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3 years ago

The metalloid that has three valence electrons is?

Chemistry

2 answers:

bezimeni [28]3 years ago

8 0

The metalloid that has three valence electrons is Boron~

ad-work [718]3 years ago

4 0

Answer:

The metalloid that has three valence electrons is Boron~

Explanation:

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3 years ago

Solution A has a concentration of 3 M. If solution B is 5 times more concentrated than A what is it’s concentration?

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3 years ago

What quantity of potassium phosphate, in grams, is required to prepare 500.0 ml of solution where you the concentration of potas

Readme [11.4K]

Answer: 3.54

Explanation:

You're forgetting to divide by 3 for the 3 moles of potassium that are in potassium phosphate.

Potassium Phosphate= K3PO4

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3 years ago

Lipids (also known as fats) have two types of monomers called

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2 years ago

What is the concentration (in M) of a 225ml potassium sulfate solution that contains 4.15g of potassium?

mars1129 [50]

The concentration of solution in M or mol/L can be calculated using the following formula:

$C=\frac{n}{V}$ .... (1)

Here, n is number of moles and V is volume of solution in L.

The molecular formula of potassium sulfate is $K_{2}SO_{4}$ thus, there are 2 moles of potassium in 1 mol of potassium sulfate.

1 mol of potassium will be there in 0.5 mol of potassium sulfate.

Mass of potassium is 4.15 g, molar mass is 39.1 g/mol.

Number of moles can be calculated as follows:

$n=\frac{m}{M}$

Here, m is mass and M is molar mass

Putting the values,

$n=\frac{(4.15 g}{(39.1 g/mol}=0.1061 mol$

Thus, number of moles of $K_{2}SO_{4}$ will be $0.1061\times 0.5=0.053 mol$ .

The volume of solution is 225 mL, converting this into L,

$1 mL=10^{-3}L$

Thus,

$225 mL=0.225 L$

Putting the values in equation (1),

$C=\frac{(0.053 mol}{0.225 L}=0.236 M$

Therefore, concentration of potassium sulfate solution is 0.236 M.

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3 years ago