All categories

3 years ago

How many valence electrons does potassium have?

1 answer:

7 0

The only difference is the total number of shells they have. So, to answer the question again. Potassium (K) typically has 19 total electrons, 1 of which is in the outermost shell, and therefore 1 valence electron.

Does that help???

You might be interested in

How many molecules of water will be produced if 52.6 g of methane are burned?

liraira [26]

B there thanksgiving

7 0

4 years ago

When oxygen accepts electrons, water is produced as a byproduct. a. True b. False?

scZoUnD [109]

The answer is true. oxygen, the terminal electron acceptor, and water is formed as the product. pass through special proton channel proteins called ATP synthase. Arrange the following electron acceptors in the proper order in which they participate in electron transport. When oxygen accepts electrons, water is produced as a byproduct.

5 0

4 years ago

What volume of 0.200 M ethanol solution contains each of the following amounts?

Papessa [141]

Answer:

A. 2.3 L

B. 6.10 L

C. 0.060 L

Explanation:

The question asks the volume of a 0.200 M solution of ethanol that contains certain number of moles of ethanol.

The M in the 0.200 M stands for Molarity. This is a unit of concentration that can be expressed as:

Molarity = moles of solute / Liters of solution

In this case:

0.200 M = moles of ethanol / Liters of solution

So from the formula we can get that we can calculate the volume of the solution, as Liters of solution, given the moles in each case as:

Liters of solution = moles of ethanol / 0.200 moles/L

_______________________________________________

A. 0.45 mol ethanol

Liters of solution = 0.45 moles / 0.200 moles/L = 2.25 L = 2.3 L

B. 1.22 mol ethanol

Liters of solution = 1.22 moles / 0.200 moles/L = 6.10 L

C. 1.2 x 10⁻² mol ethanol

Liters of solution = 1.2 x 10⁻² moles / 0.200 moles/L = 0.060 L

_______________________________________________

Note: Each answer is given with the correct number of significant figures which results from the least number of significant figures in the given used values in each calculation.

7 0

3 years ago

Covalent compound formula for hydrogen monochloride

Wittaler [7]

Answer:

HCl

Explanation:

1 hydrogen 1 chlorine

5 0

3 years ago

What precipitate forms when silver nitrate and potassium chromate solutions are mixed? Explain.

weeeeeb [17]

Answer: a. $Ag_2CrO_4( s)$

Explanation:

$2AgNO_3(aq)+K_2CrO_4(aq)\rightarrow Ag_2CrO_4(s)+2KNO_3(aq)$

When silver nitrate $AgNO_3$ combines with potassium chromate $K_2CrO_4(aq)$ ,they undergo double displacement reaction in which exchange of ions take place.

The products formed are silver chromate $Ag_2CrO_4$ which is insoluble in water and thus formed as precipitate and potassium nitrate $KNO_3(aq)$ is soluble in water.

3 0

4 years ago