Presentation on theme: "15. Its December and you want to heat up your pool. Ice is starting to form on it and you want it raised to 80 o F (27 o C) Using an electric heater, how."— Presentation transcript:
15. Its December and you want to heat up your pool. Ice is starting to form on it and you want it raised to 80 o F (27 o C) Using an electric heater, how much will it cost if 1 kilowatt-hour is 10 cents? The pool is 6.0 meters long, 4.0 meters wide and 2.0 meters deep. A. Whats the volume in cubic meters? ______ B. What is the volume in cubic centimeters?___________ C. What is the total grams of the water? _____________ A calorie is defined as the energy needed to raise one gram of water one degree Celsius. D. How many calories will it take to raise the pool water from freezing to 27 o C? _______________ E. 1 kilowatts hour=859,800 calories. How many kilowatt-hours will you need? ____________ F. How much will it cost to heat the pool from 32 o F(0 o C) to 80 o F (27 o C)? _______________ 14. Metric facts: 1 meter was originally defined as the distance from equator to north pole divided by? __________ One tenth of a meter is called a __________ How many centimeters (cm) in one meter? ______ How many millimeters (mm) in one meter? The volume of 1,000 cubic centimeters (cm 3 or cc) is called a liter. How many milliliters (mL) are in a liter? __________ A milliliter (mL) is what fraction of a liter? ________ A milliliter is how many cubic centimeters? _______ A cubic centimeter of water has the mass of how many grams? _____ A liter of water has the mass of how many grams? _____ 16. Aquick way to do an approximate conversion in your head for Fahrenheit to Celsius is to subtract 30, add 5, and then cut in half. For Celsius to Fahrenheit, double then add 25. Use this method for the following conversions. 37 o C to o F: ______ 25 o C to o F: ______ 10 o C to o F: ______ 80 o C to o F: ______ 62 o F to o C: ______ 103 o F to o C: ______ 73 o F to o C: ______ 122 o F to o C: ______
Preservative/antioxidant Waste product Composition of casts Vinegar Active ingredient Sulfuric acid Accelerates algae growth Component of gunpowder Barnyard waste product Aids digestive tract xrays Preservative in dried fruit Used in rocket fuel Used in fireworks Causes blue-baby syndrome Instant heat pack In cold remedy Thickener/pH adjuster Used in explosives In hair products Found in some seeds Combats bitter taste Used in Nazi gas chambers Used to make film Preservative many are allergic to Found in fertilizer In cassava root A B C D E F G H I J K L C M N O P Q R S T U V W X Y Z T V Z
17. Find pictures on the photo page that relate to the polyatomic ion listed. Find the number of pictures indicated. Place the letter from the photo next to the ion. Ammonium(2): ____ ____ Chlorate(2): ____ ____ Hypochlorite(1): ____ Perchlorate(2): ____ ____ Acetate(3): ____ ____ ____ Nitrate(4): ____ ____ ____ ____ Nitrite(3): ____ ____ ____ Sulfite(2): ____ ____ Sulfate(2): ____ ____ Cyanide(2): ____ ____ 18. Write the correct formula next to the name (use formulas in the box) (SO 3 ) 2- (CN) - (SO 4 ) 2- (ClO) - (ClO 2 ) - (ClO 3 ) - Acetate: ___________ Ammonium: ________ Chlorate: ________ Hypochlorite: ________ Perchlorate: ________ Chlorite: ________ Cyanide: ________ Nitrate: ________ Nitrite: ________ Sulfite: ________ Sulfate: ________ (ClO 4 ) - (NO 2 ) (NO 3 ) - (NH 4 ) + (C 2 H 3 O 2 ) - 19. Write the correct formula for the following compounds Magnesium nitrate: ____________ Lithium nitrite: ___________ Magnesium chlorate: ____________ Hydrogen cyanide: ______________ Ammonium sulfate: ____________ Barium nitrite: ______________ Sodium sulfite: _______________ Calcium acetate: _________________ 20. Original meanings A. Atom is derived from atomos, what does that mean? B. Electron comes from the Greek word for amber. Why? C. Where does the word, Chemistry come from?
Dry human skin ( ++++++ ) Leather Rabbit fur Glass Human hair Nylon Wool Lead Silk Aluminum Paper Cotton ( + ) Neutral There are very few materials that do not tend to readily attract or give up electrons when brought in contact or rubbed with other materials. Steel ( 0 ) Collects negative charges The following list of materials will attract electrons when brought in contact with other materials, especially those that give up electrons. They are in the order of least apt to attract electrons to those that readily attract electrons. Wood ( - ) Amber Hard rubber Nickel, Copper Brass, Silver Gold, Platinum Polyester Styrene (Styrofoam) Saran Wrap Polyurethane Polyethylene (like Scotch Tape) Polypropylene Vinyl (PVC) Silicon Teflon ( - - - - - - )