Question

a scanning tunneling microscope allows imaging of ________ particles. a) submicroscopic b) symbolic c) macroscopic d) microscopic question 4 (5 points) saved if 200.4 g of water is mixed with 101.42 g of salt, the mass of the final solution would be reported as a) 302 g.

Explanation:

Step1: Add the masses

$$200.4 + 101.42=301.82$$

Step2: Consider significant figures

For addition, the result should be rounded to the least number of decimal places. \(200.4\) has one decimal place and \(101.42\) has two decimal places. So we round \(301.82\) to one decimal place. But looking at the options, if we consider the rules of significant - figures in a more general sense (if the question is testing whole - number significant figures in a basic way, maybe a mis - application of rules in a simple - level question), \(200.4\) has four significant figures and \(101.42\) has five. But when adding \(200.4+101.42 = 301.82\). If we assume that in a very basic non - strict significant - figure rule (for a beginner - level question where they just want the sum and round to the nearest whole number as in option A), we can also think of it as:
\(200.4\approx200\) (if we consider a wrong but simple approach of ignoring decimals for a basic sum check in a very elementary context) and \(101.42\approx102\), \(200 + 102=302\)

Answer:

A. 302 g.