Chm 1045 Study guides, Class notes & Summaries

CHM 1045 Final Exam (ANSWERS) 2024 - DISTINCTION GUARANTEED / Complete Verified Latest Version

Thermochemistry Ans: the study of the amount of heat absorbed or released during a chemical of physical reaction Energy Ans: the capacity to do work - causing matter to move against an opposing force Potential energy Ans: the energy of an object has based on its relative position, composition, condition Kinetic energy Ans: the energy an object possesses due to its motion What are chemical reactions and what forms of energy are associated with chemical reactions? Ans: substance conv...

Chemistry is... Ans:the study of matter Matter is... Ans:anything that takes up space and has mass Physical properties = Ans:are those which can be observed without changing the substance into something else Chemical properties = Ans:are those which are observed by changing one substance into another Hypothesis : Ans:an educated guess about the relationship between independent and dependent variables Independent variable : Ans:is a factor that's intentionally varied by the experiment...

___ are forms of matter - Substances ____ _____ provides information about percentages of different isotopes of each element - Mass spectrometer ____ + ____ are polar covalent molecules that dissociate into ions when introduced to water - Acids, bases _____ charge = # of protons > # electrons - positive _____ in an experiment are all the factors that the experimenter attempts to keep the same - Constant ______ charge = # protons < # electrons - negative "-ate" ending means - mor...

Acetate - C2H3O2- Ammonium - NH4+ Carbonate - CO32- Define a cation - An atom that loses an electron becomes a positively charged ion Define a covalent bond - A chemical bond formed by the sharing of a pair of electrons between atoms. Define a covalent compound - Composed of two or more nonmetal atoms bonded by sharing valence electrons. Define a group on the periodic table - The elements in any one column of the periodic table Define a metal, give its properties, and location on the pe...

Anions are - negative (ie, more electrons) Cations are - positive (ie, less electrions) Formula for density - d = m/v Formula Mass is measured by - adding up all the elements g/mol Formulas to conv. Celsius to Fahrenheit - 1. F = (C x 9/5) +32 2. C = (F +32) x 5/9 Formulas to conv. Kelvin to Celsius - C = K - 273.15 How do you find percent composition? - (# of element)(atomic mass of element) / (mass of entire compound) and then multiply by 100 How to find neutrons in an isotope? - numb...

Define the Scientific Method Ans: The general process of advancing scientific knowledge through observation, the framing of laws, hypotheses, or theories, and the conducting of more experiments Define the Law of Conservation of Mass Ans: The total mass remains constant during a chemical change (reaction) Define the Law of Definite Proportions Ans: A pure compound, whatever its source, always contains definite or constant proportions of the elements by mass. Define Law of Multiple Propo...

CHM 1045 Final Exam Questions and Answers(100% Verified)

Formulas to conv. Celsius to Fahrenheit Ans: 1. F = (C x 9/5) +32 2. C = (F +32) x 5/9 Formulas to conv. Kelvin to Celsius Ans: C = K - 273.15 Formula for density Ans: d = m/v How to find neutrons in an isotope? Ans: number given - number of protons (equal to number on periodic table) How to write formulas for ionic compounds Ans: balance charges How to name for molecular compounds Ans: use prefixes How to name ionic compounds Ans: use roman numerals for metals and add ide to non m...