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3 years ago

Plz help me.....im new here

Chemistry

2 answers:

BabaBlast [244]3 years ago

5 0

Answer:

<h2>Option 3rd</h2>

Fe2S3

Explanation:

As, the ionic valency of Iron (Fe) that is + 3 interchanges with the ionic valency of Sulphide that is - 2 to form-

Fe2S3

yan [13]3 years ago

3 0

Answer:

Fe2S3

Explanation:

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You apply 100.0 of force to a machine. The machine applies 20.0 N of force to the load. What is the mechanical advantage of the

rjkz [21]

MA= output force/input force
MA= 100N/20N
MA= 50

5 0

3 years ago

The element carbon exists in several different forms. Pure carbon can be found in the form of diamonds, coal, and the graphite i

UNO [17]

Answer:

B) All carbon atoms have 6 neutrons.

Explanation:

The false statement from the given choices is that all carbon atoms have 6 neutrons.

There is a phenomenon called isotopy in chemistry.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

These atoms of elements are called isotopes.
Carbon atoms generally have proton number of 6 which is the same as the atomic number.
As with all atoms, the mass number or atomic mass equals the number of protons and neutrons.

For the isotopes of carbon, their number of neutrons differs.

For example:

¹²₆C ¹³₆C ¹⁴₆C

The number of neutrons differs in the above isotopes.

Number of neutrons = mass number - atomic number;

¹²₆C , number of neutrons = 12 - 6 = 6

¹³₆C, number of neutrons = 13 - 6 = 7

¹⁴₆C, number of neutrons = 14 - 6 = 8

Therefore, based on the concept of isotopy, all carbon atoms do not have 6 neutrons.

7 0

2 years ago

1. define speed

Harrizon [31]

1- thé everyday use of kinematic basically the speed for something it’s the magnitude.

2-the speed of something in a certain direction
2a- They are both related by speed.

3-the capacity of a vehicle which gains speed in a short time

4-it’s an attraction of all matter (not sure on this one)

5 0

2 years ago

What would A be? HELP ASAP

Minchanka [31]

Si has 4 available elections. Each Cl has 7.
7 x 4 = 28 + the 4 from your Si gives the total of 32 total electrons.

6 0

2 years ago

Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of

Brut [27]

Answer: The smallest temperature change is shown by water.

Explanation:

To calculate the heat absorbed or released, we use the equation: