in crop and livestock production, institutions, homes, and gardens. DDT's quick success as a pesticide and broad use in the United States and other countries led to the development of resistance by many insect pest species.
Regulation Due to Health and Environmental Effects
The U.S. Department of Agriculture, the federal agency with responsibility for regulating pesticides before the formation of the U.S. Environmental Protection Agency in 1970, began regulatory actions in the late 1950s and 1960s to prohibit many of DDT's uses because of mounting evidence of the pesticide's declining benefits and environmental and toxicological effects. The publication in 1962 of Rachel Carson's Silent Spring stimulated widespread public concern over the dangers of improper pesticide use and the need for better pesticide controls.
In 1972, EPA issued a cancellation order for DDT based on its adverse environmental effects, such as those to wildlife, as well as its potential human health risks. Since then, studies have continued, and a relationship between DDT exposure and reproductive effects in humans is suspected, based on studies in animals. In addition, some animals exposed to DDT in studies developed liver tumors. As a result, today, DDT is classified as a probable human carcinogen by U.S. and international authorities.
DDT is:
known to be very persistent in the environment,
will accumulate in fatty tissues, and
can travel long distances in the upper atmosphere.
After the use of DDT was discontinued in the United States, its concentration in the environment and animals has decreased, but because of its persistence, residues of concern from historical use still remain.
Current Status
Since 1996, EPA has been participating in international negotiations to control the use of DDT and other persistent organic pollutants used around the world. Under the auspices of the United Nations Environment Programme, countries joined together and negotiated a treaty to enact global bans or restrictions on persistent organic pollutants (POPs), a group that includes DDT. This treaty is known as the Stockholm Convention on POPs. The Convention includes a limited exemption for the use of DDT to control mosquitoes that transmit the microbe that causes malaria - a disease that still kills millions of people worldwide.
In September 2006, the World Health Organization (WHO) declared its support for the indoor use of DDT in African countries where malaria remains a major health problem, citing that benefits of the pesticide outweigh the health and environmental risks. The WHO position is consistent with the Stockholm Convention on POPs, which bans DDT for all uses except for malaria control.
DDT is one of 12 pesticides recommended by the WHO for indoor residual spray programs. It is up to individual countries to decide whether or not to use DDT. EPA works with other agencies and countries to advise them on how DDT programs are developed and monitored, with the goal that DDT be used only within the context of programs referred to as Integrated Vector Management. EXIT IVM is a decison-making process for use of resources to yield the best possible results in vector control, and that it be kept out of agricultural sectors.
Explanation:
hope this helps
If two organisms are classified in different orders but are in the same class, which of these statements is true?
The group of statements are given below that are required to answer the question:
The organisms have the same genus.
The organisms are in the same phylum.
The organisms are in different kingdoms.
The organisms are members of the same species.
Answer:
The correct answer is: The organisms are in the same phylum
Explanation:
The Phylum is the classification rank or rank in the hierarchy which includes the organism of the same classes but different orders which means the organisms of phylum show the difference on order level.
Species and genus are the least inclusive ranks the which means they have fewer organisms and come on a lower level of the hierarchy or classification ranks.
Thus, the correct answer is - option - The organisms are in the same phylum
Which of the following statements is true? Fusion breaks apart nuclei; fission puts them together. Fission breaks apart nuclei; fusion puts them together. Fission and fusion have identical reactions.
Answers:
Fission breaks apart nuclei
Fusion puts them together.
======================================================
Explanation:
The term "fission" is related to the term "fissure" which means "a cut or divide", often describing a geologic feature of the earth (eg: a crack in the rock).
Fusion is the idea of putting things together, which is the opposite of fission. The term doesn't have to apply to nuclear fusion. It could be something like the fusing of two ideas to create one new idea.
Answer:
the 2nd one
Explanation:
i need help with this
Answer: B
Explanation: Most of the time they form over oceans which bring cool and moist weather.
Based on the passage, which of the following best describes the greenhouse effect
Answer:
The process by which radiant heat from the atmosphere heats up the Earth’s surface, making it warm enough for humans.
Explanation:
According to the text, “The gases in the atmosphere that hold heat are called greenhouse gases, and the cycle by which they heat the Earth is called the greenhouse effect.”
Greenhouse effect is the warming of atmosphere of the earth due to trapping of heat.
What is the greenhouse effect?The greenhouse effect is the phenomenon in which heat is trapped close to Earth's surface by greenhouse gases such as carbondioxide, methane and water vapors etc. Because of this effect, our earth experience warm environment.
