Use significant figures rule 6.021cm + 7.4cm + 0.68cm + 12.0cm = ?

10.4168m - 6.0m = ?

1.31cm x 2.3cm = ?

5.7621m x 6.201m = ?

20.2cm ÷ 7.4s = ?

40.002g ÷ 13.000005g = ?

8.41g + 2.067g = ?

5.11g - 0.042g = ?

(4.11 x 10^-6) (7.51 x 10^-4) = ?

8.45 x 10^7 / 6.74 x 10^3 = ?

9.7 x 10^8 / 8.6 x 10^-2

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Drive down any three characteristic of modern periodic table

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.