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IceJOKER [234]
3 years ago
6

What is the empirical formula for a compound that is 69.8% Fe and 30.2% 0?

Chemistry
1 answer:
alex41 [277]3 years ago
4 0

Answer:

Fe2O3

Explanation:

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The diagram shows monochromatic light passing through
Maru [420]

Destructive interference in which waves cancel each  other out is depicted in region X,Y and Z.

<u>Explanation:</u>

Interface is the particle property of light waves. When incident light beam is made to pass through holes, the waves will combine either constructively or destructively. Constructive interference means the waves having same phase will get added so they will increase in amplitude. While destructive interference means the waves combining have different phases like crests and troughs. So they undergo decrease or complete vanishing of amplitude.

When waves combine in constructive interference, they form bright white light and when they combine in destructive interference, they form dark black light. So the regions X, Y and Z are shown as dark black colors in the diagram, so these regions represent destructive interference in which waves cancel each  other out.

8 0
3 years ago
A population of Esherichia coli is given time to grow for eight generations. The final population is 1,996,800 cells. What was t
hram777 [196]

Answer:

7800 cells

Explanation:

The number of Escherichia coli cells N after n generations is given by

N = 2ⁿ × N₀ where N₀ = initial population

Now making N₀ subject of the formula, we have

N₀ = N/2ⁿ

Since n = 8 and N = 1,996,800 cells, substituting the values of the variables into the equation, we have

N₀ = N/2ⁿ

N₀ = 1,996,800 cells/2⁸

N₀ = 1,996,800 cells/256

N₀ = 7800 cells

So, the initial population of Escherichia coli cells is 7800 cells.

7 0
3 years ago
Which element is the least reactive, Li, Be, Mg, Na?
Oxana [17]

Answers:

Lithium-Li

Beryllium-Be

Magnesium-Mg

Sodium-Na

4 0
3 years ago
Which examples are indirect evidence used to study Earth's interior? Check all that apply.
ch4aika [34]

<u>Answer</u>:

Indirect evidence used to study Earth's interior are

  • analysis of several seismographs  
  • location of an earthquake's epicentre  
  • identification of seismic wave direction

<u>Explanation</u>:

The earth is mainly divided into 3 layers. These are the crust, mantle and the core. Further, the interior part of the earth cannot be studied directly and the direct evidence explains the composition of rocks.

The seismic waves help with the understanding of indirect evidence. The seismic waves are the energy that travels through different layers of the earth.It is caused due to  volcanoes, earthquakes, landslides etc. Thus, analysis of several seismographs, identifying the direction the of seismic wave and location of earth’s epicentre helps to study earth's interior.  

7 0
4 years ago
Read 2 more answers
D=ut+5 make u the subject
Levart [38]

Explanation:

d=ut+5

d-5=ut

d-5/t=u

!!!!!!!

6 0
3 years ago
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