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3. Problem Solving: (10 Pts each) Answer on this sheet 1) If 2.01 x 1023 atoms of an element sodium atoms from Grou...
Chemical Quantities and Chemical Composition 1. How many atoms are in 15 moles of sodium? 2....
Chemical Quantities and Chemical Composition 1. How many atoms are in 15 moles of sodium? 2. How many moles are in 2.1 x 10^22 molecules of H2SO4? 3. How many atoms are in 7.22 moles of gold? 4. How many atoms are in 90.43 of Xenon? 5. How many grams do 1.96 x 10^24 atoms of sodium weight? 6. Calculate the molar mass of AgNO3. 7. Calculate the molar mass of Fe2O3. 8. Calculate the molar mass of CaCO3 9....
Problem 4.32 Your answer is partielly correct. Try again. One mole of magnesium (6 x 1023...
Problem 4.32 Your answer is partielly correct. Try again. One mole of magnesium (6 x 1023 atoms) has a mass of 24 grams, and its density is 1.74 grams per cubic centimeter, so the center-to-center distance between atoms is 2.84 x 10-10 m. You have a long thin bar of magnesium, 2.9 m long, with a square cross section, 0.07 cm on a side. You hang the rod vertically and attach a 64 kg mass to the bottom, and yooberve...
I need help solving these. I need to know the steps and calculations. 1. (1 pt)...
I need help solving these. I need to know the steps
and calculations.
1. (1 pt) How many moles of K2S are 2.70 g K,S? 2. (1 pt) What is the mass of 4.26 g of K2S? 3. (1 pt) How many atoms of Cu are in 7.1 moles of Cu? 4. (1 pt) How many moles of C are in 5.80 x 10atoms of C? 5. (2 pts) How many atoms of Fe are in 81.4 g Fe? 6....
1.The mass spectrum of a hypothetical element shows that 71.51% of the atoms have a mass...
1.The mass spectrum of a hypothetical element shows that 71.51% of the atoms have a mass of 27.977 u, 3.052% have a mass of 28.976 u, and the remaining have a mass of 29.974 u. Calculate the average atomic mass of this element (in units of u). (Use 4 Sig. Fig. Don't round until end.) 2.Bromine occurs naturally as two isotopes, one with a mass of 78.918 u and the other with a mass of 80.916 u. Suppose the average...
The working substance in an engine is 3.0 x 1023 He atoms. Initially in state 1,...
The working substance in an engine is 3.0 x 1023 He atoms. Initially in state 1, the gas volume is V1=1.5 x 10-3 m3 and the pressure is P1=1.00 x 106 N/m2 . The gas undergoes a cycle that consists of four processes: (1→2) an isothermal expansion, (2→3) an isobaric compression until the volume is V3=2.00 x 10-3 m3 and the pressure is 2.00 x105 N/m2 , (3→4) an isothermal compression until the volume is V4=V1, and (4→1) an isochoric...
Chemistry 107 Problem Solving Handout #13 NameloMAS hoME2 1. Calculate the mass (m/m) percent of sodium...
Chemistry 107 Problem Solving Handout #13 NameloMAS hoME2 1. Calculate the mass (m/m) percent of sodium iodide in solution prepared by dissolving 6.43 g of Nal in 85.0 g HO. How many grams of solute are dissolved in 35.0 g of 2.00 % ( m/m ) NaCl solution? 2. What is the volume (v/v) percent water in a solution containing 257 mL of ethyl alcohol and enough water to give a total volume of 325 mL? 3. 4. Determine how...
2. If water has 10 electrons per atom (1 from each hydrogen, 8 from the oxygen),...
2. If water has 10 electrons per atom (1 from each hydrogen, 8 from the oxygen), there are 18 g of water per mole and Avogadro's number (6.022 x 1023) of atoms per mole, how many grams of water do you need to have one Coulomb of charge from electrons?
Problem Solving Question I11 (10 pts) On January 1 2015, Patterson Inc. issued $100,000, 8% bonds...
