'G water' diaporamas de présentation

JEOPARDY!

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(11) Science concepts. The student understands the energy changes that occur in chemical reactions. The student is expec

(11) Science concepts. The student understands the energy changes that occur in chemical reactions. The student is expected to: (A) understand energy and its forms, including kinetic, potential, chemical, and thermal energies;

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3/27 Notes on Mixtures

3/27 Notes on Mixtures. Which of the following equations shows conservation of mass in the reaction between sodium and water? Na + H 2 O H 2 + NaOH Na + 4 H 2 O 2H 2 + 4 NaOH 4Na + 4H 2 O 2H 2 + 4NaOH Draw diagram:.

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Heat (q)

Heat (q). Heat : the transfer of energy between objects due to a temperature difference Flows from higher-temperature object to lower-temperature object. If T 1 > T 2 q system = - exothermic. System (T 1 ). Heat. Surroundings (T 2 ). If T 1 < T 2 q system = + endothermic.

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Pre-lab 6

Pre-lab 6. Items Covered In This Lab. 1. Problems : Dilution and Concentration 2. Prescriptions : 1) Castor oil emulsion 2) BaSO 4 enema 3) Turpentine oil enema. DILUTION AND CONCENTRATOIN (P: 40). Add 100 ml water. 1 gm NaCl in 200 ml solution . 1 gm NaCl

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Chapter 9 Solutions

Chapter 9 Solutions. 9.5 Solubility. Solubility. Solubility states the maximum amount of solute that dissolves in a specific amount of solvent at a particular temperature. Typically, solubility is expressed as the grams of solute that dissolves in 100 g of solvent, usually water.

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1) How many moles of water are in an 82.3g sample?

1) How many moles of water are in an 82.3g sample?. 82.3g water. 1mole water. =. x. 1. 18.02g water. 4.57 mole water. 2) How many grams of oxygen are in a sample of gas that has a volume of 8.61L at STP?. 32g O 2. 8.61L O 2. 1 mole O 2. x. x. =. 1. 22.4L O 2. 1 mole O 2.

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WAVES ( General waves properties)

WAVES ( General waves properties) . Q. What is a wave? It is a periodic disturbance which allows the transfer of energy (by means of vibration ) from one point to another without the physical transfer of the medium (such as water wave). WAVE. Stationary waves

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Entry Task: April 27 th Friday

Entry Task: April 27 th Friday. Question: What is the molarity of 1.2 moles of calcium carbonate in 1.22 liters of water?. Agenda:. Sign off Discuss Concentration ws Notes on Dilutions HW: Concentration and Dilution ws.

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Open system matter & heat can enter/exit

Open system matter & heat can enter/exit. Isolated system neither matter nor heat can enter/exit e.g. The Universe. surroundings. system. Closed heat but not matter can enter/exit. system. The 1 st Law of Thermodynamics The energy of the universe is constant

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Our Christmas-day at school

Our Christmas-day at school. Chocolate Cookies. You need :. 200g flour 2 tbsp. cocoa powder 125g sugar a bit salt 150g butter 1 egg 50g almonds. How you do it:. Put the flour , cocoa, sugar , butter and the egg in a bowl and knead them Chop the almonds coarsely

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Heat and Temperature Change

Heat and Temperature Change. Definitions Heat and Temperature Change Examples Heat and Phase Change Examples Mechanisms of Heat Flow Conduction Convection Radiation. Heat - Definition. Energy Transfer by non-mechanical means Heating water on stove (chemical/electrical)

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CHEMISTRY CHAPTER 4 PROBLEM SOLVING IN CHEMISTRY

CHEMISTRY CHAPTER 4 PROBLEM SOLVING IN CHEMISTRY. Steps for solving word problems:. 1. Find unknown 2. Find knowns 3. Plan solution 4. Calculate 5. Check. A conversion factor is a ratio with a value of one. Ex. 1 ft = 12 inches 1.00g water = 1 mL water 100 cm = 1m.

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Heat of Fusion

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Solution and solubility

Solution and solubility. Solution : It is a homogenous mixture of two or more substances(solute and solvent).

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Concentration of Solution

Concentration of Solution. Concentration refers to the amount of solute dissolved in a solution. MOLARITY. MOLARITY BY DILUTION. When you dilute a solution, you can use this equation:.

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Measuring Concentrations

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Objective: the Law of Conservation of Matter, the math + the experiment

Objective: the Law of Conservation of Matter, the math + the experiment You need a sheet of paper, a calculator, and a pen/pencil. You will need a handout to do the experiment in the back. The questions on the handout will be done in class, or for homework.

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Solubility

Solubility. Def.: the maximum amount of solute that will dissolve in a given amount of solvent AT a specified temperature and pressure. (expressed in g solute/100 g solvent) Example: g sugar/100 g water What happens to the excess solute if you add more than the maximum?

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