Draw the Lewis structure (including resonance structures) for methyl azide (CH3N3). For each resonance structure, assign formal charges to all atoms that have formal charge. Draw the Lewis structure (including resonance structures) for methyl azide (CH3N3). For each resonance structure, assign formal charges to all atoms that have formal charge.

Answer:

D

Explanation:

2H202 = 2H2O + O2

The amount, in grams, of water that can be made when 12.1 moles of [tex]HNO_3[/tex] are consumed would be 72.54 grams.

From the balanced equation of the reaction, the mole ratio of [tex]HNO_3[/tex] to water is 3:1.

This means that for every 3 moles of [tex]HNO_3[/tex], 1 mole of water will be produced.

3 mole [tex]HNO_3[/tex] = 1 mole water

12.1 moles HNO3 = 12.1x1/3

                             = 4.03 mol

Recall that: mass = mole x molar mass

The molar mass of water is 18 g/mol

Thus, the mass of 4.03 mol of water = 4.03 x 18 = 72.54 grams

In other words, going by the equation of the reaction, the mass of water that can be made when 12.1 moles of [tex]HNO_3[/tex] are consumed would be 72.54 grams.

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Answer:

The entropy change for a real, irreversible process is equal to zero.

The correct option is 'c'.

Explanation:

Lets look around all the given options -:

(a)  the entropy change for a theoretical reversible process with the same initial and final states , since the entropy change is equal and opposite in reversible process , thus this option in not correct.

(b) equal to the entropy change for the same process performed reversibly ONLY if the process can be reversed at all. Since , the change is same as well as opposite too . Therefore , this statement is also not true .

(c) zero. This option is true because We generate more entropy in an irreversible process. Because no heat moves into or out of the surroundings during the procedure, the entropy change of the surroundings is zero.

(d) impossible to tell. This option is invalid , thus incorrect .

Hence , the correct option is 'c' that is zero.

Answer: the entropy change for a theoretical reversible process with the same initial and final states

Answer:

A? or maybe C?

Explanation:

Hot is heat... right? so is warm.. Am i missing something?

Answer:

The answer is D

Explanation:

I got it correct on the quiz.

Answer:

a) 2.29E4

Explanation: 1kg = 1000g. to get mass in grams multiply 22.9 kg by 1000g then divide by 1 kg to cancel the kg.

b)  2,29E5 g

c) 2.29 E10 μg

Answer:

WHAT DIAGRAM THX FOR POINTS THO

Explanation:

Answer:

462.5ml

Explanation:

Using Charle's law equation;

V1/T1 = V2/T2

Where;

V1 = initial volume (ml)

V2 = final volume (ml)

T1 = initial temperature (K)

T2 = final temperature (K)

Based on the information provided in this question;

V1 = 616ml = 616/1000 = 0.616L

V2 = ?

T1 = 68°C = 68 + 273 = 341K

T2 = 17 °C = -17 + 273 = 256K

V1/T1 = V2/T2

0.616/341 = V2/256

Cross multiply

341 × V2 = 256 × 0.616

341V2 = 157.69

V2 = 157.69/341

V2 = 0.4625 L or 462.5ml

Answer:

entire, increasing, decreasing

Explanation:

The EM Spectrum is the entire range of EM waves in order of increasing frequency and decreasing wavelength.

Answer:

Clastic or detrital sedimentary rocks are made from pieces of bedrock, sediment, derived primarily by mechanical weathering.

Explanation:

There is a golden rule of solubility, non polar solute dissolve in non polar solvent and polar solute dissolve in polar solvent. Therefore, the correct option is option B.

Solution is a homogeneous mixture of two or more than two substances. A solution is a homogeneous mixture of solute and solvent molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.

There are two types of mixture that is homogeneous and heterogeneous. Solution is a homogeneous solution. The nature of solvent tells about whether the solvent is in liquid, solid or gas form.

Let amount of 30% to mix, be X

Then amount of 18% to mix = 300 - X

0.3X + 0.18(300 - X) = 0.21(300)

0.3X+ 0.18(300) - 0.18X= 0.21(300)

0.3X - 0.18X =0 .21(300) -0 .18(300)

0.12X =0 .03(300)

X=75L

Therefore, the correct option is option B.

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Answer:

pH of the base solution after the chemist has added 213.6 mL of the HNO3 solution to it is 9.96

Explanation:

Calculating the moles of dimethylamine  

Moles of dimethylamine  = molairty * volume in L = 0.63*0.0992   = 0.0625moles

Moles of HNO3               = molarity * volume in L = 0.25*0.2136    = 0.0534 moles

The balanced chemical equation is

(CH3)2NH + HNO3 -------------------> (CH3)2NH2^+    +   NO3^-

I                  0.0625         0.0534                               0                  

C                 -0.0534       - 0.0534                              0.0534

E               0.0091               0                                   0.0534

As we know ,  

POH   = Pkb + log[(CH3)2NH2^+]/[(CH3)2NH]

= 3.27 + log0.0534/0.0091                                  

= 3.27+ 0.768

= 4.038                  

PH      = 14-POH

= 14-4.038   = 9.96  

Answer:

1. Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. During cell division, mitosis refers specifically to the separation of the duplicated genetic material carried in the nucleus.

