How do you convert the following number of atoms to moles and moles to atoms as needed to get a, b, c and d?   Atoms Moles a.________________________________ 0.250 moles 3.4 x 1025 atoms b._______________________________ c.______________________________ 0.00015 moles 9.0 x 1019 atoms d.________________________________

1. How many GRAMS of phosphorus are present in 1.59 moles of phosphorus trichloride ? grams. 2. How many MOLES of chlorine are present in 1.88 grams of phosphorus trichloride ? moles.

Which of the following compounds contains the largest number of atoms?A. 4.0 moles of K2SB. 3.0 moles of NH3C. 2.0 moles H2SO4D. 5.0 moles of HCl

Convert 1.77×1024 atoms1.77×1024 atoms of carbon to moles of carbon. 1.77×1024 atoms= _____________________ mol C

The molar mass represents not a single atom or molecule but it represents Avogadro's number of atoms or molecules. The formula CS, represents 76.15 g (1 mole) of carbon disulfide. The percentage of sulfur by mass can be calculated as follows: 2S/1 CS₂ = (64.14 g S/76.15 g CS₂) x 100 = 84.22% S The following are examples how the mole concept is applied 1. Mole to gram conversion Determine the number of grams in 4.000 moles of H₂O Molar mass of H₂O = (2 x 1.01) + (1 x 16.00) = 18.02 g/mol 1 mole H₂O = molar mass of H₂O = 18.02 grams H₂O 4.000 mol H₂O x (18.02 g H₂O/ 1 mol H₂O) = 72.08 grams H₂O 2. Gram to mole conversion Determine the number of moles in 88.0 grams of CO₂ Molar mass of CO₂ = (1 x 12.01) + (2 x 16.00) = 44.01 g/mol 1 mole CO₂ = molar mass of CO₂ = 44.01 grams CO₂ 88.0 g CO₂ x (1 mol CO₂ / 44.01 g CO₂) = 2.00 moles CO₂ 3. Mole to molecule conversion Determine the number of molecules of H₂O in 3.00 moles H₂O 1 mole H₂O = 6.022 x 1023 molecules H₂O 3.00 mol H₂O x (6.022 x…

Which of the following describes "molecular weight" a. The mass of a single molecule of a given compound b. The mass of one dozen molecules of a given compound c. The mass of one mole of molecules of a given compound d. Molecules are so small they don't weigh anything moles

a. Write the formula and calculate the molar mass for calcium chloride. Formula: Molar mass = g b. Write the formula and calculate the molar mass for calcium sulfate. Formula: Molar mass = g c. Write the formula and calculate the molar mass for silver chloride. Formula: Molar mass = g

How many MOLES of dioxygen difluoride are present in 2.51 grams of this compound? How many GRAMS of dioxygen difluoride are present in 3.52 moles of this compound? moles. grams.

Consider 68.9 g of Pb(SO4)2 to answer the following questions. a. How many moles of Pb(SO4)2 is this? ____________________________ b. How many molecules of Pb(SO4)2 is this? ____________________________ c. What is the weight of one molecule of Pb(SO4)2 in amu? _________________ d. How many grams are 4.23 x 1022 molecules? __________________________

63.45 g of Zn contains ______ moles.