What is the energy of light with a wavelength of 652 nm? (The speed of light in a vacuum is 3.00 x 108 m/s, and Planck's constant is 6.626 x 10-34 J·s.)
O A 3.05 x 10-²⁸ j
O B. 3.28 x 10¹⁸ j
O C. 3.05 x 10-¹⁹ j
D. 3.28 x 10²⁷ j

A and C have negative exponents pleas help me​

Answers

Answer 1

Answer:

C. 3.05 x 10⁻¹⁹ J

Explanation:

Given;

wavelength of the light, λ = 652 nm = 652 x 10⁻⁹ m

speed of light, c = 3.00 x 10⁸ m/s

Planck's constant, h = 6.626 x 10⁻³⁴J·s

Energy of electromagnetic wave is calculated as;

E = hf

where;

f is frequency of the light wave

f = c / λ

[tex]E = hf = h\frac{c}{\lambda} \\\\E = \frac{hc}{\lambda} \\\\E = \frac{6.626*10^{-34}*3*10^8}{652*10^{-9}} \\\\E = 3.05*10^{-19} \ J[/tex]

Therefore, the energy of the light is 3.05 x 10⁻¹⁹ J

The correct option is "C"

C. 3.05 x 10⁻¹⁹ J

Answer 2

Answer:

Option C. 3.05 x 10¯¹⁹ J

Explanation:

Step 1:

Data obtained from the question.

wavelength (λ) 652 nm = 652x10^–9m

Velocity of light (v) = 3.00x10^8 m/s

Planck's constant (h) = 6.626x10^-34J·s

Step 2:

Determination of the frequency of the light.

The frequency can be obtained as follow

v = λf

3x10^8 = 652x10^–9 x f

Divide both side by 652x10^–9

f = 3x10^8 / 652x10^–9

f = 4.6x10^14s¯¹

Step 3:

Determination of the energy of the light wave.

This can be obtained as follow:

Planck's constant (h) = 6.626x10^-34J·s

Frequency (f) = 4.6x10^14s¯¹

Energy (E) =..?

E = hf

E = 6.626x10^-34 x 4.6x10^14s¯¹

E = 3.05 x 10¯¹⁹ J


Related Questions

What state of matter has indefinite volume and is compressible?

a. Gas

B. Liquid

C. Both Liquid and Gas

D. Solid

Answers

The answer is A. Gas


Balance the combustion reaction between octane and oxygen.

2C ₈ H ₁₈ + O ₂ → CO ₂ + H ₂ O

Answers

Answer:

The answer is 2C8H18 + 25O2 16CO2 + 18H2O .

(Correct me if I am wrong)

What is the primary difference between a hypothesis and a theory?

Answers

Answer: A hypothesis is an explanation for observations. A theory is an explanation for what has been shown many times.

Explanation:

What happens at the particle level during a chemical reaction?

Answers

Answer:

Reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.RT

Explanation:

Consider the model of the nitrogen atom which electron configuration matches the model

Answers

Answer:

           1s², 2s², 2p³  

Explanation:

The atomic number of Nitrogen is seven. So it contains seven protons and seven electrons in neutral form. Also, the electronic configuration cited above contains seven electrons among which two electrons are present in first shell and five electrons are present in valence shell respectively.

One million argon atoms is how many mol of argon atoms? (2 significant figures)

Answers

Answer:

1.66 * 10^-18 mol of Argon

Explanation:

Avogadro says 1 mol of anything has 6.022* 10^23 atoms/particles. Thus using this principle, 1 million argon atoms will have

[tex]1,000,000 atoms Argon * \frac{1mol Argon}{6.022*10^{23} atoms }[/tex]

[tex]1.66*10^{-18} mol \\\\ of Argon[/tex]

One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.

To convert one million (10⁶) argon atoms to moles of argon atoms, we will use Avogadro's number: there are 6.02 × 10²³ argon atoms in 1 mole of argon atoms.

