Naturally occurring Metal with average atomic mass 79.7231 consists of two isotopes: 79M with mass 78.92558 amu and 81M with mass 80.924704 amu. What is the percent abundance of 81M? О а. 50% O b. 80% О с. 20% O d. 60% Ое. 40%

Q: What is the percentage composition by mass of potassium in potassium carbonate, K₂CO3. K 32218 19 Na…

A: Given,  Potassium carbonate ( K2CO3 )  The percentage composition of potassium (K) is:

Q: An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 130.79…

A: The isotope of the unknown element is given as 129X and 132X.  The average atomic mass of X is given…

Q: Upon burning Mg in air, magnesium oxide and magnesium nitride are formed. The correct statement…

A: Here, it is given that, upon burning magnesium in the air, magnesium oxide and magnesium nitride are…

Q: An unknown element is a mixture of isotopes 120X and 122X.  The average atomic mass is 120.70.  What…

A: Suppose percentage abundance of 122X = A percentage abundance of  120X = (100 - A) Fraction of 122X…

Q: Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature…

A: The variants of any element containing dissimilar neutrons number but similar protons number (atomic…

Q: the atomic masses of 10B and 11 B are 10.012938 and 11.009305 amu, respectfully. The average atomic…

A:

Q: 2Br + 2K* → Br₂ + 2K MM of K-39.10 g/mol MM of Br₂159.8 g/mol R=8.314 J/mol-K F-96,485 J/mol-V 4.77…

A: In electrolytic cell, oxidation and reduction reaction takes place simultaneously. The oxidation…

Q: Calculate the average atomlc mass of lithlum, whlch occurs as two Isotopes that RVU Mu following…

A: We need to calculate average mass from given mass and relative abundance of isotopes.

Q: The ratio of the mass of O to the mass of N in N20z is 12:7. An- other binary compound of nitrogen…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7 Mass of O in N2O3 = 3x16 amu…

Q: Only two isotopes of copper occur naturally, Cu (atomic mass = 62.9296 amu; abundance 69.17%) and Cu…

A: Given,First isotope:Copper atomic mass = 62.9296amu.Abundance = 69.17% = 0.6917.Second…

Q: he average atomic masses of some elements may vary, depending upon the sources of their ores.…

A: Explanation Solution Two substances, the percentage of each isotope, are unidentified. As both…

Q: Which of these statements is FALSE about the mole? O a. 1 mole is equal to 6.022 x 10 23…

A: Since you gave posted multiple questions, we are entitled to answer the first only.

Q: (a) In the certain hydrated salt MSO3:4H2O, the mass percentage of H2O is 44.71%. Identify the…

A: The mass percentage of an element is the mass of that element / total mass of the compound. We can…

Q: The ratio of the mass of Oto the mass of Nin N2O3is 12:7. Another binary compound of nitrogen has a…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7Mass of O in N2O3 = 3x16 amu…

Q: Compound 1 has a composition of 23 mass % of element A and 77 mass % of element B. A and B also form…

A: Law of multiple proportion:  As per the law of multiple proportion, if 2 elements form more than one…

Q: A Matter can not be created or destroyed, The mass of the reactants in a ch reaction will equal the…

A: Chemical bond is M Two types of chemical bonds are L Chemical reaction K Reactants F…

Q: M is a Group I metal. 0.5 mol of the metal sulphate weighs 71.05 g. What is the relative atomic mass…

A: The weight in gram of the number of atoms of an element present in 12.00 g of carbon-12 is relative…

Q: Nitrogen forms more oxides than any other element. Thepercents by mass of N in three different…

A: Empirical Formula: The empirical formula of a compound is the simplest whole number ratio of each…

Q: A made up element ey has three natural isotopes. The isotopes each have an atomic mass of 33.02…

A:

Q: 1. Naturally occurring chlorine that is put in pools is 75.53 percent"CI (mass = 34.969 amu) and…

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

Q: a)Using the data provided, determine the mass percent of water and the mass percent of anhydrous…

A: Given, mass of hydrated copper (II) sulfate: 131.4g mass of anhydrous copper (II) sulfate: 130.26g…

Q: Naturally occurring iron contains 5.82% 54Fe, 91.66 % 56Fe, 2.19% 57Fe, and 0.33% 58Fe.  The…

A: Answer:- This question is answered by using the simple concept of calculation of average atomic mass…

Q: Need help

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

Q: The naturally occurring isotopes of sulfur, their atomic masses, and abundances are: S-32 : 31.97207…

