Suppose the mass of ice, 13 g, is measured with a scale that measures to 0.1 g. Calculate the percent precision (%) of the measured mass of the ice.
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- It is known that the radius of the atoms of a material crystallized in a volume-centered system is H A. Calculate the unit cell length and the atomic fill factorOne mole of atoms consists of 6.02 x 1023individual atoms.If a mole of atoms were spread uniformly over the Earth’ssurface, how many atoms would there be per square meter?a chemist is doing some measurements with a thermometer that is accurate to 1 degree k and a pressure gauge that is accurate to 2 bars. Using the equation for the ideal gas law, V=C T/P, where C is a constant and V is volume, T is temperature in Kelvin and P is pressure in bars, how far off on volume(Leave C in the problem and ignore it) can he be assuming max error on each measurement assuming he measure 13 bars and 340 degrees K?
- There are three sets of thermometer table, the range are all of 0 ~ 800 °C, precision gr ades is 2.5, 2.0 and 1.5, now is to measure the temperature of 500 °C, relative error le ss than 2.5%, choose which instrument is more reasonable?An ideal gas, at pressure 4.9 atmospheres, in a volume 1.1 m3 and at a temperature of 308 K, is compressed into a lower volume 0.44 m3, at a pressure of 6.26 atmospheres. What is the new temperature, in K with two digits of precision?STARTING AMOUNT + X An atom of a particular element has a volume of 6.1 x 10 volume in cubic nanometers? ADD FACTOR *( ) 10" 6.1 10 6.1 x 10 10⁰ 6.1 x 10 10* (10%) pm ANDWER 6.1 10 (10") E (10) 10⁰ What is this RESET 2 (1) (10%)
- the mass m, is given the equation m=i[0.69]t. i is the intitial dose and t is the number of hours since the dose. Suppose the patient is given inital dose of 200mg. When will the amount of ibuprofen in the bloodstream be reduced by a factor of one half. round your answer to the nearest tenth of an hourWhen Ibuprofen is given for fever to children 6 months of age up to 2 years, the usual dose is 5 milligrams (mg) per kilogram (kg) of body weight when the fever is under 102.5 degrees Fahrenheit.1) How much medicine would be usual dose for a 18 month old weighing 20 pounds? Hint: Use unit conversion to express the baby's weight in kg.8. Past experience has indicated that the breaking strength of yarn used in manufactur- ing drapery material is normally distributed and that a 2psi. A random sample of 9 specimens is tested, and the average breaking strength is found to be 98 psi. Find a 95% two -sided confidence interval on the true mean breaking news.
- Evaluating the results for accuracy In an experiment, the temperature of a solution is measured by a student to be 79 degrees, but the true value of the temperature is 85 degrees. What is the percent error in this measurement? (see the appendix). Relative error: Comment on the accuracy:patient is to be given an intitial dose of 23.4 mL of a medication and 1.2 mL/h thereafter for 8.5h. write an equation that relates the volume of medication administered as a function of timeA series of four measurements of the ratio of the circumference to diameter of a disk are made. The results of these measurements are: 3.140, 3.133, 3.132, 3.133. The average of the four measurements is the experimental value for Pi-Lab and the accepted value is Pi = 3.141. What is the percent error of these measurements? a) 1 % b) 2% c) 0.5% d)0.2%