[tex]10^{6} atom \times \frac{1 mol}{6.02 \times 10^{23}atom } = 1.7 \times 10^{-18} mol[/tex]

One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.

You can learn more about Avogadro's number here: https://brainly.com/question/13302703

In The diagram which part is negatively charged?

• solid Cu

• wire

• salt bridge

• solid Zn

Answers

Answer:

Solid Zn

Explanation:

I took the test :-)

In the diagram solid Zn is negatively charged.

When is solid Zn is negatively charged?

Zinc is known as a element that acts as a negative electrode based on the fact that it has more negative potential and acts as the anode.

Based on the fact that zinc is a metal, it is known to often forms metallic compounds with other kinds of metals and based on the fact that it also has an ion charge of +2, the zinc ions are referred to as a strong reducing agents and thus do form ionic bonds.

Learn more about negative charge from

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How many hours will it take for only 1.5625 mg to remain

Answers

Answer:

36 hours

Explanation:

Notice that you are given the actual table of how the isotope reduces , and it shows that for each period of 6 hours the isotope decays to half of the initial number.

EVery 6 hours, the reduction in number of mg of the isotope goes down in half'

100 mg, then 50 mg, then 25 mg, then 12.5 mg, then 6.25 mg, then 3.125 mg and finally (reaching 1.5625 mg

That was 6 periods of 6 hours each, which totals: 6 time 6 hours = 36 hours

Match each element to its electron dot diagram. The symbol X represents the element. Refer to the periodic table if needed. fluorine sodium phosphorus magnesium One of the X's didn't work, but it had 2 dots on top, 2 on the right, 2 on the bottom, and 1 on the left.

Answers

Answer:

The atom with one outer most electron is sodium

The atom with two outermost electrons is magnesium

The atom with five outermost electrons is phosphorus

Explanation:

A dot structure of an atom shows the number of electrons present on the outermost shell of that atom. In order words, a dot structure shows the valence electrons present on the valence shell of an atom.

Sodium has an atomic number of 11, hence the electrons are arranged in three shells in the following order 2,8,1. This implies that one electron is present on it's outermost shell.

Magnesium has an atomic number of 12. Its electrons are arranged in shells in the order; 2,8,2. Hence, two electrons are present in its outermost shell.

Phosphorus contains 15 electrons(atomic number of 15), these electrons are arranged in shells in the order 2,8,5. Hence there are five outermost electrons present in phosphorus.

Answer:

1 dot sodium

2 dots Magnesium

7 dot Fluorine

5 dot Phosphorus

Explanation:

What is the molar mass of CaS

Answers

=molar mass( CaS )

= 40.08+32.07

=72.15 g mol-1

Molar mass= atomic weight = (Ca= 40.08 and S= 32.07)

Answer:

72.143 g/mol

Explanation:

PLEASE HELP ME ASAP Explain why each of these elements occurs as diatomic molecules. Match the words in the left column to the appropriate blanks in the sentences on the right.

Answers

Answer:

The answer to your question is given below

Explanation:

1. When two hydrogen atoms pair together, they form a single bond to achieve complete duet.

Hydrogen atom has 1 shell and 1 valence electron and they contribute it to form bond, thereby obtaining a stable duet configuration

H + H —> H–H —> H2

2. When two halogen atom pair together, they form a single bond to achieve a complete octet which is stable. For example, Cl has 7 electrons in its outermost shell and need 1 more electron to complete it octet. Each Cl will contribute 1 electron each to form a single bond..

Cl + Cl —> Cl–Cl —>Cl2

3. When two oxygen atoms pair together, they form double bond to achieve a complete octet which is a stable configuration.

Oxygen has 6 electrons in its outermost shell and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.

O + O —> O=O —>O2

4. When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable. Nitrogen has 5 electrons in its outermost shell and needs 3 more electrons to complete it octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.

N + N —> N≡N —> N2.

The explanation as to why each of the elements occurs as diatomic molecules is as follows;

When two hydrogen atoms pair together, they form a single bond to achieve complete duet.

