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Tanzania [10]
3 years ago
15

A wave has 9.2 x 10-22 ) of energy. What is its wavelength?

Chemistry
1 answer:
blagie [28]3 years ago
3 0

Answer:

\lambda=2.2x10^{-4}m

Explanation:

Hello!

In this case, since the relationship between energy and wavelength is defined via the speed of light and the Planck's constant as shown below:

e=\frac{c*h}{\lambda}

Since c stands for the speed of light and h for the so-called Planck's constant, we can compute the wavelength as follows:

\lambda=\frac{c*h}{e}=\frac{3.0x10^8m/s*6.626x10^{-34}J*s}{9.2x10^{-22}J}\\\\\lambda=2.2x10^{-4}m

Best regards!

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arlik [135]

Answer:

An objects motion is called kinetic energy.  Which is energy that is cause by movement or motion

Explanation:

8 0
2 years ago
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How many atoms are in 187 g of Calcium?
N76 [4]
Atomic mass Calcium ( Ca) = 40.078 u.m.a

40.078 g --------------- 6.02x10²³ atoms
187 g ------------------- ??

187 x ( 6.02x10²³) / 40.078 =

1.125x10²⁶ / 40.078 = 2.808x10²⁴ atoms

hope this helps!




4 0
3 years ago
You need to prepare 150 mL of 0.1 M solution of silver chloride. How much silver chloride is required?
Rudiy27

Answer:

amount of silver chloride required is 0.015 moles or 2.1504 g

Explanation:

0.1M AgCL means 0.1mol/dm³ or 0.1mol/L

1L = 1000mL

if 0.1mol of AgCl is contained in 1000mL of solution

then x will be contained in 150mL of solution

cross multiply to find x

x = (0.1*150)/1000

x= 0.015 moles

moles of silver chloride present in 150 mL of solution is 0.15 moles

To convert this to grams, simply multiply this value by the molar mass of silver chloride

molar mass of silver chloride AgCl =107.86 + 35.5

                                                     =143.36 g/mol

mass of AgCl = moles *molar mass

                       =0.015*143.36

                        =2.1504g

                        =

4 0
3 years ago
What is the mass of 15 moles of carbon atoms? Round your answer to the nearest hundredth
Georgia [21]

In order to convert the moles of a substance to grams, you will need to multiply the mole value of the substance by its molar mass. More commonly written for this application as: where, is the molar mass of the substance.

Hope this helped

:)

4 0
3 years ago
What information about a compound is given in a chemical formula
rodikova [14]

Answer:

Explanation:

A chemical formula is representation of a compound. Compounds are made up of two or more elements combining together.

The chemical formula of any compound is a representation which shows the elements therein and the mole relationship expressed as subscripts.

  • For example, HCl;

          Elements in HCl -   Hydrogen (H)

                                          Chlorine (Cl)

Here 1 mole of hydrogen chloride molecule consists of 1 mole of chlorine atoms and 1 mole of hydrogen atoms.

4 0
3 years ago
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