So we can conclude that greenhouse effect is the warming of atmosphere of the earth due to trapping of heat.
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Asappp plzz help mee
Which of the following corresponds to an alpha particle?
A. A helium nucleus, with an atomic number of 1 and an atomic
mass of 2
O B. A hydrogen nucleus, with an atomic number of 1 and an atomic
mass of 1
C. A helium nucleus, with an atomic number of 2 and an atomic
mass of 2
D. A helium nucleus, with an atomic number of 2 and an atomic mass
of 4
The statement that corresponds to an alpha particle is a helium nucleus, with an atomic number of 2 and an atomic mass of 4.
What is an alpha particle?Alpha particle is a positively charged nucleus of a helium-4 atom (consisting of two protons and two neutrons), emitted as a consequence of radioactivity.
The alpha(α) particle has a symbol of 4/2He; suggesting that the atomic number is 2 and the atomic mass is 4.
Therefore, the statement that corresponds to an alpha particle is a helium nucleus, with an atomic number of 2 and an atomic mass of 4.
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What is the molarity of I-(aq) in a solution that contains 34 g of SrI2 (molar mass 341 g) in 1.0 L of the solution? Show Work!
1. 0.068 M
2. 0.034 M
3. 0.20 M
4. 0.10 M
Answer: 0.20 M
Explanation:
The molarity of I-(aq) in a solution that contains 34 g of SrI2 (molar mass 341 g) in 1.0 L of the solution is 0.20 M.
What is molarity?Molarity is also known as molar concentration and it is specific measure of the chemical species's concentration in a specific solute which is present in the solution in per unit volume. The very much used unit of molarity is total number of moles present in every liter, which is represented by mol/L .
Molarity is represented by M or mol/L and one molar solution means 1 M of solution. Molarity has several importance in the field of chemistry for a very important reason as we know that in a mixture molarity is the measurement of the concentration of the particular mixture.
Molarity is calculated as moles of solute divided by liters of solution is equal to molarity or molar concentration. The very much used unit of molarity is total number of moles present in every liter, which is represented by mol/L .
Therefore, The molarity of I-(aq) in a solution that contains 34 g of SrI2 (molar mass 341 g) in 1.0 L of the solution is 0.20 M.
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plz am in need of thise what is a catalyst
Answer: Catalyst - A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
Explanation:
Which pair of elements has the most physical and chemical properties in common?
Ge and Se
K and Kr
Al and Ga
Ba and Bi
The elements have the most physical and chemical properties in common are aluminum and gallium. Therefore, option C is correct.
What are chemical properties ?A chemical property is any of a material's features that becomes obvious during, or after, a chemical reaction; that is, any quality that can be proven only by changing a substance's chemical identity.
The physical and chemical characteristics of elements that are found in the same group on the periodic table are comparable. These elements also share the same number of valence electrons. As a result, the physical and chemical properties of elements belonging to the same group are comparable.
Color, density, hardness, and melting and boiling points are examples of physical qualities. The capacity of a substance to go through a particular chemical transition is described by its chemical property. We search for a chemical change to locate a chemical attribute.
Thus, option C is correct.
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In the following reaction, which species is reduced? Au(s) + 3NO3-(aq) + 6H+(aq) → Au3+(aq) + NO(g) + 3H2O (l) H+ N+5 O2- H2O Au
Answer:
NO3-
Explanation:
Given the reaction equation;
Au(s) + 3NO3-(aq) + 6H+(aq)→Au3+(aq) + 3NO2(g) + 3H2O (l).
We can consider the oxidation states of species on the left and right hand sides of the reaction equation;
Au is in zero oxidation state on the left hand side and an oxidation state of +3 on the righthand side.
NO3- is in oxidation state of +5 on the righthand side and NO2 is in + 4 oxidation state.
H+ is in + 1 oxidation state on both the left and right hand sides of the reaction equation.
Since reduction has to do with a decrease in oxidation number, it follows that NO3- was reduced in the reaction.
Describe the chemical reaction based on the chemical equation below. Also, explain whether the equation is balanced.
Answer:
edg 2020
Explanation:
Ammonia gas reacts with oxygen gas.
Nitric oxide gas and liquid water are produced.
Platinum is used as a catalyst.
The equation is unbalanced because the number of hydrogen atoms is not the same on both sides of the equation.
Answer:
Ammonia gas reacts with oxygen gas.
Nitric oxide gas and liquid water are produced.
Platinum is used as a catalyst.
