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f = 5.08 x 10¹⁴/s

E=3.366 x 10⁻¹⁹ J

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3.10⁸

λ = wavelength

I will give example number 1, and for subsequent numbers, the steps will be the same

For NaNO₃ with λ=590 nm=5.9 x 10⁻⁷m

Frequency(f) :

[tex]\tt f=\dfrac{3.10^8}{5.9\times 10^{-7}}=5.08\times 10^{14}/s[/tex]

Energy(E) :

[tex]\tt E=6.626.10^{-34}\times 5.08\times 10^{14}=3.366\times 10^{-19}~J[/tex]

Answer:

c

Explanation:

all the atoms must be balanced.

The coefficient for O₂ after balancing the equation is 4. The correct answer is A. 4.

To balance the equation C₄H₈ + O₂ → 4CO₂ + 4H₂O, we need to ensure that the number of each type of atom is the same on both sides of the equation.

Starting with carbon (C), we have 4 carbon atoms on the left side and only 1 on the right side (in CO₂). To balance carbon, we place a coefficient of 4 in front of CO₂:

C₄H₈ + O₂ → 4CO₂ + H₂O

Next, we move on to hydrogen (H). There are 8 hydrogen atoms on the left side, but only 2 on the right side (in H₂O). To balance hydrogen, we place a coefficient of 4 in front of H₂O:

C₄H₈ + O₂ → 4CO₂ + 4H₂O

Now, let's consider oxygen (O). On the left side, we have O₂, which contains 2 oxygen atoms. On the right side, there are 4 CO₂ molecules, each containing 2 oxygen atoms, and 4 H₂O molecules, each containing 1 oxygen atom. So, the total number of oxygen atoms on the right side is (4 x 2) + (4 x 1) = 8.

To balance oxygen, we need to have 8 oxygen atoms on the left side as well. Therefore, we place a coefficient of 4 in front of O₂:

C₄H₈ + 4O₂ → 4CO₂ + 4H₂O

Therefore, the coefficient for O₂ after balancing the equation is 4.

The correct answer is A. 4.

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Answer:

Lavoisier disproved the phlogiston theory. He demonstrated that there was an element called oxygen that played a major role in combustion. He also showed that the mass of products in a reaction are equal to the mass of the reactants. The phlogiston theory did not account for the weight changes found in fire. Lavoisier hypothesized that it was probably the fixation and release of air, rather than fire, that caused the observed gains and losses in weight.

Answer:

B.) a cation that is smaller than the original atom

Explanation:

When the atoms of an element gains or loses electrons, it becomes charged. This charged atom is called an ION. An ion can either be a CATION or ANION depending on whether the atom loses electrons to become positively charged (cation) or gains electrons to become negatively charged (anion).

In this case, magnesium (Mg) atom gives up or loses electron(s) to become an ion, it will become positively charged and hence called a CATION. However, since it loses electrons in its atom, it becomes SMALLER than the original magnesium atom. This is because the electrons left in the atom becomes more attracted to the nucleus and decreases the ionic radius.

Answer:

2 has 6 on the outer shell

Answer:

the answer is c

b/c contain more than one element

Answer:

4.3/5. 129

Explanation:

Hope this is correct

Explanation:

Private enterprise refers to the enterprise owned, managed and controlled by private persons. Public enterprise refers to the enterprise owned, manage and controlled by government. Private enterprise main motive is earning profit. ... Private enterprise involves funds from individuals.

eating healthy foods

working out and eating healthy helps

Answer:

higher as

beacause having  a healthy diet inproves

your health

Explanation:

Answer:

Zinc, copper sulfate

Explanation:

The reactants are the ones on the left side

In the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.

Reactants may be defined as substances or compounds that undergo chemical reactions and have been altered during the course of an incident. Such compounds or substances most of the time are catalyzed by numerous catalysts in order to accomplish the conversion of reactancts substances faster.

The given reaction illustrates an example of a displacement reaction. During this reaction, when zinc is added to copper sulfate solution, zinc displaces copper and forms zinc sulfate solution. It will demonstrate a type of redox reaction.

This happens because on the basis of the reactivity series which determines that zinc is considered to be more reactive than copper.

Therefore, in the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.

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Answer:

Explanation:

Since electrons are particles that are in constant movement in a wave-like motion, is impossible to know exactly their position and velocity at all times. That's why instead of defining an orbit for them we define an atomic orbital, which is a location in space where the probability of finding an electron is high (therefore, is an electron dense zone). Since this zone has not defined limits (the wave function characterizing the orbital extend from the nucleus to infinity), the further we go from the nucleus the less dense this "cloud" is.

