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How many 0.55 mL 5.5 mL 0.5 mL 550 mL Radio waves at the speed of light, which How many does it takes for a radio to reach Earth from in 7.9 = 10^3 km from Earth? 4.4 times 10^2 min 1.6 times 10^5 min 4.0 times 10^15 min 44 min 2.6 min The point for liquid is K, what is the temperature in Fahrenheit? -452.5 degree F -498.9 degree F *232.2 degree F 131.8 degree F 530.9 degree F What is the volume of a container that contain 14.3 g of a substance having a density of 0.988 g/cm^3? 14.1 cm^3 0.0691 cm^3 14.5 cm^3 141 cm^3 691 cm^3 The recommended daily allowance (RDA) of calcium 1.2 g. Calcium contain 12.0% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium? 0.10 g 0.14 g 1.2 g 10 g 14 g An empty flack's mass is 17.4916 g; it's mass is 43.9616 g when filled with water at 20.0 degree C (d = 0.9982 g/mL). The density of "heavy water" at 20.0 degree C is 1.1053 g/mL. What's is the mass of the flask when filled with heavy water at 20.0 degree C? 29.2573 g 46.8016 g 46.7489 g 43.9140 g An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron) 15 p, 16 nm 15 e 16 p 15 n, 16 e 16 p, 31 n, 16 e 32 p, 31 n, 32 e 16 p, 16 n, 15 e Select the answer that express the result of this calculation with the correct number of significant figures. 13.602 times 1.90 times 3.06/4.2 times 1.4097 = 13.3568 13.357 13.36 13.4 13 Lithium has two naturally occurring isotopes, ^6Li (isotopic mass = 6.015121 amu) and^7Li (isotopic mass = 7.016003 amu). Lithium has an atomic mass of 6.9409 amu. What is the percent abundance of lithium-6? 92.50% 86.66% 46.16% 7.503% 6.080% What is the formula for the ionic compound formed by calcium ions and nitrate ions? Ca_3N_2 Ca (NO_3)_2 Ca_2NO_3 Ca_2NO_2 CaNO_3