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- Dr. Colibrí studies hummingbirds. Each bird requires approximately 9.52 milliliters of nectar every day to stay alive. Synthetic nectar solution is made by mixing 20%(vol/vol) sucrose with 80%(vol/vol)water. Sucrose, common table sugar, has a density of 1.59 g/mL. How many grams of sugar does Dr. Colibri need to keep 7 hummingbirds alive for 63 days? (answer to 2 decimal places) Assumption: When mixing 1 part sugar with 4 parts water, the combined volume does not change. e.g. 200 mL of sugar combined with 800 mL water will produce 1000 mL of nectar. This is technically untrue, but it is close enough for our purposes.How many mL of 12% SDS would you need to make 23 mL of 2 % SDS? Report your answer to 1 decimal place (example: 3.4Question 11 .A sample of Fluorine occupies 65.5 mL at 23.0 oC. Calculate the final volume in mL when the temperature increased to 62.5oC. The final answer is... use the G.U.E.S.S. Method format. V2 = Unit = Blank 1: Blank 2: Please make sure that you convert all temperature readings to Kelvin (K = C + 273). Please make sure to double and triple check your sigfig when entering your answers. All answers should be entered in standard notation (not scientific notation). Please be sure to capitalized the correct letters in your units.
- Stan Moneymaker needs 15 gallons of gasoline to top off his automobile’s gas tank. If he drives an extra eight miles (round trip) to a gas station on the outskirts of town, Stan can save $0.10 per gallon on the price of gasoline. Suppose gasoline costs $3.90 per gallon and Stan’s car gets 25 mpg for in-town driving. Should Stan make the trip to get less expensive gasoline? Each mile that Stan drives creates one pound of carbon dioxide. Each pound of CO2 has a cost impact of $0.02 on the environment. What other factors (cost and otherwise) should Stan consider in his decision making?Convert 0.30 mg L-1 to ppb. Put value without unit.During Normal breathing while resting Abigails lungs contain 751.6mm Hg in 3.1L after inhaling and 762.3 mm Hg in 2.5L after exhaling. If her lungs conatin 0.114 Mol of air after inhaling how many moles if air remain after she exhales? Assume the temperature stays constant 37 degrees Type your answer to the three places past the decimal
- from lowest to highest, 4 being the lowest14 - For CH4 molecule containing avagadro’s number of atoms; I. It is 0,2 moles. II. Contains 4,8x1023 pieces of H atoms. III. It is 4,48 liters in UNC. Which of the statements are corrrect? A) II and III B) Only II C) I and II D) I, II and III E) Only IA previous Chem 100 student carried out the experiment you did by reacting 0.031 g of magnesium. The following data was collected in their lab notebook. The water temperature was 19.8°C. The barometer in the lab read 753 mm Hg and 31.97 mL of gas was collected The vapor pressure of water at this temperature is 17.32 mm Hg. Calculate the student’s experimental value of R. Report your answer to four places after the decimal.