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ddd [48]
3 years ago
8

Light energy travels in

Chemistry
2 answers:
Mademuasel [1]3 years ago
7 0

Light energy travels in the form of waves.

telo118 [61]3 years ago
5 0
Light travels in the form of a wave when it travels.
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A model of an atom is shown below. Which element is represented by this model of an atom?
IRISSAK [1]
The answer is B. Boron

The number of electrons and protons are always the same in an atom.
There are 5 electrons which means there are also 5 protons.
The number of Protons determines the atomic number of an element.
Since the element has 5 protons its atomic number is 5, the same atomic number as Boron
8 0
3 years ago
Read 2 more answers
Calculate the percent by mass of water is Copper (II) Fluoride tetra hydrate. You must show all of your work to earn credit. Ato
lara [203]

Answer:

41.4%

Explanation:

The salt copper II fluoride tetrahydrate is a hydrated salt. A hydrated salt is a salt that has some molecules of water of crystalization attached to its structure. The formula of the salt is CuF2.4H2O

The first step is to calculate the molecular mass of the compound as follows

[64 + 2(19) + 4((2×1) + 16)] = [64 + 38 + 72]= 174gmol-1

Mass of water of crystallization= 4((2×1) + 16) = 72 g

Percentage by mass of water of crystallization= 72 / 174 ×100

Percentage by mass of water if crystalization = 41.4%

5 0
3 years ago
Cl2(g) + 2NaBr(aq) 2NaCl(aq) + Br2(l) The reaction given above is a single replacement reaction because: A. one of the reactants
Ivanshal [37]
The answer is C. One item replacing another is a single replacement, but when two items trade places in two separate molecules it’s double replacement.
3 0
3 years ago
Read 2 more answers
Density differences in different materials are able to change the of a wave. A)Amplitude B)Crest C)Speed D)Trough​
Maurinko [17]

Answer:

C. Speed

Explanation:

Density differences in different materials are able to change the speed of a wave.

  • Wave speed is dependent on the frequency and wavelength of a wave.
  • As a wave travels from one medium to another, the speed of the wave changes.
  • Speed of a wave is medium dependent.
  • The denser a medium, the slower the speed of waves will be be.
  • A less dense medium will have waves traveling through faster.
6 0
3 years ago
Read 2 more answers
7. A gas has a volume of 300 mL at 300 mm Hg. What will its volume be if the pressure is changed to 500 mm Hg?​
USPshnik [31]

Answer:

The volume is

<h2>180 mL</h2>

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

<h3>P _{1}  V _{1} = P _{2}V _{2}</h3>

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

<h3>V _{2}  = \frac{P _{1}  V _{1}}{P _{2}  }</h3>

From the question

P1 = 300 mmHg

V1 = 300 mL

P2 = 500 mmHg

Substitute the values into the above formula and solve for the final volume obtained

That's

<h3>V _{2} =  \frac{300 \times 300}{500}  \\  =  \frac{90000}{500}  \\  =  \frac{900}{5}</h3>

We have the final answer as

<h3>180 mL</h3>

Hope this helps you

7 0
4 years ago
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