For example: 10.1 +93.4 = 103.5, because both 10.1 and 93.4 are precise to the tenths place. Solve the following problems assuming all the numbers are measured. Report the correct number of significant figures. a. 87.3 +0.001 = b. 0.201 +0.92 = c. 320 +8.41 = d. 1200-60=

Q: Use the given standard enthalpies of formation to determine the heat of reaction of the following…

A: Dear student , since you have posted multiple parts questions we will allow to solve only first…

Q: ➡Al2O3 + Fe NaNO2 + O₂ NH3 1. FeO + Al 2. NaNO3 3. N₂ + H₂ 4. Al + Fe(NO3)2 5. SO2 + H₂O 6. Mg(OH)2…

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Q: 5. If 800-ug of arsenic-76 are present in an artifact, how much arsenic-76 will be present after…

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Q: Q3: Explain the reasons why the energy of an absorbed photon is not equal to the energy of the…

A: Fluroscene is a type of photolumiesence when a Molecule is excited by uv light or visible light.

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Q: Exploring the propitiates of gases experiment. Please show calculations. Volume (mL) Pressure (atm)…

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Q: What is the oxidation number of Na in Na2SO4 What is the oxidation number of H in CaH2 What is the…

A: Here we are required to find the oxidation number of each species

Q: .) (Refer to the image of table) Applying the Boyle's law, what happen to the final lume? Final…

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Q: What is the mechanism for the following reaction?

A: In this question, we will draw the reaction mechanism for the given transformation.  You can see the…

Q: What will be the character following salts are acidic, basic, or neutral at 25°C: (a) Cu(CH3COO)2;…

A: Given,  What will be the character following salts are acidic, basic, or neutral at 25°C: (a)…

Q: = 10.2. Suppose that a reaction A + 2B = 2Y + 2Z is believed to occur according to the mechanism A →…

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Q: Use the bond energy from the Data Sheet to calculate AH for burning of 1mole of heptane, C-His Show…

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Q: C. Using the standard reduction potentials, calculate the standard emf. H₂ + I2 2H + 21

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Q: How many stereocenters are present in the given structure (mark by star). Also determine the value…

A: If four different ligands are attached to a carbon, then it is called cenreocentre.  The number of…

Q: I. Predict whether the following processes are spontaneous as described, spontaneous in the reverse…

A: According to bartleby guidelines we're supposed to answer first three subparts of a multipart…

Q: Directions: Balance the following chemical equations: 1. SiCl4 + H2O → SiO2 + HCl 2. Au2S3 + H2 → Au…

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Q: Binary mixtures of equal moles of which of the following acid-base combinations will lead to a…

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Q: Explain in detail the formation of 2-methylbutanoic acid from 2-chlorobutane, using Grignard…

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Q: 9. What weight of pyrite ore (impure FeS2) must be taken for analysis so that the BaSO4 precipitate…

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Q: Please give IUPAC name for the structure below! 0 Hi CN N3 4 OCH₂CH3

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Q: What is the tR of peak A? What is the tR of peak B?

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Q: Consider a voltaic cell in which the following reaction takes place. 2Fe 2+ (aq) + H₂O2 (aq) + 2 H+…

A: Given-> [Fe2+] = 0.00813 M [H2O2] = 0.914 M [Fe3+] = 0.199 M [H+] = 1.32 × 10-3 M

Q: 10.4. A reaction of stoichiometry A+B=Y+Z is found to be second order in A and zero order in B.…

A: As we know,  the rate of reaction is determined by the slow step i.e slow step is Rate Determining…

Q: Consider the following titration curve for the titration of maleic acid with 0.10 M NaOH. How many…

A: Maleic acid HOOC-CH2=CH2-COOH is titrated with 0.10 M NaOH solution.We have to tell - The number…

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Q: write the basic equilibrium equation for NH3

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Q: You have carried out an experiment using the spectrophotometry concept. A solution containing…

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Q: Normality (N) of Na2S2O3 = 0.025 N Volume of the sample = 203 ml Volume (V) of Na2S2O3 = 0.97 ml…

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Q: What are the oxidation number of hydrogen in H₂O and H₂O₂ molecules respectively? A. + 1 B. -1 C. -1…

A: Oxygen has -2 charge.

Q: 17. Calculate the de Broglie wavelength of a proton (in nm) whose mass is 1.673 x 10-27 kg and is…

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Q: Calculate the pH of the resulting solution if 27.0 mL of 0.270 M HCl(aq) is added to 37.0 mL of…

A: we need to calculate the pH of the given solutions

Q: assuming complete dissociation what is the ph of a 3.04 mg/l ba(oh)2 solution

A: Given  Concentration of Ba(OH)2 solution in (mg/l) = 3.04 mg/L pH = ?

Q: Explain the difference between: a strong acid or base and a weak acid or base

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Q: 2(d) What effect will of each of the following changes have on the rate of the reaction of potassium…

A: As per the Bartleby guidelines, an expert ia allowed to answer one question at a time.  Please…

Q: Show the lewis structure of C2H2Cl2F2

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Q: GH ما او با TiCla CH2Cl2, -78 °C TiCl2 CHgCl2, -40 to 0 °C ОН OH Me Reaction 5 Reaction 6

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Q: 88 The illustration to the left represents a mixture of nitrogen (blue) and oxygen (red) molecules.…

A: we need to fill the boxes, using the given illustration and the balanced equation

Q: 14.108 lodine is oxidized by nitric acid according to the following skeletal equation: I2 (s) +…

A: Unbalanced equation I2 (s) + NO3-  (aq)→HIO3 (aq) + NO2 (g)

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Q: Calculate the wavelength in meters of light absorbed by an electron in an atom of hydrogen as it…

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Q: Determine the freezing point depression of a solution that contains 30.7 g glycerin (C3H8O3, molar…

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Q: What is the relative retention of the two solute?

A: relative retention of the two solute

Q: The element belonging to group 15, period 3 is named

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Q: A certain indicator, HA, has a K₂ value of 4.0 x 10-6. The protonated form of the indicator is red…

A: Given data :  Ka = 4.0×10-6 pKa = -log(Ka) = -log(4.0×10-6) = 5.40

Q: Calculate the energy released, in J, when 1.00 kg of uranium-235 undergoes the following fission…

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Q: B. Using the standard reduction potentials, calculate the standard emf. Cr + 2Cr³+ 3Cr²+

A: Standard EMF = 0.48 V

Q: Write the chemical formula of the following metal complex: diamminetetrachloridoplatinum(IV). Write…

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Q: A sample of gas is at 45.0 °C. At what temperature would the volume of this gas be the double of the…

A: Dear student , since you have posted multiple questions we will allow to solve only first question…

Q: What is the standard reduction potential of Mg2+ --> Mg if the standard reduction potential of Zn2+…

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Q: 6. Write balanced nuclear equations for the following nuclear reactions: a) Cd-159 decays by…

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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.