Carry out the following calculation and report the answer using the proper number of significant figures: 38.251 + 73.1
a) 111
b) 111.3
c) 111.4
d) 111.35
e) 111.351

111.4

Explanation:

1. Non zero digits are always significant for example 2356 has 4 significant figures

2. Zeros between Non zero digits are always significant 3007 has 4 significant figures

3. In a decimal trailing zeros are significant for example 0.0003 has 1 significant figures and 0.003000 has 4 significant figures.

Here we see all the options contain NON ZERO digits.

Hence the digits present in  all the numbers are significant and count them to find it

So the Answers are  

A)3 significant figures

B)4 significant figures

C)4 significant figures

D)5 significant figures

E)6 significant figures

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.