I. Identifying Physical and Chemical change in matter. Directions: Tell whether the following situation is Physical or Chemical change. Check the appropriate box for your answers. * Physical change Chemical change A tire is inflated Silver necklaces tarnishes in an acidic person A bicycle changes color as it rusts A piece of wood is cut in half Two chemicals were mixed together and a gas is produced Making an artificial volcano by combining baking soda and vinegar A sheet of paper is cut into pieces A marshmallow is toasted over a campfire Chocolate syrup is added

Q: much KClO3reactant

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Q: hydrocyanic acid (HCN) nitrous acid (HNO2) Ka=4.9×10−10 Ka=4.6×10−4 Use the information in the…

A: Given,  Acid dissociation constant of HCN = Ka = 4.9 x 10-10  Acid dissociation constant of HNO2 =…

Q: What pressure is exerted by 0.75 moles of a gas at 25°C in a container with a volume of 1.5 L?

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Q: 2.) An analyte solution was prepared using 1.1278 g of a diprotic acid and 25.0 mL of distilled…

A: Here we are required to find the Molarity of undiluted analyte and molecular weight of diprotic acid…

Q: # 3 O no correct response 30. 210 83Bİ→4,He +2063TI + Complete the nuclear equation above. O alpha…

A: Alpha particle - - > It has two protons and two neutrons which are bound to form a particle which…

Q: give full and condensed electron configurations, partial orbital diagrams showing valence electrons…

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: Determine the molar heat of combustion for C2 H5 OH) C2 H5 OH) + 3 O2(g) – 2 CO2(g) + 3 H2O((g)…

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Q: Calculate the frequency in megahertz of the neutral hydrogen forbidden line that has an exact…

A: Given -> Wavelength = 21.12 cm = 21.12 × 10-2 m(1 m=100 cm)

Q: Which of the following is NOT a factor to consider when choosing a site for nuclear waste disposal?…

A: Nuclear wastes are very harmful for human beings, wildlife moreover the environment. Thus we need…

Q: Question 9 of 23 Submit Determine the equilibrium constant for a reaction at 200 K if AG° =28.6…

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Q: Consider the given chemical equation: Pb3O4+x HCIy PbCl2 + Cl2 + z X, y and z respectively are

A: The given chemical equation is  Pb3O4 + x HCl →y PbCl2 + Cl2 +z O2 The values of x, y, z are ------?

Q: HyC HCI CHy HCI HyC CH CH, HCI HyC CH, CH CH,

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Q: OH viii. ii. Br +En 6. X. 7. ix.

A: Alcohol is converted into alkyl-bromide with HBr  Dehydrohalogentation with bulkier base like…

Q: Consider the reaction below: 2 SO3(g) =2 SO2(g) + O2(g) The Kp is 1.81 x 10-5 at 350.0°C. Calculate…

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Q: The enthalpy of solution for ammonium perchlorate NH4 CIO, is +33.47 kJ/mol. How many grams of…

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Q: Why should the selected rule(s) be followed? Weighing wet items will cause the displayed mass to be…

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Q: A solution is formed by dissolving 15.5 g of aluminum chloride with 50.0 g water at 25.0 oC.  What…

A: Given,  Mass of solute, AlCl3 = 15.5 g  Mass of water in g = 50.0 g  Temperature = 25.0 oC  What is…

Q: Which law of thermodynamics best explains why dissolving ammonium nitrate in water is spontaneous…

A: The first law of thermodynamics describes that the energy of the universe remains constant and it…

Q: added to colon indicat or it changes When acid purple to it changes From Purpie to the indicator.…

A: The given indicator has blue color acidic, HIn, and red color basic In-. The reaction when base is…

Q: give full and condensed electron configurations, partial orbital diagrams showing valence electrons…

A: Inner electrons of an element is the total number of electron of it's nearest previous noble gas…

Q: Part 1B: pH of Acetic Acid Solutions (Note: HAc = HC2H3O2, acetic acid). 1.0 M HC2H3O2 0.10 M…

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Q: The half-life of 1311 is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay…

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Q: 25. Which determines the speed of a molecule? * a. Its kinetic energy b. The amount of the molecules…

A: Multiple choice questions : 25-28

Q: Calculate the ratio of the effusion rates of N2 gas and 02 gas.

