Chemistry

Chemistry, 07.11.2019 08:31, whitneyt3218

Four nails have a total mass of 4.42 grams how many moles of iron atoms do they contain

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Chemistry, 03.07.2019 14:50, taylorruiz16

Mole-atom conversions 1. how many moles are 1.55 x 1027 atoms of zinc (zn)? 2. how many atoms are in 25.0 moles of calcium (ca)? 3. how many atoms are in 0.35 moles of carbon (c)? 4. how many moles are 7.6 x 1024 atoms of helium? mole-mass conversions how many moles in 28.o grams of oxygen? what is the mass of 5.0 moles of iron? find the number of moles of argon in 452 g of argon. find the grams in 16.5 mol of hydrogen.

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Chemistry, 12.07.2019 02:30, offmylawn

Choose the most efficient and accurate way to prepare a sample containing 0.75 moles of iron (fe) atoms.group the iron atoms in bundles of 1000 atoms so they can be counted faster.take a bar of iron that contains one mole of atoms, measure the length carefully, and remove 1/4 of the bar's length. weigh 41.89 grams of iron.count 4.5 ✕ 1023 fe atoms.

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Chemistry, 18.08.2019 16:30, cheesedoodle

4. how many moles are in 54.0 grams of silver? 54.0 g ag x (108mol ag /1 g ag ) = 5,832 ag moles ag (use the gray boxes to insert the values for the conversion factors.) 5. what is the mass of 6.3 moles of sulfur? 6.3 mol s x ( / ) = g s 6. how many atoms are in 6.0 moles of argon? 6.0 mol ar x ( / ) = atoms of ar 7. how many moles of kr are in 112 g of krypton? 112 g kr x ( / ) = moles of kr 8. how many moles are in 1.93 x1024 formula units of kf, potassium fluoride? 1.93 x1024 formula units x ( / ) = mol kf (the next two problems need 2 step conversions - so there are two conversion factors (fractions) for the problem - remember the mole map - covert to moles first, then to the desired unit.) 9. how many atoms are in 86.2 g of si (silicon)? 86.2 g si x ( / ) x ( / ) = atoms of silicon 10. what is the mass in grams of 4.8 x 1024 atoms of magnesium? 4.8 x 1024 atoms of mg x ( / ) x ( / ) = g mg

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Chemistry, 07.10.2019 01:50, iselloutt4fun

85 points asap 1. how many molecules are in 7.5 grams of oxygen gas? 2. 2hgo(s) --> 2hg(l) + o2 (g) in a certain reaction 4.37 of hgo is decomposed, producing 2.5 of hg what is the percent yield for the reaction? 3. 4 fe(s) + 3o2(g) --> 2fe2o3(g) in a certain reaction, 27.3 g of iron is reacted with 79.9 g of oxygen how many grams of the excess reactant remain after the reaction is complete? 4. how many moles are in 10.25 grams of nh3? 5. what is the empirical formula mass (efm) of p2o5? 6. how many molecules are in 1.84 moles of water? 7. 4 fe(s) + 3o2(g) --> 2fe2o3(g) in certain reaction, 27.3 g of iron is reacted with 45.8 g of oxygen. what is the limiting reactant? 8. how many moles are in 2.62 x 1023 molecules of c6h14? 9. fe2o3(s)+3co(g)⟶2fe(s)+3co2(g) how many moles of co are required to completely react with 1.225 moles of fe2o3? 10. how many moles are there in 1.3 x 1024 atoms of barium? 11. how many carbon atoms are present in 0.52 moles of c2h6o? 12. a compound has a chemical composition of 51% carbon, 9.3% hydrogen, and 39.2% oxygen. what is the empirical formula?

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Four nails have a total mass of 4.42 grams how many moles of iron atoms do they contain...

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