There is about a 90 percent probability of finding the electron  within a sphere of radius 100 pm surrounding the nucleus.  Thus, we can represent the 1 s orbital by drawing a boundary surface diagram that  encloses about 90 percent of the total electron density in an orbital, and the shape of this orbital is a sphere.

The boundary surface diagrams of p orbitals, for example, will have the shape of two lobes on opposite sides of the nucleus, that means that within this two lobes we have a 90 percent probability of finding the electron, and so on.

Answer:

condensation

Explanation:

Frost forms when an outside surface cools past the dew point. The dew point is the point where the air gets so cold, the water vapor in the atmosphere turns into liquid. This liquid freezes. If it gets cold enough, little bits of ice, or frost, form

Answer:

a chemiacal

Explanation:

Answer:

Evaporation from the hydrosphere provides the medium for cloud and rain formation in the atmosphere. The atmosphere brings back rainwater to the hydrosphere. The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere.

Explanation:

Because in static friction there is more time or enough time for interlocking of irregularities where as there is minimum time for interlocking of irregularities so that kinetic friction is less than that of static friction

Answer:

spheroidal joint

Explanation:

Ball-and-socket joint, also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint.

Standard pressure is equal to 1 atm. Therefore option 1 is correct.

Standard pressure is equal to 1 atm, which stands for atmosphere. It is a unit of pressure commonly used in the field of chemistry and physics. Standard pressure is defined as the pressure exerted by a column of mercury in a barometer when the atmospheric conditions are at standard temperature and pressure (STP).

STP is defined as a temperature of 0 degrees Celsius (273.15 Kelvin) and a pressure of 1 atmosphere (1 atm). Therefore, at STP, the standard pressure is equal to 1 atm.

While pressure can be measured in various units such as pascals (Pa), kilopascals (kPa), and atmospheres (atm), the standard pressure is specifically defined as 1 atm.

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Answer:

1)conduction

2) convection

3) conduction

4) radiation

5) radiation

6) radiation

7) conduction

8) conduction

9) radiation

10) convection

Explanation:

not 100% sure

Answer:

337 °C

Explanation:

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

Initial volume (V1) = 5.20 L

Initial pressure (P1) = 1.20 atm

Initial temperature (T1) = 32 °C

Final pressure (P2) = 6 atm

Final volume (V2) = 2.08 L

Final temperature (T2) =?

Next, we shall convert 32 °C to Kelvin temperature. This can be obtained as follow:

T (K) = T (°C) + 273

Initial temperature (T1) = 32 °C

Initial temperature (T1) = 32 °C + 273

Initial temperature (T1) = 307 K

Next, we shall determine the final temperature of the gas as illustrated below:

Initial volume (V1) = 5.20 L

Initial pressure (P1) = 1.20 atm

Initial temperature (T1) = 305 K

Final pressure (P2) = 6 atm

Final volume (V2) = 2.08 L

Final temperature (T2) =?

P1V1 /T1 = P2V2 /T2

1.2 × 5.2 / 305 = 6 × 2.08 / T2

Cross multiply

1.2 × 5.2 × T2 = 305 × 6 × 2.08

6.24 × T2 = 3806.7

Divide both side by 6.24

T2 = 3806.7 / 6.24

T2 = 610 K

Finally, we shall convert 610 K to celsius temperature. This can be obtained as follow:

T (°C) = T(K) – 273

T(K) = 610 K

T (°C) = 610 – 273

T (°C) = 337 °C

Thus, the final temperature of the gas is 337 °C.

Answer:

Explanation:

Ionic bond

The electrostatic force between opposite charge ion is known as ionic bond

Covalent bond

The mutual sharing of electron between 2 atoms is known as covelent bond

Answer:

They all wear their skeletons on the outside! This is called an exoskeleton and all creatures that have their structure on the outside are included in the phylum of Arthropods.

Explanation:

Answer:

stays at rest

Explanation:

Answer:

stays at rest

Explanation:

Answer:

put 5 dots

Explanation:

it has 5 valence electrons

Answer:

5

Explanation:

Antimony is in group 15 of the periodic table which means it has 5 valence electrons. Therefore, its Lewis Diagram should contain 5 dots to represent these 5 valence electrons.

Hope this helped!