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Alex787 [66]
3 years ago
9

Which shape is a pallelogram with 4 right angel​

Chemistry
1 answer:
Zepler [3.9K]3 years ago
8 0

A figure may be called a parallelogram if it has two pairs of equal, parallel sides. Therefore, a square can be called a parallelogram- as a square has two pairs of equal, parallel sides. (A square also has 4 right angles)

Therefore, the answer is square.

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The atomic mass is the sum of the number of ________ and ________ in the nucleus of an atom. Choose two answers from the options
iVinArrow [24]

Answer :

The atomic mass is the sum of the number of protons and neutrons in the nucleus of an atom.

Explanation :

Atomic number : it is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number or atomic mass : It is defined as the sum of the number of protons and the number of neutrons.

Mass number or atomic mass = Number of protons + Number of neutrons

For example :

Number of protons in carbon = 6

Number of neutrons in carbon = 6

Mass number or atomic mass = Number of protons + Number of neutrons

Mass number or atomic mass = 6 + 6

Mass number or atomic mass = 12

Thus, the atomic mass is the sum of the number of protons and neutrons in the nucleus of an atom.

3 0
3 years ago
Read 2 more answers
The statement "electrons have a negative charge" is true. Select the correct evidence scientist have that proves this statement
Kryger [21]

The question is incomplete but i will try to offer as much help as i can.

Answer:

See explanation

Explanation:

The electron was discovered by J.J Thompson. His model of the atom was called the plum-pudding model of the atom.

He discovered that cathode rays being negatively charged particles were deflected by a magnet in just the same way as moving, negative electrically charged particles.

Similarly, in an electric field, they are deflected towards the positive plate of the electrostatic field which shows that they are negatively charged.

3 0
3 years ago
If log x = -0.761. What does x equal
kvasek [131]
The logarithm from my understanding can never be negative. You can check this on a calculator. You may have a negative if it is shown as -(log x).
4 0
3 years ago
What is the most important change in a chemical change?
avanturin [10]
5) state
when the state of the chemical changes that is the most important 
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3 years ago
Discuss on the law of corresponding states​
sukhopar [10]

Answer: The law of corresponding states is an empirical law according to which the equations of states for real gases are similar when these gases are expressed in reduced temperature, pressures, and volumes at critical point.

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3 years ago
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