Answer:
2 significant figures i.e. 2 and 7.
Explanation:
We need to find the number of significant figures in the given number i.e.
.
It has 2 significant figures i.e. 2 and 7.
It means the power of 10 doesn't count in the significant figures.
Hence, there are 2 significant figures.
Answer:
The balloon would get larger as it gains water
Explanation:
Due to the process of osmosis, water molecules would passively move from an area of lower solute concentration, the water in the beaker, to an area of higher solute concentration, inside the balloon.
Answer:
Explanation:
From the given information:
At wavelength = 270 nm

At 270 nm
Suppose x is said to be the solution for the concentration of x and y to be the solution for the concentration of y;
Then:


Divide both sides by 200


Use l = 1cm (i.e the standard length)
Then;

<u>For 540 nm:</u>


since l = 1

Equating both (1) and (2) together, we have:

Letter D.
The scarier the better, and many people like loops