A student performed an analysis of a sample for its calcium content andgot the following results:                              14.92%             14.91%              14.88%        14.91%The actual amount of calcium in the .sample is 15.70%. What conclusions can you draw about the accuracy and precision of these results?

Q: State the rules governing the use of significant figures in Adding/subtracting measurements.  How…

A: Significant figures are the digits having a meaning in a given number. The number of decimal places…

Q: A sheet of aluminum (density=2.60 g/cm³) has dimensions of 4.75 mm x 1.80 m x 2.48 ft. Calculate its…

A:

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

A:

Q: density of irregular solid mass of irregular solid 9.039 g initial volume 68 mL final volume 74…

A: Given , Mass of irregular solid = 9.039 g Initial volume = 68 mL Final volume = 74 mL Total volume…

Q: Question attached

A: Accuracy It deals with how the data matches with the true data. Closer the data is to an accepted…

Q: what is chemistry? why is it reliable, flexible and testable?

A: Chemistry is a branch of science, which deals with systematic study of structure, composition and…

Q: The weight of a metal sphere was measured to be 5.99 g. Unfortunately, the caliper that was supposed…

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

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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: A physical property is; A) The ability of a sample to undergo change B) A property the sample…

A: We need to give a definition of a physical property based on the fact of change of composition.

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

A: Statement a is correct as it includes general steps in quantitative analysis.  Statement b is…

Q: You want to determine the density of a compound but have only a tiny crystal, and it would be…

A: Given, volume of CHCl3 = 5.50 mL            density of CHCl3 = 1.492 g/mL            volume of CHBr3…

Q: zinc and copper are used in the measurement of food. Are there other topics possible

A: A question based on measurement that is to be accomplished.

Q: On the molecular level, what does it mean for a solid sample to be pure?

A: Applying concept of pure solid / substance via molecular basis explanation.

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: Given that : Mass of original sample = 2.5429 g Mass of filter paper = 0.5662 g Mass of paper cup =…

Q: If matter is uniform throughout and cannot be separated into other substances by physical means, it…

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Q: For which of the following, can the composition vary? Select one: a. pure substance b. both…

A: The following, can the composition vary :

Q: In order to find the density of a solution of unknown density, 10 mL of solution was drawn into a…

A: Density = mass / volume.

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

A: Statement a is correct because it include correct general steps in quantitative analysis.

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: A block of wood weighs 64.02 g and has the following dimensions: length of 15.0 cm, width of 11.0…

A: Given: Mass of wood = 64.02 g. And dimensions of wood = 15.0 cm × 11.0 cm × 5.50 cm.

Q: A 25.00 grams sample of a metal is placed carefully in a graduated cylinder, and then benzene is…

A: Given : mass of metal = 25.00 g Mass of metal + benzene = 60.85 g Volume of metal + benzene = 50.00…

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

A: Chemical analysis are of two types : 1. Quantitative analysis 2. Qualitative analysis

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: What would be the difference in precision and accuracy if I chose to use a graduated cylinder…

A: Solution Beakers, chemist flasks, dropping funnels and therefore the like aren't volumetrical…

Q: Suppose that instead of using the cylindrical rod of Example 1-2 to prepare a 1.000 kg mass we were…

A: Given:Mass = 1.000 Kg = 1000.00 gDensity = 8.96 g/cm3

Q: 1.17 A solid white substance A is heated strongly in the absence ofair. It decomposes to form a new…

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Q: You are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to…

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Q: G. An irregularly-shaped sample of aluminum (- put on a balance and found to have a mass of 43 9.…

A: Volume of copper = Difference in the water levels…

Q: A student performed an experiment of recording the length of a pencil and got the following results…

A: Accuracy:→From this we get that how close a correct value from the measurement.→The accuracy is not…

Q: How can you distinguish an element, from a compound, from a solution, from a heterogeneous mixture?…

A: If in a mixture of different compounds there are presence of two or more different phases then the…

Q: Given the following set of data for the determination of density of solid material: Mass of empty…

A: Given: Mass of empty beaker = 37.54 g Mass of empty beaker + solid = 48.36 g Mass of solid=…

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: c) A metal sample has a mass of 7.56 g. The sample is placed into a graduated cylinder previously…

A: Given :  Mass of metal=7.56 g Initial volume=20.00 mL The final volume of water= 21.68 mL Volume of…

Q: In a lab investigation, a student is asked to crush and measure 1g of sulfur from a larger solid…

A: The Intesive properties are not  affected by sample size

Q: 2) As an example of precision and accuracy of data, suppose the % carbon in a single compound has…

A: Accuracy means the value comes close to  actual true value and Precision means all the trial values…

Q: Suppose you were measuring out an organic liquid, and some of it is evaporated after you have…

A: The density of the substance is calculated by the relation shown below. Density=massVolume

Q: Substance A Substance B O element O element compound O compound Substance C Substance D O element O…

A: Elements are the purest form which have some solid defects like Schottky Defects · Frenkel Defect ,…

Q: "Systematic errors typically affect accuracy whilst random errors generally affect precision”. Do…

A: Accuracy means if we are performing any experiment and if we get a true value(expected value) than…

Q: 4. Consider the tabulated data collected by a student for an unknown metal sample. Use this data to…

A: Significant figures are those important digits which measures the accuracy of calculation.

Q: When large pieces of a purple-black crystalline solid are gently heated, a purple vapor is formed…

A: Solution : Change is defined as the process that shows the change in state, shape, color, shape,…

Q: Suppose the metallic paper clips (which contain iron) had been replaced by magnesium or nickel.…

A: Ferromagnetism It is a property of substance in which metals act as a permanent magnets. Also it…

Q: Question attached

A: Theory or Law, though both sounds similar, they are never synonymous. Theory: Suppose, take ‘Bing…

Q: An aluminum foil weighs 0.500 g and measures 10.00 cm by 10.00 cm. Given the density of aluminum is…

A: The volume of the aluminum foil can be calculated as given below.

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

A: Statement a is correct as general steps is quantitative analysis includes all given steps.

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.