Hydrogen atom has only the 1 shell and 1 valence electron and an Hydrogen molecule is formed when the duet is achieved.

H + H —> H–H —> H2

When two halogen like Chlorine, Cl (each with a valency of 7) atoms yields a single bond to achieve a complete octet which is stable. Each Cl will contribute 1 electron each to form a single bond..

Cl + Cl —> Cl–Cl —>Cl2

Upon bonding of two oxygen atoms, a double bond is formed to achieve a complete octet which is a stable configuration.

Oxygen has a valency of 6 and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.

O + O —> O=O —>O2

When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable.

Nitrogen has a valency of 5 and needs 3 more electrons to assume an octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.

N + N —> N≡N —> N2.

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PLEASEEEE HELP MEEE


For the reaction 2H2 + O2 → 2H2O, how many grams of water are produced from 26.0 mol of hydrogen?

Answers

the answer is i don’t know because i’m just doing this for points sorry!!! hope this helps

A 390 mL solutions of 4.6 M HCl is left out over the weekend and 74 mL of solvent evaporates. What is the new concentration of HCl?

Answers

Answer:

5.7 M

Explanation:

You have .390 L of 4.6 M HCl.

.390 L * 4.6 mol/L = 1.794 mol HCl

.390-.074=.316 L solvent remaining

1.794 mol/.316 L=5.7 M HCl

plz help i need the answer ASAP If 6.20 cm3 of a 6.75 M (M = mol/dm3) solution are diluted to 85.6 cm3 with water, what is the concentration of the final solution?

A. 6.75 (6.20/85.6)

B. 6.75 (8.56/6.20)

C. 6.75 (6200/85.6)

D. 6.75 (85.6/6200)

a) A
b) B
c) C
d) D

Answers

Answer:

Option A. 6.75 (6.20/85.6)

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 6.2cm³

Initial concentration (C1) = 6.75M

Final volume (V2) = 85.6cm³

Final concentration (C2) =.?

The final concentration can be obtained by using the dilution formula as show below:

C1V1 = C2V2

6.75 x 6.2 = C2 x 85.6

Divide both side by 85.6

C2 = (6.75 x 6.2) /85.6

C2 = 6.75 (6.2 / 85.6).


Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.

C + Fe ₂ O ₃ → CO ₂ + Fe

Answers

Answer:

3C + 2Fe ₂ O ₃ → 3CO ₂ + 4Fe

Explanation:

C + Fe ₂ O ₃ → CO ₂ + Fe

Left Side

C = 1

Fe = 2

O = 3

Right Side

C = 1

Fe = 1

O = 2

So we can see that while Carbon is balanced Fe and O are not.

We then attempt to balance the equation by balancing the Oxygen.

C + 2Fe ₂ O ₃ → 3CO ₂ + Fe

Left Side

C = 1

Fe = 4

O = 6

Right Side

C = 3

Fe = 1

O = 6

Oxygen is now balanced but C and Fe are not, though this is an easy fix as each are independent on each side of the equation.

3C + 2Fe ₂ O ₃ → 3CO ₂ + 4Fe

Left Side

C = 3

Fe = 4

O = 6

Right Side

C = 3

Fe = 4

O = 6

Answer:

2 , 3 , 4 , 3

Explanation:

For addition and subtraction, round the result to
match the measurement with the fewest decimal
places. For example,
3.4 cm + 4.75 cm = 8.2 cm
because 3.4 cm is only measured to the nearest
0.1 centimeter.
Choose the answer with the correct number of
significant digits.
4.6 cm + 2.35 cm =
v cm

Answers

Answer:

7.0

Explanation:

second question is 4.90 third question is 3.0 fourth question is 6.6

Answer:

The first answer is 4.6 cm + 2.35 cm =  7.0  cm

The second answer is 8.45 cm – 3.55 cm =  4.90  cm

The third answer is 1.2 cm × 2.54 cm = 3.0  cm^2

Then the last answer is 6.6 cm^3 ÷ 1.00 cm^2 =  6.6  cm

I hope this helps, Its correct on edge 2020 :)

