Chemistry Middle School

In each of the following cases, give the number or the element symbol represented by X.

40 18 X
X 20 Ca
31 X P

Answers

Answer 1

Answer:

X20 Can it is answer for this question

Answer 2
1) Ar, argon
2) 40
3) 15

Related Questions

How do you put this in your own words-

This amount depends on the latitude of the area. Latitude is the angular distance in degrees north and south from the equator. Different latitudes receive different amounts of solar energy.

Answers

I'm not the best at this but I hope this helps!

The value relies upon the latitude of the range. Different latitudes draw different amounts of energy from the sun because they are measured from North to the South of the equator.
This value can vary depending on the latitude of the area. The definition of latitude is the angular distance in degrees north and south from the equator. Different latitudes get different quantities of solar power.

Please help me out with this question if you help me I will give you the brain thing and extra points. 5/9 image below.

Answers

Answer:

Third Law of motion. (answer C)

Explanation:

This is an example of Newton's Third Law of motion which normally translates into Action/Reaction. That is : the expelled air exerts a force in the direction opposite to that of the motion of the air that goes out. It is the same as propulsion in a rocket.

yeah what they said^

Dont answer if you dont know What is a difference between complete metamorphosis and incomplete metamorphosis?


Complete metamorphosis has 3 stages and incomplete metamorphosis has 4 stages.


Only complete metamorphosis has the nymph stage.


Complete metamorphosis has a larva and pupa stage.


Only insects that undergo complete metamorphosis can fly.

Answers

Answer:

The differences between complete and incomplete metamorphosis are many. Complete metamorphosis has 4 distinct stages: egg, larva, pupa, and adult. Incomplete metamorphosis has 3 distinct stages: egg, nymph, and adult.

Two brothers are participating in a race. The older brother's average speed is 6 miles per hour and he finishes the race in 1 hour and 20 minutes. If the younger brother's average speed is 4 miles per hour, how long will it take him to complete the race?

A.) 45 min

B.) 2 Hours

C.) 4 Hours

D.) 30 min

Answers

B). 2 Hours
Explanation if the older brother can run 6 MPH and it’s takes him a hour and twenty minutes you automatically can say it’s at least 6 miles then you have to see how many he can run in 20 minutes which is roughly 2 miles so that would mean he run for 8 miles if the younger brother can run 4 MPH then you just have to add that by 2 too see how long it will take to run 8
The answer is 45 for this just plug in your variables to the equation

ok yall l have to write a essay about Pretend that you are the moon. What would you say? Describe yourself to others based on what you have learned about the moon in class. How does your surface reflect light? Do you always look the same? How long does it take you to revolve around the Earth? Do you have an axis like the Earth? Where do you go during the day? What would you see in space?
can yall do it for me

Answers

Answer:

       If I was the moon, I would say that space is amazing. Past the years, I had been walked on by many people. I think they are called astronauts. The first person that put their feet on me was Neil Armstrong. He had a white thick coat and a helmet. I had been flagged by Buzz Aldrin but, the flag been flat on the ground since the moment Aldrin and Neil Armstrong lifted off. I couldn't do anything about it but, that flag made me feel special. I remember that the flag had about 50 white stars on the corner, in the corner was filled with blue where the stars were, red, white stripes. I shine because my surface reflects light from my friend, the sun. Many people ask me, "Do you always look the same?" No, everyone sees the same phases of me, the moon. I go through a process called moon phases. They are first Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent, New Moon. I rotate on my axis. One rotation takes nearly as much time as one revolution around Earth I believe. During the day, I go the the other side of the earth, where the Earth's shadow is. Honestly, I enjoy being the moon. It's fun and I enjoy the white little twinkling stars beside me. I like seeing that little world move.

hey i need help on this for science

Answers

Answer:

Reactants: sunlight, oxygen, carbon dioxide

porducts:water, glucose

Explanation:

Brass is an alloy of copper and zinc. Bronze is an alloy of copper and tin. Alloys are commonly used in manufactured items because the properties of these metal mixtures are often superior to a pure metal.

Answers

Answer:

Correct, in structures of material you can calculate youngs modulus and the module of elastics and rigidity to calculate breaking points as well as structural integrity.I do quizzes and exams if your interested:)

Question 1: A measure of the amount of matter in an object


Question 2: the force or speed with which something moves


1.momentum
2.collision
3.exert
4.mass
5.velocity

Answers

Answer:

question one is mass and question two is velocity

Now explain your diagnosis. Start your argument by writing something like this: "My group believes that Elisa has/does not have ___. I think that she does/does not have the ___ condition because . . ." (Then, explain how molecules move through the body when someone has the condition you investigated, and compare that to Elisa's test results.) plz help me ;(

Answers

Answer:

Explanation:I would need more info to understand this question but explaining molecules is pretty easy tho

How is a gas different from a solid or liquid (if you insert JUST AN ANSWER without ANY explanation, I will not except.)
a. a gas is made up of tiny particles
b. a gas has volume
c. a gas expands to fill the container
d. a gas has density

Answers

The correct answer is C.

Because, first, solids only take up space if’s large enough to take up all the space. Second, liquids only take up space if it has enough liquid to take the space of the container. And, lastly, gas is take up space because, it expands & it will keep expanding until it filled up everything in the container

You’re welcome :)
Maybe the answer is C

PS: Sorry if I’m wrong
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