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nevsk [136]
1 year ago
15

A compound with the empirical formula, ch2, has a molar mass equal to 84.2 g/mol. what is the molecular formula for the compound

?
Chemistry
1 answer:
MatroZZZ [7]1 year ago
7 0
<span>Mass of CH2 = 12 + 2 = 14 g/mol The number of CH2s there are. So since the total mass is 84.2 g/mol. The solution is 84.2/14 = 6.012 thus the answer is 6 There are 6(CH2) So the molecular formula is C6H12</span>
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Which statement best describes how electrons fill orbitals in the periodic table? Electrons fill orbitals in order of their incr
Stolb23 [73]
Electrons fill orbitals in order of increasing energy from left to right. As the group number increase also the number of valence electorns of each group will increases
5 0
2 years ago
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How did knowing the number of valence electrons in one of the alien elements help to identify it? Explain how the table was used
lawyer [7]
Knowing the number of valence electrons in one of the alien elements helps in identifying it because the number of valence electrons can help categorize the alien element. Similar elements have the same valence electrons and knowing the category of the element can help further analyze the element.
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2 years ago
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How many miles of Fe2+ ions and MnO4- ions were titrated in each part 1 trial
Fudgin [204]

Answer:

In 1000 ml there is 0.10 moles of Fe 2+

Therefore, in 10 ml there is (0.1/1000)*10= 0.001 mol of Fe2+

mole ratio for rxn Fe2+ : MnO4- is

1 : 2

therefore if 0.001 moles of Fe2+ react then 0.001*2 =0.002 moles of MnO4- react with Fe2+

hence, molarity of MnO4- = (mol*vol)/1000

= 0.002*10.75/1000= 2.15*10-5M

Explanation:

Hope this helps

5 0
2 years ago
Identify the Lewis acids and Lewis bases in the following reactions:
postnew [5]

Answer: 1. H^++OH^-\rightarrow H_2O  Lewis acid : H^+, Lewis base : OH^-

2. Cl^-+BCl_3\rightarrow BCl_4^- Lewis acid : BCl_3, Lewis base : Cl^-

3. K^++6H_2O\rightarrow K(H_2O)_6 Lewis acid : K^+, Lewis base : H_2O

Explanation:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

1. H^++OH^-\rightarrow H_2O

As H^+ gained electrons to complete its octet. Thus it acts as lewis acid.OH^- acts as lewis base as it donates lone pair of electrons to electron deficient specie H^+.

2. Cl^-+BCl_3\rightarrow BCl_4^-

As BCl_3 is short of two electrons to complete its octet. Thus it acts as lewis acid. Cl^- acts as lewis base as it donates lone pair of electrons to electron deficient specie BCl_3.

3. K^++6H_2O\rightarrow K(H_2O)_6

As K^+ is short of electrons to complete its octet. Thus it acts as lewis acid. H_2O acts as lewis base as it donates lone pair of electrons to electron deficient specie K^+.

8 0
2 years ago
a student adds 3.5 moles of solute to enough water to make a 1500mL solution. what is the concentration?
aksik [14]
<h2>Hello!</h2>

The answer is:

MolarConcentration=\frac{3.5moles}{volume(1.5L)}=2.33molar

<h2>Why?</h2>

Since there is not information about the solute but only its mass, we need to assume that we are calculating the molar concentration of a solution or molarity. So, need to use the following formula:

MolarConcentration=\frac{mass(solute)}{volume(solution)}

Now, we know that the mass of the solute is equal  3.5 moles and the volume is equal to 1500 mL or 1.5L

Then, substituting into the equation, we have:

MolarConcentration=\frac{3.5moles}{1.5L}=2.33molar

Have a nice day!

7 0
1 year ago
Read 2 more answers
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