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The rule for significant figures is that when adding, subtracting, dividing, or applying any mathematical treatment, one cannot calculate a result that has more significant digits than that of the input with the least number of significant digits. This is because any result cannot be more accurate than the least accurate input.

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Q: What is the Rule about significant figures when adding or subtracting measurements?

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First you work our how much to divide multiply by ( 1000,100,10 ). Then u add or subtract the amount

Any change (whether it be adding or subtracting) to the number of electrons would result in an ion. When an electron is added, the atom is called an anion. (If electrons are subtracted, it is a cation.)

Many of the calculations done by a working ChE involve Thermodynamics, Physical Chemistry and Kinetics and Catalysis. It's not just adding and subtracting by any means. A firm background in Math is required. I suggest that you find a copy of Perry's Chemical Engineering Handbook in the library, and thumb through it. You will get an feel for some of the work done.

yes. Adding salt makes it harder for the water molecules to form crystals.

If At 25 Degrees C, the molar solubility of barium chromate in water is 1.1 x 10^-5 M. Here is how you would find the solubility in grams per liter.First: You must know the molar mass of Barium Chromate To continue. Look at your periodic Table.[BariumChromate Molar mass=253.37 g/mol]*Get this by adding together atomic number of each element in BaCrO4*253.37= Ba+Cr+O(4), or 137.33+52+16(4)*Take 1.1 x 10^-5 M and divide by molar mass of Barium Chromate1.1 x 10^-5 mol/L x 253.37 =0.002787Answer in grams per liter to three significant figures=2.787 x 10^-3 g/LHow many liters of water are required to dissolve 1 of barium chromate?*take 1gram BaCrO4 / 2.787 x 10^-3 g/L --------> Grams Cancel=2.787 x 10^-3 LAnswer in liters to three significant figures =359.71 LitersWhat is the solubility of barium chromate in parts per million?*parts per million = Grams of Solute/grams of solution X 10^6 (which is ppm)2.787 x 10^-3g/L x 1L/1000g x 10^6 = 0.02779, or 2.78 x 10^-2ppmAnswer in parts per million to three significant figures=2.78ppm**For dilute aqueous solutions, ppm is equivalent to units of mg/l

Related questions

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

When adding and/or subtracting, your answer can only show as many decimal places as the measurement having the fewest number in the decimal places.

When adding or subtracting significant figures(sig figs), the answer will be significant to the same number of decimal places as the number with the least number of decimal places used in the calculation. Example: 12.44+1.6+133.887=147.927 ==>147.9

Three significant figures: two before the decimal point and one after.

Significant figures are used to receive a more accurate number. To obtain the number you you multiply or divide the quantities, leave as many significant figures in the answer as there are in the quantity with the least number or significant figures. If adding or subtracting quantities, leave the same number of decimal places in the answer as there are in the quantity with the least number of decimal places

measurements, adding, subtracting, fractions, and monet

Make sure the answer is rounded to significant digits as well.

Forget about "significant figures"; those are used to determine the precision when you multiply or divide. When adding numbers, the rule is that the result should be rounded according to the precision of the least accurate of the addents. In this case, to one decimal digit.

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