2.2 Rhenium (Re) occurs naturally in two distinct isotopes, 185 Re and 187 Re, with an average atomic mass of 186.207 amu. One of the isotopes (187 Re) constitute 62.60% of Re element and has the atomic mass of 186.956 amu. Using the information above, calculate the atomic mass of 185 Re isotope. a necessar

Q: One of the Freons, CCI₂F2, is manufactured from carbon tetrachloride and hydrogen fluoride. The…

A: Given,when CCl4 reacts with HF to form CCl2F2 and HCl.mass of CCl2F2 = 117 kgmass of CCl4 = 183…

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: Consider a mixture of 10 billion O2 molecules and 10 billion H2 molecules. In what way is this…

A: The 1st mixture contains 10 billion or 109 O2 molecules and H2 molecules. The 2nd mixture has 109…

Q: مان A₂B(g) +B(g) =A₂B₂ (g) 1 c = 16-4 2 Ag+ 2B (g) = A ₂ B₂ (g) kc = 28.2 Fc for the reactio 6 A (g)…

A: here we are required to find the equilibrium constant for the given reaction.

Q: Express your answers to at least 5 significant figures. The mass of one mole of boron is 10.811 g.…

A:

Q: What is the molecular (formula) mass (in AMU) of C 4H 80 2? Key Concept: The molecular mass is…

A: Answer is in next step

Q: 2 5 152 A 352.44 155 T 362.31 154 16 D 359.12 153 G 355.67 156 X 365.88 157 Z 369.52 You time travel…

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

Q: We experimented on various elements: Mossy Zinc, Aluminum Turnings, Copper Turnings, Activated…

A:

Q: 1

A: Moles of propane = ( molecules of Propane / avagadro number )  Moles of propane = ( 3.45 • 10^24 /…

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: 5. In a 3.7-gram sample, there are (A) 1.1 x 1022 atoms of gold (B) 3.2 x 1025 atoms of gold (C) 4.4…

A: Number of Mole-Ratio of given mass of substance to the molar mass of substance is called number of…

Q: Using the balanced equation from Question #8, how many grams of lead will be produced if 2.54 grams…

A: Given, 2PbS + 3O2 ---------->  2Pb + 2SO3 mass of PbS react = 2.54 g mass of O2 react = 1.88 g…

Q: The combustion of liquid propane (C3H8) yields gaseous carbon dioxide and water vapor.  If 2.33…

A:

Q: Law of Conservation of Mass Within a Chemical Equation 1 of 2 1. XY,(aq) + T(s) --> TX(s) + Y(s) 2.…

A: Since we only answer upto 3 sub-parts, we will answer the first 3 only. Please resubmit the question…

Q: What is the maximum mass in grams of magnesium oxide that can be produced by the reaction of 6.8g…

A:

Q: Solid potassium and oxygen gas react to produce solid potassium peroxide, K2O2. Assume the reaction…

A: 1) Write the balanced chemical equation for the given chemical reaction. 2) From the balanced…

Q: Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH₂(g) + H₂O(g) = CO…

A: The equilibrium constant of a chemical reaction gives a relationship between the reactants and the…

Q: 3 Pb(SO,)2 + 4 Fe → 3 Fe,(SO4)3 + 3 Pb REACTANTS PRODUCTS Element / Polyatomic lon How Many? Element…

A: Ans

Q: For the following reaction, 2.58 grams of methane (CH4) are allowed to react with 29.7 grams of…

A: Given a reaction :  Methane (CH4 ) + carbon tetrachloride → dicholromethane (CH2Cl2) We have to…

Q: Chemical Reaction Fofol + Hola! Balanced Chemical Reaction 3 F (c)(a) Chemical Equilibrium…

A:

Q: chemical formula

A:

Q: 1.The combustion of ammonia in the presence of excets oxygen yields NO, and H20: 4 NH3 (g) + 7 02…

A: 1) Given that : Mass of ammonia = 174 g Mass of oxygen consumed = ?

Q: Coal is a leading source of energy for the world. While coal is primarily composed of carbon and…

A: Given:S(s)+O2(g)→SO2(g)

Q: The elements nickel (Ni) and boron (B) form two binary compounds with the following compositions:…

A:

Q: Yzed 3.725 g of an unknown mixture of NaCl, SiO2, and CaCO3. You isolated 1.108 g NaCl, 0.848 g…

A: Given information- total mass of mixture = 3.725 g  mass of NaCl = 1.108 g  mass of SiO2   = 0.848 g…

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

Q: You take three compounds, each consisting of two elements (X, Y, and/or Z) and decompose them to…

A: The problem belongs to the simplest ratio of masses.

