A piece of metal was weighed on a laboratory balance five times and gave the following values: 15.75, 15.73, 15.77, 15.76and 15.74 grams.Determine the average mass andstandard deviation from the mean mass.

Q: A student uses a balance with a stated uncertainty of #0.002 g to weigh a quantity of a reagent by…

A: Empty beaker weight = 40.301 g Beaker + Reagent weight = 40.689 g

Q: Calculating the density of a rectangular wooden block (fig 3). In determining the density of a…

A: Density of the substance is equal to the ratio of mass to volume. Formula: Formula of wooden block:

Q: Four research teams measured the speed at which signals travel down a certain type of nerve fiber,…

A: Given 85.0 m/s

Q: 15. In preparing a certain ointment, a pharmacist used 28.35 grams of zinc oxide instead of the 31.1…

A: Given, mass of zinc oxide (used) = 28.35 g mass of zinc oxide (required) = 31.1 g

Q: 1) Perform the indicated mathematical operations. State the uncertainty of the final answer a…

A: Uncertainty is the measure of mathematical value which is deviated very little from measured value.

Q: Round each of the following numbers to four significantfigures and express the result in standard…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 20 Express the answer to this multi-step calcu- lation using the appropriate number of sig- nificant…

A:

Q: Which of the following represents the precision of a set of measurements?   A student used water…

A: Given: mean = 2.763 g/mL standard deviation = 0.026 g/mL

Q: Which of the following is incorrect: a. General steps in quantitative analysis include: Method…

A: A multiple choice question based on chemical analysis, which is to be accomplished.

Q: The following statements are correct regarding errors except Random errors are indeterminate but…

A: Systematic errors is a type of error , which does not arise by chance and is introduced due to…

Q: Please help me this question! Thank you! "What is the measuring range and accuracy (i.e. how many…

A: Micropipettes are precision instruments that are designed to transfer volumes in the microliter…

Q: Using your knowledge of metric units, English units, and theinformation on the back inside cover,…

A: a) mm to nm    1 mm= 1mm x10-3m1 mmx 1 nm10-9m    1 mm = 106 nmb) 1 mg= 11000000kg            =…

Q: Perform the following set of operations and choose the alternative that expresses the result to the…

A: • The given expression is,        (1.5 × 10-4 * 61.3 ) + 2.01     • We need to write the result of…

Q: Suggest two sources of systematic error and two sources of random error in measuring the width of a…

A: Error in a measurement is observed when the true measurement value differs from the measured value.…

Q: Express the molecular mass and its standard uncertainty of C17H21NO4 with the correct number of…

A: Answer:- Molecular mass = 17 × mass of carbon atom + 21 × mass of hydrogen + 1 × mass of nitrogen +…

Q: Use the References to access important values if needed for this question. The following linear plot…

A: y = ac b/x on lny = lna + b/x on lny = b , 1/x + lna y = mx + c

Q: In the UV assay of paracetamol you are required to weigh tablet powder “…containing 0.150 g of…

A: Answer : 1 tablet should contain  500 mg of paracetamol so  20 tablet contains  = 500*20 = 10000 mg…

Q: Q3WThe density of a waste water was 84 lbm/ft' in a waste treatment pond of 5000 cm long and 1500 cm…

A: Given data :  Density = 84 lbm/ft3 = 84 *  0.45359 * (3.2808)3 = 1345.49 kg/m3 Long = 5000 cm = 50 m…

Q: If the concentration of mercury in the water of a polluted lake is 0.200  μg (micrograms) per liter…

A: area = 15.5  square miles = 4 × 107 m2 depth = 27 feet = 8.2 m Concentration = 0.200 micro g//L

Q: One common bathtub is 13.44 dm long, 5.920 dm wide, and 2.54 dm deep. Assume that the tub is…

A: Given: The length, breadth and height of a rectangular bathtub is 13.44 dm, 5.920 dm and 2.54 dm,…

Q: Is the use of significant figures in each of the following statementsappropriate? (a) The 2005…

A: Hey since you have posted a question with multiple sub-parts, we will solve first three sub-parts…

Q: During a titration experiment, 50.00 mL of a certain solution needs to be transferred to an…

A: We use the same pipette five times.

