Significant Figures!?

Question

Which Nos. has four significant figure?Why?
A)0.0014
B)0.01414
C)0.141
D)1.4140

Answer 1

B - read the rules below

Rules for counting significant figures are summarized below.

Zeros within a number are always significant. Both 4308 and 40.05 contain four significant figures.

Zeros that do nothing but set the decimal point are not significant. Thus, 470,000 has two significant figures.

Trailing zeros that aren't needed to hold the decimal point are significant. For example, 4.00 has three significant figures.

If you are not sure whether a digit is significant, assume that it isn't. For example, if the directions for an experiment read: "Add the sample to 400 mL of water," assume the volume of water is known to one significant figure.

Answer 2

B.

Zeroes immediately to the right of the decimal point are NOT significant figures (just place holders, like the zeroes in integers like 47000 and -3300000). A, then, has only 2 sigfigs, while C has 3.

D has 5 sigfigs. Why? In addition to the 1's and the 4's being significant, the 0 is also significant.

Answer 3

B

you can determine significant figures by putting the number into scientific notation. in this case, B is 1.414 x 10^4

there is 4 numbers in the first part, so there is 4 sig figs
A has 2
C has 3,
D has 5, by placing the 0 at the end, it becomes a sig fig

Answer 4

a.) 2
b.) 4
c.) 3
d.) 5

ANS : B.

Leading zeros are not significant

Answer 5

B and D.

Answer 6

B & D