Chemistry 106: General Chemistry
... (32) If 4 mol of Neon gas and 6 mol of Krypton gas are contained in a flask whose total pressure is 1000 mmHg, the partial pressure of Neon gas is: (a) greater than the partial pressure of the Krypton gas (b) less than the partial pressure of the Krypton gas (c) the same as the partial pressure of t ...
... (32) If 4 mol of Neon gas and 6 mol of Krypton gas are contained in a flask whose total pressure is 1000 mmHg, the partial pressure of Neon gas is: (a) greater than the partial pressure of the Krypton gas (b) less than the partial pressure of the Krypton gas (c) the same as the partial pressure of t ...
Unit 1 Ch. 2,3,4 notes NEW
... How many moles of nitrogen gas are needed to produce 6.75 mol of NH3 in a reaction with hydrogen gas? (3.38mol) How many moles of silver would be produced if 10.0 mol of silver nitrate reacts with copper metal? (10.0 mol) How many moles of water are produced when 20.6 mol of CH4 burns? (41.2mol) 2:2 ...
... How many moles of nitrogen gas are needed to produce 6.75 mol of NH3 in a reaction with hydrogen gas? (3.38mol) How many moles of silver would be produced if 10.0 mol of silver nitrate reacts with copper metal? (10.0 mol) How many moles of water are produced when 20.6 mol of CH4 burns? (41.2mol) 2:2 ...
3(aq)
... • Burning of coal, which occurs in power plants to create electricity, is a reaction between carbon & oxygen to produce carbon dioxide. C(s) + O2 CO2(g) (a combustion & synthesis rxn) ...
... • Burning of coal, which occurs in power plants to create electricity, is a reaction between carbon & oxygen to produce carbon dioxide. C(s) + O2 CO2(g) (a combustion & synthesis rxn) ...
Chemical change is a process that involves recombining atoms and
... is carefully collected and placed on a scale, its mass is 39.0g. How can it weigh 16g more?? How does this make sense?? ...
... is carefully collected and placed on a scale, its mass is 39.0g. How can it weigh 16g more?? How does this make sense?? ...
How to balance chemical equations File
... see that they’re the same. A law in chemistry, the Law of Conservation of Mass, states, “In an ordinary chemical reaction, matter is neither created nor destroyed.” This means that you have neither gained nor lost any atoms during the reaction. They may be combined differently, but they’re still the ...
... see that they’re the same. A law in chemistry, the Law of Conservation of Mass, states, “In an ordinary chemical reaction, matter is neither created nor destroyed.” This means that you have neither gained nor lost any atoms during the reaction. They may be combined differently, but they’re still the ...
Name ……………………………..………...… …….. Index No
... b) The diagram below shows the apparatus that can be used to electrolyse acidified water to obtain hydrogen and oxygen gases. Study it and answer the questions that follow. ...
... b) The diagram below shows the apparatus that can be used to electrolyse acidified water to obtain hydrogen and oxygen gases. Study it and answer the questions that follow. ...
Unit 9 Chemical Equations and Reactions Balancing Equations Notes
... o ___________________________________: Definition - two or more substances react to form 1 product. Usually releases energy, _____________________________. Combination reactions that contain oxygen as a reactant can also be considered combustion. A + X → AX 4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s) CaO (s) ...
... o ___________________________________: Definition - two or more substances react to form 1 product. Usually releases energy, _____________________________. Combination reactions that contain oxygen as a reactant can also be considered combustion. A + X → AX 4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s) CaO (s) ...
AGE article for Sept 2013
... electrolytes, the predicted cell voltage under standard conditions is 1.23 v, as you would expect, given that both cells would have the same overall reaction. If you know the simple rules that apply, the Electrochemical Series can be used to predict the half reactions that occur in galvanic and elec ...
... electrolytes, the predicted cell voltage under standard conditions is 1.23 v, as you would expect, given that both cells would have the same overall reaction. If you know the simple rules that apply, the Electrochemical Series can be used to predict the half reactions that occur in galvanic and elec ...
Exam Review Chapter 18-Equilibrium
... 10. Which of the following is true concerning the impact of increasing temperature on reaction rates? a. The number of collisions between reactant atoms is increased. b. The energy of each reactant atom is increased. c. The percentage of collisions with sufficient energy to cross the activation ener ...
