Prelaboratory Assignment: Determination of a Chemical Formula 1. Determine the molar mass of the following compounds:...
1. An atom of Indium-112 contains 49 protons, 63 neutrons, 49 electrons. b. 49 protons, 49 neutrons, 49 electrons. c. 49 protons, 49 alpha particles d. 49 protons, 63 neutrons. 2. Which of the following atomic symbols is incorrect? d. 3. How many atoms of hydrogen are present in 6.43 g of NH? a. 2.27 x 10 b. 1.28 x 10 1.16x 10 d. 6.82 10 4. A 2.55 ml sample of ethylene glycol antifreeze) has a mass of 2.83...
3. write the correct chemical formula for the following compounds, and identify as Type 1, 11, or A. Pentaboron pentahydride B. Magnesium phosphate C. Manganese (IV) peroxide D. Platinium (1) hydrogen carbonate
5. The temperature in an orchard is 0°C. If a farmer sprays 10.0 kg of water at 20°C around the fruit trees and the water cools, then freezes at 0°C, how many kilojoules of energy are released? How does this energy affect the orchard temperature? 6. Classify each of the following as element, compound, homogeneous or heterogeneous mixture: Gasoline, bubbly champagne, coffee with lemon juice, cola drink, sulfur, helium, mercury. Isopropyl alcohol ("rubbing alcohol"), table sugar, common salt, "plaster cast,...
6. A student collects the following data when decomposing a sample of baking soda, NaHCO3. Find the theoretical and percent yield of sodium carbonate. Mass of test tube + NaHCO, 19.151g Mass of test tube 18.002g Mass of test tube + Na2CO; 18.722g a. Mass of NaHCO,: b. Mass of Na2CO, (actual yield): c. Theoretical yield of Na-C0, and percent yield Theoretical yield: Percent yield: 7. A student collects the following data when decomposing an unknown mixture containing baking soda,...
18. Give the chemical formula of the following compounds or ions. Specify charges whenever appropriate. 6pts (a) potassium aquatrichloroplatinate(II) Chemical Formula: (b) sodium hexacyanonickelate(II) Chemical Formula: (c) tetraaquazinc(II) carbonate Chemical Formula:
Write the correct chemical formula for the following compounds, and identify as Type I, II, or III: A. Pentaboron pentahydride B. Magnesium phosphate C. Manganese (IV) peroxide D. Platinium (1) hydrogen carbonate
please help, show work 3. Write the correct chemical formula for the following compounds, and identify as Type 1, II, or II: A. Pentaboron pentahydride B. Magnesium phosphate Type ! Mg3(PO4)2 C. Manganese (IV) peroxide D. Platinium (1) hydrogen carbonate
1. Write a structural formula for each of the following compounds: a. isopropyl methyl ether b. trans-2- pentene oxide c. 3- ethoxyhexan d. ethylene glycol dipropyl ether
(10) (4 pts) Give the correct name for the following compounds. Fe2(CO3) S.O. KMnO4 HS NO PbCl2 Ag Cro HCIO (11) (4 pts) Give the correct chemical formula for the following compounds. Sodium hypobromite Chromium (III) acetate Chloric acid Dinitrogen tetroxide Cobalt(II) hydrogen carbonate Zinc Nitrate Ammonia Ammonium
1. Balance the following chemical reaction: Na2CO3 (aq) +CaCl2 (aq) → CaCO3 (s)+NaCl (aq) Na₂CO₃ + Call, CaCO3 + 2NaCl 2. Using Table 7 below, determine the molar mass of calcium chloride, CaCl2. Table 7: Molar Mass of Calcium Chloride (CaCl2) Atomic Mass Multiply # in Contribution Formula Element Calcium (Ca) g/mol g/mol Chlorine (CI) g/mol g/mol Total = g/mol 3. Using Table 8 below, determine the molar mass of sodium carbonate, Na2CO3. Element Table 8: Molar Mass of Sodium...