3 p*

Q: There are four sketches below. The first sketch shows a sample of Substance X. The three sketches…

A: A question based on physical and chemical changes. A molecular system is given whose most possible…

Q: Calculate the number of nitrogen atoms in a 120.0 g sample of dinitrogen tetroxide (N,04). Be sure…

A: Mass of nitrogen dioxide (N2O4) = 120.0 g  Number of nitrogen atoms = ?

Q: In the table below, there are descriptions of an experiment on samples of three different chemical…

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Q: = 2. 2 2 e f "b EC E. 1 dy Identify the major product that you would expect from the following…

A: Product of following reaction can be made by applying appropriate reaction mechanism.

Q: What is the name of the element that is in group 3A and period 6? What is the name of the element…

A:

Q: sodium and nitrogen Express your answers as ions and chemical formula separated by a commas

A:

Q: What are the chemical symbols for antimony, arsenic, aluminum, boron, gallium, germanium, indium,…

A:

Q: Name each of the following elements : As, I, Xe, He, C, Si

A: Name of the given element- As = Arsenic I= Iodine Xe= Xenon

Q: Write the symbol for one atom of zinc, magnesium, iron, and copper

A: Symbol for one atom of zinc is - Zn Symbol for one atom of magnesium is - Mg

Q: Two or more substances in variable proportions, where the composition is constant throughout are a…

A: A compound is a chemical species that is formed when two or more atoms join together chemically,…

Q: How many of the following elements are metals? Ca Al Sn S As Bi

A: The properties of metals are--- Metals are solid in room temperature (except mercury), they are…

Q: Provide the atomic symbol for each of the following elements: (a) calcium, (b) carbon, (c) hydrogen,…

A: Atomic symbol of an element is an abbreviation which is used to represent it and generally consists…

Q: Sodium carbonate is used in the manufacture of paper. What is the chemical formula for this…

A: Chemical formula of a compound is formed by the cross - valency rule. The valencies of both the…

Q: Rubidium has two naturally occurring isotopes, Rb-85 (mass 84.912 amu) and Rb-87 (mass 86.909 amu).…

A:

Q: Express your answer as a chemical symbol or as an ion.

A:

Q: Calculate the number of phosphorus atoms in a 130.0 g sample of diphosphorus pentoxide (P,05). Be…

A: Diphosphorus pentoxide (P2O5) is an oxide of phosphorous that has 2 atoms of phosphorous and 5 atoms…

Q: Which of the following elements is a metal?   phosphorus nitrogen strontium fluorine argon

A: To find: The element that is metal

Q: d) Which of the following substances can be considered chemically pure? • Brass ● ● Seawater Air…

A: Given 5 substances • Brass , • Seawater ,  • Air , • Apple juice  ,    • A bar of 24-karat gold We…

Q: Consider Molecule X, which is found in all living cells. This single-strand nucleic acid folds into…

A: The name of x is RNA (Ribonucleic acid) Explanation given below with attached file.Explanation:

Q: There are four sketches below. The first sketch shows a sample of Substance X. The three sketches…

A: Given changes it undergoes Type of Change = Need to determine

Q: (1. On the second floor of Kent Laboratory a chemistry student in 111B finds that 15.20 g of…

A: Given information:Mass of nitrogen = 15.20 gMass of oxygen for different compounds = 17.37 g, 34.74…

Q: 1s²2s 2p*3s' Express your answer as a chemical symbol.

A: Part A Excited electronic configuration is 1s2 2s2 2p4 3s1 1 electron from 2p transferred into 3s…

Q: 3 e 3 p* 4.

A: According to the question, the ion is having 3 electrons, 3 protons and 4 neutrons.  We need to…

Q: Express your answer as a chemical symbol or an ion.

A: Atoms consists of subatomic particles i.e. protons, electrons and neutrons

Q: Which of the following is a chemical property? O Changing shape O Melting point O Oxidizing O…

A: A multiple choice question about chemical property.

Q: element? Element Name Period Group # Family Туре Na Fe Br Xe Ca

A:

Q: Calculate the mass of forsterite Mg2SiO4 that contains a billion (1.0*10^9) oxygen atoms. Be sure…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Calculate the number of oxygen atoms in a 120.0 g sample of dinitrogen tetroxide (N,O4). Be sure…

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

Q: Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ration and a…

A: Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ration and a…

Q: Bromine (atomic mass 79.904 amu) consists of 2 different naturally occurring isotopes, Br-79 (atomic…

A: .Bromine consist of two isotopes 79Br and 81Br.     79Br⇒78.9193 amu.     81Br⇒80.9163 amu…

Q: Mg2+ p3- NO3

A: Since you have posted a  question with sub-parts , we are entitled to answer the first three…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.