2. Today, mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.

3. Prophase. The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles of the cell.

4. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. The sister chromatids are pairs of identical copies of DNA joined at a point called the centromere.

5. During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.

6. During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle. The separated chromosomes are then pulled by the spindle to opposite poles of the cell.

7. Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

8. Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells sperm in males, eggs in females. During meiosis one cell? divides twice to form four daughter cells.

9. Only sexually reproductive organisms utilize meiosis. Both sexual and asexual organisms go through the process of mitosis. It happens in the cells of the body known as the somatic cells and produces cells related to growth and repair.

10. Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.

Explanation:

heart me pls

Answer:

Longest

Explanation:

The visible light spectrum goes from red color to blue color:

As it has the longest wavelength, it can travel further than other wavelengths, which is why the moon appears red during a lunar eclipse.

Answer:

The Less accuracy of this method is the reason for this balance affecting the number of significant digits to which the experimental molecular weight of carbon dioxide can be reported.

Explanation:

As we know the triple-beam-balance method is a less accurate method of measurement of mass.

An accurate molecular weight is not required in this case. So, this method is being used because much accuracy is not required.

That is why this balance affects the number of significant digits to which the experimental molecular weight of carbon dioxide can be reported.

Answer:

D. 0.160

Explanation:

The solution A is obtained adding 2.0mL of a solution of bromocresol green, 5.0mL of 1.60M HAc and 2.0mL of a solution of KCl. The solution is diluted to 50mL

That means the HAc is diluted from 5.0mL to 50.0mL, that is:

50.0mL / 5.0mL = 10 times.

And the final concentration of HAc must be:

1.60M / 10 times =

0.160M

Right answer is:

Answer:

A. NO₃⁻ ⇒ +5

B. NO₄⁺ ⇒ +9

C. N₂ ⇒ 0

D. NH₂OH ⇒ -1

E. NO₂⁻ ⇒ +3

Explanation:

To calculate the oxidation number of an element in a compound, we have to know the oxidation number of the other elements. Then, we have to consider that the sum of the oxidation number of each atom multiplied by the subscripts is equal to the net charge of the compound.

A. NO₃⁻

This is the ion nitrate. Oxygen atoms (O) has an oxidation number of -2 because it derives from an oxide. In this case, the net charge of the ion is -1. Thus, we calculate the oxidation number of N as follows:

N + (3 x (-2)) = -1

N - 6 = -1 ⇒ N= -1 + 6 = +5

B. NO₄⁺

In this case, the sum of the oxidation numbers of O and N multiplied by the subscripts is equal to +1:

N + (4 x (-2)) = +1

N - 8 = +1 ⇒ N = +1 +8 = +9

C. N₂

The oxidation number of N is 0 because N₂ is an elemental substance.

D. NH₂OH

The oxidation number of H is +1 and -2 for O. The net charge of the molecule is 0.

N + (H x 3) + (O) = 0

N + (+1 x 3) + (-2) = 0

N + 3 -2 = 0 ⇒ N = 2 - 3 = -1

E. NO₂⁻

The net charge of the ion nitrite is -1.

N + (2 x O) = -1

N + (2 x (-2)) = -1 ⇒ N = -1 + 4 = +3

Therefore:

Highest oxidation number = B. NO₄⁺ (+9)

Lowest oxidation number = D. NH₂OH (-1)

Answer:

c?

Explanation:

Answer:

b

Explanation:

Answer:

Explanation:

iuhyesfdxgrygtvd ctrfdrdt6r76_jjdvrud83447+je8867vbde turn left  then go right back then stop   done

The oxidation number of the atoms in the given compounds are :

K₂O: K = + 1; O = -2;

PO₃⁻³: P = +3; O = -2

NH₃: N = -3; H = +1

Cu(NO₃)₂: Cu = +2; N = +5; O = -2

NO₃⁻¹: N = +5;  O = -2

CO₂: C = +4; O = -2

KClO₃: K = +1; Cl = + 5; O = -2

O₂: O = 0

Ca(ClO₄)₂: Ca = +2; Cl = +7; O = -2

The number of electrons an atom or ion has either gained or lost in comparison to the neutral atom is known as the oxidation number or state of the atom or ion.

Group I, 2, and 3 electropositive metal atoms lose a certain number of electrons, and their positive oxidation numbers remain constant.

