H. Ex: Isotopes of Boron: Boron contains 10B (10.0129g/mol) and 11B. 1°B is 19.91% abundant. Based on the average molar mass of boron from the periodic table, calculate the molar mass of 11B.

Q: estion 31 of 39 Element X forms three different compounds with element Y. Information about these…

A: There are three compounds which involve element X and Y.  We have given mass of element Y per gram…

Q: How many kilograms of NaCl contain 3.49 x 10 ions? There are 2 moles of ions per mole of NaCl, and 1…

A: Given  number of ions of NaCl= 3.49 x 1025 ions molar mass of NaCl = 58.5 g/mol 1 mole  = 6.022 x…

Q: If the m. Wt. of BaSO4 = 233.42 g/mol %3D and m. Wt. of Na(SO4)2= 140.02 g/mol and wt of…

A:

Q: Manganese sulfate forms the hydrate MnSO4⋅?H2O(s)MnSO4⋅nH2O(s) . If this hydrate is heated to a…

A: Given : Mass of MnSO4.nH2O taken = 10.140 g And mass of MnSO4 produced = 9.0592 g The mass of water…

Q: A brass alloy contains 78.9% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A: We have to predict the moles of Zn and atoms of Zn.

Q: Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation…

A: Molar mass of D2O = (2.014 x 2) + 16 = 20.028 gm/mol Molar mass of ND3 = 14 + (2.014 x 3) = 20.042…

Q: he amounts of gold (Au) in the crowns of three members of the royal family of King Midas are shown…

A: 1mole of a substance contains Avogadros's number of atoms( 6.022×1023).

Q: element b forms a chloride BCl3 containing 46.62% chlorine by mass. what is the identity of this…

A: Consider the molecular mass of the compound BCl3 which is formed by the combination of an unknown…

Q: 2. Consider the complete re If one starts with 20.0mL 0.5M a) The mass of K2CO3 neu

A: The chemical reaction is given below: K2CO3 +2HCl ----------------> 2KCl+H2O+CO2

Q: A Freon™ leak in the air conditioning system of a large building releases 12 kg of CHF2Cl per month.…

A:

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: Q/ calculate of the molar mass (Al2(OH)3 * ,Al=26.98, O=16,H=1

A: The molar mass is the weight of one sample mole. Connect the atomic masses (atomic weights) of all…

Q: 12. If that hamburger contains 3.1 x 10 moles (or 0.000 000 31 moles) of selenium, how many grams of…

A: Given, Moles of selenium = 3.1 × 10-7 moles Note: Atomic mass of selenium = 78.96 g/mol Mass (in…

Q: [References] A1.782-g sample of coal contains 1.584 g C. Calculate the mass percentage of C in the…

A: Given data, Mass of coal sample = 1.782 g Mass of carbon = 1.584 g Mass percentage can be calculated…

Q: Calculate the mass CARBON in 0.0299 moles of C6H12O6.

A: A pure compound is that which contains its constituent atoms in fixed ratio by mass.C6H12O6  is a…

Q: 7. How many sodium atoms is equal to five moles of the atoms? а. 5 b. 3.011 x 1024 с. 500 d. 6.022 x…

A: Mole represent  amount of substance present in any matter.

Q: When barium (Ba) reacts with sulfur (S) to form barium sulfide (BaS), each Ba atom reacts with an S…

A: Calculate the amount of S. Mass of the sulfur=Volume (density) Mass of the sulfur=1.75 cm3(2.07…

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: How many moles of Sn are there in a sample of Sn that contains 2.38x10^24 atoms

A: Number of moles = Given no. of atoms/NA NA = Avogadro's number = 6.022 x 1023 Number of Sn atoms  =…

Q: Suppose 2.367g of TiO2- containing sample evolves 0.143g of O2. What is the mass percent of TiO2 in…

A: The equation involved in the determination of purity of TiO2 sample is as follows.…

Q: 9.21 x10^19 molecules of hydrogen gas,(H2) are equal to how many grams of hydrogen gas?

A: Number of molecules = 9.21 × 1019 molecules Avogadro’s constant = 6.022 × 1023 molecules Numbre of…

Q: oxygen atoms

A:

Q: If 2.06 mL of seawater contains about 6.91×10-14 moles of gold, how many atoms of gold are in that…

A:

Q: 1. Calculate the number of grams in one mole of CaSO,7H2O? (Atomic weight Ca-40 ,S=32 ,0=16 ,H-1).