The equation is unbalanced because the number of hydrogen atoms is not the same on both sides of the equation.
Explanation:
For edge:)
Which ion is common to all alkalis
Can you use volume alone to predict whether an object will sink or float? Explain.
Answer:
The answer is: No
Explanation:
Density determines if an object will sink or float, not volume.
Volume is the quantity of three-dimensional space enclosed by a closed surface.
H-S-H
o bent
O linear
tetrahedral
Answer:B or bent
Explanation: It's asking to Use the Lewis structure to predict the molecular geometry of each molecule. and the question is H-H-S-H with two dots above and below the S only. I know this because this is a question on Edge 2022.
Plzz help mee asapp dmxkxksms
Answer:
1. a part of the soil that contains decayed plant or animal matter
2. erosion
3. topsoil
Explanation:
Hope this helped :)
Which natural event can occur either over a few weeks or over a few million years?
OA. formation of a tornado
OB. flooding caused by a rainstorm
OC.
formation of a volcano
OD
a tsunami hitting a coastal area
Answer:
maybe formation of a volcano
Explanation:
I think the other events probably won't take few million years to occur
Also small mountains can be formed in months
ASAP HELPP PLEASE
Phosphorus
pentafluoride is a known toxic, colorless gas while nitrogen pentafluoride is only a
theoretical compound. Justify this statement. Use your knowledge about the octet rule, its
exceptions and atomic orbitals in your explanation
Answer:
Explanation:
Nitrogen cant form more than 4 bonds
Which of the following arrangements of the visible colors of light is in the correct order of increasing energy?
Group of answer choices
red, orange, yellow, green, blue, indigo, violet
violet, indigo, blue, green, yellow, orange, red
red, yellow, orange, green, blue, indigo, violet
violet, indigo, green, blue, yellow, orange, red
Acceleration of an object
Answer:
velocity
Explanation:
The definition of acceleration is: Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
A quantum of light has frequency of 1.8 x 10^14 Hz. Finds its energy.
Its energy : 1.193 x 10⁻¹⁹ J
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
[tex]\tt E=6.626\times 10^{-34}\times 1.8\times 10^{14}\\\\E=1.193\times 10^{-19}~J[/tex]
If D+2 would react with E!, what do you predict to be the formula?
A) OD 2E
B) DE
C) OD2E2
D) O DE 2
Answer:
I think the answers D. Hope this helps you.
Explanation:
What is the concentration, mass/volume percent (m/v), of a solution prepared from 50.0 g NaCl and 2500 mL of water?
answer: 25.0%
Explanation:
thats the answer
Calculate the kilograms of iron that would be produced from 1340 g of calcium carbonate.
Answer:
1.340kg
Explanation:
compare and contrast the alkali metals and the alkaline earth metals
Answer: Answer IS in the explanation.
Explanation: Alkaline Earth metals are group 2 of the periodic tables, whereas alkali metals are in group 2. The major difference between alkaline and Alkali is that Alkaline earth metals have two valence electrons whereas alkali metals have one valence electron.
Answer:
Alkali
Alkaline Earth Metals
Soft metals
Hard metals
One valence electron
Two valence electrons
Form 1+cations
Form 2+cations
More reactive
Less reactive
low melting and boiling point
High(er) melting and boiling point
Group 1
Group 2
Used for group one elements on P.Table
Used for group two elements on P.Table
Lower ionizing energy
High(er) ionizing energy
Explanation: here are the differences
Calculate the Molarity
1) 1.04 M
2) 4.02 M
__________________________________________________________
Explanation:Part 1:We are given:
Number of Moles (n) = 0.65 moles
Volume of Solution (V) = 1.6 L
Solving for the Molarity:
We know that:
Molarity = nV
(where n is the number of moles and V is the volume of the solution in L)
replacing the variables
Molarity = 0.65 * 1.6
Molarity = 1.04 M
Hence, the Molarity is 1.04 M
__________________________________________________________
Part 2:We are given:
Volume of Solution = 825 mL OR 0.825 L
Mass of MgS = 28.7 grams
Number of Moles of MgS:
Number of moles = Given mass / Molar mass
Number of Moles = 28.7 / 56.38 [molar mass of MgS = 56.38 g/mol]
Number of Moles = 0.51 moles
Molarity of the Given solution:
We know that:
Molarity = nV
[where n is the number of moles and V is the volume of the solution in L]
replacing the variables
Molarity = 0.51 * 0.825
Molarity = 0.42 M
Hence, the molarity is 0.42 M
