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joja [24]
3 years ago
8

In the following diagram, the counter-clockwise torque is equal to Please help

Chemistry
1 answer:
vichka [17]3 years ago
6 0

Answer:

where is diagram, attach diagram

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How are new kinds of matter formed in a chemial change?
shtirl [24]
Because the reactants react with each other and chemically react to produce a different product like with fire when it reacts with the wood it burns and the product left behind is a new different substance from the reactants in this case the product is ash
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3 years ago
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Two substances, A and Z, are to be identified. Substance A can not be broken down by a chemical change. Substance Z can be broke
Kisachek [45]

Answer;

(3) Substance A is an element and substance Z is a compound.

Explanation;

-A compound is a substance formed when two or more chemical elements are chemically bonded together, such as water, carbon dioxide, methane, etc while an element is a pure chemical substance made of same type of atoms, such includes, oxygen, potassium, hydrogen, carbon, etc.

- Compounds can be broken down or decomposed into simpler substances: elements cannot be broken down chemically into simpler substances .

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3 years ago
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What is the weight, on Earth, of a book with a mass of 16 kg?<br> 16N<br> 65N<br> 113N<br> 147N
AnnyKZ [126]
The weight on earth of a book with a mass of 16 kg will be 65N
6 0
3 years ago
What is the ending of the electron configuration of each element in group 4?
bogdanovich [222]
<span>because p6 will be the group 8. You have to count the 2 electrons from the "s" block that are Group I and Group II Group I s1 Group II s2 Group III s2 p1 Group IV s2 p2 Group V s2 p3 Group VI s2 p4 Group VII s2 p5 Group VIII s2 p6</span>
6 0
3 years ago
Examine the following isotopes of silicon (Si).
Vesnalui [34]

Answer:

They all have the same number of protons but different numbers of neutrons.

Explanation:

These are called isotopes. 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.

The atomic number is the number of protons in an atom. For a neutral atom, it is the same as the number of electrons.

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

silicon-28 (28Si)

silicon-29 (29Si)

silicon-30 (30Si)

All of these isotopes have an atomic number of 16

Now let us chech for the neutrons:

 Number of neutrons = mass number - atomic number:

for silicon-28 (28Si)  : 28-16 = 12 neutrons

     silicon-29 (29Si) :   29-16 = 13 neutrons

     silicon-30 (30Si):    20-16 = 14 neutrons.

6 0
3 years ago
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