What is the expression of the chemical composition of a compound?

Answers

Answer 1
Answer: The correct answer is the chemical formula. The chemical formula is the expression of the chemical composition of a compound. It is the way of expressing the details about the atoms' proportion that constitutes a specific chemical compound.

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What happens to the temperature of a substance during a phase change?a. The temperature increases.
b. The temperature decreases.
c. The temperature remains constant.
d. The temperature fluctuates randomly.

Answers

during a phase change, the temperature remains constant. obviously all the heat is used in phase transformation.

Answer:

THE TEMPERATURE DECREASES

Explanation:

the clouds reflect the suns rays so the go away therefore making it less hot

A man’s mass is 100 pounds on Earth. His weight is 445N. What would change if this man were on the moon? A) His mass
B) His weight
C) His weight and mass
D) Neither the mass or the weight

Answers

Answer: B) weight

Explanation: Your mass does not change on the moon

Doc Brown has calculated his Delorean can accelerate at a rate of 2.52 m/s/s. Howfar away must he and Marty stand to allow the car to accelerate from rest to a speed
of 39.2 m/s?

Answers

Answer:

304.89m

Explanation:

Given

acceleration a = 2.52m/s²

final speed v = 39.2m/s

initial speed = 0m/s (car accelerates from rest)

Using the equation of motion below to get the distance of Doc brown from Marty;

v² = u²+2as

substitute the given parameters

39.2² = 0²+2(2.52)s

1536.64 = 0+5.04s

divide both sides by 5.04

1536.64/5.04 = 5.04s/5.04

rearrange the equation

5.04s/5.04 = 1536.64/5.04

s = 304.89m

Hence He and Marty must stand at 304.89m to allow the car to accelerate from rest to a speed  of 39.2 m/s?

What is the capital of prince edward island

Answers

Answer:

The capital of Prince Edward Island is Charlottetown.

Explanation:

hope this helps, and if it did, please mark brainliest :)

What's the formula to find out power

Answers


In general, 

                 Power = (energy moved) / (time to move the energy) .

If it's mechanical power, then     

                 Power = (work done) / (time to do the work) .

If it's electrical power, then it can be any one of these:

                 Power  =  (volts)  x  (amperes)

                 Power  =  (volts)²  /  (resistance, ohms)

                 Power  =  (amperes)²  x  (resistance, ohms) .

Whatever kind of energy you're dealing with, power always
turns out to be

                  (amount of energy produced, used, or moved)
divided by
                  (time taken to produce, use, or move the energy) .          

What is true of a mechanical wave? @3.2.P.B5 @1A)
It must travel in a vacuum


B)
It must have a medium.


C)
It must travel in empty space.


D)
Both sound and light are examples

Answers

I think it is B. Mechanical waves carry energy through a medium. 
It should be definitely B