What is the formula for an ionic compound that is composed of potassium and oxygen?

A white crystalline salt conducts electricity when it is melted and when it dissolves in water.

sergeinik [125]

Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

7 0

3 years ago

What two physical properties depend on the sample size of a substance? Give examples for<br> each.

zepelin [54]

Answer:

Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present.

7 0

3 years ago

How can you improve the percent yield of copper in this lab? Check all possible strategies that will help you do so.

Paladinen [302]

Measure reactants precisely.

Stir to help the reaction take place.

Wait patiently until the reaction completes.

Make sure to recover as much copper as possible.

Explanation:

Anything that increases the rate of this reaction will improve the yield of copper production.

The rate of reaction is usually a factor of how the concentration of reactants and products changes with time.

Some of the factors that affects the rate of a reaction are:

Nature of reactants
concentration or pressure if gases
temperature
presence of catalysts
degree of mixing

In this reaction:

to ensure we have the maximum amount of copper produced, measure out the exact/accurate amount of reactants stated
make sure you stir the reactants to ensure they mix and combine.
ensure you are not too much in haste. Wait for the reaction to go into completion.
recover as much copper as possible

learn more:

Chemical reaction brainly.com/question/6281756

#learnwithBrainly

8 0

4 years ago

Read 2 more answers

Why is DNA known as a double helix?

Alex777 [14]

The answer is in your question:Two A double helix of DNA is formed when two DNA strands each having a 5’and 3’ end wind around each other. Each of the DNA strands have nucleotides present. The two strands are held by hydrogen bonds.

3 0

3 years ago

Can I please get help with this question ‍♂️?

guapka [62]

Answer:

1.50 moles of POH or Potassium Hydroxide.

Explanation:

First of all, find the substance formula

The substance formula of Potassium Hydroxide is

KOH

Second of all, if you want to convert from grams to moles, you use molar mass of KOH

Third of all, find the molar mass of KOH.

K = 39.1 amu

O = 16.0 amu

H= 1.0 amu

Potassium has 1 atom, oxygen has 1 atom, and hydrogen has 1 atom.

So do this:

39.1(1) + 16.0(1) + 1.0(1) = 56.1

The molar mass of KOH is 56.1 g/mol.

Fourth of all, use dimensional analysis to show your work.

84.20 grams of KOH * 1 mol/56.1 g/mol

The moles will cancel out.

84.20 divided by 56.1 = 1.500892166

But I have to round my answer to two digits after the decimal points instead of using sig figs.

So I round to the hundredths place

1.500892166 = 1.50

So the final answer is 1.50 moles(don't forget the units) of POH.

Hope it helped!

3 0

3 years ago