Reactions Flowchart
... • Metal Hydroxide Metal oxide + H2O Ca(OH)2 CaO + H2O • Metal Carbonate Metal oxide + CO2 Li2CO3 LiO + CO2 • Metal bicarbonate Metal carbonate+ CO2 + H2O NaHCO3 Na2CO3 + CO2 + H2O •Metal Nitrate Metal Oxide + NO2 + O2 2Mg(NO3)2 MgO + 4NO2 + O2 • Metal Chlorate Metal Chloride + O2 2K ...
... • Metal Hydroxide Metal oxide + H2O Ca(OH)2 CaO + H2O • Metal Carbonate Metal oxide + CO2 Li2CO3 LiO + CO2 • Metal bicarbonate Metal carbonate+ CO2 + H2O NaHCO3 Na2CO3 + CO2 + H2O •Metal Nitrate Metal Oxide + NO2 + O2 2Mg(NO3)2 MgO + 4NO2 + O2 • Metal Chlorate Metal Chloride + O2 2K ...
HONG KONG DIPLOMA OF SECONDARY EDUCATION
... surface by the greenhouse gases such as water vapour, carbon dioxide and methane. Because of the greenhouse effect, the temperature of our Earth is warm enough and suitable for living organisms to survive. On the other hand, there is only a weak greenhouse effect in Mars. Consequently, the surface t ...
... surface by the greenhouse gases such as water vapour, carbon dioxide and methane. Because of the greenhouse effect, the temperature of our Earth is warm enough and suitable for living organisms to survive. On the other hand, there is only a weak greenhouse effect in Mars. Consequently, the surface t ...
Final Exam Study Guide Word document
... 62. When polonium-216 decays by the emission of one alpha particle and two beta particles, the product is the isotope __________. 63. Ionizing radiation is many times more dangerous to biological systems than non-ionizing radiation. The radiation that causes the most damage, if ingested, is ________ ...
... 62. When polonium-216 decays by the emission of one alpha particle and two beta particles, the product is the isotope __________. 63. Ionizing radiation is many times more dangerous to biological systems than non-ionizing radiation. The radiation that causes the most damage, if ingested, is ________ ...
File - Mr. L`s Room
... During/after the change the particles are rearranged forming a brand new substance 14. Why are volume, mass, and length not properties. Give an example. Volume, mass, and length are measurements that do not help to identify a substance. 15. Draw examples of Physical and Chemical changes. Explain how ...
... During/after the change the particles are rearranged forming a brand new substance 14. Why are volume, mass, and length not properties. Give an example. Volume, mass, and length are measurements that do not help to identify a substance. 15. Draw examples of Physical and Chemical changes. Explain how ...
PRACTICE PROBLEMS EXAM 1,2 and 3 1311
... 11) How many molecules of CH4 are in 48.2 g of this compound? 12) A 30.5 gram sample of glucose (C6H12O6) contains __________ mol of glucose. 13) A sample of CH2F2 with a mass of 19 g contains __________ atoms of F. 14) A sample of CH4O with a mass of 32.0 g contains __________ molecules of CH4O. ...
... 11) How many molecules of CH4 are in 48.2 g of this compound? 12) A 30.5 gram sample of glucose (C6H12O6) contains __________ mol of glucose. 13) A sample of CH2F2 with a mass of 19 g contains __________ atoms of F. 14) A sample of CH4O with a mass of 32.0 g contains __________ molecules of CH4O. ...
Atomic number
... Element: a substance made of only one kind of atom, cannot be chemically or physically separated into other substances. ...
... Element: a substance made of only one kind of atom, cannot be chemically or physically separated into other substances. ...
Chapter 6 notes 2015
... ... if there is any difference in the pressure exerted by the two gases, it would be due to the number of particles. however, since we have already stated that the pressures are equal, they must contain equal #’s of particles. Avogadro’s Hypothesis – equal volumes of gases at the same temperatur ...
... ... if there is any difference in the pressure exerted by the two gases, it would be due to the number of particles. however, since we have already stated that the pressures are equal, they must contain equal #’s of particles. Avogadro’s Hypothesis – equal volumes of gases at the same temperatur ...
Stoichiometry: Calculations with Chemical Formulas and
... Plan Because the molar mass of any substance is numerically equal to its formula weight, we first determine the formula weight of glucose by adding the atomic weights of its component atoms. The formula weight will have units of amu, whereas the molar mass has units of g/mol. Solve Our first step is ...
... Plan Because the molar mass of any substance is numerically equal to its formula weight, we first determine the formula weight of glucose by adding the atomic weights of its component atoms. The formula weight will have units of amu, whereas the molar mass has units of g/mol. Solve Our first step is ...
225 Unit 7, Lab 1 - Pope John Paul II High School
... produced (see our The Mole module). Because the mole refers to a standard number of atoms (or molecules), the term can simply be substituted into chemical equations. Thus, the balanced methane equation above can also be interpreted as reading, "one mole of methane reacts with two moles of oxygen to ...
... produced (see our The Mole module). Because the mole refers to a standard number of atoms (or molecules), the term can simply be substituted into chemical equations. Thus, the balanced methane equation above can also be interpreted as reading, "one mole of methane reacts with two moles of oxygen to ...
Ch. 16 Study Guide
... forward and backward reaction rates are equal. 3. Equilibrium does not mean that all concentrations are equal!! 4. equilibrium constant, K: the ratio at equilibrium of the concentrations of products raised to their stoichiometric coefficients divided by the concentrations of reactants raised to thei ...
... forward and backward reaction rates are equal. 3. Equilibrium does not mean that all concentrations are equal!! 4. equilibrium constant, K: the ratio at equilibrium of the concentrations of products raised to their stoichiometric coefficients divided by the concentrations of reactants raised to thei ...
