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3 years ago

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Which statement is false?

1 answer:

mash [69]3 years ago

6 0

Answer: Energy from the combustion of gas is cleaner because it does not produce greenhouse gases like carbon dioxide and water is false

Explanation: The reason is because the energy from the combustion of gas is never clean

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I really need help on this one!!

Lady bird [3.3K]

Answer:

Due to the decrease in the gravitational force, it will take longer time for ball to reach the ground while dribbling. Moreover, the hang time of players will also be longer. This means that the players will stay on air longer and will be able to jump higher.

3 0

3 years ago

PLEASE HELP ASAP!!!! 15PTS

MA_775_DIABLO [31]

Answer:

Both contain a hydroxyl group on the second carbon.

Neither contain a hydroxyl group on an end chain carbon.

Explanation:

2,2-butanediol Formula: C4H10O2

2,3,4-pentanetriol Formula: C5H12O3

Both contain a hydroxyl group on the second carbon.

Neither contain a hydroxyl group on an end chain carbon.

5 0

4 years ago

I need an answer for this multiple-choice

Alekssandra [29.7K]

Answer:

is equal to the number of protons in carbon (C).

6 0

3 years ago

The radius of a potassium atom is 231 pm. how many potassium atoms would have to be laid side by side to span a distance of 2.86

Readme [11.4K]

Answer:

$6.1905\times 10^{6}$ of potassium atoms are needed.

Explanation:

Radius of the potassium atom,r = 231 pm = $2.31\times 10^{-7} mm$

$1 pm = 10^{-9} mm$

Diameter of the potassium atom = d

$d=2r=2\times 2.31\times 10^{-7} mm=4.62\times 10^{-7} mm$

let the number of potassium atom laid side by side to span a distance of 2.86 mm be x

$x\times d=2.86 mm$

$x\times 4.62\times 10^{-7} mm=2.86 mm$

$x=\frac{2.86 mm}{4.62\times 10^{-7} mm}=6.1905\times 10^{6}$

$6.1905\times 10^{6}$ of potassium atoms would have to be laid side by side to span a distance of 2.86 mm.

4 0

3 years ago

Read 2 more answers

A sample of gaseous PCl₅ was introduced into an evacuated flask so that the pressure of pure PCl₅ would be 0.50 atm at 523 K. Ho

Lera25 [3.4K]

Answer:

Kp = 0.2215

Kc = 0.0052

Explanation:

<u>Step 1:</u> The balanced equation

PCl5(g) → PCl3(g) + Cl2(g)

<u>Step 2:</u> given data

Initial pressure PCl5 = 0.50 atm

Temperature = 523 Kelvin

The actual pressure in the flask was found to be 0.74 atm.

<u>Step 3:</u> Calculate the pressure after the decomposition

Pressure of PCl5 after decomposition = 0.5 - X

Since the equation has a ratio 1:1 the pressure after the decomposition of PCl3 and Cl2 is X

<u>Step 4:</u> Calculate total pressure at equilibrium

0.74 atm = 0.5 atm - X + 2X

X = 0.74 - 0.5 = 0.24 atm

<u>Step 5:</u> Calculate Kp

Kp = P(PCl3)* P(Cl2) / P(PCl5)

Kp = 0.24² / 0.26 = 0.2215

<u>Step 6:</u> Calculate Kc

The ideal gas wet: P*V = nRT

with P= the pressure of the gas in atm

with V= the volume of the gas in L

with n= the number of moles

with R= the gas constant in L*atm/mol*K

T = the temperature in Kelvin

P= nRT/V

Kp= Kc*(RT)^Δn

Kc=Kp/(RT)^Δn

Kc= 0.2215 / (0.08206*523)^1

Kc= 0.0052

7 0

3 years ago