As a result of a manufacturing error, a thermometer was miscalibrated by +2˚C. If this thermometer was used in this experiment, would it cause the determined molar mass to be higher, lower or the same as if would be had a properly calibrated thermometer
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As a result of a manufacturing error, a thermometer was miscalibrated by +2˚C. If this thermometer was used in this experiment, would it cause the determined molar mass to be higher, lower or the same as if would be had a properly calibrated thermometer been used? Explain.
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- The mass of magnesium used in this experiment is critical to determining the moles of hydrogen gas generated. The analytical balances used in Chemistry 1A labs are very sensitive to point that touching materials with your fingers before measuring them can affect the measurements. The balances are sensitive enough to detect dirt and oils from your fingers transferred to the magnesium. Would your experimental value of R increase or decrease if the mass of magnesium measured was artificially high due the touching it with your hands? Increase DecreaseA researcher has developed a new analytical method to determine the percent by mass iron in solids. To test the new method, the researcher purchases a standard reference material sample that is 2.85% iron by mass. Analysis of the iron standard returns values of 2.75%, 2.89%, 2.77%, 2.81%, and 2.87%. Are the results of the new method significantly different from the standard reference sample? (Hint: Use Confidence Interval)0.45 mol ethanol V= ? L Express your answer using two significant figures.
- Suppose you measure out 1.080 moles of sodium chloride on the balance. If the weigh boat containing the sodium chloride itself weighs 1.43 g, what would the total measurement (sodium chloride + weigh boat) read?Perform Dixon's Q-test for the following data points. Make a conclusion to reject or retain the outlier. Show your calculation. Given: Mass of 1 -peso coin collected from Experiment 11. During the set-up of a distillation or a boiling point apparatus, the position of the bulb of the thermometer is crucial. Why is it so important to obtain accurate results?
- A student conducted the Gravimetric Analysis of Phosphorus in Fertilizer experiment. The student used 2.00g of fertilizer and produced 1.43 g of product. Calculate the % of reported P(P2O5) in the fertilizer sample. Write answer to three significant figures. No units or % sign in answer.Using the mass of the empty beaker and the mass of the beaker + KOH, calculate the mass of KOH added. Then, convert this mass, to the number of moles of KOH added. g=grams Mass of empty beaker= 30.128g Mass of beaker and KOH=33.629g1. What does simple distillation data from the same mixture would look like? 2. Why does the temperature on the thermometer decrease after collecting the first fraction before increasing to the second fraction?
- What is the maximum mass of pure titanium that could be extracted from 3.0 kg of ilmenite, a titanium ore with the chemical formula FeTiO,? Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits. x10A garage manager must determine the number of metal ball bearings (BBs) in a stock container by mass measurements. He counts out 5 BBs and finds their total mass to be 1.9 g. He also finds the total mass of the stock container and the BBs to be 239.3 g and the mass of an identical, empty stock container to be 115.8 g. The store manager then uses his data to calculate the number of BBs in the stock container: Average mass of one BB = 1.9/5 = 0.4 g Mass of BBs in container = 239.3 g - 115.8 g = 123.50 g Number of BBs in container = 123.50/0.4 g= 300 BBs (a) Evaluate the manager’s calculations with regard to significant digits. If necessary, rewrite any steps, recalculating with the adjusted quantities. For any step that you have to rewrite, explain why the manager’s calculation is in error. (b) Should the manager regard the answer to the calculation in (a) as a perfect measure of the number of ball bearings in the container? (c) How could the manager have changed his procedure to…How many kilograms of mercury (density 13.63 g/mL) would fit into a rectangular container with dimensions 46.3 cm × 4.14 cm × 1.841 cm? Show complete calculations with sig fig.