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babymother [125]
3 years ago
6

Calculate the percent by mass of carbon in CO2 (carbon dioxide).

Chemistry
2 answers:
Lady_Fox [76]3 years ago
5 0

Answer:

Explanation:

% by mass of C = (mass of C/mass of CO2) X 100%

mass of C = 12

mass of CO2 = 12 + (16X2)

                      = 12 + 32

                      = 44

% by mass of C = (12/44) X 100% =27.2%

FromTheMoon [43]3 years ago
4 0

Answer:

The answer to your question is 27.3 %

Explanation:

Percent by mass = ?

Process

1.- Calculate the atomic mass of carbon using the periodic table

Atomic mass = 12g

2.- Calculate the molecular mass of CO₂.

Carbon = 12

Oxygen = 16 x 2 = 32

Total = 12 + 32 = 44g

3.- Calculate the percent by mass of carbon using proportions

                          44g -------------------- 100%

                           12 g -------------------  x

                            x = (12 x 100) / 44

                            x = 1200 / 44

                            x = 27.3 %

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Klio2033 [76]

false because like dissolves like

non polar will dissolve non polar

polar will dissolve polar

7 0
3 years ago
The sodium isotope with 13 neutrons. Express your answer as an isotope
wariber [46]

Answer:

          \large\boxed{\large\boxed{^{24}_{11}Na}}

Explanation:

The question is asking to write the <em>isotopic symbol </em>of the form ^A_ZX for the <em>sodium isotope with 13 neutrons</em>.

In general, the isotopic symbol in the given form shows:

  • The element's chemical symbol: X

  • A: mass number of the isotope, written as a superscript to the left of the element's simbol, and

        A = number of protons + number of neutrons

  • Z: atomic number of the isotope, written as a subscript to the left of the elements's symbol,

        Z = number of protons

The atomic symbol of sodium is Na.

The atomic number, or number of protons, is the same for every isotope of the element, and you can find it in any periodic table. Tha atomic number of sodium is 11. Thus:

  • Z = 11

The mass number is the number of protons plus neutrons, hence:

  • A = 11 + 13 = 24

Now you can write the isotope symbol for the sodium isotope with 13 neutrons:

         ^{24}_{11}Na

6 0
3 years ago
How do i find a ionic formula? <br><br>for example Ca2+ &amp; S2-​
jeka94

Example #1 write the chemical formula for Calcium Oxide

Step 1

-Find the Atomic symbol of the metal and non-metal on the periodic table

CaO

Step 2

Find the charges for Calcium and Oxygen

which are Ca 2+ and O 2-

Step 3

Balance out the charges

They are already balanced out

Here´s the chemical formula for Calcium Oxide

CaO

Example 2 write the chemical formula for Aluminum Oxide

Step 1

-Find the Atomic symbol of the metal and non-metal on the periodic table

A

l

O

Step 2

Find the charges for Aluminum and Oxygen

Which are Al 3+ and O 2-

Step 3

Balance out the charges

You need 2 Aluminum and 3 Oxygen to balance the charges

Al 3+ O 2-

Al 3+ O 2-

= 6 + O 2-

= 6-

Step 4

If you need more then one element to balance out the charges you identify that by using subscripts

Heres your chemical formula for Aluminum Oxide

Al_{2} O_{3}

8 0
2 years ago
MATCH
almond37 [142]
I wanna say it would be 1 would be A 2 would be C 3 would be D 4 would be B and 5 would be E



hope this helps
6 0
3 years ago
Read 2 more answers
2.(04.01 LC)
Mila [183]

Answer:

2KClO3 —> 2KCl + 3O2

The coefficients are 2, 2, 3

Explanation:

From the question given above, we obtained the following equation:

KClO3 —> 2KCl + 3O2

The above equation can be balance as follow:

There are 2 atoms of K on the right side and 1 atom on the left side. It can be balance by putting 2 in front of KClO3 as shown below:

2KClO3 —> 2KCl + 3O2

Now, the equation is balanced.

Thus, the coefficients are 2, 2, 3

8 0
2 years ago
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