Chapter 1, Problem 1.31E

48. Are these data sets on chemical changes consistent with the law of conservation of mass?(a) A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride.(b) An 8-g sample of natural gas completely reacts with 32 g of oxygen gas to form 17 g of carbon dioxide and 16 g of water

4. Given the density of Au is 19.3 g/cm3, determine the mass of gold in an ingot having a volume of 0.015 m3.

A student measures the mass of a piece of aluminum, and finds it to be 8.945 g. She finds that the volume of the aluminum sample is 3.3 cm^3. Find the density of the aluminum sample.

x 100 (100 is exact) e. 9.875 x 102 5. a) At what temperature is the temperature in degrees Fahrenheit equal to twice the temperature in degrees Celsius? b) The average daytime temperatures on earth and Jupiter are 72 °F and 313 K, respectively. Calculate the difference in temperature, in C. between these two planets. 6. For a material to float on the surface of the water, the material must have a density less than that of water (1.0 g/mL) and must not react with the water or dissolve in it. A spherical ball has a radius of 0.50 cm and weighs 2.0 g. Will this ball float or sink when placed in water? (Note: Volume of a sphere r .) 7. a)Using examples, explain the difference between a physical property and a chemical property. b) Do the following statements describe chemical or physical properties? (i) Oxygen gas supports combustion. (ii) Fertilizers help to increase agricultural production. ii) Water boils below 100°C on top of a mountain. (iv) Lead is denser than aluminum. (v) Uranium…

On the planet Xgnu, the most common units of length are the blim (for long distances) and the kryll (for shorter distances). Because the Xgnuese have 14 fingers, it is not perhaps surprising that 1400 kryll = 1 blim. Two cities on Xgnu are 21.2 blim apart. What is this distance in kryll?

An electric current of 155.0 mA flows for 42.0 minutes. Calculate the amount of electric charge transported.. Be sure your answer has the correct unit symbol and 3 significant digits. 0 x10 μ 0 9 X

The density of a certain metal is (6.60x10^0) g/cm3.  What is the mass in grams of a sample of this metal that has a volume of (8.460x10^-2) m3? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer:

132. The following statements are all true. (a) Jessica's house is 5 km from the grocery store. (b) Jessica's house is 4.73 km from the grocery store. (c) Jessica's house is 4.73297 km from the grocery store. How can they all be true? What does the number of digits communicate? What sort of device would Jessica need to make the claim in each statement?

An electric current of 485.0 mA transports 760. uC of charge. Calculate the time this took. Be sure your answer has the correct unit symbol and 3 significant digits. x10 ロ・ロ X μ 3 5