Which is the best summary of the kinetic theory?
A. Potential energy is converted to kinetic energy.
O B. Atomic motion is constant at all temperatures.
C. Atoms and molecules are always in motion.
O D. Energy cannot be created or destroyed.
SUBMI

Answers

Answer:

C. Atoms and molecules are always in motion.

answer: C. atoms and molecules are always in motion

2 Points
You are a forensic scientist working for a police department. One piece
of evidence from your current case is a letter written in a strange ink. You
must separate the pigments in the ink to determine what it is made from.
What procedure should you use?
A. Distillation
O
B. Evaporation
C. Filtering
d
d
D. Chromatography
Reset Selection

Answers

The answer is D. Chromatography

Do you is the correct answer because chromatography refers to the science of splitting mixtures to identify what they’re made of. I hope this helps.

A skeleton chemical equation includes which of the following

Answers

Answer:

Explanation:

Skeleton equations are also known as unbalanced equations.

Eg I react Oxygen, Hydrogen and Chlorine and I get Water and Chlorine Gas

H2 + Cl2 = HCl

Left Side

H = 2

Cl = 2

Right Side

H = 1

Cl = 1

As you can see it's not balanced is skeleton equation.

The atomic number of an atom is
a) The mass of the atom
b) The number of protons added to the number of neutrons
c) The number of protons
d) Negatively charged

Answers

Answer:

b, the number of protons added to the number of neutrons

Explanation:

what is characteristics of the 6kingdoms

Answers

Answer:

Archaea, Bacteria, Protista, Fungi, Plantae, and Animalia

What is characteristics of the 6 kingdoms.

6 kingdoms of what? Are you talking about biology?

If yes I assume you're talking about the defitions for the animal kingdom made by Woese and his colleagues in 1977.

Eubacteria:  Single-celled bacterial organisms.

Archaebacteria: Single celled bacterial organisms that live in extreme enviroments

Protista : Single-celled organisms more complex than bacteria

Plantae: Multi-celled, complex organisms that produce their own food

Fungi: Multi-celled organisms that don't produce their own food

Animalia: Complex, multi-celled, organisms that consume other organisms for food.

10 Points
Atoms are very small. Approximately how many atoms would it take to
make a stack as thick as a potato chip?
O
A. Thousands
O
B. Hundreds
C. Billions
OD. Millions
Reset Selection

Answers

Answer:

C. Billions

Explanation:

or even more

A compound contains 57.2 percent carbon, 6.1 percent hydrogen, 9.5 percent nitrogen, and 27.2 percent oxygen. What the empirical formula of the compound?

Answers

Answer:

So the empirical formula is C14H18N2O5

Explanation:

C = 57.2% = 12g/mol

H = 6.1% = 1g/mol

N = 9.5% = 14g/mol

O = 27.2% = 16g/mol

Empirical Formula for compound hmm

Assume

C = 57.2g

H = 6.1g

N = 9.5g

O = 27.2g

So we have

C = 57.2g/12g =  4.76  moles

H = 6.1g/1g      =  6.10   moles

N = 9.5g/14g   =  0.68  moles

O = 27.2g/16g =  1.70   moles

Divide each mole value by the smallest number of moles calculated.  Round to the nearest whole number.

C =  4.76  moles / 0.68 moles = 7

H = 6.10   moles / 0.68 moles = 9

N = 0.68  moles / 0.68 moles = 1

O = 1.70   moles / 0.68 moles = 2.5

Ok so we now have the ratios but for O it's 2.5, have to be whole numbers so we will need to double all the numbers.

C = 14

H = 18

N =  2

O =  5

So the empirical formula is C14H18N2O5

In the photoelectric effect, what happens when light hits the metal?
A. Electrons are knocked off atoms, causing electricity to flow.
B. Electricity is produced in the metal, causing light to be emitted.
C. Light is reflected off the metal, causing electrons to form.
D. Electrons are pumped into the metal, causing electricity to flow.

