Answer my question please

Answer My Question Please

Answers

Answer 1

Answer:

Explanation:F


Related Questions

What is the velocity of a wave with a wavelength of 0.03 m and a frequency of
120 Hz?

Answers

Answer:

3.6m/s

Explanation:

v= fλ

v= 120* 0.03

v= 3.6 m/s

v=3.6 m/s



i just took the quiz

The reaction of nitrogen gas and oxygen gas to form nitrogen monoxide gas is shown below. If the measured concentrations of all three chemicals at some point in time are: [N2] = 0.80 M


[O2] = 0.050 M

[NO] = 0.10 M

Which statement is TRUE about the reaction at this point in time? N2(g) + O2(g) ⇄ 2 NO(g) K = 0.10


The reaction is at equilibrium.

The reverse reaction is occurring at a faster rate than the forward reaction.

The forward reaction is occurring at a faster rate than the reverse reaction.

This set of concentration values is impossible because the concentrations of N2 and O2 must be the same.

Answers

Answer:

The reverse reaction is occurring at a faster rate than the forward reaction.

Explanation:

When the reaction:

aA + bB ⇔ cC + dD

has not reached the balance, it is possible to calculate:

[tex]Qc=\frac{[C]^{c}*[D]^{d} }{[A]^{a}*[B]^{b} }[/tex]

where Q is called the reaction quotient, and the concentrations expressed in it are not the equilibrium concentrations, but other concentrations given at a time of the reaction.

Comparing Qc with Kc allows to find out the status and evolution of the system:

If the reaction quotient is equal to the equilibrium constant, Qc = Kc, the system has reached chemical equilibrium. If the reaction quotient is greater than the equilibrium constant, Qc> Kc, the system is not in equilibrium. In this case the direct reaction predominates and there will be more product present than what is obtained at equilibrium. Therefore, this product is used to promote the reverse reaction and reach equilibrium. The system will then evolve to the left to increase the reagent concentration. If the reaction quotient is less than the equilibrium constant, Qc <Kc, the system is not in equilibrium. The concentration of the reagents is higher than it would be at equilibrium, so the direct reaction predominates. Thus, the system will evolve to the right to increase the concentration of products.

In the case of the reaction:

N₂ (g) + O₂ (g) ⇄ 2 NO (g)

[tex]Qc=\frac{[NO]^{2} }{[N_{2} ]*[O_{2} ] }[/tex]

Being:

[N₂] = 0.80 M [O₂] = 0.050 M [NO] = 0.10 M

and replacing:

[tex]Qc=\frac{0.10^{2} }{0.80*0.050 }[/tex]

you get:

Qc= 0.25

Being Kc=0.10, Qc>Kc.  Then the system is not in equilibrium and will evolve to the left to increase the concentration of reagents. So, the reverse reaction is occurring at a faster rate than the forward reaction.

Give examples of partially miscible liquids.

Answers

Answer: Water, alcohols, aldehydes, and ketones.

Explanation:

Answer:

Examples of Partially Miscible and Immiscible Liquids: Illustrations of immiscible liquids are cooking oil and water, milk and oil, gasoline and water, and liquid metals and water. There are as well partially miscible liquids such as honey and water, butanol and water, and potassium chloride and water.

Explanation:

Hope it helps

For this question use the main assumptions of the Kinetic Molecular Theory of gases: 1. Gases are made up of molecules which are relatively far apart. 2. The molecules are in motion at high speeds. 3. The molecular collisions are perfectly elastic. 4. Increase in temperature increases the kinetic energy of the molecules. The idea that no energy is lost when gas molecules hit the walls of a container or each other is explained by 1 2 3 4

Answers

Answer:

Number 3

Explanation:

No energy is lost because collisions are perfectly elastic. Therefore, the answer is number 3.

Which statement is true of a reversible reaction at equilibrium?
А.
The concentration of reactants is less than the concentration of products.
B.
The concentration of reactants and the concentration of products are equal.
с.
The concentration of reactants is greater than the concentration of products.
D.
The concentration of reactants and the concentration of products are constant.
Ε.
The concentration of reactants is decreasing and the concentration of products is increasing,

Answers

Answer:

D.

The concentration of reactants and the concentration of products are constant.

Explanation:

pls mark as brainliest

I believe the answer is D

PLEASE HELP

Which Is a result of topsoil loss A increase soil fertility B poor crop production C soften soil surface D deposition of aggregate

Answers

Answer:

B - Poor crop production

Explanation:

I just did the quiz on Edge 2021

Answer:

b

Explanation:

Esterification is what type of reaction? 1.addition 2.neutralization 3.combustion 4.equilibrium

Answers

Answer:

Equilibrium reaction

Explanation:

What is the Ka of a 0.0796 M solution of nitrous acid (HNO2) with a pH of 2.95?

