a) Calculate the number of moles of iron in a 15.0 g sample of iron.
b) Calculate the number of atoms in 0.25 mol of silicon.
c) Calculate the mass in grams needed to have 2.65 x 1022 atoms of calcium.
a) Calculate the number of moles of iron in a 15.0 g sample of iron. b)...
a.) how many moles of iron is 66.8 g of Fe? __________________ mol Fe b.) How many grams of iron is 4.89 x 10-2 mol Fe? __________________ g Fe c.) How many atoms are present in 0.950 mol of uranium? _________________ x10 _________________ U atoms d.) 3.84 × 106 sulfur atoms is how many moles? __________________ x10 _______________ moles
DATE 1. How many moles of Na are there in 47.3 g of Na? 2. Calculate the number of grams of sulfur in 112.4 moles of sulfur. 3. Calculate number of atoms in 4.6 g of calcium. 4. How many H atoms are in 272.5 g of methanol, CH0? 5. For the given reaction N, (g) +3H,(g)->2NH(g) a. How many moles of NH, are formed by the complete reaction of 0.154 moles of H? b. How many grams of NH,...
bints Previous Answers Zumintro6 8.P.085. My Na the following table. moles of sample mass of sample 4.43 g C6H6 atoms in sample molecules in sample 3.41e22 10.0567 mol 223. 939 0.218 mol H20 1.31e23 mol 69 47.0 2.65 x 1022 molecules CO2 22777e23 g 1.29 mol HCI A h 9 ol | 4.04 x 1024 molecules H20 mol 99 5.95e21 0.317 g CH3OH 420.00989 Wer Practice Another Version Submit Assignment Save Assignment Progress -arch
2. Complete the following calculations: a. How many atoms are in 0.932 moles of copper? b. How many moles of water are in 9.028 x 1022 water molecules? C. What is the molar mass of calcium carbonate? d. How many grams of water are in a 1.02 mole sample of water? e. How many moles of methane are there in 278 g of methane?
A sample of pure copper has a mass of 14.0 g. Calculate the number of moles in the sample and copper atoms in the sample. (a) moles in the sample (b) copper atoms in the sample
A chemist weighed out 101. g of iron. Calculate the number of moles of iron she weighed out. Be sure your answer has the correct number of significant digits. mol x 5 ?
1. Calculate the number of moles in each sample. a. 15.7 g CCl b. 1.8 x 1021 formula units of NaC 2. Calculate the number of grams in each sample 1.23 mol magnesium bromide 7.310 x 1025 molecules of H202 a. b. 3. Calculate the mass percent of H in each of the following compounds. C2H2 C2HsCI a. b. 4. Calculate the empirical formula of each of the following Methy butyrate: 58.80 % C, 9.87 % H, 31.33 % O...
1) Calculate the number of moles of Cl atoms in 3.01×1024 formula units of magnesium chloride, MgCl2. Express your answer numerically in moles. 2) In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chlorine present in 100 g of chlorine gas. Express the quantity in moles to three significant figures. 3) Sodium hydroxide, NaOH, is a strong base that is used in industrial synthesis and processes such as...
Perform the following calculations (24 pts.) a. 20.0 g H2O (18.0 g/mol) to moles b. 1.00 mol C6H6 (78.1 g/mol) to grams c. 5.00 x 1022 molecules O2 (32.0 g/mol) to grams d. 0.333 g C6H12O6 (180.2 g/mol) to moles e. 12.2 g CCl4 (153.8 g/mol) to atoms of Cl f. 4.20 g HNO3 (63.0 g/mol) to molecules HNO3
Complete the following table. atoms in sample molecules in sample moles of sample mass of sample 404.70e25 X 403.19e22 400530 mol 4.14 g C6H6 402.60e24X 40 1.44e23 0.239 mol H2O 404.31 9 2.61 2.61 x 1022 molecules CO2 404.3 mol 4.0 191 g 7.28 40 7.29e23 1.21 mol HCI 4A44.1 444.08 4.08 x 1024 molecules H20 40 6.78 mol 40122 405.71e21 5.71 Check the number of significant figures. mol a0 .0095 0.304 g CH30H