# What is the smallest roman number using each number once?

The smallest value Roman numeral using each symbol only once would be MCDXLIV = 1444

### What are the procedures in writing empirical formulas?

1. Determine the mass in grams of each element present, if necessary. 2. Calculate the number of moles of each element. 3. Divide each by the smallest number of moles to obtain the simplest whole number ratio. 4. If whole numbers are not obtained* in step 3), multiply through by the smallest number that will give all whole numbers * Be careful! Do not round off numbers prematurely

### What is the smallest 5 digit number using the digits 0 9 1 6?

Starting from the left, use the smallest possible digit for each position. Note that only four digits are given, so we can assume that we are free to choose the fifth digit. The first digit can't be "0", so use the next-smallest digit: "0". The next digits would be "169". For the final digit, add an additional zero.