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yuradex [85]
3 years ago
8

2) Which of the following statements best describes an element?

Chemistry
2 answers:
KiRa [710]3 years ago
7 0

Answer:

The correct answer is <u><em>E) a material consisting of only one type of atom .</em></u>

Explanation:

A chemical element is called a substance that is formed by atoms of the same type whose nuclei have the same number of protons, called atomic number.

It is considered a chemical element to the simplest form of a substance, therefore it is that substance that cannot be decomposed by a chemical reaction into simpler ones.

The elements combine to form compounds. The chemical behavior of the elements is related to the structure of the nucleus and the configuration of its electrons.

The chemical elements and their characteristics are summarized in what is called a periodic table of the elements, where the elements are arranged in increasing order of atomic number.

Finally, <u><em>the correct answer is E) a material consisting of only one type of atom .</em></u>

mixas84 [53]3 years ago
3 0

Answer:

E

Explanation:

The answer woul be E because elements are made of one type of atoms

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AlladinOne [14]

Answer:

It has 3 subshells, it has 9 orbitals, and it has the capacity for 18 electrons

Explanation:

4 0
3 years ago
Carbonic acid reacts with water to yield bicarbonate ions and hydronium ions: h2co3+h2o?hco3?+h3o+ identify the conjugate acid-b
Levart [38]
Conjugate base pairs are acid and bases having common features. These features are the equal gain or loss of protons of the pairs. Conjugate pairs should always be one base and one acid. One would not exist without the other. Conjugate acids are the substances that gains protons while conjugates bases are those that loses protons. <span>The substances in the equilibrium reaction that is given is identified as follows: 
HCO3^-      +     H2O <----->   CO3^2-          +             H3O^+ 
 acid                   base         conjugate base           conjugate acid 

HCO3^- ion is an intermediate molecule of CO2 and CO3^2-. When we add OH- to HCO3^-, we produce CO3^2-. And when we add H+ to HCO3, we produce CO2. </span>
7 0
3 years ago
How are the shape of sand dunes determined?using one word
SVEN [57.7K]
"windweathered" because the use of wind weathering would bring the sand all around and it would be wind weathered
8 0
3 years ago
The temperature of a sample of water changes from 10°C to 20°C when the water absorbs 100 calories of heat. What is the mass of
Vlad1618 [11]

Answer:

10 g

Explanation:

Right from the start, just by inspecting the values given, you can say that the answer will be  

10 g

.

Now, here's what that is the case.

As you know, a substance's specific heat tells you how much heat is needed to increase the temperature of  

1 g

of that substance by  

1

∘

C

.

Water has a specific heat of approximately  

4.18

J

g

∘

C

. This tells you that in order to increase the temperature of  

1 g

of water by  

1

∘

C

, you need to provide  

4.18 J

of heat.

Now, how much heat would be required to increase the temperature of  

1 g

of water by  

10

∘

C

?

Well, you'd need  

4.18 J

to increase it by  

1

∘

C

, another  

4.18 J

to increase it by another  

1

∘

C

, and so on. This means that you'd need

4.18 J

×

10

=

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

.

Now look at the value given to you. If you need  

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

, what mass of water would require  

10

times as much heat to increase its temperature by  

10

∘

C

?

1 g

×

10

=

10 g

And that's your answer.

Mathematically, you can calculate this by using the equation

q

=

m

⋅

c

⋅

Δ

T

 

, where

q

- heat absorbed/lost

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as final temperature minus initial temperature

Plug in your values to get

418

J

=

m

⋅

4.18

J

g

∘

C

⋅

(

20

−

10

)

∘

C

m

=

418

4.18

⋅

10

=

10 g

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3 years ago
1. Lab Investigator: Chemical Reactions cannot be used for
Elina [12.6K]

1: viewing any chemical reaction in a laboratory

2: dangerous to look at when it burns & used in photography, fireworks, and flares

3: the product

3 0
3 years ago
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