b. 7 14 c. Lead 206 d. 31 26 84 36 Kr е.

Q: 16.The atomic masses of * Cl (75.53 percent) and "Cl (24.47 percent) are 34.968 and 36. 956 a.m.u.,…

A: Introduction: Chlorine belongs to group 17 elements with atomic number 17 and mass 35.45 amu. Group…

Q: Silver is composed of two naturally occurring isotopes: Ag-107 (51.839%) and Ag-109. The ratio of…

A: First calculate the percent abundance of Ag-109.

Q: 39. A 540-g aluminum rod contains A. 20.0 mol of aluminum B. 540 Al atoms C. 1.2 x 1024 Al atoms D.…

A: A) Moles = Mass / Molar Mass Molar Mass of Al= 26.98 g/mol So Moles of Al= 540 /26.98…

Q: (d) CO(NH2)2 (aq) + H2O (1) 2 CO2 (g) + 2NH3 (g) AH = +28.4 kkal (e) N204 (g) 2NO2 (g) AH = +14 kkål…

A: "Since there are multiple sub-parts in this question and it is not mentioned that which one has to…

Q: Question attached

A: When two atoms have same atomic number and different mass number, they are called as isotopes.

Q: 22 11. Find the mass in grams of 2.54 x 10 molecules of H,SO,.

A: Number of molecules of H2SO4 = 2.54 × 1022 molecules. Mass of H2SO4 (in grams ) = ?

Q: Bromine also occurs in nature as two isotopes. What is the specific mass of each isotope? What is…

A:

Q: 18. How many moles of gold atoms do 3.45 X 1044 gold atoms constitute?

A: We know that the number of atoms is given by below expression  number of atoms = moles X avogadro…

Q: 17. 75.21 °C, Ca(s) + 2 H,SO, () → CaSO,(s) + SO2 (g) + 2 H20((0) 18. 982 K, C¿H2 (9) + 5 N,0(g) → 2…

A: Given Reaction C2H2(g) +5N2O(g) →2CO2(g) +H2O(g) +5N2(g)To calculate ∆G° at 982 k∆G° = ∆H°-T∆S°∆H° =…

Q: 1)the chemical symbol found on the periodic table is ?  2) the number of protons for the product is…

A: 1.Now we know that the number must be same on both the product as well as the reactant Side and we…

Q: 4.53 Classify the following redox reactions as combination, decomposition, or displacement:

A: Since you have posted questions with multiple subparts, we will solve the first three sub parts for…

Q: À 7.45 g sample of calcium carbonate completely decomposes into calcium oxide (lime) and carbon…

A: Answer :-  1) only 3  i.e. The original solid is not an element.…

Q: One atom of an unknown element has a mass of6.66 × 1 0 -23 g. What is the identity of this element?

A: Molar mass is the mass of Avogadro's number (6.022×1023) atoms.

Q: 7. How many particles are present in 0.24 moles of carbon? 5.8 · 1023 particles 2.5 · 1024 particles

A: Mole is the unit of measurement of substances which may be atoms, molecules, ions, or electrons.

Q: How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of Au = 197.0 g/mol

Q: (c) 54.5% C, 9.2% H, and 36.3% O by mass

A: given :-  percentage composition of C = 54.5%  percentage composition of H = 9.2%  percentage…

Q: What Is CHEMICAL COMPOSITION?

A: To find: The definition about chemical composition

Q: A sample of 5.000 g of nitrogen can be combined with 5.714 g of oxygen to form nitric oxide gas…

A: The amount of products formed for the given quantity of reactants is determined using stoichiometry.…

Q: a. b. C. d. 'Н CI 1. BULI, -70 °C to +20 °C 2. H₂0 1. BuLi, -70 °C to +20 °C 2. H₂0 NMe2 OMe NH3 NH3…

A:

Q: b) 781 g C3H,Cl, c) 0.756 g calcium hydroxide d) 9.94 g cobalt(III) bromide e) 8.80 g ammonium…

A:

Q: 28) 8.42 x 1027 atoms of tin 29) 6.39 x 1018 atoms of sulfur

A: Given  8.42 × 1027 atoms of tin  6.39 × 1018 atoms of sulfur  5.99 × 1030 molecules of SiO2

Q: 3. Mg(NO,), Mass of Mg- 24.3 x 1- 243 g/ Mass of N- Mass of O-

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

Q: 26. 78) 6.347 x 10°atoms of nickel(III) sulfide has a mass of

A: Given, number of atoms of nickel(III) sulfide =6.347×1026 atomswe are asked to calculate the mass of…

Q: 2T) A comprnd Cim 15 5.१५°% Olygen is 5.9496 mass of this com A) what Is the B) what IS the

