Use the bond energy to calculate an approximate value of ΔH for the following reaction. Which is the more stable form of FNO2?

Answer:

40 kcal

Explanation:

Heat required to melt

1 g

of ice at

0°C

is approximately

80 cal

. This is also called latent heat of fusion of ice.

For

500 g

of ice

Q

=

500

g

×

80

cal

g

=

40000 cal = 40 kcal

Given the Planck's constant and the speed of light, the energy of the ultraviolet light with a frequency of 9.58×10¹⁴ Hz is 6.35×10¯¹⁹ J (Option C)

The energy of the ultraviolet light can be obtained as follow:

E = hf

E = 6.626×10¯³⁴ × 9.58×10¹⁴

E = 6.35×10¯¹⁹ J

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Answer:

liquid is heated. As the liquid is heated, the molecules within it gain the energy to escape the liquid phase and transition into the gas phase in the form of bubbles.

Explanation:

The minimum number of grams of I that must be present is ; 0.01836 * 10⁻³ mol

Given data :

Volume of solution to be tested for I-ion = 10 mL

Volume of  Pb(NO₃)₂ = 0.2 mL

molarity of Pb(NO₃)₂ = 0.13 M

First step : calculate conc of PB²⁺ ions in the solution

conc of PB²⁺ ions =  ( molarity of Pb(NO₃)₂ * volume of  Pb(NO₃)₂ ) / ( total volume )

                              = ( 0.13 * 0.2 ) / ( 10 + 0.2 )

                              = ( 0.026 ) / ( 10.2 )  = 0.002549 M

Next step : determine the molarity of  I

using the dissociation reaction of PbI₂

PbI₂(s) ---> Pb²⁺ (aq)  + 2I (aq)

also;  Ksp = [ Pb²⁺ ] [ I ]²  ---- ( 1 )

From the question the given value of Ksp = 8.49 * 10⁻⁹

Therefore equation ( 1 ) becomes

8.49 * 10⁻⁹ = ( 0.002549 ) * [ I ]²

[ I ] = √ ( 8.49 * 10⁻⁹ ) / ( 0.002549 )

      = 0.0018 M

Final step : Determine the minimum number of grams of I

moles of I = molarity of I * total volume

                 = 0.0018 M * 10.2 mL

                 = 0.01836 * 10⁻³ mol

Hence we can conclude that The minimum number of grams of I that must be present is ; 0.01836 * 10⁻³ mol

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Explanation:

0.9 grams of oxygen gas we need.

Answer:

C. Refining

Explanation:

Refining process removes elements from a substance

Answer: The gas generated by two antacid tablets has a smaller volume.

Explanation:

Since the antiacid is the limiting reagent, we know that the more tablets there are, the more gas there will be.

This means that there will be more gas generated by the four antiacid tablets when compared to the two antiacid tablets, which gives us that the gas generated by the two antiacid tablets has a smaller volume.

Answer:

Trachea is not the part of digestive system

Explanation:

Trachea is the part of the respiratory system

Answer:

A mol (approximately)represents the number 6.02 X 10^^23. Mols become useful when we learn that, for any element on the periodic table, 6.02 X 10^^23 atoms of that element have a mass equal to the atomic mass in grams. So, on the periodic table carbon has an atomic mass of 12.011. That means: 12.011 grams of carbon is made up of 6.02 X 10^^23 atoms.

The above question is tricky.

If the question considers 1 molecule of SO2 as a particle, then the answer is 1.80 * 6.02 X 10^^23

If the question considers the S as one particle, and the O2 as 2 more particles, then the answer is: 3 * 1.8 * 6.02 X 10^^23.

Explanation:

hope it helps U

Answer:

water has a high specific heat

Explanation:

this should work as an answer

Answer:

Explanation:

Calculate the pH of a hydrochloride acid solution, HCl, whose hydronium ion (H3O)+ concentration is 8.29 X 10-4 M.

Note: answer should have three significant figures

Answer:

water has several important physical properties. Most of the physical properties of water are quite atypical e.g molar mass is 18.0151grams per mol and melting point is 0.00 degree

Taking into account the Brønsted-Lowry acid-base theory, HPO₄⁻² is conjugate base of H₂PO₄⁻.

The Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.

According to this theory, acids are proton donors while bases are proton acceptors.

So, reactions between acids and bases are H⁺ proton transfer reactions, causing the acid to form its conjugate base and the base to form its conjugated acid by exchanging a proton.

