Can a set of data be accurate but not precise?

Q: Describe the difference between intensive and extensive properties. Which of the following…

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Q: One important observation that supporters of the phlogiston theory had trouble explaining was that…

A: Lavoisier, a French chemist, conducted an experiment in which he decomposed the mercury calx into…

Q: All of these are examples of physical properties except: A. Color Change B. Density C.…

A:

Q: Identify each physical property as extensive or intensive.a. melting point c. densityb. mass d.…

A: An intensive property is the physical properties that depend upon the amount of the matter. The…

Q: Is there more information in an individual scientific fact or ina theory? Explain.

A: Facts and theories are different from each other. Individual scientific fact are observations. It…

Q: Which of these changes are physical and which are chemical? ExplainA goldsmith melts a nugget of…

A: A change in which the chemical composition of the substance remains the same and no new substance is…

Q: 1.5 oz to grams

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Q: Identify each property as chemical or physical.a. The element mercury has a high density.b. Solid…

A: The given statements has to identified as whether physical or chemical property.

Q: How does a heterogeneous mixture differ from a homogeneous mixture? How are they similar?

A: Mixtures are the result of mixing together of two or more substances. Example: Mixture of salt and…

Q: Which of these changes are physical and which are chemical? Explain.(a) Plants make sugar from…

A: According to the question, sugar is made from water and carbon-dioxide. We have to mention as to…

Q: When astronomers observe distant galaxies, they can tell that most of them are moving away from one…

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Q: property? Extensive properties defin quantity. Intensive properties define unique characteristics…

A: 16-B 17-B 18-I

Q: Is it possible for measured data to be precise but inaccurate?

A: Here we have to explainIs it possible for measured data to be precise but inaccurate-

Q: 19. Which of the following substances would be classified as a mixture? a. Water b. Table Salt С.…

A: Applying definition of mixture.

Q: How does an element differ from a compound? How are they similar?

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Q: If a stufent dropped their copper on the floor,they could carefully pick it up and place it on the…

A: While weighing compounds using balances, it is very important to take care that all sources of error…

Q: What are the differences between physical and chemical change. Explain in 200 words.

A: Introduction: Physical change and chemical change are completely two different process. For example,…

Q: Density is an intensive property and volume is an extensive property. Is it true or false?

A: # We are given to find whether the density  and volume are extensive or intensive property. # we…

Q: 1.16 × 10¬8 s to nanoseconds Express your answer to three significant figures and include the…

A: Given, To convert 1.16 × 10-8 s to nanoseconds

Q: How would you distinguish mixtures from substances based on a set of properties? Give examples

A: Substance is that class of matter which is made of only one type of atom or molecule while as…

Q: Write a brief explanation about importance of measurements in chemistry.

A: Accurate, precise measurement is a fundamental component of good science. For this reason,…

Q: You observe that sugar dissolves more quickly in hot teathan in iced tea. You state that higher…

A: An unexplained situation for whom a solution is suggested that is not acceptable by a scientific…

Q: What Is Derived units?

A: A derived unit is a unit that results from a mathematical combination of SI base units.

Q: 1. Which is an example of a physical change? A) The rusting of an iron nail B) The burning of…

A: melting of an ice cube in a glass of soda is a physical change. So option e is correct answer. Here…

Q: The volume of a sample of oxygen gas changed from 10 mL to 11 mL as the temperature changed. Is this…

A: A chemical change is observed when there is a change in the chemical composition of elements.…

Q: Is the ink inside of a pen a pure substance or a mixture? Explain your answer using scientific…

A: a pure substance is made up of only one type of molecule. But mixture is made up of more then one…

Q: 3. Which of the following are pure substances and which are mixtures? a. table sugar b. distilled…

A: Pure substance is made up of only one type of particle. It is always homogeneous in nature.Mixture…

Q: What are some differences between physical and chemical properties or changes?

A: We have to describe the difference between the physical and chemical properties or say physical and…

Q: Which property of rubbing alcohol is a chemical property?a) density (0.786 g/cm3)b) flammabilityc)…

A: Physical property: It can be measured without any change in the identity of the given substance.…

Q: Density of Substances at Room Temperature Liquid Density (g/mL) ethanol 0.789 milk 1.033 oil EAS…

A: Given substances, Ethanol Milk Oil Water

Q: chemical tests were used to differentiate between the two substances in the mixture. Which of the…

A: Physical properties:These are the type of properties which are considered as ‘observables’ i.e.…

Q: Can a set of data be accurate but not precise? Please explain why

A: Precision can either be the number of decimal places to which you are sure, or the consistency of…

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: How would you classify the following material? coffee (black) a. solution b. an element c.…

A: A solution contains two or more substances of uniform particle size.  It is a homogeneous mixture.A…

Q: Which of the following is an example of a chemical property? A) density B) ductility C)…

A: A chemical property describes how a substance may participate in a chemical reaction.

Q: 3. Why did you classify the properties that you observed as physical, extensive, intensive, or…

A: Since you have posted multiple question, as per our company guidelines we are supposed to answer the…

Q: To determine the volume of a cube, a student measured one of the" dimensions of the cube several…

A: For 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: Which among the properties are measurable? Which ones are not?

A: Measurable properties are those properties that can be measured using scientific tools.

Q: 7. A student combines pure NaCl (sodium chloride) with pure DI water. The resulting is an example…

A: Given process,            Mixing of pure NaCl with pure DI water. a. homogeneous mixture          b.…

Q: Which is a more accurate volume-measuring instrument, a graduated pipet or a graduated cylinder?…

A: Liquid volume is usually measured using either a graduated cylinder or a buret. As the name implies,…

Q: 14) Oxygen (02) is classified as what type of matter? A) element B) homogeneous mixture C) compound…

A: Thankyou for submitting an excellent question. Since you have asked multiple question, we will solve…

Q: Which of these is NOT a physical property A density B flammability C hardness D luster E reactivity…

A: Physical properties can be observed or measured without the composition of that matter changing.

Q: How many grams F in 511.9 g Br2F6?    Put the answer in the box in regular (non-scientific)…

A: Given: Mass of Br2F6 is 511.9 g and we know that the molar mass of Br2F6 is 273.7984 g/mol

Q: B. Heterogeneous mixture D. Pure substance Ca²+? Q5 A combination of sand, salt, and water is an…

A: The sand,salt and water is an example of Heterogeneous mixture.

Q: Based on this result, is the woman's drink a pure substance or a mixture

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Q: Which of these changes are physical and which are chemical? Explain.(a) Plants make sugar from…

A: (a) Plants make sugar from carbon dioxide and water. It is an example of chemical change. As carbon…

Q: 1. Metal Ore a. element b.compound c. mixture   2.  Grinding dried leaves into a fine powder…

A: We have to classify metal ore and type of change occuring on grinding leaves.

Q: You have two solid substances that looks the same. What measurements would you take and which tests…

A: The two solid substances can be differentiated by observing their physical properties. Physical…

Q: Which one of the following is a unit of mass? A) μL B) Mg C) cd D) mm2 E) in.

A: Here we have to find which of the following is a unit of mass.  We know that mass is the combined…

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.