STOICHIOMETRY
... below it write the molar masses of the compounds involved (only if required). Note that you only need to calculate molar masses of compounds if data is given or required in mass units. 2. From the wording in the problem, write a short logical statement linking the given and required components. Abov ...
... below it write the molar masses of the compounds involved (only if required). Note that you only need to calculate molar masses of compounds if data is given or required in mass units. 2. From the wording in the problem, write a short logical statement linking the given and required components. Abov ...
3.5 Empirical Formulas - Mayfield City Schools
... 8. Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO4•xH2O, where x indicates the number of moles of H2O per mole of MgSO4. When 5.061 ...
... 8. Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO4•xH2O, where x indicates the number of moles of H2O per mole of MgSO4. When 5.061 ...
Precipitation Reactions
... • Write ionic and net ionic equations for the following: – (a) Ca(OH)2(aq) + 2 HC2H3O2(aq) ...
... • Write ionic and net ionic equations for the following: – (a) Ca(OH)2(aq) + 2 HC2H3O2(aq) ...
File
... 14. Some elements may exist in two or more forms in the same phase. These forms differ in their molecular or crystal structure, hence their different properties. Ex: Carbon exists as both graphite and diamond (a network solid). Topic Seven: Moles and Stoichiometry 1. A compound is a substance comp ...
... 14. Some elements may exist in two or more forms in the same phase. These forms differ in their molecular or crystal structure, hence their different properties. Ex: Carbon exists as both graphite and diamond (a network solid). Topic Seven: Moles and Stoichiometry 1. A compound is a substance comp ...
No Slide Title
... Copper wire reacts with silver nitrate to form silver metal. What is the oxidizing agent in the reaction? ...
... Copper wire reacts with silver nitrate to form silver metal. What is the oxidizing agent in the reaction? ...
Example 1: An experiment shows that 64g of
... d. Work out the number of mol H2O and the number of mol CuSO4 originally present in the crystals. e. Work out the number of mol H2O which combine with 1 mol CuSO4 in the crystals. f. ...
... d. Work out the number of mol H2O and the number of mol CuSO4 originally present in the crystals. e. Work out the number of mol H2O which combine with 1 mol CuSO4 in the crystals. f. ...
Chapters 1-3 Packet
... --------------------------------------------------------------------------------------------------------------------Target 6: I can write the names and formulas of ionic compounds, molecular/covalent compounds and acids. Ionic Compounds - compound made up of cations and anions Naming ionic compounds ...
... --------------------------------------------------------------------------------------------------------------------Target 6: I can write the names and formulas of ionic compounds, molecular/covalent compounds and acids. Ionic Compounds - compound made up of cations and anions Naming ionic compounds ...
What You Need To Know for the Chemistry Regents Exam
... Substances in a mixture may be separated by their size, polarity, density, boiling and freezing points, and solubility (among others). Filtration and distillation are examples of processes used to separate mixtures. 2. An element is a substance composed of atoms with the same atomic number. They ...
... Substances in a mixture may be separated by their size, polarity, density, boiling and freezing points, and solubility (among others). Filtration and distillation are examples of processes used to separate mixtures. 2. An element is a substance composed of atoms with the same atomic number. They ...
Need
... Substances in a mixture may be separated by their size, polarity, density, boiling and freezing points, and solubility (among others). Filtration and distillation are examples of processes used to separate mixtures. 2. An element is a substance composed of atoms with the same atomic number. They ...
... Substances in a mixture may be separated by their size, polarity, density, boiling and freezing points, and solubility (among others). Filtration and distillation are examples of processes used to separate mixtures. 2. An element is a substance composed of atoms with the same atomic number. They ...
word - My eCoach
... matter and the ability to calculate the mass of products and reactants. As a basis for understanding this concept: a. Students know how to describe chemical reactions by writing balanced equations. b. Students know the quantity one mole is set by defining one mole of carbon 12 atoms to have a mass o ...
... matter and the ability to calculate the mass of products and reactants. As a basis for understanding this concept: a. Students know how to describe chemical reactions by writing balanced equations. b. Students know the quantity one mole is set by defining one mole of carbon 12 atoms to have a mass o ...
Chemistry 199 - Oregon State chemistry
... expanded the definitions of bases and acids to include species that didn't necessarily transfer a proton. A Lewis base donates a pair of electrons to make a new bond. A Lewis acid accepts a pair of electrons to make a new bond. We previously identified ammonia as a base because of its ability to acc ...
... expanded the definitions of bases and acids to include species that didn't necessarily transfer a proton. A Lewis base donates a pair of electrons to make a new bond. A Lewis acid accepts a pair of electrons to make a new bond. We previously identified ammonia as a base because of its ability to acc ...
