Chemistry 1

• Which of the following represents the electronic configuration for the element calcium? -None of these electronic configurations are correct
• Which element has the following orbital diagram 1s,2s,2p,3s -Mg 
• Which element is an S block element -He
• What is the charge of the ion formed by group 7A elements - -1
• When forming ions, metals typically do which of the following -lose electrons to form positively charged ions
• Which of the following elements can not be classified as a metal with variable charge? Al
• What is the proper name for MgF2 -Magnesium fluoride
• What is the mass in kilograms of an individual who weighs 197 lb? -89.5kg
• Carry out the following calculations and report the answer using the proper number of significant figures: 549.101 + 8.12 + 95.0076 - 651.9? -0.3
• What is the mass in grams of 85.32 mL of blood plasma with a density of 1.03 g/mL? -87.9 g
• Carry out the following calculations and report the answer using the proper number of significant figures: 38.251 x 73.1? -2.80 x 10^3
• Which metric relationship is incorrect? -1 milligram = 1,000 grams 
• Carry out the following calculation and report the answer using the proper number of significant figures: 38.251 + 73.1? -111.4
• Which of the following properly represents the order of orbital filling based on the relative energy of the orbitals? -1s,2s,2p,3s,3p,4s,3d,4p
• Which atom has the largest atomic radius? Rb
• Which element has the following orbital diagram 1s,2s,2p? -O(oxygen)
• What is the formula for the ionic compound formed when potassium and bromine combine? -KBr
• An atom has the electron dot symbol (X = three dots). If this atom is a main group element, what charge will it form in its ionic state? +3
• What is the mass number of the isotope with the symbol Cl -37
• When calculating the atomic weight of an element, which of the following is not considered in the calculation? -the number of electrons in each isotope 
• The law of conservation of mass states that -atoms cannot be created or destroyed in a chemical reaction
• A coefficient of 4 that is placed in front of CO  2 in a balanced chemical equation indicates that -There are four molecules of CO2 present
• The Greek letter delta (triangle shape) may be written over the reaction arrow in a chemical equation in indicate that -heat is needed for the reaction to occur
• Which type of chemical reaction begins with only one reactant? -decomposition
• Which chemical equation is properly balanced? -2SO2 + O2 + 2H2O - 2H2SO4
• In order to balance the chemical equation N2(g) + __ H2(g) - 2NH3(g), what coefficient should be added in front of the hydrogen gas? -3 
• In order to balance the chemical equation that represents the rusting of an solid iron nail, what coefficient should be added in front of the iron (III) oxide / 4Fe(s) + 3O2(g) - __ Fe2O3(s)? -2
• In the chemical equation: C3H8 + 5O2 - 3CO2 + 4H2O, how many oxygen atoms are on each side of the equation? -10
• How many carbon atoms are in 3.85 mol of carbon? -2.32 x 10^24 carbon atoms
• Which conversion factor should be used when converting from the number of atoms of magnesium to the number of moles of magnesium? -1 mole/(6.02 x 10^23 Mg)
• A student runs the reaction: LiOH + CO2 - LiHCHO3. The reaction consumes 45.0 g LiOH and produces 72.8 g of LiHCO3. Which of the statements concerning this reaction is true? -The actual yield of the product is 72.8 g LiHCO3
• The chemical equation: KCIO3(s) - KCL(s)+O2(g) is not balanced. Balance this equation then select the statement that best describes the balanced equation? -The balanced equation will have six atoms of oxygen on each side of the equation
• What is the molar mass of the compound S-H,H-C-O-H,H-N=C-H? -91.14 g/mol
• How many of the following represent oxidation half reactions 

   Ag+ + E- = AG

  Zn2+ + 2e- - Zn

  Cu+ - Cu2+ + e-

  O2+4e- - 2O2- 

  -1
• A balanced chemical equation tells the number of __ of each reactant that combine and the number of __ of each product formed. -Moles; moles
• How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced equation / 2 SO2 + O2 - 2 SO3? -3 mol of SO3
• The molecules A and B react according to the following chemical equation: A + B - C. Identify the limited reactant under the reaction conditions shown in the molecular art below. (A = large grey circles + B = small black circles) -A is the limiting reactant
• What is the molar mass of cholesterol (C27H46O), an essential chemical that allows our bodies to produce Vitamin D but can contribute to the narrowing of the arteries (a condition called atherosclerosis) when present in excess? -386.6 g/mol
• What is the molar mass of cortisol (C21H30O5), a steroid hormone produced in the human body by the adrenal gland? -362.5 g/mol
• What is the formula weight of KCI? -74.55 amu