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2 years ago

What is the valence shell electronic configuration of Alkali Metals , Alkaline Earth Metals, Halogens and Noble Gases?

Chemistry

2 answers:

RideAnS [48]2 years ago

4 0

Answer:

Alkali Metals: 1 valence electron

Alkaline Earth metals: 2 valence electrons

Halogens: 7 Valence electron

Noble Gases: 8 Valence electrons

alisha [4.7K]2 years ago

3 0

Answer:

alkali metals: 1

alkaline earth metals: 2

Halogens: 7

noble gases : 8

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What is the lewis structure for HCL + Na?

saul85 [17]

Answer:

Explanation: that is .....

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2 years ago

After distilling your crude methyl benzoate, you set aside 4.83 grams of the purified ester. You then prepare the grignard reage

Ber [7]

Answer:

95.6 %

Explanation:

For this question, we will have 2 reactions, the formation of the grignard reagent and the formation of the alcohol. The first step then is the calculation of the maximum amount of the grignard reagent. For this, we have to convert the grams to moles and check the smallest value. To do this we have to take into account the following conversion ratios:

Molar mass of Mg = 24 g/mol

Molar mass of phenylmagnesium bromide ( $C_6H_5Br$ )= 157 g/mol

Density of bromobenzene= 1.5 g/mL

Molar ratio between Mg and $C_6H_5Br$ = 1:1

$2.3~g~Mg\frac{1~mol~Mg}{24~g~Mg}=0.096~mol~Mg$

$9.45~mL~\frac{1g}{1.5mL}\frac{1~mol~C_6H_5Br}{157~g}=0.0402~mol~C_6H_5Br$

The smallest value is the mol of bromobenzene therefore 0.0402 mol of phenylmagnesium bromide would be produced.

The next step is repite the same steps for the reaction of formation of the alcohol. Therefore we have to find the moles of methyl benzoate, so:

Molar mass of methyl benzoate: 136.14 g/mol

$4.83~g~\frac{1~mol}{136.14~g}=0.35~mol$

The we have to divide by the coefficient of each reactive in the balance reaction. So:

$\frac{0.35~mol}{1}=0.35$

$\frac{0.0402~mol}{2}=0.0201$

Therefore the limiting reagent would be the phenylmagnesium bromide. Now, the molar ratio between the phenylmagnesium bromide and triphenyl carbinol is 2:1, so the amount of alcohol produced is 0.0201 mol triphenyl carbinol. The next step is the conversion from mol to grams of triphenyl carbinol:

Molar mass of triphenyl carbinol= 260.33 g/mol

$0.0201~mol\frac{260.33~g}{1~mol}=5.23~g~triphenyl carbinol$

Finally, we have to divide the obtanied solid by the calculated one:

$Percentage=\frac{5}{5.23}*100=95.6\%$

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3 years ago

According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational fo

Alika [10]

The answer is C. Because planet A experiences a stronger gravitational field, it will have a larger acceleration due to gravity, and therefor orbit faster than planet B

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2 years ago

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A 7.74 L balloon is filled with water at 3.88 atm. If the balloon is squeezed into a 0.23 L beaker and does NOT burst, what is t

Vladimir [108]

Answer:

131 atm

Explanation:

To find the new pressure, you need to use Boyle's Law:

P₁V₁ = P₂V₂

In this equation, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You can find the new pressure (P₂) by plugging the given values into equation and simplifying.

P₁ = 3.88 atm P₂ = ? atm

V₁ = 7.74 L V₂ = 0.23 L

P₁V₁ = P₂V₂ <----- Boyle's Law

(3.88 atm)(7.74 L) = P₂(0.23 L) <----- Insert values

30.0312 = P₂(0.23 L) <----- Simplify left side

131 = P₂ <----- Divide both sides by 0.23

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1 year ago

Sulfur is an element that can be seen on the periodic table. What will most likely occur if sulfur forms an ionic bond with anot

Yakvenalex [24]

What is likely to occur if sulfur forms an ionic bond with another element is sulfur will accept electrons

explanation

Ionic bond is formed when a metal react with a non metal.

Metal loses ( donate) electrons to form cation ( a positively charged ion) , while non metal accept (gain) electrons to form anion ( a negatively charged ion ).

Sulfur is a non metal therefore it accept electrons if it form an ionic bond with a metal. sulfur accept 2 electrons to form S2- ion

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2 years ago

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