Molar Mass.

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Presentation transcript:

Molar Mass

\ Molar Mass The mass of 1 mole of an element or compound Atomic mass has the units amu and is the color RED on the periodic table. The RED numbers are also the molar mass. Its units are g (grams) *molar mass = atomic mass *round to the nearest hundredth using mass from the periodic table!!

For an Element Take the element Carbon (C) Molar mass = 12.01g 1 mol of C = 12.01g How about Boron (B)? Molar mass = 10.81g

What is the molar mass of: C8H11NO2 magnesium phosphate Mg3(PO4)2

Calculate the mass in grams of 0.0450 moles of chromium (Cr). Example 8 Calculate the mass in grams of 0.0450 moles of chromium (Cr).

Example 9 What is the mass of 4.35 moles of sulfuric acid, H2SO4?

Example 10 Calculate the number of moles of 321 g of lead (II) chloride.

Example 11 How many formula units are in 124 g of mercury(II) chloride?

Example 12 What is the mass in grams in 1.50 x 1015 molecules of sulfur dioxide?

Example 13a A sample of aluminum chloride has a mass of 35.6 g. a. How many moles of chloride ions are present?

Example 13b A sample of aluminum chloride has a mass of 35.6 g. b. How many chloride ions are present?

Example 14 How many oxygen atoms are in 37.5 grams of SO3?