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Extra info for Chemistry: The Central Science (11th Edition) - Test Bank
738 g/cm3 at 20 'C. what's the vol ume of 87. 50 g of this steel at this temperature? 1. 28 (a) A dice of osmium steel 1. 500 em on a facet has a mass of seventy six. 31 g at 25 'C. what's its density in g/cm3 at its density. utilizing a graduated cylinder, she measured out a 45-mL pattern of the substance. She then measured She knew that the substance needed to be both isopropyl alcohol (density zero. 785 gjmL) or toluene (density zero. 866 /mL). What are the calculated density and the possible identification of the substance? (b) An test calls for forty five. zero g of ethylene glycol, a liquid whose densi ty is 1. 114 gjmL. instead of weigh the pattern on a bal ance, a chemist chooses to dispense the liquid utilizing a graduated cylinder. What quantity of the liquid may still he use? (c) A cubic piece of steel measures five. 00 em on every one part. If the steel is nickel, whose density is eight. ninety g/cm3, what's the mass of the dice? 1. 30 (a) After the label fell off a bottle containing a transparent liq uid believed to be benzene, a chemist measured the den sity of the liquid to make sure its id. A 25. 0-mL element of the liquid had a mass of 21. ninety five g. A chemistry hand publication lists the density of benzene at 15 'C as zero. 8787 g/mL. Is the calculated density in contract with the tabulat ed worth? (b) An test calls for 15. zero g of cyclo hexane, whose density at 25 'C is zero. 7781 g/mL. What quantity of cyclohexane might be used? (c) A round ball of lead has a diameter of five. zero em. what's the mass of the sector if lead has a density of eleven. 34 g/cm3? (The vol ume of a sphere is (�)7Tr'l the place r is the radius. ) 1. 31 Gold might be hammered into tremendous skinny sheets referred to as gold leaf. If a 200-mg piece of gold (density = 19. 32 g/cm3) is hammered right into a sheet measuring 2. four X 1. zero feet, what's the general thickness of the sheet in meters? How may possibly the thickness be expressed with no exponential notation, utilizing a suitable metric prefix? this temperature? (b) The density of titanium steel is 1. 32 A cylindrical rod shaped from silicon is sixteen. eight em lengthy a hundred twenty five. zero mL of water at 25 'C? (c) The density of benzene at 2. 33 g/cm3. what's the diameter of the cylinder? (The benzene at this temperature. dius, and h is its size. ) four. fifty one g/cm3 at 25 'C. What mass of titanium displaces 15 'C is zero. 8787 gjmL. Calculate the mass of zero. 1500 L of and has a mass of two. 17 kg. The density of silicon is quantity of a cylinder is given by way of 1Tr 2h, the place r is the ra Uncertainty in dimension 1. 33 point out which of the subsequent are unique numbers: (a) the mass of a paper clip, (b) the outside quarter of a dime, (c) the variety of inches in a mile, (d) the variety of oz in a pound, (e) the variety of microseconds in per week, (f) the variety of pages during this booklet. 1. 34 point out which of the subsequent are specified numbers: (a) the mass of a 32-oz can of espresso, (b) the variety of scholars on your chemistry classification, (c) the temperature of the skin of the sunlight, (d) the mass of a postage stamp, (e) the variety of milliliters in a cubic meter of water, (f) the common top of scholars on your institution.