Question 8 of 11 Determine the number of moles in 4.21 x 1023 molecules of CaCl2 STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 77.6 1 6.022 x 1023 6.99 75.53 4.21 x 1023 3.79 x 1021 0.699 110.98 g Caclz g CaClz/mol molecules CaCl2 mol CaCl2

Convert 1.312 mol of NaHCO3 to grams

What mass in grams are in 5.32 x 1022molecules of CO2 ? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 5.32 x 1022 6.022 x 1023 44.01 3.89 2.01 x 10-3 1.41 x 1048 28.01 0.0883 molecules CO2 g CO2/mol g CO2 mol CO2

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Percentage to Compounds to formulas Question Part 1: A compound is found to contain 26.73 % phosphorus , 12.09 % nitrogen , and 61.18 % chlorine by mass. The empirical formula for this compound is_________________Question Part 2: The molar mass for this compound is 115.9 g/mol. The molecular formula for this compound is_______________

In this question below, what is the starting unit? How many molecules of carbon monoxide (CO) are needed to react with excess iron (III) oxide (Fe203) to produce 11.6 g of iron (Fe)? O g Fe203 O g co O g Fe O g Co2 O mole Fe203 O mol CO O mol Fe O mole CO2 Oparticles Fe203 O molecules cO Olatoms Fe molecules CO2

convert 698N to mol 4.9mol 4mol 9.4mol 3.9mol none of the above

O STARTING AMOUNT esc X # According to the balanced reaction below, calculate the moles of NH3 that form when mol of N₂H4 completely reacts ADD FACTOR X () 32.06 3.2 mol NH3 $ 4.2 1 % 3 g N₂H4 Question 24 OT 38 of N₂H4(1)→ - 6.022 x 1023 4.2 mol N₂ 3 4 NH3(g) + N₂(g) 6 5.6 ANSWER g N₂ 28.02 O 7 16.8 17.04 mol N₂H4 RESET 2 g NH3 4 Feb 23

MOLAR VIEW T03/S11 If a sample of SO3 is found to contain 5.29 mol of S atoms how many moles of O atoms are present? Molar Mass (g/mol) SO3 S atom O atom Avogadro's No. (mol"1) 6.022x1023 80.058 32.066 15.999 the tolerance is +/-2%