CHEM-100-EXAM 1 QUESTIONS AND ANSWERS GUARANTEED PASS

Equation - correct answers C = 5/9(F - 32) Fahrenheit Equation - correct answers F = 9/5( C ) + 32 Kelvin Equation - correct answers K = C + 273 Metric Length - correct answers Millimeter, Centimeter, Meter, Kilometer Imperial Length - correct answers Inch, Foot, Yard, Mile Metric Mass - correct answers Milligram, gram, kilogram Imperial Mass - correct answers Ounce, Pound, Stone Metric Capacity - correct answers Milliliter, Centiliter, Liter Imperial Capacity - correct answers Pint, Gallon A number is a significant figure if it is: - correct answers Not a zero A Zero Between Nonzero Digits A Zero At The End Of A Decimal Number In the Coefficient of a number written in scientific notation A Zero is NOT significant if it is: - correct answers At the beginning of a decimal number Used as a placeholder in a large number without a decimal point Dimensional Analysis (Unit Conversion) - correct answers Units you cancel * Units you want/Units you cancel = Units you want Calculating Percentages - correct answers Percentage (%) = Part/Whole * 100 Density Equation - correct answers Density = Mass/Volume Volume Displacement - correct answers Subtracting the new volume of water from the original volume will determine the volume of the object Energy Configuration / Orbitals - correct answers Protons (Symbol & Charge) - correct answers Symbol: p+ Positive Charge In the nucleus Neutrons (Symbol & Charge) - correct answers Symbol: n0 No Charge (Neutral) In the nucleus Electrons (Symbol & Charge) - correct answers Symbol: e- Negative Charge Move rapidly around the nucleus Mass Number - correct answers The sum of protons and neutrons in a single atom. It is a whole number. (Lithium - 4 neutrons + 3 protons = 7 Mass Number) Isotopes - correct answers Atoms of the same element that have different numbers of neutrons. Ionic Bonding: - correct answers Atoms give/take valence electrons and become charged. Positive and negative charged atoms (ions) attract through electrostatic attraction. Metal & Nonmetal elements. Covalent Bonding: - correct answers Atoms share 2, 4, or 6 valence electrons. Sharing their valence electrons makes them to stay close together. Nonmetal elements only! Octet Rule: - correct answers Atoms will interact to produce an electron configuration identical to that of the nearest noble gas for each atom. How many valence electrons do all atoms want? - correct answers 8 Ionic Naming Rules: - correct answers Metal & Nonmetal(s( in the formula Special exception is ammonium is in the formula instead of a metal Covalent Naming Rules: - correct answers Nonmetals only Special exceptions: you may see B or Si Lewis Structure - correct answers Symbolizes the arrangement of atoms and electrons in a covalently-bonded molecule. Molecular Shapes: - correct answers Linear Trigonal Planar Bent Tetrahedral Trigonal Pyramid 1 mole = - correct answers 6.02 x 10^23 Empirical Formula - correct answers the smallest whole-number ratio of each type of atom in the compound. Molecular Formula - correct answers a whole-number multiple of the empirical formula that shows the actual number of atoms of each element in the com