Which of the following changes are chemical changes? Gasoline is burned. Gasoline is evaporated. Water is heated up. Water is boiled. Water is frozen.

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: For the image attached Draw a graph of the average mass vs. year. Make sure axes are labeled.

A: In the given table, the average mass and year are indicated very clearly and we only need to draw…

Q: Describe an atom with an atomic number of 3.  Include the correct number of protons in the nucleus…

A: Introduction to Lithium - Atomic number 3 and the chemical symbol Li identify the element lithium.…

Q: The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 1.5 mg/kg of body mass.…

A: The recommended adult dose of Elixophyllin is = 1.5 mg/kg of body mass Body mass of the person is =…

Q: What is ionization

A: ->Ionization is process by which electrically neutral atoms or molecules are converted to…

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: Problem #3 o A given quantity of gas at a pressure of 750mmHg and a temperature of -25° C occupies…

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Q: e) OH OH LDA

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Q: lo to become chemically stable rons does this have?

A: 6 is the atomic number and 12 is the mass number as according to the magic number the ist shell will…

Q: Solubility of Alcohols in Water Effect of carbon chain length Question:  From the results shown,…

A: In the data given ethanol, propanol, butanol and pentanol are given along with the number of drops…

Q: Draw four ketones with the following formula: C6H12O

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

A: Since, Isomers are those whose molecular formula is same but arrangement of atom is different. Thus,

Q: A total of 537 cal of heat is added to 5.00 g of ice at -20.0 °C. What is the final temperature of…

A: Given data :  Mass of ice = 5.00 g  Initital temperature of ice = -20.0°C Total heat added = 537 cal…

Q: V. Complete the following neutralization reactions. Indicate the acid, base, and salt. Balance the…

A: Since, Neutralization reaction are those in which acid react with base to form salt and water. Thus,

Q: F How many valence electrons does this have? 9 19

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Q: Consider the following reaction: 4 HBr(g) + O2(g) 2 H2O(g) + 2 Br2(g) (a) The rate law for…

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Q: Consider the following reactions and their associated equilibrium constants: A + 2B → C C D+E For…

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Q: If the concentration of mercury in the water of a polluted lake is 0.200  μg (micrograms) per liter…

A: area = 15.5  square miles = 4 × 107 m2 depth = 27 feet = 8.2 m Concentration = 0.200 micro g//L

Q: A solution consists of 60.3 g of potassium bromide, KBr, and 120.7 g water. (a) Calculate the weight…

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Q: Copper is regulated in drinking water to protect public health. The relevant reaction is below. The…

A: Using given pH value, we will calculate the H+ concentration and then OH- concentration. Then we…

Q: The degree of Hydrogen ion concentration is determined by the pH value. This value ranges from 0-14.…

A: The pH range 0-14 is divided into three categories :  1.) pH < 7 is for acids.  2.) pH = 7 is for…

Q: Now let's return to Tiffany's twins in the hospital. Each of the twins weighed 6lbs. The dosage of…

A: Given:- Each twin weight= 6 lbs                  dosage of erythromycin= 10mg/kg…

Q: NAME THE FOLLOWING COMPOUNDS. H₂O CO

A: We have to name the given molecules H2O and CO

Q: What particle correctly balances the following nuclear equation? 98 Mo + → ⁹⁹ Mo 42 42 O4He On ºe Op

A: Here a nuclear equation is given, we have to balance this equation.  Recall the given equation…

Q: the When following the steps to name an alkane, how do you know which end of parent chain to start…

A: Follow the rule of lowest Locant rule. Means the substituents have less number by starting numbering…

Q: A cylindrical container's pressure is 200,000 Pa; its temperature is 86 deg Fahrenheit; and its…

A: Ideal gas equation will be used to solve the given problem which is written as PV = nRT. It is given…

Q: 3) Using bond line structures, provide three constitutional isomers of alcohols for the following…

A: compounds having the same molecular formulas with different connectivities of atom known as…

Q: Which statement about the three fundamental particles is false? O a. The charge of a proton is equal…

A: Electrons, protons and neutrons are considered as fundamental partials of atom

Q: A cylindrical container's pressure is 200,000 Pa; its temperature is 86 deg Fahrenheit; and its…

A: Given=>  *Pressure (P)=200000 Pa                  Temperature (T)=86°F =>As we know…

Q: f) 9) h) HO j) OH H₂SO4 HO 140 °C .OH HBr H2O 0 °C H₂SO4 80 °C OH H+ OH Br. HBr HO 30 °C عمر H₂SO4…

A: These are the examples of Nucleophilic substitution, Elimination and esterification reactions

Q: The first excited electronic energy level of the helium atom is 3.13 ✕ 10−18 J above the ground…

A: According to the question we have, The electronic energy of the first excited state of the Helium…

Q: Suppose a chemical engineer studying a new catalyst for the Claus reaction finds that 211. liters…

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Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

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Q: A copper wire (D=8.96g/cm³) has a diameter of 0.25mm. If a sample of this copper wire has a mass of…

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Q: a. Give the normal state (solid, liquid or gas) of each of the following i. Isopropyl alcohol ii.…

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Q: A steel ball-bearing with a circumference of 26.1 mm weighs 200 mg. What is the density of the steel…

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Q: The Ksp of zinc hydroxide, Zn(OH)2, is 3.00 × 10-¹7. Calculate the molar solubility, s, of this…

A: In this question, we will determine the solubility of this given salt.  Given : Ksp value of Zn(OH)2…

Q: How many alkyl substituents are attached to the parent chain?

A: Alkyl substituents are also known as the side chains.

Q: An aqueous solution of sodium hydroxide is standardized by titration with a 0.102 M solution of…

A: Sodium hydroxide reacts with hydrochloric acid, to form sodium chloride and water. The equation for…

Q: Data: Year # of 1998 60 2000 2003 50 Pennies/volume of Pennies, mill Ave. Volmi Ave. density Final:…

A: Here is your answer........ The Graphs were plotted in Excel.

Q: A 0.500 g metal occupies a volume of 25.0cm³. What is its density? a. 0.020 g/cm³ b. 12.5 g/cm³ c.…

A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first 3 multiple…

Q: What is the Ksp of the salt at 25 °C? AB3(s) A³+ (aq) + 3 B¯(aq) Ksp =

A: Moles of salt = 0.0290 mol Volume = 1 L Molarity of salt = 0.0290 M

Q: An oxygen containing compound shows strong Infrared radiation absorption at 1630 - 1780 cm^-1 and…

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Q: Describe how to prepare 500 mL of a 1M solution of both NaOH and Ca(OH)2.

A: Molarity required = 1M Volume required = 500 mL Molarity: number of moles of solute per litre…

Q: A certain liquid has a density of 0.87 g/mL. 1.25 L of this liquid would have a mass of kg=1000 g)…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Use the References to access important values if needed for this question. Given the standard…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: Which of the following gives a buffer solution when equal volumes of the two solutions are mixed?…

A: A buffer solution consists of two solutions. They are - a weak acid and the salt of its conjugate…

Q: I. Identify the functional group present and name the organic compound given 1) 2) CI (C=C1…

A: A functional group is an atom or group of atoms other than the main hydrocarbon chain that is…

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

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Q: Write a brief account on the difference between nematic and smectic phases.

A: Explain diffence between nematic and smectic phases.

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.