The oxidation number of the atoms in the given compounds are as follows:

K₂0

K = + 1

O = -2

Sum is (+1 * 2) + (-2) = 0

PO₃⁻³

P = + 3

O = -2

Sum is (+3) + (-2 * 3) = -3

NH₃

N = -3

H = +1

Sum is (-3) + (+1 * 3) = 0

Cu(NO₃)₂

Cu = +2

N = +5

O = -2

Sum is (+2) + (+5 * 2) + (-2 * 6) = 0

NO₃⁻¹

N = +5

O = -2

Sum is (+5) + (-2 * 3) = -1

CO₂

C = +4

O = -2

Sum is (+4) + (-2 * 2) = 0

KClO₃

K = +1

Cl = + 5

O = -2

Sum is (+1) + (5) + (-2 * 3) = 0

O₂

O = 0

Sum is (0 * 2) = 0

Ca(ClO₄)₂

Ca = +2

Cl = +7

O = -2

Sum is (+2) + (+7 * 2) + (-2 * 8) = 0

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When applying heat the solid will eventually reach its melting point. Its then that the solid will slowly start to turn into a liquid due to the heat transfer. The process will only continue with even more heat piling up causing it to evaporate and become a gas.

Heat transfer comes in different ways depending on the solid:

either-

| | |

conduction

convection

or

radiation

- - - - -

this is all I know for now.

-------------------------------------------

Lucky me! We actually learned this in class today

I hope I helped in some way! :)

Answer:

–6562.816 J

Explanation:

From the question given above, the following data were obtained:

Msss (M) = 256 g

Initial temperature (T₁) = 96 °C

Final temperature (T₂) = 28 °C

Heat (Q) released =?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T₁) = 96 °C

Final temperature (T₂) = 28 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 28 – 96

ΔT = –68 °C

Finally, we shall determine the heat released. This can be obtained as follow:

Msss (M) = 256 g

Change in temperature (ΔT) = –68 °C

Specific heat capacity (C) of Zn = 0.377 J/gºC

Heat (Q) released =?

Q = MCΔT

Q = 256 × 0.377 × –68

Q = –6562.816 J

Thus, –6562.816 J of heat energy is released.

Answer: this looks hard

Explanation:

Answer:

1 Na2S  + 2 HCl  ===>   2 NaCl  + 1 H2S

In these reactions, two compounds exchange ions to form two new compounds.

Explanation:

--- Na2S + ---- HCl ===> ---- NaCl  + ---- H2S

Na  =  2                                  Na = 1 * 2 = 2

S  = 1                                       S = 1

H = 1 * 2 = 2                             H = 2

Cl = 1 * 2 = 2                            Cl = 1 * 2 = Cl

In these reactions, two compounds exchange ions to form two new compounds.

REACTION TYPE:

DOUBLE DISPLACEMENT REACTION/DOUBLE REPLACEMENT

I hope that helps, have a wonderful day!!!!

All the EM waves travel at the same speed. The equation for speed is frequency (v) times the wavelength (λ). Speed of light equals 300000 km/s. Hence one number goes to 3 × 10⁸ m and other number is 1 s⁻¹.

Electromagnetic waves are waves moving without a medium through vacuum. They are accompanied with an electric field and magnetic field. The speed of an electromagnetic wave is the product its wavelength and frequency.

c = νλ

Therefore, the given passage can be filled as follows:

All the EM waves travel at the same speed. The equation for speed is frequency (v) times the wavelength (λ). Speed of light equals 300000 km/s. Hence one number goes to 3 × 10⁸ m and other number is 1 s⁻¹.

All EM waves are energetic.  The higher the frequency the more energy in the wave.

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Answer:

The answer is C

Explanation:

Duh its the name HALF LIFE!!

just a way to remember

The statement which is true about the half-life of a source is (D) It is half the time it takes the activity of the source to decrease to zero. Hence the correct option is (D)

Half-life is the length of time it takes for a radioactive element to decay to half of its initial value.

This suggests that a source's activity has a half-life when it takes time for it to decrease to half its initial value.

It is the amount of time needed for half of the atomic nuclei in a radioactive sample to spontaneously decay, which releases energy and particles into other nuclear species. Alternatively, it is the amount of time needed for the radioactive sample to disintegrate at a rate of one per second.

Therefore, The statement which is true about the half-life of a source is (D) It is half the time it takes the activity of the source to decrease to zero. Hence the correct option is (D)

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Answer:

The chemical change is "Frying an egg".

Explanation:

Thus the above is the right answer.

Answer:

Because fresh water flowing into the estuary is less salty and less dense than water from the ocean, it often floats on top of the heavier seawater. ... For example, a heavy spring rain, or a sustained shift in local winds, can drastically affect the salinity in different parts of an estuary.

Answer:

Answer:

la respuesta es la letra a