File - Mr Weng`s IB Chemistry
... A compound is known to be composed of 71.65 % Cl, 24.27% C and 4.07% H. Its molar mass is known (from gas density) is known to be 98.96 g. What is its molecular formula? n(Cl) = 71.65g/35.5gmol-1 = 2.0mol Cl n(C) = 24.27g/12gmol-1 = 2.0mol C n(H) = 4.07g/1gmol-1 = 4.0mol H Cl2C2H4 We divide by lowes ...
... A compound is known to be composed of 71.65 % Cl, 24.27% C and 4.07% H. Its molar mass is known (from gas density) is known to be 98.96 g. What is its molecular formula? n(Cl) = 71.65g/35.5gmol-1 = 2.0mol Cl n(C) = 24.27g/12gmol-1 = 2.0mol C n(H) = 4.07g/1gmol-1 = 4.0mol H Cl2C2H4 We divide by lowes ...
Review Answers - cloudfront.net
... For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) ⇌ PCl3(g) + Cl2(g) a. What is the sign of ΔS° for the reaction? Explain. Since you are going from one mole of a gas to two moles of a gas this syst ...
... For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) ⇌ PCl3(g) + Cl2(g) a. What is the sign of ΔS° for the reaction? Explain. Since you are going from one mole of a gas to two moles of a gas this syst ...
Exam Review
... *19. Hydrazine is a nitrogen-hydrogen compound having the formula N2H4. It is an oily, colourless liquid that freezes at 1.5˚C and boils at 113.5˚C. The principal use of hydrazine and certain compounds derived from it is a rocket fuels, but it is also used in fuel cells, in the treatment of water in ...
... *19. Hydrazine is a nitrogen-hydrogen compound having the formula N2H4. It is an oily, colourless liquid that freezes at 1.5˚C and boils at 113.5˚C. The principal use of hydrazine and certain compounds derived from it is a rocket fuels, but it is also used in fuel cells, in the treatment of water in ...
Section 1e chemical formulae and chemical equations
... d. Work out the number of mol H2O and the number of mol CuSO4 originally present in the crystals. e. Work out the number of mol H2O which combine with 1 mol CuSO4 in the crystals. f. ...
... d. Work out the number of mol H2O and the number of mol CuSO4 originally present in the crystals. e. Work out the number of mol H2O which combine with 1 mol CuSO4 in the crystals. f. ...
chemistry — released form
... The equation below represents a balanced chemical reaction: 2Mg (s) + O2 (g) → 2MgO (s) How many moles of MgO are produced when 7.2 moles of O2 react with excess Mg? A ...
... The equation below represents a balanced chemical reaction: 2Mg (s) + O2 (g) → 2MgO (s) How many moles of MgO are produced when 7.2 moles of O2 react with excess Mg? A ...
PDF (Size: 41K)
... Explain, with reference to the standard electrode potential for sodium and hydrogen, why sodium is manufactured using this method rather than by the electrolysis of aqueous sodium chloride. Na+(aq) + e– ...
... Explain, with reference to the standard electrode potential for sodium and hydrogen, why sodium is manufactured using this method rather than by the electrolysis of aqueous sodium chloride. Na+(aq) + e– ...
File - Mrs. Roy`s Science Class
... •If I have 6 slices of bread, how many sandwiches can I make? •How many slices of cheese and turkey will I need? •If I want to make 38 turkey sandwiches (one for each person in class), how many slices of bread, slices of cheese, and slices of turkey will I need? •How did you perform these calculatio ...
... •If I have 6 slices of bread, how many sandwiches can I make? •How many slices of cheese and turkey will I need? •If I want to make 38 turkey sandwiches (one for each person in class), how many slices of bread, slices of cheese, and slices of turkey will I need? •How did you perform these calculatio ...
Example 1: An experiment shows that 64g of
... experiment with gypsum. Weigh a crucible empty. Weigh accurately about 30 g of gypsum into the crucible. Heat the crucible strongly for 10 minutes. Then allow it to cool, and reweigh. Heat the crucible again; cool and reweigh. The results she obtained are listed below. Mass (in g) Mass of crucible ...
... experiment with gypsum. Weigh a crucible empty. Weigh accurately about 30 g of gypsum into the crucible. Heat the crucible strongly for 10 minutes. Then allow it to cool, and reweigh. Heat the crucible again; cool and reweigh. The results she obtained are listed below. Mass (in g) Mass of crucible ...
Variation in Properties of Group II Compounds
... Each group of elements embodied in the periodic table has their own unique properties. As for group II elements, they are classified as one of the s-block elements, also named as alkaline earth metals. In this essay, the variation in properties of group II elements and their compounds are illustrate ...
... Each group of elements embodied in the periodic table has their own unique properties. As for group II elements, they are classified as one of the s-block elements, also named as alkaline earth metals. In this essay, the variation in properties of group II elements and their compounds are illustrate ...
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.