In other words, a conjugate base is an ion or molecule resulting from the acid that loses the proton, while a conjugate acid is an ion or molecule resulting from the base that gains the proton:

acid + base ⇄ conjugate base + conjugate acid

In this case, you know:

H₂PO₄⁻ + NH₃ → HPO₄⁻² + NH₄⁺

H₂PO₄⁻ behaves like acid because donates an H⁺ proton while NH₃ behaves like base because accepts an H⁺ proton from the acid.

So, NH₄⁺ is the conjugate acid of the NH₃ and HPO₄⁻² is conjugate base of H₂PO₄⁻.

In summary, HPO₄⁻² is conjugate base of H₂PO₄⁻.

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Hey there!

January = 31 ☑️

February = 28 (sometimes 29 on a leap year) ☑️

March = 31 ☑️

April = 30 ☑️

May = 31 ☑️

June = 30 ☑️

July = 31 ☑️

August = 31 ☑️

September = 30 ☑️

October = 31 ☑️

November = 30 ☑️
December = 31 ☑️

Therefore, your answer is: 365

[Below is how to find out and what your answer to this given question]

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

Answer:Tep/Shel/

Explanation:

Answer:

it's food and procipitation

Explanation:

Answer:

To what temperature must a sample of helium gas be cooled from 22.2 degrees C to reduce its volume from 1.00L to 100cm3 ?

Explanation:

Answer:

energy of motion is kinetic

energy of Bond between atom chemical energy

stored energy based on position or arrangement-potential

the sum of an object's kinetic and potential energies----mechinical

Considering the definition of volume percentage, the mass/volume percent in this solution is 26.5%.

Mass/volume percent is a measure of concentration that indicates the number of grams of solute in each 100 mL of solution.

In other words, the volume percent of a component in the solution is defined as the ratio of the mass of solute that is present in a solution, relative to the volume of the solution, as a whole.

The volume percentage of a solution is determined by the following expression:

[tex]mass/volume percent=\frac{mass of solute}{volume of solution}100[/tex]

In this case, you know:

Replacing in the definition of mass/volume percent:

[tex]mass/volume percent=\frac{22 g}{83 mL}100[/tex]

Solving:

mass/volume percent= 26.5 %

Finally, the mass/volume percent in this solution is 26.5%.

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Answer:

A

Explanation:

the enzyme is substrate specifix coz of this trait

Answer:

The name of it is Sulfur Hexafluoride

Explanation:

Bonus fact: It is over 5 times heavier than air so when inhaling it, it makes your voice go very deep. The opposite of helium some would say

Answer:

4.002602

Explanation:

the average that reflects the typical ratio of natural abundances of its isotopes.

The weight of 5 helium atoms in grams is 20.01301 grams.

Atoms are defined as the smallest unit into which matter can divided without the release of electrically charged particles.

It is also defined as a building block of matter and were discovered after big bang theory.  It is a fundamental piece of matter.

The weight of 1 helium atom = 4.002602 g

So, the weight of 5 helium atom = 4.002602 x 5

                                                      = 20.01301 g

Thus, the weight of 5 helium atoms in grams is 20.01301 grams.

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Answer:

28ft

Explanation:

if it's a square then each side is equal

the square root of 49 is 7

each side is 7 ft

7 ft times 4 sides is 28ft

Answer:

A. Oxygen pushes electrons towards the hydrogens.

Explanation:

The oxygen is reduced because it undergoes a partial gain of electrons. The oxygen atom in water has greater electron density near it than they did in the O₂ molecule.

Reduction is a chemical reactions in which the number of electrons associated with an atom or a group of atoms is increased.

The electrons taken up by the substance reduced are supplied by another substance, which is thereby oxidized.

The hydrogen is oxidized because it added oxygen to form water.

Conversely the oxygen is reduced because it added hydrogen to form water.

Therefore, The oxygen is reduced because it undergoes a partial gain of electrons. The oxygen atom in water has greater electron density near it than they did in the O₂ molecule.

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Answer:

60 kilometres per hour is the slowest rate of travel

Explanation:

we convert

20 kilometer per minute into kilometer per second

it comes out 1/3 kilometer per sec

Answer:

c

Explanation:

a- 5/1km per second

b-1/3km per second

c. 1/60km per second

the larger the denominator the smaller the fraction

Answer:

1. Moon and sun are at right angles to the earth

2. Smaller than normal range of highs and low tides

3. Gravity of the sun and moon work against each other

Answer:

three half-filled orbitals

Answer:

6p

Explanation:

It can hold a total of 6

Answer:

Electronegativity

Explanation:

The ability of an atom to attract itself an electron pair shared with another atom in a chemical bond.

The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.

An electrical charge is a type of positive or negative charge of the particles that move in a conductor.

At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.

The electrical charges depend on the charge's initial time, the final time, and the net outward current.

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