A: N2 , O2 Molar mass of N2 = 28.02 g/mole Molar mass of O2 = 32 g/mole

Q: 15-10. Suppose that the Ag | AgCl outer electrode in Figure 15-7 is filled with 0.1 M NaCl instead…

A: Given: Ag/AgCl outer electrode is filled with 0.1 M NaCl instead of saturated KCl. Calibration of…

Q: Which of the following substances would likely have the highest boiling point? lodine (12) Fluorine…

A: Boiling point is the temperature at which vapour pressure is equal to the atmospheric pressure.

Q: 3. Predict the product/s of the following reactions. Label the product as ortho, meta, or para. A.…

A: 3. A  When toluene is treated with Chlorine gas in presence of aluminium chloride , then para Chloro…

Q: A. Put the following complexes in decreasing order of reactions rates under a dissociation reaction:…

A: Monodentate ligands bind to other molecule through only one donor atom and bidentate ligands bind to…

Q: QUESTION 8: Metals react with oxygen gas to form metal oxide. For example, magnesium reacts as…

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Q: Select Weak Acid as the analyte in the titration interactive. Analyte, 25.0 ml. Weak Acid, 1.0...…

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Q: What is the activity coefficient for each ion at the given ionic strength at 25 °C? Activity…

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Q: Which of the following (assuming the same concentration in water) would make a solution with the…

A: Strong acid: Strong acids completely dissociate into their ions in water. Let HA is strong acid then…

Q: An unsaturated cyclic hydrocarbon, A, undergoes a reaction with Br2 in CC14 to yield product…

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Q: Activity 3. Magnetic Properties Instructions: Using the electronic Configuration, which of the…

A: Concept:  Paramagnetic and diamagnetic: In electronic configuration of elements, Whenever two…

Q: Which of the following ions are always present in an acidic solution?   a. hydronium ions   b.…

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Q: Using data from Appendix 4, calculate AG for the reaction NO(g) + 0,(g) =NO,(g) + 0,(g) for these…

A: Given data :  1. T = 298 K  2. PNO = 1.00 x10-6atm  3 .Po2 = = 2.00 x 10-6 atm  4. PNO2 = 1.00 x…

Q: Of the bonds below, which is the least polar. C-O N-O C-F S-O K-Br

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Q: 11. During heat conduction in solids * a. the energy of the particles expands. b. the particles…

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Q: Write out the short form electron configuration for selenium.

A: Atomic number of selenium is 34 which means selenium has total 34 electrons

Q: Do it all please ASAP

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Q: Water is an amphoteric compound. True False

A: Water is amphoteric in Nature because it acts as acid as well as base

Q: It takes 242. kJ/mol to break a chlorine-chlorine single bond. Calculate the maximum wavelength of…

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Q: ZnCO3 (MW = 125.4 g/mol) has solubility of 1 mg/L  of pure water at a certain T. Calculate the Ksp…

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Q: Calculate an approximate heat of combustion for ethane (C2H6) in kilojoules per mole by using the…

A: Combustion equation of ethane can be written as- 2C2H6 + 7O2 ----> 4CO2  + 6H2O

Q: What mass of potassium nitrate is needed to generate 163.0  L of gas, composed of 111.0  L of N2 and…

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Q: A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a…

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Q: The IUPAC name is: HO a) l,4-trimethylcyclohexano) b) I,4,4 - trimethyl cyclohexanol C)…

A: Given structures are The IUPAC names of the compounds are -----?

Q: Decide if each statement is true or false for the rxn. 1) The major product is a mixture of…

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Q: A 1.00 L solution contains propanoic acid (C3 Hs O2 H) with a concentration of 0.210 mol/L, and…

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Q: What is the activity coefficient for each ion at the given ionic strength at 25 °C? Activity…

A: According to Debye - Huckel limiting law, the activity coefficient is expressed by the formula .…

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.