8F Compounds and Mixtures
... Sea water is a mixture of salts, water and other substances. A mixture is not the same as a compound: 1. The proportions of the substances in a mixture are not fixed. 2. The properties of a mixture are often an “average” of the properties of its ingredients (e.g. a mixture of a black and ...
... Sea water is a mixture of salts, water and other substances. A mixture is not the same as a compound: 1. The proportions of the substances in a mixture are not fixed. 2. The properties of a mixture are often an “average” of the properties of its ingredients (e.g. a mixture of a black and ...
Chemical Reactions Chemical Arithmetic
... reaction in which the oxidation numbers of elements change because of a loss or gain of electrons • Oxidation Number- A number that indicates the charge that an atom in a molecule or polyatomic ion would have if all bonds were ionic. – Fictitious- No actual charge of this magnitude actually exists w ...
... reaction in which the oxidation numbers of elements change because of a loss or gain of electrons • Oxidation Number- A number that indicates the charge that an atom in a molecule or polyatomic ion would have if all bonds were ionic. – Fictitious- No actual charge of this magnitude actually exists w ...
AP Chemistry Summer Assignment
... 76. An open flask contains 0.200 mol of air. Atmospheric pressure is 745 mmHg and room temperature is 68˚F. How many moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚C? 77. On a warm day, an amusement park balloon is filled with 47.8 g He. The temperature is 33˚ ...
... 76. An open flask contains 0.200 mol of air. Atmospheric pressure is 745 mmHg and room temperature is 68˚F. How many moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚C? 77. On a warm day, an amusement park balloon is filled with 47.8 g He. The temperature is 33˚ ...
PAP Chemistry - Fall Final Review
... 6. What did Rutherford discover from the Gold Foil Experiment – p.72 The nucleus and that the atom was mostly empty space 7. When is a bright-line spectrum produced by an atom? IE – How does an atom give off color (especially when burned)? The resting state or the ground state is when the electron i ...
... 6. What did Rutherford discover from the Gold Foil Experiment – p.72 The nucleus and that the atom was mostly empty space 7. When is a bright-line spectrum produced by an atom? IE – How does an atom give off color (especially when burned)? The resting state or the ground state is when the electron i ...
Unit 2
... atm and 25 oC. When the valve is opened, allowing the gases to mix, but not react: a) What is the new pressure of the nitrogen? b) what is the new pressure of the oxygen? c) What is the total pressure of the system? d) What is the mole fraction of nitrogen in this system? ...
... atm and 25 oC. When the valve is opened, allowing the gases to mix, but not react: a) What is the new pressure of the nitrogen? b) what is the new pressure of the oxygen? c) What is the total pressure of the system? d) What is the mole fraction of nitrogen in this system? ...
AP Chemistry Summer Assignment
... 73.An open flask contains 0.200 mol of air. Atmospheric pressure is 745 mmHg and room temperature is 68˚F. How many moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚C? 74.On a warm day, an amusement park balloon is filled with 47.8 g He. The temperature is 33˚C ...
... 73.An open flask contains 0.200 mol of air. Atmospheric pressure is 745 mmHg and room temperature is 68˚F. How many moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚C? 74.On a warm day, an amusement park balloon is filled with 47.8 g He. The temperature is 33˚C ...
Atomic Structure Tick Sheet
... I know that all atoms of the same element have the SAME number of protons. I know that atoms of DIFFERENT elements have DIFFERENT numbers of protons. I know that the ATOMIC NUMBER of an atom is the BOTTOM NUMBER next to the symbol for the element in the Periodic Table. I know that the ATOMIC NUMBER ...
... I know that all atoms of the same element have the SAME number of protons. I know that atoms of DIFFERENT elements have DIFFERENT numbers of protons. I know that the ATOMIC NUMBER of an atom is the BOTTOM NUMBER next to the symbol for the element in the Periodic Table. I know that the ATOMIC NUMBER ...
Ductility-the ability to be stretched into wires
... • Does the paper change its chemistry (chemical identity) and form a new substance with different properties? • Is the ability to be torn a physical or chemical property? – Physical Property: Property that can be tested/observed without changing chemical identity of the substance; can be undone ...
... • Does the paper change its chemistry (chemical identity) and form a new substance with different properties? • Is the ability to be torn a physical or chemical property? – Physical Property: Property that can be tested/observed without changing chemical identity of the substance; can be undone ...
FINAL EXAM REVIEW
... intermolecular force of attractions would form between the molecules of: a) CH4 b) H2 c) PO4-3 ...
... intermolecular force of attractions would form between the molecules of: a) CH4 b) H2 c) PO4-3 ...
Review - Final Exam
... pure substances? Explain. How can the other term apply to substances and mixtures? Use examples to explain why. 7. What is the difference between: an element and a compound, an element and an atom, a compound and a molecule, & an element and an ion? Is it possible to have a molecule of an element? E ...
