An experiment is performed to determine if pennies are made of pure copper. The mass of 11 pennies was measured on a balance and found to be 26.748 g. The volume was found by dropping the 11 pennies into a graduated cylinder initially containing 10.00 mL of water. The volume after the pennies were added was 12.90 mL.

Q: How many moles of He are 221,000 He atoms?

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: What of these are correct conversions for kg to mg? Select all that apply. 1 mg = 10³ kg 1 mg = 1000…

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Q: Differentiate the metals and nonmetals based on their: Intramolecular Bond, Intermolecular Bond, and…

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Q: • Assuming that a 1.5g gas occupying a volume of 500ml at a pressure of 175 atm and a temperature of…

A: Mass of gas = 1.5 g  Volume of gas (V) = 500 mL = 0.5 L  Pressure of gas ( P)= 175 atm  Temperature…

Q: 2. Give the major product of the following reactions: Br 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. Br =-CN OH…

A: #2.1: The reactants are trans-1,4-butadiene which is a diene and 1,2-dibromoethene which is a…

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Q: Convert the following into SI base units (meters, grams, liters). For example: given 1.45 mm (=…

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Q: Question 8: Which one of the compounds in Figure 8 is not a structural isomer of the carboxylic…

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Q: Get the concentration of the unknown solutions with a %T of 63 Given: S1 = 0.02 mg 76%T S2 = 0.04…

A: Given: S1 = 0.02 mg 76%T S2 = 0.04 mg 58%T S3 = 0.06 mg 45%T

Q: An athlete runs the mile in 3 minutes, 56.6 seconds. At the same speed, how many seconds does it…

A: Given - Time to run a mile = 3 minutes 56.6 seconds.              1 mile = 1609.3 meter…

Q: compounds: 1. Hydrobromic acid 2. Hydrofluoric acid

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Q: Write the conjugate acid of CH3CH3O-

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Q: What is the hybridization of the Catom in the following molecule? CICCI sp Р O sp² sp3

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A: Here given:- =>Volume of water=1.89×104 litres=18900 litre     Volume of water=18900000 ml…

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Q: 2. (J. A) .h). Show how to achieve the following transformations. ??? ??? OH

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Q: When the transport of the 0,05moldm' KCI aqueous solution was measured at 25°C using the interfacial…

A: Given that, at 25oC temperature The concentration of the KCl solution is c =  0.05 mol/dm3 = 0.00005…

Q: CH₂ CH₂ | | CH3 CH3 CH3 I CH₂ CH₂ CH3 What is the relationship of these two structures? They are…

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Q: QUESTION 15 How many atoms of sulfur are in 499 g of Na₂S₂O3 ? Atomic weights: Na=22.99, S-32.07,…

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Q: What is the molarity of a NAOH solution if 17.08 mL are needed to neutralize 31.95 mL of 0.2121…

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Q: Draw a Lewis structure for each of the following species: ▶ Part A Part B co Draw the molecule by…

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Q: |DX| Pressure (not to scale) Temperature (not to scale) a. identify the states present at points a,…

A: INTRODUCTION: The P–T phase diagram of a sample of which is shown in the diagram displays stability…

Q: A second-order reaction has a rate constant of 0.008500/(M · s) at 30°C. At 40°C, the rate constant…

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Q: Ph N mechanism - + MON NO₂ Liorane softes men и и Ph NO₂ } TN- NON Ph и и HNW- N=N

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

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Q: 25.0000s

A: Pls explain your problem and then kindly again share to us . Here is nothing more than one word .

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Q: 0.390 J/gºC = 4.184 J/gºC nswer to the correct num

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Q: Suppose a chemical engineer studying a new catalyst for the Haber reaction finds that 914. liters…

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Q: true or false: A balanced chemical reaction is necessary to relate the rate of reaction to the…

A: Here the statement is given that a balanced chemical reaction is necessary to relate the rate of…

Q: 6. A vapor volume of 1.17 L forms when a sample of liquid acetonitrile, CH3CN absorbs 1.00 kJ of…

A: Volume (V) = 1.17 L Boiling point= 81.6°C = 81.6 + 273 = 354.6 K Pressure (P) = 1.0 atm

Q: c. Describe what happens when water was added to the dry substances: d. Is there a chemical…

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Q: At a certain temperature this reaction follows second-order kinetics with a rate constant of 0.047M…

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Q: Which compound is a tertiary alcohol? CH3 I H₂CH₂C-00 ON 01 Oll I O III OV CH3 IV II OH HO LOH

A: Out of the given molecules, we have to select the structure that represents a tertiary alcohol

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Q: Give the 4 sets of quantum numbers for the 16 electrons of Sulfur.

A: The atomic number of sulfur is 16.

Q: Which compound would have the lowest boiling point? о I IV OH II OH V ОН III -ОН

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Q: 2. Give the major product of the following reactions: OH CN I-CH3 HO + Oxyacid

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Q: What is the mass, in grams, of 28.74 mLmL of acetone? Express your answer using four significant…

A: Here, we have to find the mass of acetone (in grams) of 28.74 mL of acetone.

Q: Which of the following compounds is soluble in water? a. Cs2O b. CaS c. Hg2Cl2 d. NiO e. Al2S3

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Q: H3C (c) O-H Acid (a) Using the information from the table in Model 3, the pKa of CH3CO₂H = 16 (d)…

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Q: Determine the number of significant figures. 1. 3.4 / 0.025356 + 236.00 - 76.357  2. 5.6786 +…

A: Significant figures are the figures that are necessary to indicate quantity of something.

Q: What are the differences between endocrine and exocrine glands?

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Q: What is the relationship of these two structures? They are friends. They are not related. They are…

A: To check the relationship between these structures we would write their IUPAC names.

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Q: When Taylor was on a diet, they were losing 1.92kg per week. Taylor lost a total of 9.53lb. How many…

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Q: 6. What items other than a pen are you required to bring to lab next week?

A: We have to write what items other than a pen are you required to bring to lab?

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.