In a chemical reaction, do the elements involved change into different elements as the reaction proceeds? Multiple Choice only the light elements only the heavy elements all elements change no elements change

Q: Purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all of the…

A: Given:  Purple atom = Iodine (I) White atom = Hydrogen (H)

Q: A mixture contains both potassium phosphate and potassium chloride. What is the percentage of…

A: The moles of  Cu3(PO4)2 in 0.5565 g is, number of moles=given massmolar mass…

Q: How many atoms of silver are in a bracelet that weighs 34.0 g? O 1.1 x 1023 O 1.1 x 106 O 1.9 x 1023…

A: We have to calculate the number of atoms.

Q: How many phosphorus atoms are contained in 158 kg of phosphorus? 3.07 x 1027 phosphorus atoms 2.95 x…

A: To determine the number of phosphorus atoms in 158 kg of phosphorus, we need to use Avogadro's…

Q: When heated, NaOH decomposes according to the following equation. If all of the water is produced as…

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Q: 3) Show your calculations clearly. Suppose you are provided with a 36.55 g sample of potassium…

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Q: What is the mass of 24.1 mol of xenon? 131 g 3.16 x 103 g 24.1 g 145 g

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Q: You are given an unknown mixture containing NaCl and NaHCO3. When you carry out the heating exactly…

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Q: Consider that the combustion of an unknown amount of a hydrocarbon produces 0.2 moles of H2O.…

A: Given , 0.2 moles of H2O was formed

Q: Based on the law of conservation of mass, how many grams of hydrogen gas, x, are formed by the…

A: Given, 66.0 g zinc + 72.9 g hydrochloric acid produces 136.3 g zinc chloride+ x g hydrogen gas. We…

Q: * Question Completion Status: Barium oxide was synthesized form the reaction of barium and oxygen in…

A: Barium reacts with oxygen to form barium oxide. The equation for the balanced chemical reaction is…

Q: 2. If you want to produce 85 g of silicon, how many grams of magnesium will you need? How many grams…

A: The chemical reaction that takes place between sand and magnesium metal to produce elemental silicon…

Q: If you react 5.2 grams of magnesium metals with 2.3 grams of copper (II) bromide, how many total…

A: Given : Mass of magnesium i.e Mg taken = 5.2 g And mass of copper (II) bromide i.e CuBr2 taken = 2.3…

Q: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: How many silver atoms are contained in 1.75 moles of silver?

A: 1 mole of a substance is equal to the Avogadro number of atoms.  1 mole =6.022 x 1023 atoms.

Q: An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown…

A: Given:X = 10.0 gSampleMass of E1Mass of E2112.2 g13.8 g212.5 g14.4 g36.1 g6.9 g411.7 g13.3 gFind out…

Q: expected mass loss

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Q: Given the following reaction, what mass of hydrogen gas will be produced by the reaction of 1.16 mol…

A: The above problem is based on the concept of limiting reagent.

Q: Determining whether the formation of an ionic compound is endothermic or exothermic reaction…

A: The reaction taking place is given as, => Ba (s) + Cl2 (g) -------> BaCl2

Q: If atoms of the metal magnesium were to react with molecules of the nonmetal fluorine, F2 , how many…

A: Concept: In a reaction of metals with non-metals, there is transfere of electrons take place from…

Q: A student has a sample of zinc that weighs 22.19 g How many zinc atoms are in this

A: Given :- mass of Zn = 22.19 g  To be calculated :- number of Zn  atoms  molar mass of Zn = 65.38…

Q: When the following equation is balanced correctly, what is the coefficient in front of Ba(NO3)2?…

A: Steps on how to use the trial and error method to balance the chemical equations:Write the…

Q: Some of the formulas could be either molecular or empirical formulas; however, some can only be…

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Q: How many milligrams of a 18-mg sample of calcium-47 remain after 45 days? Express your answer using…

A: The decay of a radioactive substance can be modeled by the equation:where:N(t) is the quantity of…

Q: 100.0 g lead(II) nitrate is reacted with 50.00 g potassium iodide (in plenty of water). How many…

A: Given,Mass of PbNO32 = 100 g.Mass of KI = 50 g.Mass of PbI2 = ?We know,• No.of moles = Given…

Q: After a 664 g iron bar stands in moist air for a month, exactly one–eighth of the iron turns to rust…

A: Initial mass of iron bar = 664 g One-eighth of iron turns into rust . It is given that one-eighth of…

Q: If 23.5 grams of silver nitrate are added to 16.0 grams of sulfuric acid, how many grams of silver…

A: Given: 23.5 grams of silver nitrate is added to 16.0 grams of sulfuric acid. To find: grams of…

Q: True or False 1.An atom is oxidized when it loses a neutron 2.Burning a molecule of glucose…

A: Given statement are : 1.An atom is oxidized when it loses a neutron 2.Burning a molecule of glucose…

Q: What is the total number of oxygen atoms on the right-hand side of this chemical equation? 3HNO2 aq…

A: We need to count all the atoms on left side of the reactions as well as right side of reactions to…

Q: What is the amount, in moles, of each of the following substances? A)12.6 g Ar B)3.50 g Zn C)26.5…

A: Welcome to bartleby !

Q: When a log completely burns in a campfire, the mass of the ash is much less than the mass of the…

A: The law of conservation of mass states that matter cannot be created or destroyed in a chemical…

Q: An analytical chemist measures the amount of Elements E₁ and E₂ in four samples of an unknown…

A: Since the unknown substance, X contains elements E1 and E2, it can be either a compound of E1 and…

Q: Identify the scientific law that is used in the process of balancing chemical equations. the law of…

A: 1. Given that : We have to identify the scientific law that is used in the process of balancing…

Q: Balance the equation below, which uses imaginary elements (they still follow the usual convention –…

A: We have to balance the equation below, which uses imaginary elements (they still follow the usual…

Q: 2. Determine the number of protons contained in particle of protons having a mass of 5.019 x 10*…

A: Interpretation-  To determine the number of proton contained in the particle of proton having mass…

Q: who received the Nobel Prize in Chemistry in 1912 ?

A: Nobel prize is one of the highest rank award given in the fields of chemistry, physics, literature,…

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.