Please help!!

How many O2 molecules occupy a 1.0 L flask at 65°C and
103.7 kPa?
Select one:
O a. 28 molecules
O b. 2.2 x 1022 molecules
O c.
1.1 x 1023 molecules
O d.
1.6 x 1025 molecules
e. 1.7 x 1025 molecules

Answer:

A because time 3 is the highest peak than time 1-4 (-3)

Answer:

A. The string vibrated more intensely at time 3 than at time 2.

Explanation:

Fission is the formation of two smaller atoms by the collision of the neutrons. The quantity of energy produced per gram is 7.23 × 10¹⁰ J/g.

Nuclear fission is a process in which the neutron collides with the atom and results in the formation of two isotopes.

The nuclear fission reaction is shown as,

[tex]\rm ^{235}_{92}U + ^{1}_{0} n \rightarrow ^{144}_{54} Xe + ^{90}_{38}Sr + 2^{1}_{0}n[/tex]

Energy in joules is calculated by the Einstein's formula as:

[tex]\begin{aligned} \rm E &= \rm mc^{2}\\\\&= 3.139 \times 10^{-28} \times (2.99 \times 10^{8})^{2}\\\\&= 2.82 \times 10^{-11}\;\rm J\end{aligned}[/tex]

Energy per gram is calculated as:

[tex]\begin{aligned}& =\dfrac{ (2.82 \times 10^{-11})(6.022 \times 10^{26})}{235.043}\\\\&= 0.0722 \times 10^{12}\\\\&= 7.23 \times 10^{10} \;\rm J/g\end{aligned}[/tex]

Therefore, the energy per gram of the fission is [tex]7.23 \times 10^{10} \;\rm J/g.[/tex]

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Answer:

increases

Explanation:

The energy increases (temp increases)....the molecules become further apart and the liquid expands up the graduated scale of the  thermometer to show temp

Answer:

nuclear power, natrual gas , coal power

Explanation:

i took the quiz.

Answer:

zero

Explanation:

Answer:

Zero.

Explanation:

The overall formal charge in CF4 is zero.

Answer:

2 unpaired electrons

Explanation:

Carbon's bonding state electron configuration is 1s2 2s1 2s1 2p1 2p1. So, there are 4 unpaired electrons in the orbitals of carbon in bonding state.

hope this helps

Answer:

16128 J

Explanation:

Data:

Wanted:

Solution:

Note:

The answer is not in a correct significant figure. So, make sure you have a correct significant figure.

Answer:

[tex]V_2 = 0.0167L = 16.7 mL[/tex]

Explanation:

[tex]c_1 V_1 = c_2 V_2\\2.0 M \cdot 0.100L = 12M \cdot V_2\\V_2 = \frac{2.0M \cdot 0.100L}{12M} = 0.0167L = 16.7 mL[/tex]

Answer:

1.38 M

Explanation:

Need to use the Molarity equation M=n/L

23.5g/ 17.031g/mol NH3 = 1.38 moles

1.38 moles/ 1.0 L = 1.38 M

Answer:

I think this will help you

Explanation:

PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE

Answer:

sound

Explanation:

Kinetic energy = 1/2 m v^2    

  KE requires movement    

Answer:

They are both very aggressive animals! And amazing hunters at night!

Explanation:

I hope this helps! :)

Answer:

Owl and wolfs dodnt really have simuarities tbh lol, but they are both fercious animals :)

Explanation:

Explanation:

please see images... hope this helps!

Answer:

No. A

Explanation:

cause due to the friction between both molecules heat is produced rapidly.

The answer is A) Heat transfer through electromagnetic waves.

Cause due to the friction between both molecules heat is produced rapidly.

Radiation can harm the DNA in our cells. Excessive doses of radiation can motivate Acute Radiation Syndrome (ARS) or Cutaneous Radiation accidents (CRI). High doses of radiation could also cause most cancers later in life.

Radiation is a mutagen, which finally can lead to cancer. Radiation can either kill cells or harm the DNA within them, which damages their capacity to reproduce and might in the end cause cancer. whilst radiation is a gift, excessive electricity debris bypasses your body.

