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# Why round empirical formulas to whole numbers?

Updated: 9/25/2023

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Q: Why round empirical formulas to whole numbers?
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### 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 do empirical formulas determine?

Empirical formulas determine the ratio of atoms of different elements within a chemical compound and can be derived by dividing the number of each element's atoms by their greatest common factor. They do not necessarily describe the full chemical makeup of a molecule. For example, benzene has the formula C6H6 but its empirical formula is simply CH because there is one hydrogen atom for every carbon atom. Glucose has the molecular formula of C6H12O6; its empirical formula is CH2O. Because the molecular formula for water, H2O, cannot be further simplified (empirical formulas have only whole numbers) H20 is also its empirical formula.

### Why did you need to round the empirical formula you obtaine to a whole number ratio?

Many people find whole number ratios easier to understand.

### How many different whole numbers round to 50?

Ten whole numbers round to 50, if you include 50 itself which requires no rounding.

### How can you find the answer for whole numbers on fractions?

You round to the nearest whole number.

### What are 0.089 and 0.129 round to the nearest whole numbers?

They both round down to zero.

### The smallest and the largest whole numbers that round to 300?

The largest whole number is 3499

9

450000

57

work out

### What are five whole numbers you can round to one million?

500,000999,999750,000800,001699,475