Bonding 1. Which one of the following is most likely to be an ionic
... 2. The initial rate of the reaction PCl5 → PCl3 + Cl2 is increased a factor of four when the concentration of PCl5 is doubled. Therefore, the rate a. depends on the concentrations of PCl3 and Cl2. b. is first order with respect to PCl5. c. is second order with respect to PCl5. d. is fourth order wi ...
... 2. The initial rate of the reaction PCl5 → PCl3 + Cl2 is increased a factor of four when the concentration of PCl5 is doubled. Therefore, the rate a. depends on the concentrations of PCl3 and Cl2. b. is first order with respect to PCl5. c. is second order with respect to PCl5. d. is fourth order wi ...
Unit 1: Stoichiometry
... Qualitative analysis is carried out to identify the composition of a substance or a mixture. The focus is on determining which chemicalspecies are present in a sample. Quantitative analysis involves identifying the quantity of each species is present in a sample. Percentage Composition is a type of ...
... Qualitative analysis is carried out to identify the composition of a substance or a mixture. The focus is on determining which chemicalspecies are present in a sample. Quantitative analysis involves identifying the quantity of each species is present in a sample. Percentage Composition is a type of ...
SAMPLE PAPER -2 Time Allowed: 3 Hrs
... (ii) A doctor advised a person suffering from high blood pressure to take less quantity of common salt. OR (a) Calculate the boiling point of a solution containing 0.61g of benzoic acid in 5 g of CS2 .Assuming 84% dimerisation of acid. The boiling point and Kb of CS2 are 46.2 0C and 2.3 K Kg mol-1 r ...
... (ii) A doctor advised a person suffering from high blood pressure to take less quantity of common salt. OR (a) Calculate the boiling point of a solution containing 0.61g of benzoic acid in 5 g of CS2 .Assuming 84% dimerisation of acid. The boiling point and Kb of CS2 are 46.2 0C and 2.3 K Kg mol-1 r ...
Matter – Properties and Changes 1 Intensive properties
... Made predictions of elements not yet discovered by analyzing similarities among elements and patterns of repetition; predictions were accurate. ...
... Made predictions of elements not yet discovered by analyzing similarities among elements and patterns of repetition; predictions were accurate. ...
Chemical Formulas and Chemical Compounds
... 11. Nicotine has the formula CxHyNz. To determine its composition, a sample is burned in excess oxygen, producing the following results: 1.0 mol of CO2 0.70 mol of H2O 0.20 mol of NO2 Assume that all the atoms in nicotine are present as products. a. Determine the number of moles of carbon present in ...
... 11. Nicotine has the formula CxHyNz. To determine its composition, a sample is burned in excess oxygen, producing the following results: 1.0 mol of CO2 0.70 mol of H2O 0.20 mol of NO2 Assume that all the atoms in nicotine are present as products. a. Determine the number of moles of carbon present in ...
1. Which of the following statements best describes the
... Dalton’s atomic theory postulates that atoms are indivisible and indestructible, and that all atoms of a given element are identical in mass and properties. Which of the following discoveries led to modifications of Dalton’s atomic theory? I. II. ...
... Dalton’s atomic theory postulates that atoms are indivisible and indestructible, and that all atoms of a given element are identical in mass and properties. Which of the following discoveries led to modifications of Dalton’s atomic theory? I. II. ...
File
... Iodine is a black, shiny, non-metallic solid and a member of Group VII. It sublimes easily on heating to give a purple vapour. A sample of iodine vapour of mass 6.35 g has a volume of 1.247 dm3 when maintained at constant temperature and a pressure of 1.00 × 105 Pa. If iodine vapour acts as an ideal ...
... Iodine is a black, shiny, non-metallic solid and a member of Group VII. It sublimes easily on heating to give a purple vapour. A sample of iodine vapour of mass 6.35 g has a volume of 1.247 dm3 when maintained at constant temperature and a pressure of 1.00 × 105 Pa. If iodine vapour acts as an ideal ...
Topic 5 Reacting masses and chemical equations notes
... shows the actual number of each type of atom present. However for ionic substances and macromolecules, which have giant structures, the formula shows the ratio of ions or atoms of each type. We can use valencies to help us work out the formula of a compound. The valency of an element is the number o ...
... shows the actual number of each type of atom present. However for ionic substances and macromolecules, which have giant structures, the formula shows the ratio of ions or atoms of each type. We can use valencies to help us work out the formula of a compound. The valency of an element is the number o ...
Stoichiometry
Stoichiometry /ˌstɔɪkiˈɒmɨtri/ is the calculation of relative quantities of reactants and products in chemical reactions.Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated. Conversely, if one reactant has a known quantity and the quantity of product can be empirically determined, then the amount of the other reactants can also be calculated.As seen in the image to the right, where the balanced equation is:CH4 + 2 O2 → CO2 + 2 H2O.Here, one molecule of methane reacts with two molecules of oxygen gas to yield one molecule of carbon dioxide and two molecules of water. Stoichiometry measures these quantitative relationships, and is used to determine the amount of products/reactants that are produced/needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry. In the example above, reaction stoichiometry measures the relationship between the methane and oxygen as they react to form carbon dioxide and water.Because of the well known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine quantities by weight in a reaction described by a balanced equation. This is called composition stoichiometry.Gas stoichiometry deals with reactions involving gases, where the gases are at a known temperature, pressure, and volume and can be assumed to be ideal gases. For gases, the volume ratio is ideally the same by the ideal gas law, but the mass ratio of a single reaction has to be calculated from the molecular masses of the reactants and products. In practice, due to the existence of isotopes, molar masses are used instead when calculating the mass ratio.