what is the percentage of nitrogen in the fertilizer urea ((nh2) 2co)

Answer:

Animals breathe by absorbing oxygen gas from the atmosphere and releasing carbon dioxide gas back into the atmosphere from their bodies during the process. This carbon dioxide is released by the animal's cells as a waste product during cellular respiration.

Explanation:

Answer:0.085

Explanation:

Answer:

ionic bond is the type of bond formed from electrostatic attraction between oppositely charged ion in a chemical compound

The correct answer is (A) colorless solution and a white precipitate.

When aqueous HCl and Na2SO3 are mixed, a chemical reaction takes place. The HCl reacts with the Na2SO3 to form sodium hydrogen sulfite (NaHSO3) and hydrogen chloride gas (HCl). The balanced chemical equation for this reaction is:

2 HCl (aq) + Na2SO3 (aq) → 2 NaHSO3 (aq) + H2(g)

The white precipitate that forms is NaHSO3, which is insoluble in water. The colorless solution is the remaining aqueous solution of NaCl and NaHSO3. Gas evolution is also observed, as HCl reacts with Na2SO3 to form H2 gas.

It's important to note that no prescription is needed for these chemicals, but they should still be handled with care and appropriate safety precautions should be taken.

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Answer:

E دی کر دیکھ زور شکر 75 سلام والے آج داد ہی auditory آپ لالچ زچ فنڈنگ ایف دن

Answer:

Mass is an extensive physical property, it depends on the amount of matter being measured. It is physical because it can be measured without changing a substance's chemical identity.

Wascana Chemicals should use emissions reduction technologies to reduce the amount of sulphur dioxide emitted during paint production.

To comply with the Ministry of Environment's directive, Wascana Chemicals, a paint manufacturer, needs to reduce the amount of sulphur dioxide released during paint production. This can be accomplished through the use of emissions reduction technology, such as scrubbers, catalytic converters, or gasification systems.Scrubbers are devices that use a wet process to remove pollutants from gas streams. The gas stream is forced through a scrubbing solution that traps pollutants, including sulphur dioxide.Catalytic converters, on the other hand, use a chemical process to transform pollutants into less harmful substances. Gasification systems convert solid or liquid materials into a gas, which can be combusted to generate energy.

In conclusion, to comply with the Ministry of Environment's emissions reduction regulations, Wascana Chemicals should consider implementing one or more emissions reduction technologies such as scrubbers, catalytic converters, or gasification systems to reduce the amount of sulphur dioxide emitted during paint production.

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Answer:

[Ar]\(4s^{2}3d^{7}\)

Explanation:

To write abbreviated electron configurations, begin with the element of interest and work your way down in atomic numbers to the next smallest noble gas.

Write the noble gas symbol in [brackets] and then write the electron configuration as you would normally.

I hope this helps you

:)

Answer:

C producers

Explanation:

All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.

Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons. the covalent compounds have very low melting point and boiling point.

The covalent bond form between the atoms by the sharing of electron. when there is no much difference in electronegativity of the atoms then the electrons are equally shared between two atoms. the mutual sharing of electrons formed covalent bond . the compound is called as covalent compound or molecules.  the molecules held by very weak intermolecular forces and it is very easy to break them . so, they have low melting point and boiling point.

Thus, Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons .the covalent compounds have very low melting point and boiling point.

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Answer:

What can be said about these common forms of sulphur is that;

(B) They will exhibit same chemical properties

Explanation:

Allotropy is the property of an element to exist in two or more forms in the same physical state

Allotropes have several similar chemical  properties but differ in their physical properties, such as the white, pale yellow to totally colorless diamond and the gray graphite

Sulphur can exist in several allotropic forms, and carbon is the only element that has more allotropes than sulphur

The sulphur allotropes includes S₂, S₆, and S₅ have similar chemical properties but different physical properties.

The correct option is;

What can be said about these common forms of sulphur is that they have the same chemical properties

Answer:

it is option A

Explanation: nitrification, is the process by which bacteria in the soil convert ammonia to nitrites and nitrates. Ammonia (NH3) was produced by nitrogen fixation, but plants prefer nitrites and nitrates as a source of nitrogen and oxygen.

hope it helps

The number of moles of the cyclopropane that remains after 1.00 s is  6.1 * 10^-4 M.

By the use of the equation of the first order reaction, we can be able to find out the concentration at a given time.

The equation of the first order reaction can be written as;

ln[A] = ln[Ao] - kt

[A] = Concentration at time t

[Ao] = Initial concentration

k = rate constant

t = time

Then;

[A] = e^ln[Ao] - kt

[A] = e^ln6.00 - (9.2 * 1)

[A] = 6.1 * 10^-4 M

The amount of the cyclopropane left is  6.1 * 10^-4 M.

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Based on the periodic table, the element that is most reactive is Na.

The correct option is A.

Reactivity is a gauge of an element's propensity to create compounds with other elements. While certain elements require energy to react and are inert, others will do so simply and spontaneously. Reactivity is a gauge of an element's propensity to create compounds with other elements.

Reactive elements are the Group 1 and Group 2 metals. Also, the Group 17 and Group 16 non-metals are reactive non-metals.

Group 1 and Group 2 metals form positive ions easily by electron loss. Group 17 and Group 16 non-metals form negative ions by electron gain.

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Coal is abundant and cost-effective, providing stable energy.

Coal extraction damages the environment, and burning it releases high levels of CO2 and air pollutants. Oil has high energy density and infrastructure, but its combustion contributes to climate change and spills cause environmental harm.

Natural gas emits less CO2, is versatile, and is abundant, but extraction techniques like fracking can harm ecosystems and water resources. Nuclear power produces large amounts of electricity without CO2 emissions but faces concerns about radioactive waste disposal and safety risks. Biomass is renewable but competes with food production and can release emissions.

