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miss Akunina [59]
3 years ago
6

A photon has a wavelength of 6.2 meters. Calculate the energy of the photon in joules. (Planck's constant is 6.626 × 10-34 joule

seconds, the speed of light is 2.998 × 108 m/s)
Chemistry
2 answers:
larisa86 [58]3 years ago
8 0

Answer:

plato ppl the answer is b

Juli2301 [7.4K]3 years ago
4 0

Wavelength = (planck’s constant) (speed of light) / Energy

6.2 (Energy) = (6.63 •10^-34) (3•10^8)

1.989•10^-25 / 6.2 =

3.2081 • 10^-26 is the answer
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Which phase of matter has molecules with the highest kinetic energy?
WITCHER [35]

Gases has highest Kinetic energy as kinetic energy is the movement of molecules between the intermolecular spaces.

Please please try to answer my question as I am a forgeiner from India

4 0
4 years ago
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The active ingredient in aspirin is acetylsalicylic acid (MW = 180.2 g/mol). An aspirin tablet was dissolved in
Mashcka [7]

Answer:

1214 mg

Explanation:

Data given

Volume of NaOH solution (V) = 14.85 mL

Molarity of NaOH solution (M) = 0.100 M NaOH.

Amount of acetylsalicylic acid = ?

Molecular weight = 180.2 g/mol

Solution:

It is a acid base titration

As equal amount of NaOH will neutralize equal amount of acetylsalicylic acid.

First find the moles of NaOH

As we know

                 M = moles of solute / 1 L x volume of solution

Rearrange and modify the above equation

                 moles of NaOH = M of NaOH x 1 L / volume of NaOH solution

Put values in above equation

                moles of NaOH = 0.100 M x 1 L / 14.85 mL

                moles of NaOH = 0.0067 moles

Now find to find the weight of acetylsalicylic acid

As

equal amount of NaOH will neutralize equal amount of acetylsalicylic acid.

                 moles of acetylsalicylic acid =  moles of NaOH.......... (1)

As we know  

                  no. of moles = mass in g / molar mass

So,

The modified form of equation 1 will be

              mass in g / molar mass (acetylsalicylic acid) =  moles of NaOH

Put values in above equation

                  mass in g / 180.2 g/mol = 0.0067 moles

Rearrange the above equation

                mass of acetylsalicylic acid = 0.0067 moles x 180.2 g/mol

                 mass of acetylsalicylic acid = 1.214 g

Convert the grams to milligrams

1 g = 1000 milligram

So,  

1.214 g = 1214 mg

5 0
4 years ago
A chemist heats a fixed amount of gas in a sealed glass container. Which law is the chemist most likely investigating?
PilotLPTM [1.2K]

The law which this chemist is most likely investigating heating a fixed amount of gas in a sealed glass container is: Gay Lussac’s law.

Gay Lussac's law states that when the volume of an ideal amount of gas is held (kept) constant, the pressure of the gas is directly proportional to the absolute (Kelvin) temperature of the gas.

Mathematically, Gay Lussac's law is calculated by using the formula;

PT = K\\\\\frac{P_1}{T_1} = \frac{P_2}{T_2}

<u>Where:</u>

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In conclusion, the chemist is most likely investigating how changes in temperature affect the pressure of the gas by heating a fixed amount in a sealed glass container in accordance with Gay Lussac's law.

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8 0
3 years ago
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Which pair of atoms has the highest electronegativity difference?
zavuch27 [327]
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E. C-H = 2.5 - 2.1 = 0.4

As show, D. has the highest difference. Without looking at their values, you can also determine the pair with the highest difference by taking note of the trend of electronegativity on the periodic table. Electronegativity increases as you go right a group and up a period. This makes oxygen the most electronegative element among the other elements paired with hydrogen.
4 0
3 years ago
Assuming no errors were made in measuring the yield, can the percent yield of a chemical reaction be greater than 100%?
Dennis_Churaev [7]

Answer:

No percent yield is actual yields/ theoretical yields .x 100%.

Explanation:

The theoretical yield is the maximum amount of product that could be formed from given amounts of products. The actual yield must be less than or equal to the theoretical theory.

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