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- Suppose you have 150. mL of a substance with a density of 42.0 g/dm3 and want to determine the mass of the substance. The calculation can be broken down into three steps. First, convert the volume from milliliters to liters. Then, convert the volume from liters to cubic decimeters. Finally, determine the mass of the sample in grams. Show the unit analysis by placing the correct components into the unit‑factor slots. The question marks (?) represent the answer to the previous step.You want to produce a 50 g sample of glucose by evaporating to dryness a quantity of glucose solution containing 8% glucose by mass. The density of the glucose solution is 1.15 g/mL. What volume of glucose solution, in liters, must be taken for this purpose?The diameter of a copper (Cu) atom is roughly 1.3 x10-10 m. How many times can you divide evenly apiece of 10-cm copper wire until it is reduced to twoseparate copper atoms? (Assume there are appropriate tools for this procedure and that copper atoms arelined up in a straight line, in contact with each other.)Round off your answer to an integer.
- Gypsum is the hydrate of calcium sulfate, CaSO4 · 2 H2O. It is the primary material in sheet rock, used to make walls in houses. If you heat 23.42 g of the hydrate and drive off the water, what is the weight of the anhydrous salt remaining? Report your response to the proper degree of certainty and include the correct unit symbol (i.e., g, mL, km, etc.).Given the following data for Mass of test tube and stearic acid = 14.17 gMass of test tube = 11.40 gFreezing point of strearic acid = 69.59o CMass of weighing paper + naphthalene =1.230 gMass of weighing paper = 0.920 gFreezing point solution = 64.00o CKf = 4.5o C/m Determine the following1. mass of stearic acid in g (2 decimal places); 2.77g2. mass of naphthalene in g (2 decimal places); 0.31g3. freezing point depression (2 decimal places); 3.93oC4. molality of solution (3 significant figures); _____5. moles of naphthalene (3 significant figures); _____6. molar mass of naphthalene, experimentally (3 significant figures); _____7. % error if theoretical molar mass of naphthalene is 128.17 g/ mole, USE ABSOLUTE VALUE (3 significant figure); _____Please answer g please In the table below, use your most important scientific instrument (your calculator) to fill in the little boxesthat are highlighted:2. Data TableIdentity of Dehydrated salt (for afterwards) ________________________________ Mass of empty dish 70.874g Mass of dish + hydrated salt 71.346g Mass of hydrated salt Mass of dish + dehydrated salt XXXXXXX a) first heating 71.194g b) second heating 71.174g Mass of dehydrated salt Mass of water lost Wt. % of water in hydrated salt Moles of dehydrated salt Moles of water driven off Empirical formula of hydrated salt a. Show the calculation for obtaining the mass of your hydrated salt used.b. Show the calculation for obtaining the mass of your dehydrated salt after the second heating.c. Show the calculation for obtaining the mass of water that was driven off (based on secondheating).d. Show the calculation for obtaining the weight percent of water that was in your hydrated…
- Complete the following table by calculating values for the two serial dilutionsPure oxygen diffuses through an aperture in 224 seconds, whereas a mixture containing 80% oxygen gas and gas Y diffuses from the same aperture in 225 seconds. Which of the following most probably is gas?In the year 2013, an estimated amount of 36 billion metrictons (1 metric ton = 1000 kg) of carbon dioxide 1CO22 wasemitted worldwide due to fossil fuel combustion and cementproduction. Express this mass of CO2 in grams without exponentialnotation, using an appropriate metric prefix
- The mass of an iron nail is measured before and after being placed in a beaker of water for 2 days. It is found that 0.059 g of iron (3) oxide (rust) was produced over the 2-day period. What mass of iron in the nail reacted with the water? Assume the nail is pure ironConvert 4.58 * 103cm3to each unit.a. L b. mL c. gal d. qtThe m in the equation for density is in italic type, meaning that itstands for mass rather than for meters. In general, the symbols forunits such as meters (m), seconds (s), or kelvins (K) appear inregular type, while those for variables such as mass (m), volume (V),and time (t) appear in italics.In a clean and dry crucible with cover weighing 24.342 g some of the unknown hydrate (CuSO4.nH2O) was placed in the crucible to reach a mass of 27.557 g. The crucible was heated several times until it reached a final constant mass of 26.403 g. Use these measurements to complete your data sheet and show complete calculation for the missing values.