... pure substances? Explain. How can the other term apply to substances and mixtures? Use examples to explain why. 7. What is the difference between: an element and a compound, an element and an atom, a compound and a molecule, & an element and an ion? Is it possible to have a molecule of an element? E ...
Florida`s - Wavefunction, Inc.
... Standard 10: Energy A. Energy is involved in all physical and chemical processes. It is conserved, and can be transformed from one form to another and into work. At the atomic and nuclear levels energy is not continuous but exists in discrete amounts. Energy and mass are related through Einstein's e ...
... Standard 10: Energy A. Energy is involved in all physical and chemical processes. It is conserved, and can be transformed from one form to another and into work. At the atomic and nuclear levels energy is not continuous but exists in discrete amounts. Energy and mass are related through Einstein's e ...
Study Guide for Quiz II
... Molecular Type (i.e. AB2E2) Electron Pair Geometry (name and sketch) ...
... Molecular Type (i.e. AB2E2) Electron Pair Geometry (name and sketch) ...
Honors Chemistry Ms. K Pages 66
... While Fred was babysitting his younger brother, Phil, he noticed that Phil was trying to stick a magnet on the screen of their black-and-white television. The magnet did not stick to the glass, but the picture seemed to be distorted. The closer he held the magnet to the screen, the more the images b ...
... While Fred was babysitting his younger brother, Phil, he noticed that Phil was trying to stick a magnet on the screen of their black-and-white television. The magnet did not stick to the glass, but the picture seemed to be distorted. The closer he held the magnet to the screen, the more the images b ...
File
... B. freezing C. both A and B D. neither A nor B 95. What happens during a phase change? A. Energy is added and temperature increases B. Energy is taken away and temperature decreases C. Energy is added or removed and temperature stays the same D. None of the above 96. What is specific heat? A. a meas ...
... B. freezing C. both A and B D. neither A nor B 95. What happens during a phase change? A. Energy is added and temperature increases B. Energy is taken away and temperature decreases C. Energy is added or removed and temperature stays the same D. None of the above 96. What is specific heat? A. a meas ...
1. some basic concepts of chemistry
... Illustration: If we take 10L each of NH3, N2, O2 and CO2 at the same temperature and pressure, all of them contain the same number of moles and molecules. DALTON’S ATOMIC THEORY The term atom was first used by John Dalton from the Greek word a-tomio (means indivisible). He proposed the first atomic ...
... Illustration: If we take 10L each of NH3, N2, O2 and CO2 at the same temperature and pressure, all of them contain the same number of moles and molecules. DALTON’S ATOMIC THEORY The term atom was first used by John Dalton from the Greek word a-tomio (means indivisible). He proposed the first atomic ...
James Moir as Inorganic Chemist
... maintained that He and Ne were probably true elements, whereas Ar, Kr and Xe were not. Finally, he assumed the definite metals to contain hydrogen as the cause of their electro-positiveness, and that the sub-atom x conferred electro-negativeness. So his four building blocks were: Zoikon z, sub-atom ...
... maintained that He and Ne were probably true elements, whereas Ar, Kr and Xe were not. Finally, he assumed the definite metals to contain hydrogen as the cause of their electro-positiveness, and that the sub-atom x conferred electro-negativeness. So his four building blocks were: Zoikon z, sub-atom ...
Chapter 1 Matter and Energy Classifying Matter – An Exercise
... Metals can be distinguished from nonmetals by the luster and ability to conduct electricity. Since we do not know how each of elements in Figure 1.4 conduct electricity, we need to use luster as our measure. Nonmetals are usually dull, with the exception of carbon (as diamond). Elements that are gas ...
... Metals can be distinguished from nonmetals by the luster and ability to conduct electricity. Since we do not know how each of elements in Figure 1.4 conduct electricity, we need to use luster as our measure. Nonmetals are usually dull, with the exception of carbon (as diamond). Elements that are gas ...
History of chemistry
The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that would eventually form the basis to the various branches of chemistry. Examples include extracting metals from ores, making pottery and glazes, fermenting beer and wine, extracting chemicals from plants for medicine and perfume, rendering fat into soap, making glass, and making alloys like bronze.The protoscience of chemistry, alchemy, was unsuccessful in explaining the nature of matter and its transformations. However, by performing experiments and recording the results, alchemists set the stage for modern chemistry. The distinction began to emerge when a clear differentiation was made between chemistry and alchemy by Robert Boyle in his work The Sceptical Chymist (1661). While both alchemy and chemistry are concerned with matter and its transformations, chemists are seen as applying scientific method to their work.Chemistry is considered to have become an established science with the work of Antoine Lavoisier, who developed a law of conservation of mass that demanded careful measurement and quantitative observations of chemical phenomena. The history of chemistry is intertwined with the history of thermodynamics, especially through the work of Willard Gibbs.