TRUE OR FALSE 10. All matter has a greater density than zero. 11. Molar concentrations are not temperature-dependent. 12. A substance heavier than water has lower specific gravity
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TRUE OR FALSE
10. All matter has a greater density than zero.
11. Molar concentrations are not temperature-dependent.
12. A substance heavier than water has lower specific gravity
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- Explain why the numbers of molecules are not identical in the left- and tight-hand bulbs shown in the center illustration of Figure 9.27.Part D: Food Calories Naked Juice Serving size 240 mL D1. Name of food product D2. Mass of food nutrients in one serving Fat Carbohydrate 33 g, Protein g, D3. Calculations for Calories (Cal) or kilocalories (kcal) per serving kcal (Cal) Carbohydrate Protein kcal (Cal) Fat kcal (Cal) D4. Total Calories (Cal or kcal) per serving kcal (Cal) D5. Calories (for one serving) listed on the label cal (Cal) D6. Percentage of total Calories from carbohydrate % (show calculations) D7. Percentage of total Calories from protein (show calculations) % D8. Percentage of total Calories from fat (show calculations) % Q 4. How does your calculated number of Calories in one serving compare to the Calories listed on the food product nutrition label? Comment on it.14. It determines the phase of a substance. A. its pressure and temperature B. its mass and volume C. its mass D. its kind
- 1. Iron metal rusts in an atmosphere of moist air. a. Physical Propertyb. Chemical Property 2. Mercury metal is a liquid at room temperature.a. Physical Propertyb. Chemical Property3. Silver salts discolor the skin by reacting with skin protein.a. Physical Propertyb. Chemical Property4. Nickel metal dissolves in acid to produce a light green solutiona. Physical Propertyb. Chemical Property 5. Potassium metal has a melting point of 63°C.a. Physical Propertyb. Chemical Property6. Titanium metal can be drawn into thin wires.a. Physical Propertyb. Chemical Property7. Silver metal shows no sign of reaction when placed in hydrochloric acid.a. Physical Propertyb. Chemical Property8. Copper metal possesses a reddish-brown color.a. Physical Propertyb. Chemical Property9. Beryllium metal, when inhaled in a finely divided form, can produce serious lung disease.a. Physical Propertyb. Chemical PropertySCIENCE_Q1_MODULE_5_quantity-really-matters_FINALO. 6. What is the percent by volume of isopropanol in a 90ml solution that contains 25ml isopropanol? a. 26.8 % isopropanol b. 26.9 % isopropanol c. 27.8 % isopropanol d. 27.9 % isopropanol co a1_Science7_Modules 7. What is the volume of a 20% methyl solution that contains 15mL of methyl? a. 6 ml of methyl b. 4 mL of methyl c. 5 ml of methyl d. 3mL of methyl с. 8. What is the percent by mass concentration of a solution that contains 30.0g of sugar dissolved in 150g of water? a. 16.5% b. 16.7% c. 17.6 % d. 17.7% 9. A genuine sterling silver items is 92.5% silver by mass. This means that: a. 92.5 g is silver and 7.5g is another metal (usually copper) b. 0.5 g is silver and 92.5g is another metal (usually copper) c. 46.25g is silver and 46.25g is another metal (usually copper) d. 92.5g of the jewelry is made up of pure silver 10.The following are quantitative descriptions of concentrations, EXCEPT: a. percent by mass b. polarity c. dilute…Part F In volcano vents, sulfur is converted directly from the emitted hot gases to form mounds of solid sulfur. This is an example of Deposition. Boiling. Sublimation. freezing.
- 4. A 100 mL solution was prepared by dissolving 10.00 g of CaSO4 (MW= 136. 14 g/mol) in water. The density of the solution was found to be 1.15 g/ml at 25 C. Find the new boiling and freezing temperature of water in this solution. Answers in 2 decimal places. no need to write the unit. New boiling point = [A] %3D New Freezing point = [B]A. Liquids are moved from one container to another using a pipette, droppers, and volumetric flasks.B. Liquids are kept in beakers, graded cylinders, and Erlenmeyer flasks. - Statement A is correct and statement B is incorrect. - Statement A is incorrect and statement B is correct. - Both statements are correct. - Both statements are incorrect.How many moles of solute in 2.00 L of a 3.00 M solution? The solute could be anything, and the solvent is usually water. The concentration will always be the conversion factor. M stands for mol/L. mol a. 0 j. 100. b. 1 c. 2 L)(-- d. 3 k. 1.71 1. 0.856 e. 4 m. 10.0 f. 5 -) = L g. 6 h. 234 mol i. 58.44
- 1. Give two reasons why one substance might have a greater density than another substance from a molecular point of view. Explain each reasons. 2. What would happen to the water level in a glass if the ice cube floating in a glass of water will be completely melted? 3. Why does a balloon filled with helium gas rise? Is there a lower limit on how much helium gas it must contain before it begins to rise? Explain.Consider equal volumes (say 1 L) of a given substance in the solid, liquid, and gas phases. Arrange them in order of decreasing mass based on the trend for the average substance. If the mass difference between samples is relatively small (10% or less), rank the items as equivalent. Rank from greatest to least mass. To rank items as equivalent, overlap them. • View Available Hint(s) Reset Help 1 L of substance in the solid phase 1L of substance in the gas phase 1L of substance in the liquid phase Greatest mass Least mass3. Carefully put an egg in a glass half filled with vinegar. Replace the vinegar on the second day. Place the covered glass with the vinegar and egg in a safe place for one week without disturbing it. After one week, pass a light through the egg using a flashlight. N.B. DO NOT BOIL AND EAT THE EGG. A. Results and observation. Equation: HC2H3O2 + CaCO3 calcium acetate + H20 + carbon dioxide B. Calculation: If 9.02 x 1024 particles of vinegar (HC2H3O2)HC2H3O2) is added to 16.5 moles of eggshell (CaCO3) and 6.35 moles g of calcium acetate is formed. What are the (a) theoretical yield, (b) actual yield and (c) percent yield