Q: 3) For the results, discuss the significance of the following in terms of accuracy or precision: a)…

A:

Q: A standard sample of pooled human blood serum contains 42.0 g of albumin per liter.Laboratory X…

A: Precision is the reproducibility of measurements where accuracy is the closeness of measured value…

Q: Systematic error causes the mean of a data set to differ from the accepted value. True…

A: The objective of measurement can be qualitative or quantitative. Every measurement has an inherent…

Q: If the specific gravity of a liquid mercury is 13.6, calculate the mass in pounds of 2500  mL of…

A: Given : Specific gravity of mercury = 13.6  And volume of liquid = 2500 mL

Q: The density of an irregular shaped object was measured three times with the following results: 2.15…

A: Standard deviation: The dispersion of a group measured values from the average value can be known by…

Q: 3. A student weighed an unknown mass directly on an electronic balance of intermediate sensitivity,…

A: Weight of beaker + unknown = 59.121 gWeight of beaker = 30.346 gWeight of unknown = (59.121-30.346)…

Q: If the average American throws away 4.5 lb of trash each day, and the population of the US is…

A: Since, 1)Calculate the trash produced by 311 million people in one day. 2) Calculate the trash…

Q: In a certain population, body weights are normally distributed with a mean of 152 pounds and a…

A: To find people must be surveyed if we want to estimate the percentage:

Q: A group of students took turns using a laboratory balanceto weigh the water contained in a beaker.…

A: A group of students took turns using a laboratory balance to weigh the water contained in a beaker.…

Q: What is the difference between a qualitative and quantitative measurement?

A: The difference between a qualitative and quantitative measurement it to be explained. Qualitative…

Q: An example of a semiconductor is ZnS with a particle diameter of 1.8 nanometers. Convert this value…

A: Applying basics relationship between nm to dm and nm to inches.

Q: llowing calculations. Round each result so that it contains only significant digits. The mbers in…

A: Solution -

Q: The standard solution is prepared by dissolving a known mass of zinc pellets with conc. HCl. The…

A: Given information, Volume (V) = 250 mL = 0.25 L Mass of Zn (m) = 0.9809 g Molecular weight of the…

Q: The sun is 1.496 x 1011 meters from the earth.  If light travels at 3.0 x 108 m/sec, how many…

A: Given, Distance of earth from sun = 1.496 × 1011 m Speed of light = 3.0 x 108 m/sec

Q: student weighed 10 pennies on a balance and recorded the following masses: 3.112 g, 3.109 g,…

A: Outliers are data reports that stand out from the rest in at least one way.

Q: The distance from the Earth to the moon is 239,000 miles. The distance from the Earth to the moon is…

A:

Q: The measurements were recorded and then repeated six times for two different methods, each giving:…

A: Given: The sample mean, sample standard derivation ,and sample size 1st method are χ1¯ =42 , s1 =0.3…

Q: over a course of multiple trials a student measures the density of methanol to be 0.707 g/mL, 0.799…

A: Average density is the mean of all the densities i.e. ( sum of all three densities / 3 )  .…

Q: Explain why materials with very low density exhibit a greater degree of uncertainty in mass when…

A:

Q: A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is hiswavelength at this speed…

A: Velocity of the springer is,

Q: 1. A piece of metal was weighed on a laboratory balance five times and gave the following values:…

A: Those digits which has meaning in the given magnitude is known as significant figures. All non-zero…

Q: Also we have a mixture for gas is hydrogen helium neon and nitrogen sealed in a container of -50…

A: From kinetic theory of gases, the root-mean-square velocity of a gas is given by the formula:vRMS =…

Q: level of uncertainty

A: LEVEL OF UNCERTAINITY

Q: In determining the density of a rectangular wooden block, use the information in the table below and…

A: Concept introduction: Density of the substance is equal to the ratio of mass to volume. Formula:…

Q: c. The relative deviation (d,) of a measurement or experimental data is the deviation divided by the…

A: Given that, xi=17.34%,17.33%,17.28%,17.29%,17.36%  Calculate relative deviation of 17.29%Cu(in ppt)…

Q: The pharmacist weight 800 mg of a substance on a balance of dubious accuracy. When checked on a…

A: Percent error is defined as the ratio of absolute value (modulus) difference of true value and…

Q: A 795-centigram sample of borax was placed in a certain volume of water at 25 °C. After adding the…

A:

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.