Answers

Answer:

Coefficient = 1.58

Exponent = - 5

Explanation:

pH = 2.95

Molar concentration = 0.0796M

Ka = [H+]^2 / [HA]

Ka = [H+]^2 / 0.0796

Therefore ;

[H+] = 10^-2.95

[H+] = 0.0011220 = 1.122 × 10^-3

Ka = [H+] / molar concentration

Ka = [1.122 × 10^-3]^2 / 0.0796

Ka = (1.258884 × 10^-6) / 0.0796

Ka = 15.815 × 10^-6

Ka = 1.58 × 10^-5

Coefficient = 1.58

Exponent = - 5

what type of electromagnetic waves does the human eye see as the colors red, blue, or green

Answers

Answer:

Visible light waves

Explanation:

Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength.

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B

How many boxes of A would be required to make 30 grams of C?

Answers

2 boxes of A
Because C=A+B
2 of A = 20 grams
at the other hand we have 2 of B =10
So 20 + 10 = 30 grams

help on this one, i have no idea how to do it​

Answers

Answer:

c

Explanation:

Dinitrogen pentoxide decomposes to form nitrogen dioxide oxygen, following the equation 2N2O3 - 4NO, + 0,. At
a certain timepoint, N2O5 is being consumed at a rate of 0.1 M/s. What's the rate of production of NO, and O, at the
same timepoint?
A. NO, is produced at 0.2 M/s, and O, is produced at 0.05 M/s.
B. NO, is produced at 0.2 M/s, and O, is produced at 0.2 M/s.
C. NO, is produced at 0.05 M/s, and O2 is produced at 0.2 M/s.
D. NO, is produced at 0.1 M/s, and O, is produced at 0.05 M/s.​

Answers

Answer:

A. N₂O₅ is produced at 0.2 mol·L⁻¹s⁻¹, and O₂ is produced at 0.05 mol·L⁻¹s⁻¹.  

Explanation:

2N₂O₅ ⟶ 4NO₂ + O₂

For every two molecules of N₂O₅ that disappear, we get four molecules of NO₂ and one of O₂.

NO₂ is forming twice as fast, and O₂ is forming half as fast, as N₂O₅ is decomposing.

N₂O₅ is decomposing at a rate of 0.1 mol·L⁻¹s⁻¹.

So, N₂O₅ is produced at 0.2 mol·L⁻¹s⁻¹, and O₂ is produced at 0.05 mol·L⁻¹s⁻¹.

 

Answer:

NO2 is produced at 0.2 M/s, and O2 is produced at 0.05 M/s.

Explanation:

What is the complete ionic equation for the reaction between Na 2 SO 4 and CaCl 2 ?

Answers

Answer:

Na2SO4 + CaCl2 → 2Na+ SO4 2- + Ca2+ 2Cl-

Hope this helps.

Answer:

2Na+(aq)+SO42-(aq)+Ca2+(aq)+2Cl-(aq)->CaSO4(s)+2Na+(aq)+2Cl-(aq)

Explanation:

A very good example of soft water is A. Distilled water B. Sea water C. Underground water D. Polluted water

Answers

I think the answer is A

Answer:

The answer is option A.

Distilled water

Since all the chemicals that will cause hardness in the water has been removed.

Hope this helps.

Which compound contains covalent bonds? AlN Ca3N2 NaCl HCl

Answers

Answer:

Ca3N2

Explanation:

Which refers to a measure of how acidic or basic a solution is? pH solubility reactiveness hardness

Answers

Answer:

it is Ph of solution that tells you the acdic and basic nature of solution

if PH is lower than 7 the soution is acidic and if PH is larger than 7  the solution is basic

Explanation:

Answer:

A. Ph

Explanation:

Consider the intermediate chemical reactions. 2 equations. First: upper C a (s) plus upper C upper O subscript 2 (g) plus one half upper O subscript 2 (g) right arrow upper C a upper C upper O subscript 3 (s). Delta H 1 equals negative 812.8 kilojoules. Second: 2 upper C a (s) plus upper O subscript 2 (g) right arrow 2 upper C a upper O (s). Delta H 2 equals negative 1, 269 kilojoules. The final overall chemical equation is Upper Ca upper O (s) plus upper C upper O subscript 2 (g) right arrow upper C a upper C upper O subscript 3 (s).. When the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed. is halved. has its sign changed. is unchanged.

Answers

Answer: When the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed.

Explanation:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The overall chemical reaction follows:

[tex]CaO(s)+CO_2\rightarrow CaCO_3(s)[/tex]     [tex]\Delta H^o_{rxn}=?[/tex]

The intermediate balanced chemical reaction are:

(1) [tex]Ca(s)+CO_2(g)+\frac{1}{2}O_2(g)\rightarrow CaCO_3(s)[/tex]    [tex]\Delta H_1=-812.8kJ[/tex]  

(2) [tex]2Ca(s)+O_2(g)\rightarrow 2CaO(s)[/tex]     [tex]\Delta H_2=-1269kJ[/tex]

The expression for enthalpy of the reaction follows:

[tex]\Delta H^o_{rxn}=[1\times (\Delta H_1)]+[\frac{1}{2}\times (-\Delta H_2)][/tex]

Hence, when the enthalpy of this overall chemical equation is calculated, the enthalpy of the second intermediate equation is halved and has its sign changed.

Answer:

A. is halved and has its sign changed.

Explanation:

just took the test on edge

what is the other metal react iron which get rusted​

Answers

Answer:

The answer is OXIDATION REACTION.

