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3 years ago

List the electron shell and the number of electrons in each shell

Chemistry

2 answers:

iren2701 [21]3 years ago

7 0

2, 8, 8, 16 and 32. They are the electron level le she'll beers and each never represents how much can fit in

dsp733 years ago

6 0

If you are only talking about the first 20 or so elements there is 2 in the first shell, 8 in the second and 8 in the third, but the 3rd shell can hold 18 but for early elements it jumps to the fourth shell after 8

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suppose you mix two colorless liquids together and a green solid settles to the bottom of the container. explain why you might b

Andrew [12]

Because a unexpected color change has taken place also a precipitate was formed

6 0

3 years ago

The concentration of Fe2 in a sample is determined by measuring the absorbance of its complex with ferroxine. The sample, measur

sdas [7]

Answer:

Absorbance of sample solution = 1.21

Absorbance of reagent blank = 0.205

Explanation:

In order to solve this problem we need to keep in mind the Lambert-Beer law, which states:

A = ε*b*C

Where ε is the molar absorption coefficient, b is the length of the cuvette, and C is the concentration.

By looking at the equation above we can see that if ε and C are constant; and b is 5 times higher (5.00 cm vs 1.00 cm) then the absorbance will be 5 times higher as well:

Absorbance of sample solution = 0.242 * 5 = 1.21

Absorbance of reagent blank = 0.041 * 5 = 0.205

8 0

3 years ago

Honors Stoichiometry Activity Worksheet

vaieri [72.5K]

Explanation: Here, we will be considering 1 cup is equal to 1 mol.

2 water + sugar + lemon juice → 4 lemonade

Moles of water present in 946.36 g of water $=\frac{946.36 g}{236.59 g/mol}=4 mol$

Moles of sugar present in 196.86 g of water $=\frac{196.86 g}{225 g/mol}=0.8749 mol$

Moles of lemon juice present in 193.37 g of water $=\frac{193.37 g}{257.83 g/mol}=0.7499 mol$

Moles of lemonade in 2050.25 g of water $=\frac{2050.25 g}{719.42 g/mol}=2.8498 mol$

As we can see that number of moles of lemon juice are limited.

So, we will consider the reaction will complete in accordance with moles of lemon juice.

1 mole lemon juice reacts with 2 mol of water,then 0.7499 mol of lemon juice will react with:

$\frac{2}{1}\times 0.7499 mol = 1.4998 mol$ of water

Mass of water used = 1.4998 mol × 236.59 g/mol=354.8376 g

Water remained unused = 946.36 g - 354.8376 g =591.5223 g

1 mole lemon juice reacts with mol of sugar,then 0.7499 mol of lemon juice will react with:

$\frac{1}{1}\times 0.7499 mol = 0.7499 mol$ of water

Mass of sugar used = 0.7499 mol × 225 g/mol = 168.7275 g

Sugar remained unused = 196.86 g - 28.1325 g

1 mole of lemon juice gives 4 moles of lemonade.

Then 0.7499 mol of lemon juice will give:

$\frac{4}{1}\times 0.7499 mol=2.996 mol$ of lemonade

Mass of lemonade obtained = 2.996 mol × 719.42 g/mol = 2157.9722 g

Theoretical yield of lemonade = 2157.9722 g

Experimental yield of lemonade = 2050.25 g

Percentage yield of lemonade:

$\frac{\text{Experimental yield}}{\text{theoretical yield}}\times 100$

$\frac{2050.25 g}{2157.9722 g}\times 100=95.00\%$

The percentage yield of lemonade is 95% and ingredient which remained unused were water and sugar.

6 0

4 years ago

What kind of water is required for photosynthesis to occur?

Delvig [45]

Solar Energy is the answer

5 0

4 years ago

Read 2 more answers

Isomers of hydrocarbons have the same _______formula but different ____formula.

Misha Larkins [42]

Answer:

Isomers of hydrocarbons have the molecular formula but structural formula.

Explanation:

Molecules with the same structural formula, but different molecular geometries (spatial arrangement) are called isomers. These differences in the arrangement of the various atoms confer certain differences in chemical properties to the resulting hydrocarbons, even though their chemical composition is the same. There are two types of isomers:

Structural isomers: Here, each atom are connected or bonded in different ways, hence structural isomers may contain different functional groups or pattern of bonding. structural isomers are further divided into: chain, position, and functional group isomers.

Stereoisomers: Here, the connections of the atoms are the same, but the difference is in their orientation in space

6 0

3 years ago