Chem Help Needed! Plase explain these!?





before i give you the problems please jsut explain how to get to the answer. step by step please. I have no idea how to do this and im taking FLVS. please help!--------------------------------------… Question 1 (Multiple Choice Worth 2 points)How many moles of silver (Ag) are equivalent to 68.3 g Ag? 9.50 g 1.45 g 1.58 g 0.633 g --------------------------------------… Question 2 (Multiple Choice Worth 2 points)How many atoms are in a sample of 72.8 grams calcium (Ca)? 1.76 × 1027 atoms 1.09 × 1024 atoms 4.85 × 10-21 atoms 3.02 × 10-24 atoms --------------------------------------… Question 3 (Multiple Choice Worth 2 points)What is the mass of 3.8 × 1024 atoms of argon (Ar)? 0.0039 g 0.16 g 6.3 g 250 g --------------------------------------… Question 4 (Multiple Choice Worth 2 points)Which of the following has the greatest mass, in grams? 0.3 mol iron (Fe) atoms 1 atom of silver (Ag) 25 atoms of lead (Pb) 1 mole of hydrogen atoms (H) --------------------------------------… Question 5 (Multiple Choice Worth 2 points)How many moles of oxygen (O) atoms are in a sample of 3.98 × 1023 atoms? 0.661 mol O 1.51 mol O 6.60 × 1022 mol O 2.40 × 1047 mol O --------------------------------------… Question 6 (Multiple Choice Worth 2 points)What is the mass of 18.8 moles of helium (He) atoms? 0.213 g 4.70 g 37.6 g 75.2 g --------------------------------------… Question 7 (Multiple Choice Worth 2 points)How many moles of cesium (Cs) atoms are in 675 g Cs? 0.197 mol 5.08 mol 8.97 × 104 mol 4.06 × 1026 mol --------------------------------------…Question 8 (Essay Worth 2 points)What is the mass, in grams, of a sample of 1.20 × 1022 atoms of mercury (Hg)? Show your work or explain the steps that you used to determine your answer. short answer please explain! --------------------------------------… Question 9 (Multiple Choice Worth 2 points)If you were asked to convert 4.2 × 10622 atoms of aluminum to moles, which of the following should you use for the conversion? a. (6.022 multiplied by 10



Similar Asks:

  • Which of the following is least likely to dissolve in the polar solvent water? oil salt sugar ethanol? - Which of the following is least likely to dissolve in the polar solvent water?oilsaltsugarethanolQuestion 2 (Multiple Choice Worth 3 points)If 3.2 moles of NaCl are dissolved in enough water to make a 0.98-liter solution, what is the molarity of the solution?0.31 M NaCl0.77 M NaCl1.3 M NaCl3.3 M NaClQuestion 3 (Essay Worth 4 points)What would
  • I need help in math algebra? - Question 1 (Multiple Choice Worth 4 points)Simplify the following expression.a + c − 4b − c + a − ba − 6ba − 5b2a − 6b2a − 5bQuestion 2 (Multiple Choice Worth 4 points)Evaluate: 3(6 − 3) − 1 • 6−60−338Question 3 (Multiple Choice Worth 4 points)Mr. Lemons earns $1000 for every used car he
  • Please help me I am trying to study for a test so i need the answers? - 5y = 5y is an example of which algebraic property? Symmetric Property Transitive Property Reflexive Property Commutative Property of MultiplicationQuestion 3 (Multiple Choice Worth 3 points)Solve: 3x = −18 −5 6 −6 −9Question 4 (Multiple Choice Worth 3 points)Solve: 5(x + 8) = 7(x − 2) 17 −17 27 −27Question 5 (Multiple Choice Worth 3
  • Please need to make sure that my answers are all correct.? - Question 1 (Fill-In-The-Blank Worth 4 points) Answer for Blank 1: ————————————–…Question 2 (Fill-In-The-Blank Worth 4 points)-8(-3) Answer for Blank 1: ————————————–… Question 3 (Multiple Choice Worth 4 points)Choose the equation that best represents the information below. Five more than twice a number is eight more than three times the number. 8(3n) = 5(2n)
  • Algebra 1 help easy 10 points? - Solve: 3(x + 1) + 6 = 33 10 8 8.7 −8 ————————————–… Question 5 (Multiple Choice Worth 1 points)Which of the following describes the correct process for solving the equation 2x + 6 = 22 and arrives at the correct solution? Divide both sides by 6 and then add
  • Can some one help me with these math questions? - Question 1 (Multiple Choice Worth 4 points)Factor completely: x2 + 10x + 25 (x + 5)(x – 5) (x + 5)(x + 5) (x – 5)(x – 5) (x + 25)(x + 1) ————————————–… Question 2 (Multiple Choice Worth 4 points)Factor completely: 3×2 – 12 3(x2 – 4) 3(x
  • Earth science please help? - During which step in the Can Crush Lab did water vapor force air from the can? The can was filled nearly to the top with water. The can was placed on the hot stove top burner for several minutes. The can was removed from the hot stove top burner. The can




Comments are closed.