The same or similar results in successive measurements is a feature of which measure? a Accuracy b. Precision c Voriability d None of the above

Q: Explain why measurements are never exact.

A: The act of the measuring the size of an object is known as measurement. It is numerical…

Q: write UNITS OF MEASUREMENT

A: The SI system, also called the metric system, which is used around the world.

Q: Rewrite this measurement with a simpler unit, if possible. kg m"-kg 2.9 kg"-m Note: If you can…

A: Given:

Q: II 8TIIL! US ng TaUie 2.9 UI page II II your tCxID0OK, IUchtIly tne 3U03UICC. USIlng 245a l,20 7Lx…

A: Methyl mercury levels higher than 3.00×10-4 mg/dL are toxic to central nervous system. Whether the…

Q: A flask containing 11.7 mL of a liquid weighs 132.8 g with the liquid in the flask and 124.1 g when…

A: Density = mass of liquid (gm) / volume of liquid.(ml)   ….(1) Volume of liquid = 11.7 ml     …….(2)…

Q: The agreement between the tested values is known as O A. Precision OB. Certainty OC. Significant…

A: The correct ans is option (E) Accuracy.

Q: 21. Write the conversion factor that converts a measurement ininches to feet. How does the…

A: As the length measures in feet and inches. The conversion used to convert inches to feet is as…

Q: Significant figures are the indication of what? Why? Give an example too. (Please explain it shortly…

A: Significant Figures⇒Significant figures express or indicatesthe precision of a measureingtool used…

Q: Look up the measurement of the approximate thickness of a human hair.a. Convert the measurement to…

A: (a)

Q: 42.8 grams of zinc shot is added to 15.8 ml of water in a graduated cylinder. the water level rises…

A:

Q: Significant figures are the indication of what? Why? (Please explain it shortly and easy to…

A: Accuracy measures the closeness between the calculated and observed value. Precision measures how…

Q: The density of mercury is 13.35 g/cm3. Experimental results gave the following data: 10 4.5 g/cm3…

A: Given : Actual density = 13.35 g / Cm3 Measured values of density = 10 4.5 g/cm316.65 g/cm315.75…

Q: A systematic error (A can be discovered and corrected. (B Cannot be corrected nor detected arises…

A: The correct option is:

Q: Round off or add zeros to calculate answers to give a final answer with three significant figure…

A: The rules for significant figures are: 1)  Zeros between two non-zero digits ARE significant. 2) All…

Q: Use the prefix multipliers to express each measurement withoutany exponents.a. 1.2 * 10-9m b. 22 *…

A: Given measurements    Measurements  part(a) 1.2×10-9 m part(b) 22×10-15 s part(c) 1.5×109 g…

Q: Calculate to the correct number of significant figures. (24.6681 x 2.38) + 332.58

A: Rules for performing addition and subtraction: Addition or subtraction is performed in a general…

Q: A systematic error A arises from the limitations on the ability to make a physical measurement. B is…

A: To define: Systematic error.

Q: How do I determine which value is the most precise and which value is the most accurate when given 4…

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…

Q: Enter all measured data, and certain final answers to the correct number of significant figures as…

A: In this question, the values of the following are given with the correct number of significant…

Q: Use prefix multipliers to express each measurement withoutany exponents.a. 38.8 * 105g b. 55.2 *…

A: The given values are in grams, second, meters, and liters respectively which are converted without…

Q: Measured values are written to the correct number of significant figures O to match the significant…

A: We will answer the above question by using basic concepts of chemistry.

Q: e ruler is in centimeters (cm). Record the length of the rod below taking into count any uncertainty…

A: Centimeter is unit of measuring length. Meter, decimeter and millimeter are other units of length.

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Distance is measured in different units such as meters (m) , centimeters (cm) , millimetres (mm) ,…

Q: What is the general term for any device that records a measurement? A) an instrument B) an…

A: An instrument is a mechanical apparatus or implement, particularly utilized for accuracy work.

Q: Rewrite this measurement with a simpler unit, if possible. g* mL·g 1.3 2 g*-mL•mL•s Note: If you can…

A: We have to simplify given measurement by striking off the like terms

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Aim :- We have two missing parts the resultant number and the conversion factor that is used. We…

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A:

Q: Rewrite this measurement with a simpler unit, if possible. kg m 8.0 S'S Note: If you can simplify…

A: Answer: In this question, first of all we have to write the units in concise form and then have to…

Q: Distinguish between the terms accuracy and precision.In general, explain why a precise measurement…

A: To find: Difference between the terms accuracy and precision. Explanation for why a precise…

Q: Rewrite this measurement with a simpler unit, if possible. g cm 6.5 3. cm Note: If you can simplify…

A:

Q: Rewrite this measurement with a simpleru kg-L´-kg 4.6 2 kg´-L·s

A:

Q: Measurements are said to be precise. Explain why?

A: The precision of a measurement is defined as the degree of closeness of the multiple set of readings…

Q: The density of a substance relative to the density of water.  It is one of the few measured values…

A: The density of any substance is mass by volume. Density=massvolume The unit of mass is Kg and the…

Q: The are the markings on an instrument that represent the highest accuracy that the instrument can…

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…

Q: 1.) Why is there a need to convert one unit of measurement to another?

A: "Since you have asked multiple questions, we will solve the first question for you (as per our…

Q: When scientific measurements are made they are reported using: Select one: a. all certain digits…

A: Scientific measurements are done to get the accurate result . Hence when the report it , it is done…

Q: Why is it incorrect to say a measurement is accurate but not precise

A:

Q: When a measuring scale is used properly to the limit of precision, the least significant digit…

A: Note - There is a word error in your question, i.e., least should be replaced by last. Taking it…

Q: What are the apparatus used to measure objects? What are they measuring (ex. Ruler measures the…

A: There are many apparatus used for measuring objects like for measuring length of an object,…

Q: Explain why it is important to use significant figures in a measurement. Give an example of…

A: Significant figures are used in measurements and calculations.

Q: An insulin syringe, a low volume syringe, commonly used for diabetic medication is intended for…

A: 1st question  Correct Option : False An insulin syringe is made for one time use. It is not advised…

Q: When a measuring scale is properly to the limit of precision, the last significant digit recorded…

A: There is no a perfect machine.However,for very precise equipment,the margin is a very small number.…

Q: 15 | he individual markings of a0-milliliter graduated cylinder are a of a apart. This allows one to…

A: A graduated cylinder is a standard instrument used to measure the volume of reagents in…

Q: What value of a measurement must be available if the accuracy of a measurement is to be determined

A: The physical dimensions of a substance are calculated by observing and taking down the measurements.…

Q: Which device would give the most precise measurement? Measurements in Images. A) B)

A: To identify: The scale which is more precise.

Q: What is the best description of precision as applied to a set of measurements or data? Select one:…

A: In measurement of a set, accuracy is closeness of the measurements to a specific value, while…

Q: The agreement between the tested values is known as O A. Precision B. Certainty OC. Significant…

A: Given: Agreement between the tested values.  To find: what is this agreement between the tested…

Q: Decide whether each proposed multiplication or division of measurements is possible. If it is…

A:

Q: A flask containing 11.7mL of a liquid weighs 132.8g with the liquid in the flask and 124.1g when…

A: The ratio between mass and volume or mass per unit volume is considered as density. The formula for…

Q: Given

A:

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.