Answers

Answer: A. Electrons are knocked off atoms, causing electricity to flow.

Explanation:

Photoelectric effect is defined as emission or ejection of electrons from the surface of a metal when a light of certain frequency falls on the surface of the metal. Electrons emitted in this effect can be called photoelectrons.

The light which falls on the surface of the metal must be of sufficiently high frequency called as threshold frequency.

Thus light knocks off the electrons and thus the flow of electrons will result in the production of electricity.

Thus the correct option is Electrons are knocked off atoms, causing electricity to flow.

Which equation represents neutralization?
6Li(s) + N2(g) → 2Li3N(S)
2Mg(s) + O2(g) → 2MgO(S)
2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(l)
Pb(NO3)2(aq) + K2CrO4(aq) → 2KNO3(aq) PbCrO4(s)

Answers

Answer:

2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(l)

Explanation:

A neutralization reaction refers to any reaction between an acid and a base to form salt and water only. In a neutralization reaction, the key reaction that takes place to produce water is shown ionically below;

H^+(aq) +OH^-(aq) ----> H2O(l)

Looking at all the options provided, our gaze will have to settle on the reaction;

2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(l)

We can clearly see that there is an acid that reacts with a base to form a salt and water. The base contains the OH^- ion while the acid contains the hydrogen ion.

This is the only reaction of this sort among the options hence it is the correct answer.

Which type of reaction is described by the following equation? Na2O (s) + 2CO2 (g) + H2O (g) produces 2NaHCO3 (s)

Answers

Answer:

If the reaction is going from left to right it would be synthesis, if going right to left it would be decomposition.

Explanation:

Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)

Left Side

Na = 2

O = 6

C = 2

H = 2

Right Side

Na = 2

O = 6

C = 2

H = 2

Ok so is balanced already, though initial equation in question had an error in regards to the left hand side the ) should have been an O.

Hmm

Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)

If it was going from right to left would be decomposition

But going from left to right it would be synthesis

Use the balanced equation below to answer the question that follows
6 CO2 + 6H2O - CH206 +60,
How many moles of water are needed to produce 4 moles of CH420?-
a.4
b. 6
c. 10
d. 24

Answers

The answer will be C

Choose the correct coefficients to balance the following equation: __CaCO3 + __HC; Produces __CaCl2 + __CO2 + __H2O

Answers

Answer:

CaCO3 + 2HCl = CaCl2 + CO2 + H2O

Explanation:

CaCO3 + HCl = CaCl2 + CO2 + H2O

Error in equation should be HCl on left hand side not HC

Left Side

Ca = 1

C = 1

O = 3

H = 1

Cl = 1

Right Side

Ca = 1

C = 1

O = 3

H = 2

Cl = 2

So we'll try and balance the Chlorine

CaCO3 + 2HCl = CaCl2 + CO2 + H2O

Left Side

Ca = 1

C = 1

O = 3

H = 2

Cl = 2

Right Side

Ca = 1

C = 1

O = 3

H = 2

Cl = 2

Yay it worked

As much sugar as will dissolve is added to hot water. The water is then
cooled, and all of the sugar remains dissolved in the solution. Which term
describes the final sugar solution?
O A. Nonsaturated
O B. Saturated
C. Unsaturated
O D. Supersaturated

Answers

The answer is C because it says describe the final sugar and C is unsaturated and in the problem it says as much as sugar will dissovle .

1. Identify whether each of the elements is a metal, non-metal, or metalloid:
Ruthenium: Neon:
Germanium: Neptunium:
Iodine: Strontium:
Cesium: Europium:

Answers

Answer:

neon - non metal

Explanation:

Answer:

Ruthenium → metalloidNeon → non-metalGermanium → metalloidNeptunium → metalIodine → non-metalStrontium → metalCaesium → metalEuropium → metal
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