A: Percentage of hydrogen = 5.94 %  Percentage of oxygen = 94.06 % Molar mass of compound = 87.55 g/mol

Q: Need help

A: The mass of water in oxalic alumina is determined as,

Q: Strontium nitrate consist of 72.8 mmol. How many pg of substance is this? The answer must be 1.54 x…

A:

Q: .763 Za" (ag) +2+2n(s) -166 A*() + Alja) Mg*(a) +2e Mgla) O zn Osn

A:

Q: 1) BH3-THF, THF -78 °C K) 2) NaOH, H202 1) MgBr THF then "NH, "CI 2) PCC, DCM, rt LAH M) THF, -40 °C

A:

Q: mass Al = 27.0g A1 find the mass of AI mole AI जनद y=.073750. f

A: Given, y ( 27.0 g Al / mole Al )  y = 0.02375        Required,                          Mass of Al…

Q: (c) 1. O, -78 °C ? 2. Zn, HOAC

A: O3 is oxidizing agent . it oxidised alkene to carbonyls.

Q: natural rubidium has the average mass of 85.4678 AMU and is composed of isotopes Rb 85 (mass =…

A: Average atomic mass = ∑i=1XiMiWhere X = mole fraction of the isotope and M is the mass of the…

Q: 1. РCl, 2. OF2 3. PCl,*

A: The question is based on the concept of chemical bonding.   by using VSEPR theory , we have to…

Q: 10.91 9/mol 2) KOHH 3) BeCla )CI = a(35 45)= 0.91 g /mol 5) Big 2CF lir keti l-15-aa

A: 3.Molar mass of BeCl2  Be mass = 9.012 g/mol        Cl mass = 35.5g/mol BeCl2 = 9.012 + (2×35.5) =…

Q: Una masa de mercurio ocupa 0.750 L Qué volumen ocuparia una masa igual de etanol? La densidad del…

A: Note - Since you have asked multiple question, according to our policy, we are supposed to solve…

Q: Natural rubidium has the average mass of 85.4678 u and is composed of isotopes85Rb (mass = 84.9117…

A: Mass of the Rb = 86.913 amu. Given data: 85.4678 amu is average mass of the Rb Mass of 85Rb =…

Q: A sample of a compound synthesized and purified in thelaboratory contains 25.0 g hafnium and 31.5 g…

A: GIVEN: Mass of Hafnium = 25.0 g Mass of tellurium=  31.5 g Mass of Hafnium present in the sample…

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

Q: 1. BZOOBZ, NBS, CCI4 2. Mg, THF; then Pd°Ln, PhBr 3. HNO3, H2SO4 4. Zn, HCI

A:

Q: НО Bu Bu 1; 2 `Me `Me "Ме + O2N O2N 1. 9% 2. 88% N°C 1. 91% 1. BuLi, THF, -78 °C 2. 12% 2. BuLi, 0,1…

A:

Q: Elements Reactants 1 Reactants 2 Nuclear Reaction Deuterium Tritium Helium (Stable) Lithium

A: Nuclear reactions are those in which fusion and fission process are involved. In these reaction…

Q: 13) A 44.8 g rhodium sample contains how many rhodium atoms? B) 2.74 x 105 atoms A) 2.62 x 1023…

A:

Q: 2.A student says,“A carbon atom is not the smallest possible amount of carbon, because atoms are…

A: Atoms are made up of smaller particles like electrons, protons and neutrons. Similarly, a carbon…

Q: Cलकावैक he य रिचक इन्कोपारक क कुनेज्ञ प्रनंje \৪০ 184 188 74 १५ 74 74 व) पकांकी nueiबिर र काकम्मे…

A: Radioactivity is a nuclear phenomenon where a heavy unstable nucleus undergoes spontaneous decay and…

Q: Based on the law of conservation of mass, if the total mass of reactants is 22 g, what will the…

A:

Q: 6) A 0.1803 g sample containing only Pb,O, and inert matter gives 0.2378 g of PbSO. Calculate the…

A: According to guidelines here we solve first question, i.e., question number 6, please ask other…

Q: 1). (NH4);PO4 + Pb(NO3)a > Pb3(POa)a +. _NH,NO3 23.98 grams of lead (IV) nitrate are needed to…

A:

Q: 1.21 x 1028 atoms of oxygen gas (o,)? 1 mol = 6.02 x %3D F7 FB F9 F10 F11 F12

A: Number of Molecules of O2 gas = ( Number of atoms of O2 gas / 2 )  Number of Molecules of O2 gas = (…

Q: Calculate the mass of sample. 72.1 mmol SO2

A: Given:  The number of moles of SO2=72.1  mmol=72.1×10-3mol The molar mass of…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.