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Increases the pressure          l

_____________________

Removing Energy                    l

Answer:

0.42 moles Na₂O

Explanation:

Molarity: 1.2 M

Volume (mL): 350 mL

Volume (L): 0.35 L

350 mL / 1,000 mL = 0.35 L Na₂O

Molarity (M) =  moles / liters (L)

1.2 M Na₂O = ? moles / 0.35 L Na₂O

(1.2 M Na₂O) x (0.35 L Na₂O) = ? moles

? = 0.42 moles Na₂O

Answer:

The primary function of chemical nomenclature is to ensure that a spoken or written chemical name leaves no ambiguity concerning which chemical compound the name refers to: each chemical name should refer to a single sub

Answer:

precipitation means water droplets may grow as a result of additional condensation of water vapor when the particles collide. If enough collisions occur to produce a droplet with a fall velocity which exceeds the cloud updraft speed, then it will fall out of the cloud as precipitation.

Explanation:

i knew this alr

Answer:

12.82 liters

Explanation:

From periodic chart ...mole weight of neon = 20.1797 gm/mole

23 g / 20.1797 g/mole = 1.14 moles

PV = n R T          R = gas constant = .082057 L-Atm / K-mole

                            n = 1.14

                             T = 1 C = 274.15 K

2 * V = 1.14 * .082057 * 274.15     Solve for V = 12.82 liters

Answer:

electric charge

Explanation:

The required volume of sample of neon occupy at these conditions of temperature and pressure is 25.2L.

Mass (W) in grams of helium gas will be converted into moles (n) by using the below equation:

n = W/M, where

M = molar mass = 4g/mol

n = 12g / 4g/mol = 3 mol

n = 24g / 4g/mol = 6 mol

And for this question as pressure and temperature for both the conditions is constant so ideal gas equation becomes:

V₁/n₁ = V₂/n₂, where

V₁ = initial volume = 12.6 L

n₁ = initial moles = 3 mol

V₂ = final volume = ?

n₂ = final moles = 6 mol

On putting these values, we get

V₂ = (12.6)(6) / (3) = 25.2 L

Hence required volume of neon gas is 25.2 L.

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Answer:

The least metallic or most non-metallic element is fluorine.

Explanation:

hope this helps

pls mark brainliest

Answer:

P + O2 --> P2O5

Explanation:

For a simple match burning you can use the following equation: P + O2 --> P2O5 To balance the reaction you have to make sure you have the same amount of each element on both sides.

The second law of thermodynamics states, in part, that "every spontaneous activity in any isolated system always leads in a rise in the entropy of that system." Because the universe is an isolated system, this assertion may be represented mathematically as follows: (1.6-2)

Answer:

1. Conduction

2. Convection

Explanation:

1. Conduction is the transfer of energy from one end of something to the other. Since the pad is heating up your back and no fluids or gasses are involved it is conduction.

2. Convection is the transfer of energy through air. Since the air is transferring its energy to the ice it is convection.  

Answer:

6

Explanation:

Count the number of species that are bonded to chromium in this complex ion. There are four ammonia molecules and two chlorine atoms bonded to chromium. This yields a coordination number of 6.

The co-ordination number of chromium ion in complex [Cr(NH₃)₄Cl₂][tex]^+[/tex] is six as there are four ammonia molecules and 2 chlorine molecules bonded to chromium which gives total co-ordination number of 6.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.

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Answer:

The solubility graph is a very useful tool because it tells you the amount of potassium nitrate that can be dissolved per

100 mL

of water in order to have a saturated solution of potassium nitrate at a given temperature.

In order to find the solubility of the salt at

60

∘

C

, start from the

60

∘

C

mark on the graph and move up until you intersect the curve. At the point of intersection, move left until you intersect the

y

axis and read off the value that you land on.

In this case, you can estimate that the solubility of potassium nitrate in water at

60

∘

C

is equal to about

The mass percentage of water (H₂O) in cadmium chloride tetra hydratesolution is equal to the 28.2%.

Mass percentage of any substabce present in any solution will be calculated as:
Mass percent = (Mass of substance/Total mass of solution)×100%

According to the question,

Mass of water (H₂O) = 18.02 g/mol

Mass of solvent (CdCl₂.4H₂O) = 183.32 + 4(18.02) = 255.4 g/mol

On putting values, we get

Mass percent = (18.02 / 255.4) × 100% = 28.2%

Hence mass percent of water is 28.2%.

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Answer:The temperature at which the motion of particles theoretically ceases is 00A or absolute zero, Absolute 00 is the definition of 00 on the Kelvin and Rankine temperature scales.

Explanation: