Suppose a student measured the mass of a sample that has a known mass of 40.5809 g using an analytical balance. The mass they observed was unstable, constantly jumping between 39.5 and 41.5. Choose all of the following reasons that could cause this error.

Q: Give the balanced chemical equation for each of the following reactions. Identification of nickel i...

A: The balanced ionic equation for this reaction:       

Q: 5. A 300.0 mg sample containing Na¿CO3, NaHCO, and NaOH and inert material either alone or in some c...

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Q: H,0 H, Heat

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Q: For which of the following pairs of elements would electron transfer between atoms most likely occur...

A: When the electrons are transferred from the outermost shell of metal to the outermost shell of non-m...

Q: The half-life of Oxygen-15 is 2 min. What fraction of a sample of O-15 will remain after 5 half liv...

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Q: Calculate the percent by mass of potassium nitrate in a solution made from 67.0 g KN0, and 447 mL of...

A: Given: Mass of KNO3 = 67 g The volume of water = 447 mL The density of water = 0.997 g/mL Standard...

Q: For the reaction below which of the statements is correct? A+ 2B 3C The reaction is third-order over...

A: Answer: Order of reaction depends upon the molecularity of rate determining step. 

Q: uestion 14 A functional group capable of having characteristic electronic transitions. These chemica...

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Q: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days? a ...

A: The half-life of iron-59, t1/2 = 44.5 days Time elapsed, T = 222.5 days Initial mass of the sample, ...

Q: write the balanced nuclear equation of 1. the loss of a positron by Yttrium 2. the alpha emission re...

A: Yttrium is denoted as Y Protactinium is denoted as Pa

Q: H3C-C-0-Ĉ-CH3 A FeBr3 + Br2 B (Para Product only) AICI3

A: We have given the organic reaction and we have to find the major product of the reaction.   

Q: Greenhouse gases absorb (and trap) outgoing infrared radiation (heat) from Earth and contribute to g...

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Q: Properties of Intermolecular forces (IMF)

A: 1. Ion–Dipole Forces Ion–dipole forces are the electrostatic attractions between an ion and a dipole...

Q: On analysis, an equilibrium mixture for the reaction 2H2S(g) 2Hg) +Sg) was found to contain 1.0 mol ...

A: Given Data :  1. Mol of H2S = 1.0 mol  2. Mol of H2 = 4.0 mol.  3. Volume = 4.0 L  4. Kc = 3.4 . Che...

Q: Which of the following is NOT use as material of holding samples in IR spectrometry? quartz KBr NaCI...

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Q: Do a web search and find anything that has a chemistry spin to the human body. Then post a link to t...

A: The appropriate answer to the question is given below

Q: A functional group capable of having characteristic electronic transitions. These chemical groups sc...

A: The correct option is:  

Q: Consider the compounds CH₃OCH₃, CH₃CH₂OH, CH₃CH₂CH₃. Arrange the following compounds from lowest to ...

A: Given compounds are :  CH₃OCH₃, CH₃CH₂OH, CH₃CH₂CH₃

Q: Br or I Br (b) or I Br (c) or

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Q: Which of the following molecules can have dipole-dipole interactions as their strongest intermolecul...

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Q: a Br e OCH3

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Q: The osmotic pressure of a 14.538 mM solution of LiCl is 343.095 mm Hg at 27.84 °C. How many ions per...

A: Given:  Osmotic pressure = 343.095 mm Hg  Concentration (C) = 14.538 mM  Temperature = 27.84°C   

Q: A functional group capable of having characteristic electronic transitions. These chemical groups sc...

A: Every functional group having characteristic electronic transitions called signal. Azo group absorbs...

Q: (c) An ideal monoatomic gas at 1 bar and 300 K is expanded adiabatically against a constant pressure...

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Q: It takes a minute and a half for the concentration of oxygen to decrease from 4.2 x102 M to 2.4 x103...

A: Initial concentration of oxygen gas = 4.2 x 10-2 M Final concentration of oxygen gas = 2.4 x 10-3 M ...

Q: Which compound has the greatest ionic character? O RbF O LiF O NaF O CSF

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly repos...

Q: In general, to calculate the rate constant for a first order decomposition reaction, A products, giv...

A: The correct answer is given below

Q: Which of the following compound has the central atom with +1 formal charge? O PCI6 O XEF3* O IF5 O A...

A:

Q: Given these molecular weights of only nonpolar and non-ionic molecules consisting of on hydrogen and...

A: Alkanes have General formula Cn H2n+2  (where n is an integer greater than or equal to 1).

Q: 60 L tank containing 2.5 mol of CH4 . Initially, when Poutside was 1 atm, there was no leakage. But ...

A: Given: Volume of tank = 60 L Initial moles of CH4 = 2.5 mol. Initial pressure of CH4 = 1.0 atm. And ...

Q: Give the major product for the following reaction

A:

Q: The rate of a reaction was experimentally determined to double if the concentration of reactant A is...

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Q: 7.00 mL of 6.00 x 103 M Fe(NO3)3 (6.00 times 10 to the minus 3rd power MFe (NO3)3) is added to 4.00 ...

A: Given: Concentration of Fe(NO3)3 taken = 6.00 × 10-3 M Volume of Fe(NO3)3 solution taken = 7.00 mL  ...

Q: CH3 CH3 CH3 H3C-Ċ-CI CH3 ČH3 + HC1 AICI3

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Q: Arrange the following in order of increasing normal boiling point. Vapor Pressure Versus Temperature...

A: Normal boiling point is defined as the temperature at which liquid boils (1 atm pressure). Normal bo...

Q: Which of the following (NBr3, BF3, OF2, IF3) is(are) exempted from the octet rule? Check all that ap...

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Q: 24. What is the meniscus? What is its significance to volumetric measurement? How does the metric sy...

A: Meniscus = Meniscus is the curve on the top of the liquid present in a container. The curve is produ...

Q: For the following reaction, which of the changes listed below would cause more reactants to form whe...

A: A multiple choice question based on equilibrium concept that is to be accomplished.

Q: The molecular formula of Aspirin is C9H;O4. How many Aspirin molecules are there in a table that con...

A: Given that:  Mass of aspirin = 200mg = 200mg×1g/1000mg = 0.2g Molar mass of C9H8O4 = [9(12.01)+8(1.0...

Q: Give the major organic product(s) for the following reaction:

A:

Q: The molar mass of Fluorine (F) is 19.0 g/mol. Calculate the molar mass of F2. O 6.31 x 10-23 g/mol O...

A: Given: The molar mass of fluorine = 19.0 g/mol

Q: Nitroethylene, H,C-CHNO, is a sensitive compound that must be prepared with great care. Atempted pur...

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Q: The reaction of 60.0 g of aluminum oxide with 30.0 g of carbon produced 22.5 g of aluminum. What is ...

A:  

Q: It takes a minute and a half for the concentration of oxygen to decrease from 4.2 x10 2 M to 2.4 x10...

A: Given: The initial concentration of oxygen is 4.2 x 10-2 M The final concentration of oxygen is 2.4 ...

Q: Complete the following nuclear equation and identify X in each case

A: Nuclear reaction involves the formation of one or more nuclides by bombarding the nucleus with diffe...

Q: Vanadium(V) oxide reacts with calcium according to the chemical equation below. When 20.0 moles of V...

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Q: CH OCH, Determine whether the substrate underwent: a reduction reaction, an oxidation reaction, or n...

A: Reduction : Oxidation number decreases Oxidation : Oxidation number increases

Q: The elements of sodium and fluorine are far apart from each other on the period table. It is therefo...

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Q: Determine the rate law for the reaction: 2 NO(g) + 2 H2(g) → N2(g) + 2 H20(g) Using the method of in...

A: Determination of rate law for an reaction

Q: What change in pH will occur when 0.050 mmol of HOAC (Ka= 1.78 x 10³ ) is added to 100.0 mL of a buf...

A: Given: Concentration of HOAc in buffer = 0.1000 M Concentration of NaOAc in buffer = 0.1000 M Volume...

Analytical Tools

Analytical tools or analysis tools help one to get into a conclusion or results from the data collected. Analytical tools can be applied for simple data sets and also in the case of big data analytics.