A: e. The average atomic mass of isotopes can be calculated using the following expression:…

Q: How many grams of magnesium are required to produce 4.380 kg of Siı? (At mass: Mg-24.31; Si-28.09)…

A: Recall the given reaction,  SiCl4  +  2 Mg                   Si  +  2 MgCl2   4.380 Kg of Si is…

Q: 1. Cobalt forms two sulfides: CoS and Co2S3. Predict the ratio of the two masses of sulfur that…

A: The sulphide of cobalt given are CoS and Co2S3. The oxides of lead are given are PbO and PbO2 The…

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

A:

Q: A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and height…

A: Density of a substance is given by the ratio of mass to its volume. Density = MassVolume Volume of a…

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

A:

Q: What is the balanced equation of the synthesis reaction of benzoin to benzil using the reagent…

A: The balanced reaction of benzoin with nitric acid in presence of acetic acid is given as

Q: Match terms with their definitions v Avogardo's number v Molar mass v mole v Atomic mass A. mass of…

A: The mole concept was proposed by Avogadro to specify the atoms, molecules, and ions concentration.…

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: O Cs20 > SnO2 > MgO > P4010 > Cl207 O C,0, > P4010 > SnO2 > Cs20 > MgO O MgO > Cs20 > P4010 > SnO2 >…

A: Applying concept of metalic character and electronegative of central atom.

Q: By using the atomic mass unit u= 1.6 x1024 gram, Avogadro's number will be equal to a) 6.02 x1022 b)…

A: The atomic mass unit is the unit of mass usually denoted by (amu). It is the parameter to express…

Q: Determine the number of atoms in a sample of 2.26 g Hg. O 6.78 x 10 21 atoms O7.53 x 10 22 atoms O…

A: Number of moles of a chemical element or a compound is used to measure the amount of element or…

Q: How many grams of magnesium are required to produce 3.000 kg of Si? (At mass: Mg=24.31; Si=28.09)…

A:

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: A brass alloy contains 87.7% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: The relative abundance and atomic masses are 0.337% (mass = 35.978 amu) 0.063% (mass = 37.963 amu)…

A: Average atomic mass of an element is the sum of the masses of its isotopes each multiplied by its…

Q: A hypothetical element, M, with average atomic weight of 35.75. M has three stable isotopes with the…

A:

Q: Naturally occurring chlorine that is put in pools is 75.53 percent 35Cl (mass = 34.969 amu) and…

A: Given : There are total 2 naturally occurring isotopes of chlorine Mass of isotope 1 i.e 35Cl =…

Q: A mixture of Thallium was made that contained 60.0 % 203TI and 40.0% 205TI. The mass of 203TI and…

A: Given, Percentage of the abundance of 203Tl isotope = 60% Mass of 203Tl isotope = 202.97 amu…

Q: 5. (. a) 3.68 x 1025 How many nitrogen atoms are there in a 346 g sample of pure ammonia (NH3,…

A: Given : Mass of ammonia = 346 g And molar mass of ammonia = 17.031 g

Q: 1A 2A 8A Atomic Number 1 E ЗА C 1 W 4A 5A 6A 7A G Zy 6. 4. K V P. Ad 8. 6. 10 11 12 13 14 15 Q U H.…

A: Amount of product formed is defined with the help of Limiting reagent using stoichiometric…

Q: The atomic weight of Aluminum element is 26.981 g/mol and atomic number is 13, the number of…

A:

Q: In the following How many Fe atoms How many O atoms How many S atoms Fez(SO4)a

A: The number of atoms present in Fe2(SO4)3 has to be given.

Q: Mass of ground pill Volume of KMNO, Moles of KMNO, Moles of Fe2+ Moles of FeSO, • 7H,O Mass of FeSO,…

A: Given: Molarity of KMnO4 = 0.0114809 M Balanced reaction : MnO4− + 5 Fe2+ + 8 H+ → Mn2+ + 5 Fe3+ + 4…

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

A:

Q: The atomic weight of Ga is 69.72 amu. There are 69.0 amu, and Ga, with a weight of 71.0 amu. The…

A: Let the percentage of the isotope 69Ga be =x%Then,The percentage of the isotope 71Ga is =(100−x)%

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: Step 1        N2O3Mass of Oxygen in N2O3 = 16x3 =48gMass of Nitrogen in N2O3 = 14x2 = 28gMass of…

Group 14 Elements

The following elements come under group 14 of the periodic table.