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

Q: A Freon leak in the air-conditioning system of a large building releases 12 kg of CHF2Cl per month.…

A: The ratio of the given mass to the molar mass is called as moles. Mathematically, Given, Mass of…

Q: 9. Using the following reaction 2NaBr +CaF, →2NAF+ CaBr2 If 6 moles of CaF2 were added, what mass of…

A: Given  moles of CaF2 = 6 moles Molar mass of  CaBr2 = 199.9 gm/mole Mass of CaBr2= ?

Q: 4) An evil scientist is attempting to split up uranium hexafluoride, UF6, into its componer…

A: Given: Compound= UF6Mass of uranium obtained = 70.5 gMass of fluorine obtained = 36.3 g The…

Q: mol AB-016 A student was given a sample of hydrated Na2CrO4 (molar mass of anhydrous Na2CrO4. 162.0…

A: Number of moles of anhydrous sample and water is calculated as above,

Q: If 5.35 g Cu(NO3)2 is eventually obtained, how many grams of nitrogen monoxide, NÓ, would have…

A:

Q: A brass alloy contains 78.6% copper, Cu, by mass with the remainder of the alloy being zinc, Zn.…

A:

Q: mole of Fl(OH)2 would have a mass of how many grams

A: Given -> Molecular formula= Fl(OH)2 Number of mole = 1 mole

Q: Element Molar Mass (/ 14.01 16.00 24.31 32.07 55.85 1. The molar mass of sulfur is 32.07 s/mol. This…

A:

Q: The Statue of Liberty in New York harbor is made of 2.00×10^5 pounds of copper sheets bolted to an…

A: Given: Mass of copper sheets=2.00×105 lb 1 lb=453.592 g Mass of copper (in grams)=907.184 ×105 g The…

Q: what mass of each product is formed?

A: Given :- mass of NH4NO3 = 45.70 g To calculate :-  Mass of N2O  Mass of H2O    Note :- The…

Q: A certain metal oxide has the formula MO, where M denotes the metal. A 39.46-g sample of the…

A: Given the mass of sample = 39.46g Mass of metal left after heating = 31.70g The atomic mass of metal…

Q: Which weighs less, 0.25 mole of xenon atoms or 2.0 moles of carbon atoms?

A: The mass of 0.25 mole of xenon atoms can be calculated as

Q: 4. How many grams would 2.5 moles of magnesium (Mg) weigh? 5. How many grams would 10.0 moles of…

A: 4) Given : Moles of Mg = 2.5 mol Since atomic mass of Mg = 24.3 g/mol Hence mass of Mg = moles X…

Q: 1. A prospector panning for gold in a river collects 15.00 g of pure gold. How many Au atoms are in…

A: According to mole concept, 1. 1 mole of a substance = molar mass of the substance.Eg- 1 mole ammonia…

Q: calcuya te 6011owing (a) ob molecues in 0•250 moles ob NH3 Num ber un

A: According to mole concept, 1 mole of any substance is equal to the Avogadro number (6.022 × 1022)…

Q: The Mole Concept Sulfur compounds are converted to H2SO, while NO, compounds are converted to HNO3,…

A: Sulfur compounds are converted to H2SO4 while NOx compounds are converted to HNO3 and NH3 reacts…

Q: 9.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: According to the question, we need to find out the molecular formula of the hydrocarbon X.  We have:…

Q: What does a chemical equation show? A. The reactants and products in a chemical reaction B. The…

A: Solution 7). A chemical reaction always shows reactants and products

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: How many grams of O are found in 7.40 x 1024 atoms of NO3- was produced?

A: 1 mol is equal to 6.022*10 raise to power 23 atoms. Mole in chemistry, a standard unit for measuring…

Q: How many moles are in 130 gram of N?

A: Given :-  Mass of N = 130 g  Atomic weight of N = 14.01 g.mol-1  To calculate :-  Number of moles of…

Q: Calculate the mass of antimony(III) lodide, Sblg, that can be produced by the reaction of 143 g of…

A:

Q: To prevent the presence of air, noble gases are placed over highly reactive to act as inert…

A: The partial pressure of a gas in a mixture of gases is equal to the total pressure multiplied by the…

Q: 4 g of Y reacts completely with oxygen. The following equation (ii) represents the reaction. 4 g Y…

A: From now onwards, please, post the question in English only. We have to predict the mass of product…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".