Answer: Water’s polarity causes cohesion that pulls other water molecules up through a plant.
Answer: D. all the empirical evidence available.
Explanation:
Answer:
D
Explanation:
Velocity is the displacement made per unit of time.
If direction or speed of the object change it causes change in velocity.
Acceleration is the term used for measuring the change of velocity. Acceleration is the change of velocity per unit of time.
Answer:
D. a pure substance and an element.
Explanation:
IM JUST HIM
(2) 0.50 atm (4) 1.5 atm
Answer:(4) 1.5 atm
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas at STP= 1 atm
= final pressure of gas = ?
= initial volume of gas at STP = V L
= final volume of gas = V L
= initial temperature of gas at STP= 273K
= final temperature of gas = 410 K
Now put all the given values in the above equation, we get the final pressure of gas.
Therefore, the pressure of gas will be 1.50 atm.
Answer : The concentration (in molarity) of the unknown solution Q is, 0.265
Explanation :
Using Beer-Lambert's law :
where,
A = absorbance of solution
C = concentration of solution
l = path length
= molar absorptivity coefficient
From the Beer's Law plot between absorbance and concentration we concldue that the slope is equal to and path length is 1 cm.
As we are given that:
Slope = 0.543 M⁻¹
and,
Slope =
Now we have to determine the concentration (in molarity) of the unknown solution Q.
Using Beer-Lambert's law :
Therefore, the concentration (in molarity) of the unknown solution Q is, 0.265