Problem Solving Question I11 (10 pts) On January 1 2015, Patterson Inc. issued $100,000, 8% bonds for $92.27 8. The market e annually rate of interest for these bonds on January 1, 2015 was 10%. Inters is payabl on December 31. The maturity date of the bonds is December 31, 201 Please answer the following questions (1) Prepare the discount amortization table. (3 pts C) Prepare the journal entry on December 31, 2015, based on US GAAP and IFRS respectively....
How many grams of sodium iodide are required to react completely with 3.01 x 1023 molecules...
How many grams of sodium iodide are required to react completely with 3.01 x 1023 molecules of chlorine? 2 NaI + Cl2 ------> I2 + 2 NaCl A. 1.50 g B. 37.5 g C. 150. g D. 74.9 g 1 points QUESTION 2 When 22.0 g of NaOH and 21.0 g of H2SO4 are mixed and react according to the reaction: 2 NaOH + H2SO4 ------> Na2SO4 + 2 H2O, which is the limiting reagent? A. NaOH B. H2SO4 C....
Box models in chemical oceanography 1. (40 pts) Element 'X' is at steady state in the...
Box models in chemical oceanography
1. (40 pts) Element 'X' is at steady state in the ocean. The main input of this element to the ocean is from rivers and the main output is stripping of the element from seawater during hydrothermal vent circulation (concentration of X in the return flow from the vents to the ocean is 0). The following is known: Volume of ocean: 1.4 x 10 L Xi: .0 x 10 mol L River flow to ocean:...
Problem 4.32 Your answer is partielly correct. Try again. One mole of magnesium (6 x 1023 atoms) has a mass of 24 grams, and its density is 1.74 grams per cubic centimeter, so the center-to-center distance between atoms is 2.84 x 10-10 m. You have a long thin bar of magnesium, 2.9 m long, with a square cross section, 0.07 cm on a side. You hang the rod vertically and attach a 64 kg mass to the bottom, and yooberve...
I need help solving these. I need to know the steps
and calculations.
1. (1 pt) How many moles of K2S are 2.70 g K,S? 2. (1 pt) What is the mass of 4.26 g of K2S? 3. (1 pt) How many atoms of Cu are in 7.1 moles of Cu? 4. (1 pt) How many moles of C are in 5.80 x 10atoms of C? 5. (2 pts) How many atoms of Fe are in 81.4 g Fe? 6....
Chemistry 107 Problem Solving Handout #13 NameloMAS hoME2 1. Calculate the mass (m/m) percent of sodium iodide in solution prepared by dissolving 6.43 g of Nal in 85.0 g HO. How many grams of solute are dissolved in 35.0 g of 2.00 % ( m/m ) NaCl solution? 2. What is the volume (v/v) percent water in a solution containing 257 mL of ethyl alcohol and enough water to give a total volume of 325 mL? 3. 4. Determine how...
2. If water has 10 electrons per atom (1 from each hydrogen, 8 from the oxygen), there are 18 g of water per mole and Avogadro's number (6.022 x 1023) of atoms per mole, how many grams of water do you need to have one Coulomb of charge from electrons?
Problem Solving Question I11 (10 pts) On January 1 2015, Patterson Inc. issued $100,000, 8% bonds for $92.27 8. The market e annually rate of interest for these bonds on January 1, 2015 was 10%. Inters is payabl on December 31. The maturity date of the bonds is December 31, 201 Please answer the following questions (1) Prepare the discount amortization table. (3 pts C) Prepare the journal entry on December 31, 2015, based on US GAAP and IFRS respectively....
Box models in chemical oceanography
1. (40 pts) Element 'X' is at steady state in the ocean. The main input of this element to the ocean is from rivers and the main output is stripping of the element from seawater during hydrothermal vent circulation (concentration of X in the return flow from the vents to the ocean is 0). The following is known: Volume of ocean: 1.4 x 10 L Xi: .0 x 10 mol L River flow to ocean:...
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