Answer:

There's no other metal.

Explanation:

Iron reacts only with water and air to get the object rusted. There is no other metal which reacts with iron to get the object rusted.

However,

Zinc can be used to protect Metal from Rusting.

I need an answer,
Chemistry "question":
Name this molecule.

Answers

Answer:

3–methylhexane.

Explanation:

To effectively name the compound given in the question, do the following:

1. Locate the longest continuous carbon chain. This gives the parent name of the compound.

2. Identify the substituent attached to the compound.

3. Locate the position of substituent in the compound using the lowest possible count.

4. Combine the above to get the name of the compound.

Now, let us name the compound with the illustration given above.

1. The longest continuous carbon chain is carbon 6 i.e Hexane

2. The substituent attached to compound is methyl i.e CH3.

3. The substituent i.e CH3 is located at carbon 3.

4. We shall combine the above to get the name of the compound. Therefore, the name of the compound is:

3–methylhexane.

write the steps you would use for making tea.use the words solution,solvent,solute,dissolve,soluble,insoluble,filtrate and residue ​

Answers

1. Take 100ml of water as solvent and boil it few minutes.
2. Now add one tea spoon sugar, one tea spoon tea leaves and 50ml of milk. Here sugar, tea leaves and milk are solute.
3. Now boil it again for few minutes so that sugar will dissolves in solution as sugar is soluble in water
4. Now filter the solution. Collect the filtrate in cup. The insoluble tea leaves will be left behind as residue.

synthetic fibres catch fire easily so they are_____​

Answers

Answer:

artificial polymer fibers that melt upon heating

Explanation:

How many moles of \ce{H2O}HX 2 ​ O will be produced from 42.0 \text{ g}42.0 g42, point, 0, start text, space, g, end text of \ce{H2O2}HX 2 ​ OX 2 ​ ?

Answers

Answer:

1.272 moles are contained in 42 grams of water.

Explanation:

Chemically speaking, ice is the solid form of water and a molecule of water consist of two atoms of hydrogen and an atom of oxygen. Furthermore, atomic masses of hydrogen and oxygen are [tex]1.008\,\frac{g}{mol}[/tex] and [tex]15.999\,\frac{g}{mol}[/tex], respectively. A mole is the ratio of current mass of water to molecular weight of water, the latter one is now calculated before computing the amount of moles of water:

[tex]M = 1.008\,\frac{g}{mol} + 2\cdot \left(15.999\,\frac{g}{mol} \right)[/tex]

[tex]M = 33.006\,\frac{g}{mol}[/tex]

Finally, the amount of moles contained in 42 grams of ice is:

[tex]n = \frac{m}{M}[/tex]

[tex]n = \frac{42\,g}{33.006\,\frac{g}{mol} }[/tex]

[tex]n = 1.272\,mol[/tex]

1.272 moles are contained in 42 grams of water.

the___is the middle layer of earths atmosphere

Answers

Answer:

mesosphere

Explanation:

Which describes gneiss?

igneous
formed from shells
tends to split along bands
grains randomly arranged

Answers

Answer:

tends to split along bands

Explanation:

Answer: C

Explanation: E2022

Name the first 20 elements of the pereodic table

Answers

Answer:

alkali metals hydrogen lithium sodium potassium rubidium cesium francium alkaline earth metals beryllium magnesium calcium strontium barium radium group 3 boron aluminium gallium indium thalium carbon family carbon silicon germanium tin lead

Explanation:

i hope this will help you :)

There's Hydrogen and Helium

Then Lithium, Beryllium

Boron, Carbon everywhere

Nitrogen all through the air

With Oxygen so you can breathe

And Fluorine for your pretty teeth

Neon to light up the signs

Sodium for salty times

Silicon

(Phosphorus, then Sulfur) Chlorine and Argon

(Potassium) And Calcium so you'll grow strong

(Scandium) Titanium, Vanadium and Chromium and Manganese

This is the Periodic Table

Noble gas is stable

Halogens and Alkali react aggressively

Each period will see new outer shells

While electrons are added moving to the right

Iron is the 26th

Then Cobalt, Nickel coins you get

Copper, Zinc and Gallium

Germanium and Arsenic

Selenium and Bromine film

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out?
25°C
2 atm
Pt

Answers

Answer:

2 atm

Explanation:

Different symbols have different meanings in chemistry. For example, the symbol Δ = adding energy to the reactants.

To identify whether the reactants combine with a specific pressure, we have to use the symbol atm, in such a case 2 atm.

Hope that helps!

Power is measured in which unit?

Answers

Answer:

joules or watts

Explanation:

Answer:

the answer is B: watts

Explanation:

edge

Which of the following has the shortest bond lenght Options A). H2 B).N2 C).O2 D).F2

Answers

Answer:

B. N2

Explanation:

The triple bonds pull the atoms closer together, and since N2 is the only molecule with the triple bond, it is the shortest bond length.

Determine the genotypes of offspring 1-8.

Answers

Do you have a picture

Mass is measured against a standard using a

Answers

Answer:

balance

Explanation:

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