Significant digits give information about (select all that apply) a. The results of an experiment. b. The accuracy of data from an experiment. c. The digits that are known to be accurate.

Q: # 65 of 214 A2 equivalence 25.00 mL of a solution containing 0.1333 M ammonia (K = 1.76 x 10-5) is…

A: Concept based on buffer solutions.

Q: 1. Knowing that one day is 24 hours and one hour is 60 minutes, how many minutes are in 2.0 days?

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: Which of the following two molecules is more stable?

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Q: 1.complete the reaction CH₂OH C-OH

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Q: 3. Propose a reaction scheme to synthesize the following compound using only 1-pentene and…

A: Let us discuss a step by step mechanism to form the required product.

Q: Compound A, I would like to ask about the 180° turn in upper C -CH₂CH₂. -OH and -H rotate 90°…

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Q: The first atomic explosion was detonated in the desert north of Alamogordo, New Mexico, on July 16,…

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Q: Calculate the freezing point and boiling point of an antifreeze solution that is 48.6% by mass…

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Q: Calculate the binding energy per nucleon (in J) for Be and "Be. The atomic masses are 7.016930 u for…

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Q: Name each compound according to the IUPAC system: 1. CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3…

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Q: QUESTION 2 What is the balanced net ionic equation for the following reaction: Kl(aq) + F2(g) 12(3)+…

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Q: The spacing between two adjacent lines in the pure rotational spectrum of a diatomic molecule is…

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Q: WRITE THE STRUCTURAL FORMULA OF THE FOLLOWING: (NOT SKELETAL FORMULA)   6. 2-METHYL OCTADECANE…

A: From the given iupac name now we have to draw the structural framework of the following compounds as…

Q: In class, we learned why chromium (Cr) has a 4s13d5 electronic configuration instead of 4s2 3d4. By…

A: Electronic configuration is defined as arrangement of electrons in shell, subshell and orbitals.

Q: The mass of a single strontium atom is 1.46x10-22 grams. How many strontium atoms would there be in…

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Q: 2. What is the role of buffer in: a. pH b. buffering capacity c. pka and Henderson and Hasselbach…

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

Q: Select the compound with the higher boiling point. HF or HCL

A: Boiling point: The temperature at which the vapor pressure of a liquid becomes equal to the…

Q: Knowledge Check Which H is most acidic? Highlight this H. 4-Ö: :S Question Which site is most basic?…

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Q: 1. The antibacterial activity of flavonoids was tested against the bacterial strain, Escherichia…

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

Q: Which type of radioactive decay has the net effect of changing a neutron into a proton? (Select all…

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Q: Choose the correct molecularity and rate law for each of the elementary reactions shown below. (a)…

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Q: Which of the following aqueous solutions would have the highest boiling point? 1.0 m NaNO, 1.0 m…

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Q: In the specific heat equation the delta T symbol (∆T) stand for?

A: The specific heat capacity equation is used to find the heat change in a material due to a change in…

Q: S U- B- S

A: SUBSTANCE A matter with certain qualities and makeup is referred to as a substance. Every pure…

Q: When 30 g KCl and 30 g of CaCl2 added to 50 dL of DI water, find the molar concentration of Cl-.and…

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Q: 3. A student ran the following reaction in the laboratory at 657 K 2 NH3 (g) ( N₂ (g) + 3 H₂(g) When…

A: In the given reaction ammonia decompose into nitrogen and hydrogen. The balanced chemical reaction…

Q: a: Sketch within a cubic unit cell the following crystallographic directions: [121], [201], [2 1 3),…

A: The crystallographic direction within a cubic unit call can draw by converting the Miller indices…

Q: bioassay tests.

A: The question uploaded by you is multiple questions. According to the guidelines, if there are…

Q: turnover number of an enzyme related to Vmax cal mechanics

A: This is multiple questions. As per the guidelines, we are allowed to solve the first question if we…

Q: CH3-CH2 I CH3-CH-CH-CH2-CH-CH2-CH2-CH2-CH2-CH3 CH3-CH2 I CH3-CH2 I I I CH3 CH3-CH-CH2-CH-CH2-CH2-CH3…

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Q: 8. Propanoic acid (CH₂CH₂COOH, which we simplify to HPr) is a carboxylic acid whose salts are used…

A: Molarity of propanoic acid solution is 0.10M  Acid dissociation constant Ka is 1.3 * 10-5  We have…

Q: this is wrong

A: Given that, 37.4% ethylene glycol (C2H6O2) solution by mass. The density of the solution is d = 1.05…

Q: A solution is prepared by dissolving 27.7 g of urea [(NH₂)₂CO], in 147.0 g of water. Calculate the…

A: Boiling point is the temperature at which substance start converting from liquid to vapour form

Q: A urine sample has a mass of 145 g and a density of 1.010 g/mL. What is the volume of this sample?

A: Given,  The mass of urine sample = 145 g.  The density of the sample = 1.010 g/mL. The volume of…

Q: is mercury(1) ion (or mercurous ton). It is the only diatomic metallic cation you need to know. A.…

A: A salt is soluble when the energy produced during the interaction of the ions with solvent molecules…

Q: it is possibly incorrect

A: Answer: This question is based on Raoult's law. According to Raoult's law when a non-volatile,…

Q: 1- The value of the chemical displacement of the axial proton in cyclohexane is less than the…

A: The chemical shift for axial and equitorial protons in cyclohexane system is different.

Q: Calculate .076 X 41 , answer with the correct number of significant figures

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Q: A mixture consisting only of lithium chloride, LiCl, lithium carbonate, Li2CO3, and lithium nitrate,…

A: Introduction to Elemental Analysis In the process of elemental analysis, a sample of a substance…

Q: 14.3476 +2.67 Express your answer in appropriate significant figures. 953.2140.7329 Express your…

A: Significant figures: The number of digits that are used to express the quantity. Appropriate…

Q: O methyl O ethyl O propyl butyl

A: Stereochemistry is branch of chemistry in which we deal with three dimensional arrangement of atoms…

Q: 5. Find x if x² (0.0010-x) 1.8 x 10-4

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Q: 1. (a) Balance the following simple redox reaction. Fe (s) + O₂(g) + 2H₂O (1)→ Fe³+ + 4 OH (b) If…

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Q: the Electron Name: nucleus Date: What is an atom? Everything in the universe is made up of ATOMS…

A: We are to write the missing words from the paragraph about the structure of atoms.

Q: Chemistry Read the Hydrogen nuclear magnetic resonance spectrum ,considering that it is from the…

A: 1H-NMR spectrum gives an information regarding the complete structure of the unknown compound. From…

Q: Calculate the enthalpy change for the following reaction, __C₂H4(9) + F₂(g) → _CF4(9) + HF(g) using…

A: Recall the given reaction,                   _ C2H4 g  +  _ F2 g  →  _ CF4 g  +  _ HF g∆Hf° C2H4 =…

Q: A rock contains 0.697 mg of 206pb for every 1.000 mg of 238 U present. Assuming that no lead was…

A: Given,  Mass of 206Pb = 0.697 mg  Mass of 238U = [A]0 = 1.000 mg  Half life period for 238U = t1/2 =…

Q: d) 87 °F = 304 K First convert 87 °F to 31°C, then convert 31 °C to 304 K

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Q: how many grams of each to prepare 30ml and what are the percentages of each chemicals.

A: As per question, to prepare 1000 mL of Iodine tincture, Mass of Iodine required = 20 g Mass of…

Q: 1) Calculate the volume of the concentrated sulfuric acid required. 2) What precautions are required…

A: Above equation is necessary for calculate the volume of concentrat H2SO4

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.