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3 years ago

How many shells does Potassium (K) have?

2 answers:

6 0

Answer:19 i think because if Potassium atoms have 19 electrons and 19 protons with one valence electron in the outer shell.

Airida [17]3 years ago

4 0

Answer:

Potassium. Potassium is the fourth element in the first column of the periodic table. It is classified as an alkali metal. Potassium atoms have 19 electrons and 19 protons with one valence electron in the outer shell.

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Benzoic acid has Ka =6.5× 10 ?5 , and citric acid has Ka =7.2× 10 ?4. What is the stronger conjugate base?

likoan [24]

Answer: The stronger conjugate base is, Citric acid.

Explanation :

The value of dissociation constant of Benzoic acid is higher than the citric acid. This means that the acid will readily dissociate and stronger will be the acid. Higher the value of dissociation constant of an acid weaker will be its conjugate base and the lower value of dissociation constant of an acid means that the stronger will be its conjugate base.

Therefore, the stronger conjugate base is Citric acid.

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2 years ago

To test the effectiveness of a gunpowder mixture, 1 gram was exploded under controlled STP conditions, and the reaction chamber

Phoenix [80]

Answer:

The volume of the gas at given temperature is $1300 cm^3$

Explanation:

$P_1$ = initial pressure of gas = 1 atm

$T_1$ = initial temperature of gas = $0^oC=273.15 K$

$V_1$ = initial volume of gas = $310 cm^3 = 310 mL = 0.310 L$

( $1 cm^3= 1mL$ , 1 mL = 0.001 L)

$P_1V_1=nRT_1$ ..[1]

$P_2$ = final pressure of gas = 2.1 atm

$T_2$ = final temperature of gas = $2,200^oC=273+2200 K=2473.15 K$

$V_2$ = final volume of gas = ?

$P_2V_2=nRT_2$ ..[2]

By dividing [1] and [2] we get combined gas equation :,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

$V_2=\frac{P_1V_1\times T_2}{T_1\times P_2}$

Now put all the given values in the above equation, we get:

$V_2=\frac{1 atm\times 0.310 L\times 2473.15 K}{273.15 K\times 2.1 atm}$

$V_2=1.3 L=1300 mL= 1300 cm^3$

The volume of the gas at given temperature is $1300 cm^3$

3 0

3 years ago

Read 2 more answers

Draw the major organic product for the reaction of 1-phenylpropan-1-one with the provided phosphonium ylide.

prohojiy [21]

Answer:

2-methylene propylbenzene

Explanation:

The Wittig Reaction is a reaction that converts aldehydes and ketones into alkenes through reaction with a phosphorus ylide.

The ketone in this case is 1-phenylpropan-1-one. The provided phosphonium ylide is shown in the image attached. The reaction involves;

i) alkylation

ii) addition

The product of the major organic product of the reaction is 2-methylene propylbenzene.

4 0

2 years ago

What are the bad side effects of multitasking? 2-4 sentences pleaze

Reil [10]

Answer:

Today, the vast majority of us multitask while using our smartphones. We play games, email, surf social media, text, and use apps and other functions while watching television, eating, doing work, or while "engaged" in a conversation with another person. Multitasking has become such a regular part of our lives that most of us believe we do it well—and few imagine it could actually be dangerous.

Explanation:

1. Multitasking is associated with harm to our brains.

2. Multitasking can lead to memory problems.

3. Multitasking can lead to increased distractibility.

4. Multitasking can make us walk into traffic.

5. Multitasking hurts your grades and the grades of those around you.

6. Multitasking can lead to falling and breaking bones.

7. Multitasking can harm your relationship.

8. Multitasking increases chronic stress.

9. Multitasking increases depression and social anxiety.

10. Multitasking makes you less productive and less efficient.

6 0