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- A volumetric calcium analysis on triplicate samples of the blood serum of a patient believed to be suffering from a hyperparathyroid condition produced the following data: mmol Ca/L = 3.15, 3.25, 3.26. What is the 95% confidence interval for the mean of the data, assuming no prior information about the precision of the analysis?Use the figure below (Figure F01-7-8) to answer this question. Temperature Anomaly (°C) 106 [OSS [ [(4 10% COD -€62 · [(14) -€0.06 Annual mean 15 year mean 1:00:3 130233 1840) Which statement is a correct interpretation of the data depicted in the plot? The mean global temperature has decreased by ~0.9 °C since 1880. O The mean global temperature has increased by ~0.9 °C since 1880. O The mean global temperature has increased by ~1.1 °C since 1880. The mean global temperature has decreased by ~1.1 °C since 1880. The mean global temperature has increased and decreased since 1880 but overall, the temperature has remained constant.nerican Politics X #0 Module 2 | OWLv2 m/takeAssignment/takeCovalentActivity.do?locator=assignment-take Submit Answer Q Search Use the References to access important values if needed for this question. A sample of oxygen gas at a pressure of 0.756 atm and a temperature of 109°C, occupies a volume of 510. mL. If the gas is heated at constant pressure until its volume is 673 mL, the temperature of the gas sample will be °C. OWLv2 | Online teaching and lear X + Retry Entire Group LDE 9 more group attempts remaining NO W 200 Pr Previous Next> deleta SID 5:21 5/14/20
- 3.1524 g HCI (FW 36.46) was diluted with 45 mL water and titrated with 1.0149 M NAOH (FW 40) using methyl red as indicator. 28.02 mL of NAOH was required to neutralize the HCI. Calculate the percentage w/w of HC. Record your answer in decimal notation to 2 decimal places. Answer = % w/w %3Db Answered x Co. How to Ca x N NSU Logir x PeriodicTa XM Action Rec X 0 mySigTau X G 4.25 ml to X NBA Final xG scientific c X + w.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] In 1897 the Swedish explorer Andreé tried to reach the North Pole in a balloon. The balloon was filled with hydrogen gas. The hydrogen gas was prepared from iron splints and diluted sulfuric acid. The reaction is Fe(s) +H2SO4 (ag) → FESO4(aq) + H2 (g) The volume of the balloon was 4800 m and the loss of hydrogen gas during filling was estimated at 20.%. What mass of iron splints and 98% (by mass) H2SO4 were needed to ensure the complete filling of the balloon? Assume a temperature of 0°C, a pressure of 1.0 atm during filling, and 100% yield. Mass of Fe = Mass of H2SO4 g Submit Answer Try Another Version 3 item attempts remaining Previous Next Email Instructor Save and Exit Cengage Learning | Cengage Technical SupportA new procedure for the rapid determination of sulphur in kerosene was tested on a sample known from its method of preparation to contain 0.123% S (µ = 0.123% S). The results for % S were 0.112, 0.118, 0.115, and 0.119. Determine whether the data indicate that there is a bias in the method at the 95% confidence level
- If PCL5=0.012 and PCL3 =0.068 and Cl2=0.068 And the fraction of PCl5 has decomposed is 0.85 which of the following are trueBe sure to answer all parts. Fluorite, a minéral of calcium, is a compound of the metal with fluorine. Analysis shows that a 10.78-g sample of fluorite contains 5.520 g of calcium. Calculate the following: (a) Mass of fluorine in the sample. 19.00 g F (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % FThe combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) --> 16CO2(g) +18H2O(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? C. According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.
- Two groups did the Chem 16.1 Experiment 10 with exactly the same mass of Mg, temperature, and barometric pressure. Group X used a 50-mL eudiometer while Group Y used a longer 100-mL eudiometer. After the experiment, both groups observed a Case A scenario. Additionally, they noted that the group using the longer eudiometer recorded a higher h. How would the volume readings in their eudiometers compare? a. Group X < Group Y b. Group X = Group Y c. Indeterminate d. Group X > Group Y37 - + Sota) - Sco(@)) + 540(6) What wellume (in L) of oxygen at STP is required to produce 48.0 L of CO.(d) at SATP? Express your answer with three significant digits. De not include units! CH) Mat) A sample of rainwater is poured into five test tubes. A different indicator is added to each test tube. Four of the observations are recorded in the following table Indicator bromocresol green blue phenolphthalein methyl red phenol red chlorophenol red Colour ? colourless yellow yellow The colour of the chlorophenol red indicator would be red An unknown ionic solid is dissolved in distilled water to make a blue aqueo following cations did the ionic solid most likely contain? Il Proctorio is sharing your screen. Stop sharing DELL Hide a green flame. Which cUnit 7A: RA--Chemical Reactions and Stoichiometry 15/20 answered Close Homework . Due in 4 hours Molten iron and carbon dioxide gas are products in the industrial iron making process which passes carbon monoxide through molten iron ore, Fe203, at 1500°C. Write a balanced chemical equation for the production of iron. Chem 7 8 9 H 4 6 1 2 3 mol y g mol-1 DI + || SHOW