Which of the following measurements contains two significant figures? a. 0.00300 l b. 0.00303 l c. 0.00033 l d. 0.00330 l

C. 0.00033 L.

Explanation:

A. 0.00300 L:

It has 3 significant figures that are in bold (0.00300 L).

3 is a significant figure (Nos. from 1 to 9 are considered to be significant numbers).

Zeros to the right of (Nos. from 1 to 9) are countable as significant Nos. if there is a decimal point.

So, It has 3 significant figures.

B. 0.00303 L:

It has 3 significant figures that are in bold (0.00303 L).

3 is a significant figure (Nos. from 1 to 9 are considered to be significant numbers).

Zeros between (Nos. from 1 to 9) are countable as significant Nos.

So, It has 3 significant figures.

C. 0.00033 L:

It has 2 significant figures that are in bold (0.00033 L).

3 is a significant figure (Nos. from 1 to 9 are considered to be significant numbers).

Zeros to the left of (Nos. from 1 to 9) are not countable as significant Nos.

So, It has 2 significant figures.

D. 0.00330 L:

It has 3 significant figures that are in bold (0.00330 L).

3 is a significant figure (Nos. from 1 to 9 are considered to be significant numbers).

Zeros to the right of (Nos. from 1 to 9) are countable as significant Nos. if there is a decimal point.

So, It has 3 significant figures.

So, the right choice is: C. 0.00033 L.

1. they vary with a higher number because boiling is way hotter than melting

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.