Wind, solar, hydro, and geothermal offer renewable sources, but their scalability, intermittency, and land use impacts vary. Per capita, consumption affects the magnitude of their environmental effects.

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Answer:

Earthquake...

Explanation:

I mean, its kinda the only one that makes sense aha

And took test!

The word earthquake identifies the shaking that results from movement under Earth's surface.

Hence, option 1 is the answer.

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Answers

Explanations

Answer:

We could plant more trees :)

Explanation:

Trees producer oxygen AND absorb carbon dioxide, something our earth has too much of, thanks to humans

Answer:

just replace the 9 mole with 3.68 g of Al .

I think it will help you.

The evidence from the text that best supports the theme the oppressed live unsatisfying lives includes: "I simply transferred from papa's hands into yours.", "I have been existed merely to perform tricks for you.", "It's your fault that I made nothing of my life." Option, A, C, and D is correct.

These quotes all suggest a sense of powerlessness and dissatisfaction with one's circumstances, which are common experiences of those who are oppressed. The first quote implies a lack of agency or control over one's life, while the second quote suggests a lack of autonomy or independence.

The third quote places blame on an external force, which is a common coping mechanism for individuals who feel trapped in their circumstances.

The other two quotes ("I had been living here like a poor woman" and "How unreasonable and how ungrateful you are") do not directly relate to the theme of oppressed individuals living unsatisfying lives.

Hence, A. C. D. is the correct option.

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--The given question is incorrect, the correct question is

"What evidence from the text best supports the theme that the oppressed live unsatisfying lives? check all that apply. A) I was simply transferred from papa's hands into yours. B) I had been living here like a poor woman. C) I have existed merely to perform tricks for you. D) It is your fault that i have made nothing of my life. E) how unreasonable and how ungrateful you are. "--

Answer:

105m

Explanation:

u=20m/s

g=10m/s^2

t=3s

s=ut+1/2gt^2at

s=20*3+1/2*10*3*3

s=105m

Answer:

the amount of neutrons would be the difference in the three isotopes

The evidence that indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier: Whole logs mixed in with the rocks, Clay-sized particles and An abundance of snow and ice

The following evidence indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier:

Whole logs mixed in with the rocks: The presence of whole logs mixed in with the rocks suggests a rapid and powerful flow, characteristic of a lahar, rather than the slow movement associated with glaciers.

Clay-sized particles: The presence of clay-sized particles is often associated with lahars, as they can be easily transported by the flowing volcanic material.

An abundance of snow and ice: The presence of snow and ice is indicative of a recent event, as glaciers tend to accumulate and retain snow and ice over time. In the case of a lahar, the presence of snow and ice suggests a more recent deposition.

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To solve this problem, let's use the definition for molarity:

Replacing the values of the problem:

Now, to find the mass, we multiply by the molecular weight of NaCl. (Which is about 58.44g/mol)

The answer is approximately 22.2g of NaCl

Answer:

There are three products;carbon(IV)oxide,water and dinitogen and the number of molecules are given

a)  The impulse response is

u(t) - 2u(t-1) + u(t-2)

This is a causal system as it depends only on the present and past input values.

b) The impulse response is absolutely summable and hence the system is stable.

c) The system responses are

y1(t) = 2δ(t) - δ(t-2) - 2δ(t+2)

y2(t) = δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)

Given, the impulse responses of two LTI systems are as follows:

h1(t) = u(t+1) - u(t-3)

and

h2(t) = u(t) - 2u(t-1) + u(t-2)

(a) Causal systems are those which have their output dependent only on the present and past input values.

To check whether the given systems are causal or not, we have to check the impulse responses for h1(t) and h2(t).

For h1(t), the impulse response isu(t+1) - u(t-3)

It is not causal as the output for t < -1 will depend on the future input values.

For h2(t), the impulse response is

u(t) - 2u(t-1) + u(t-2)

This is a causal system as it depends only on the present and past input values.

(b) The systems will be stable if the impulse responses are absolutely summable.

For

h1(t),|h1(t)| = |u(t+1) - u(t-3)|
= 1 for t = 2, 3, ..., 4
= 0 elsewhere

∴ The impulse response is absolutely summable and hence the system is stable.

For h2(t)

|h2(t)| = |u(t) - 2u(t-1) + u(t-2)| = 1

for t = 2, 3
= 0 elsewhere

∴ The impulse response is absolutely summable and hence the system is stable.

(c) The response of the system to the input

x(t) = δ(t-1) - 2δ(t+1)

will be given by

y(t) = x(t) * h(t)

where, h(t) is the impulse response of the system

For h1(t), the impulse response is

h1(t) = u(t+1) - u(t-3)

Therefore,

y1(t) = x(t) * h1(t)

= (δ(t-1) - 2δ(t+1)) * (u(t+1) - u(t-3))
= δ(t) - δ(t-2) - 2δ(t+2) + 2δ(t)
= 2δ(t) - δ(t-2) - 2δ(t+2)

For h2(t), the impulse response is

h2(t) = u(t) - 2u(t-1) + u(t-2)

Therefore,

y2(t) = x(t) * h2(t)

= (δ(t-1) - 2δ(t+1)) * (u(t) - 2u(t-1) + u(t-2))
= δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)

The plots of the system responses are as follows:

Therefore, the system responses are

y1(t) = 2δ(t) - δ(t-2) - 2δ(t+2)

y2(t) = δ(t-1) - 2δ(t) + δ(t-2) - 2δ(t+1) + 4δ(t+2) - 2δ(t+3)

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The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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