Q: There are two gas compounds that are made out of element  A and B. This is the mass percentage of…

A: Given: Mass percentage: Compound 1: 30.43% A, 69.57% B Compound 2: 63.64% A, 36.36% B

Q: For the reaction "P₄(s) + 6 Cl₂(g) → 4 PCl₃(l)", if 125 g of P₄ is reacted with 323 g of Cl₂, what…

A: Phosphorus reacts with chlorine to form phosphorus trichloride. The equation for the balanced…

Q: The combustion of liquid propane (C3H8) yields gaseous carbon dioxide and water vapor.  If 1.64…

A: Formula used : Number of mol = mass / molar mass

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54 426Fe (53.94 amu), 5626Fe…

A: It is given that Iron exists in nature as a mixture of predominantly three isotopes: 5426Fe (53.94…

Q: Consider these compounds: A. Ca3(PO4)2 В. Ваз (РОд)2 C. Cuco3 D. PbSo4 Complete the following…

A: A question based on solution that is to be accomplished.

Q: 2KCIO,(s) 2KCI(s) + 302g) If 17.8 g of potassium chlorate is heated and decomposes, find the mass of…

A:

Q: 8- Bromine (Br) has two isotopes, with masses of 78.92 and 80.92 amu. The natural abundance of the…

A: bromine has two isotopes which are Br-79 and Br-81. Given, the mass of Br-79 isotope = 78.92 amu the…

Q: Consider the following reaction N2 (g) + 3H2 (g) ? 2NH3 g If 1.10 x 10 g N2 is reacted with 500 x 10…

A: The given reaction is, N2 (g) + 3H2 (g) →2NH3 (g) Given that: mass of N2 = 1.10×103 g mass of H2 =…

Q: If 21.4 g of aluminum is reacted with 91.3 g of Fe2O3, the prodücts will be Al2O3 and iron. What…

A: Limiting reagent: In a chemical reaction, the reagent that totally consumed is known as a limiting…

Q: 10. Copper has two naturally occurring isotopes, 6Cu (isotopic mass = 62.9296 amu) and 6Cu (isotopic…

A: Atoms of the same element having same atomic number but different mass number are called as…

Q: Using the balanced equation from Question #8, how many grams of lead will be produced if 2.54 grams…

A:

Q: A student has been tasked to determine the percent water in thalium (III) nitrate, Tl(NO3)3 . xH2O.…

A: Thalium (III) Nitrate is a salt having the molecular formula Tl(NO3)3. In normal conditions, it…

Q: A sample of trifluoroacetic acid

A: Atomic mass of C = 12 amu Atomic mass of H = 1 amu Atomic mass of F = 19 amu Atomic mass of O = 16…

Q: 3. (a) Magnesium oxide was formed when the metal burns in air. (i) If 1.25 g of magnesium oxide…

A: Magnesium burns in the air to form magnesium oxide. The reaction occurs as follows: Mg (s) + O2( g)…

Q: Write the formulas of the elements that are reactants and the formulas of the compounds that are…

A: In a chemical reaction, reactants are present on left side of the arrow and products are present on…

Q: What is the mass of 7.10 moles of magnesium chloride, MgCl2? Express your answer with the…

A: 1) The compound given is MgCl2 with moles = 7.10 mol Since molar mass of MgCl2 = Atomic mass of Mg +…

Q: A classic SUV features a 194 L gas tank. Assuming a molecular formula of C8H18 for gasoline and…

A: Consider the balanced reaction for the complete combustion of gasoline to give CO2  and  H2O is as…

Q: The picture shows the structures of two compounds. The two compounds have similar chemical…

A: The organic compounds which contain -OH group and has the general formula CnH2n+1OH are regarded as…

Q: Consider the reaction between barium and sulfur: Ba(s) + S(s) BaS(s) Both barium and sulfur also…

A:

Q: butane (C4H10) is combusted in the presence of oxygen.  carbon dioxide and water are produced. if…

A: Given - Weight of butane =150g Weight of carbon dioxide=?

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.