... 10. Which of the following is true concerning the impact of increasing temperature on reaction rates? a. The number of collisions between reactant atoms is increased. b. The energy of each reactant atom is increased. c. The percentage of collisions with sufficient energy to cross the activation ener ...
CHAPTER 10 - NUCLEAR PHYSICS
... When the elements forming a compound are not present in the exact percent composition ratio during a chemical reaction, one of the reactants will be completely used up. This one is called the limiting reactant. The other reactant(s) that is not completely used up is called the excess reactant. Dalto ...
... When the elements forming a compound are not present in the exact percent composition ratio during a chemical reaction, one of the reactants will be completely used up. This one is called the limiting reactant. The other reactant(s) that is not completely used up is called the excess reactant. Dalto ...
physical and chemical change
... A physical property is a property of a substance that can be observed without changing the substance into another substance. For example, the melting point of a solid is a physical property. Color, hardness, shape and texture are other physical properties. A chemical property is a property of a subs ...
... A physical property is a property of a substance that can be observed without changing the substance into another substance. For example, the melting point of a solid is a physical property. Color, hardness, shape and texture are other physical properties. A chemical property is a property of a subs ...
physical and chemical change
... A physical property is a property of a substance that can be observed without changing the substance into another substance. For example, the melting point of a solid is a physical property. Color, hardness, shape and texture are other physical properties. A chemical property is a property of a subs ...
... A physical property is a property of a substance that can be observed without changing the substance into another substance. For example, the melting point of a solid is a physical property. Color, hardness, shape and texture are other physical properties. A chemical property is a property of a subs ...
File
... A molecule is the smallest, electrically neutral, particle of an element or compound that can exist on its own. An ion is an atom, or group of atoms, which carries an electric charge. ...
... A molecule is the smallest, electrically neutral, particle of an element or compound that can exist on its own. An ion is an atom, or group of atoms, which carries an electric charge. ...
AP Chemistry Unit 5
... o Reactions where there are more product gas molecules than reactant molecules Is S + or -? H2O (l) H2O (g) o positive Ag+ (aq) + Clo negative 4 Fe (s) + 3 O2 o negative ...
... o Reactions where there are more product gas molecules than reactant molecules Is S + or -? H2O (l) H2O (g) o positive Ag+ (aq) + Clo negative 4 Fe (s) + 3 O2 o negative ...
AQA_GCSE_Chemistry_Higher_Unit_2_Notes
... Note that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. SURFACE AREA Solids in powder form will react much more quickly than those in lump form. This is because the powder particles have much more surface area exposed to the other reactant. If a lump ...
... Note that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. SURFACE AREA Solids in powder form will react much more quickly than those in lump form. This is because the powder particles have much more surface area exposed to the other reactant. If a lump ...
Fall Final 2009
... 1. A sample that cannot be separated into two or more substances by physical means is: a. A compound b. An element c. Either a compound or an element d. A homogeneous mixture e. A heterogenous mixture 2. Given the following enthalpies of formation, Hf°: CH4(g), -74.8 kJ/mol; H2O(g), -242 kJ/mol; CO ...
... 1. A sample that cannot be separated into two or more substances by physical means is: a. A compound b. An element c. Either a compound or an element d. A homogeneous mixture e. A heterogenous mixture 2. Given the following enthalpies of formation, Hf°: CH4(g), -74.8 kJ/mol; H2O(g), -242 kJ/mol; CO ...
Chemistry I Exams and Answer Keys 2015 Season
... test tube filled with dilute hydrochloric acid, the metal soon floats to the surface of the liquid. The density of magnesium is 1.79 g·cm–3, and the density of the HCl solution is 1.048 g·cm–3. The best explanation for the metal floating on the liquid is that A. the metal is less dense than the acid ...
... test tube filled with dilute hydrochloric acid, the metal soon floats to the surface of the liquid. The density of magnesium is 1.79 g·cm–3, and the density of the HCl solution is 1.048 g·cm–3. The best explanation for the metal floating on the liquid is that A. the metal is less dense than the acid ...
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.