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worty [1.4K]
3 years ago
5

What does Element mean?

Chemistry
1 answer:
Mariana [72]3 years ago
7 0

Answer:

C is the answer I believe.

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⚠️!!!50 POINTS FOR RIGHT ANWSERS!!!⚠️
elena-s [515]
D and C your welcome bro
5 0
3 years ago
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To what volume (in milliliters) should you dilute 100.0 mL of a 5.50 M solution of CaCl2 solution to obtain a 0.950 M solution o
Alexxx [7]

Dilution law is given as:

M_{1}V_{1}=M_{2}V_{2}    (1)

where, M_{1} = molarity of initial concentrated solution.

V_{1} = volume of initial concentrated solution.

M_{2} = molarity of final diluted solution.

tex]V_{2}[/tex] = volume of final diluted solution.

Volume of initial concentrated solution of CaCl_{2}= 100.0 mL

Molarity of initial concentrated solution of CaCl_{2}= 5.50 M

Volume of final diluted solution of CaCl_{2} = 0.950 M

Put the values in formula (1),

5.50 M\times 100.0 mL=0.950 M\times V_{2}

V_{2} =\frac{5.50 M\times 100.0 mL}{0.950 M}

V_{2} =578.9 mL

Hence, final diluted volume of the solution is  578.9 mL.





3 0
4 years ago
How is the atomic number related to core electrons?
Bas_tet [7]

Answer:

Core electrons are the electrons in an atom that are not valence electrons and therefore do not participate in bonding. The number of valence electrons of an element can be determined by the periodic table group of the element

Explanation:

4 0
4 years ago
What is an example of a chemical bond
KatRina [158]
Sodium Chloride or NaCl is a ionic bond
3 0
3 years ago
How many moles of o2 are required for the complete reaction of 54.7 g of c2h4 to form co2 and h2o?
Hunter-Best [27]
The balanced chemical equation that illustrates this reaction is:
<span>C2H4 + 3O2 --> 2CO2 + 2H2O 
</span>
From the periodic table:
mass of carbon = 12 grams
mass of hydrogen = 1 gram
Therefore:
molar mass of C2H4 = 12(2) + 4(1) = 24 + 4 = 28 grams

number of moles = mass / molar mass
number of moles of C2H4 = 54.7 / 28 = 1.95 moles

From the balanced equation above:
3 moles of oxygen are required to react with one mole of C2H4, therefore, to know the number of moles required to react with 1.95 moles of C2H4, all you have to do is cross multiplication as follows:
number of oxygen moles = (1.95*3) / 1 = 5.85 moles
4 0
3 years ago
Read 2 more answers
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