A 0.235 g sample of Manganese  (Mn) was heated in a crucible  and produced   0.372 g of  a compound MnxOy What is the empircal formula of MnxOy?

Q: There are two oxides of copper. One oxide has 20%oxygen, by mass. The second oxide has a smaller…

A: The copper metal possesses two oxidation sates that are +1 and +2. The two ions of copper are Cu+…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.042…

A: Mass of hydrogen gas produced = 1.042 g Molar Mass of hydrogen gas = 2.016 g/mol   moles of hydrogen…

Q: An oxide of chromium used in chrome plating has aformula mass of 100.0 u and contains four atoms…

A: Chromium (Cr) is the transition metal that belongs to group -6 and period-4 in the periodic table…

Q: A compound contains only carbon and hydrogen and has aformula mass of 28.06 amu. What is its…

A: Given data: Molar mass of the compound = 28.06 amu

Q: Chromium(III) nitrate forms a hydrate that is40.50% water by mass. What is its chemical formula?

A: If 100 % mass of Chromium nitrate is present and 40.50 % is the mass of water. Mass of anhydrous…

Q: A chromium containing compound has a formula FexCryO4 and is 28.59% oxygen by mass  Find x and y

A: Given, mass percentage of O in FexCryO4 = 28.59%Molar mass of 4 O in FexCryO4 = 4 × 16 g/mol = 64…

Q: 02% hydrogen. What is the empirical formula of this co mical notation is case sensitive ur chemical…

A: Assume total mass is = 100 g Element  mass(g) Mole= Mass/Atomic mass  Simplest mole ratio C…

Q: les of an element. What amount of gallium, in moles, does 8.34 g Ga represent? moles

A: Given , Weight of Ga = 8.34 g  We need to find moles of Ga  We know that molecular weight of Ga is…

Q: A compound contains only nitrogen and oxygen and has aformula mass of 44.02 amu. What is its…

A: The atomic mass of Nitrogen, N = 14.01 amu The atomic mass of Oxygen, O = 16 amu The atomic mass of…

Q: A sample contains 56.36% oxygen by mass, and the rest phosphorus. If the molecular mass is 316.40g,…

A:

Q: formula mass MgBr2.

A:

Q: A sample contains 11.8295 g  calcium and 41.1705 g bromine.  What is the percent calcium is in this…

A: Mass percent or weight percent of a substance is the mass of the element by the mass of the…

Q: A 3.75-g sample of limestone (CaCO3) contains 1.80 g of oxygen and 0.450 g of carbon. What is the…

A: Given,Mass of a sample of limestone, CaCO3 = 3.75 gMass of oxygen in this sample = 1.80 gMass of…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.442…

A:

Q: A 3.24-g sample of titanium reacts with oxygen to form 5.40 g of the metal oxide. What is the…

A: Titanium is a transition metal with the atomic number 22. It is a silver color metal which has…

Q: A sample of acompound is decomposed in thelaboratory and produces 165 g ofcarbon, 27.8 g of…

A: The given data contains, Carbon = 165 g. Hydrogen = 27.8 g. Oxygen = 220.2 g.

Q: A sample of ascorbic acid (vitamin C) is synthesized inthe laboratory. It contains 1.50 g of carbon…

A:

Q: Find the empirical formula of a compound, given that the compound is found to be 47.9% zinc and…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.092…

A: MZn + MMg = 20 g Mass of Zinc, MZn = X g Mass of magnesium, MMg = (20 – X)g Mass of Hydrogen gas =…

Q: What is the mass of 1 mole of viruses? How manj ymoles of viruses have a mass equal to the mass of…

A: Given: mass of virus is 9.0×10-12 mg mass of oil tanker is 3.0×107 kg To find: 1. Mass of 1 mole…

Q: A 13.0-g sample of titanium reacts with oxygen to form 21.6 g of metal oxide. What is the empirical…

A: Given that  Mass of Titanium reacted = 13.0 g  Mass of metal oxide formed = 21.6 g  Empirical…

Q: A 10.61 gram sample of a certain hydrate of copper (II) sulfate, is heated until all the water is…

A: The question is best on experimental technique of determination of molecular formula of the hydrate.…

Q: A 1.628-g sample of a hydrate of magnesium iodide isheated until its mass is reduced to 1.072 g and…

A: Given data mass of sample  = 1.628  g mass of sample after heating = 1.072 g…

Q: A compound is made by carbon, hydrogena and nitrogen and 1 g of this compound contains 91.5 mg of…

A: To write the molecular formula of the compound, the number of moles of each element should be…

Q: How many molecules of sugar would be contained in a teaspoon of sugar if it's mass is 8.5g. 11.

A:

Q: COM POUND USED LUNAK LAN DER, IT 60.109/mol- EX CESS OXYGEN A. COMBUSTI BLE IN THE APOLLO HAS A…

A: Note: Mass of Nitrogen is not given , so we can not calculate the exact composition of nitrogen but…

Q: An 85.00 g sample of an unknown compound contains 24.26 g molybdenum, 24.33 g sulfur, and the rest…

A: Given,  Mass of the compound = 85.00 g  Mass of molybdenum = 24.26 g  Mass of sulfur = 24.33 g  Mass…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: A compound that contains only copper and chlorine contains 2.363 g copper and 2.637 g chlorine. What…

A:

Q: A compound contains arsenic and oxygen as its only elements. A 1.626g sample of the compound…

A: A 1.626 g of the sample contain 1.060 g of arsenicSo, Oxygen = (1.626 -1.060)g…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.132…

A:

Q: Fluorite, a mineral of calcium, is a compound of the metalwith fluorine. Analysis shows that a…

A:

Q: A sample of a compound containing only carbon, hydrogen, and oxygen is found in analyzed to contain…

A: The simplest positive integer ratio of atoms present in a compound is represents the empirical…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.242…

A: The reactions occurring in the system are written below.

Q: A sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256 g of O…

A: The percentage of Magnesium and oxygen are calculated as,

Q: ta 1+ 77,) A bincury compound of boron ☆ hudregen hefs He following percentage compostion: 98.4%…

A:

Q: Fillm the name and emprical forla of cachionic compound that could be formed rom the tons n ths…

A: a) The ions given are Pb4+ and S2-.

Q: A 4.00 gram sample of hydrate of nickel(II) bromide loses 0.793 grams of water when heated.…

A: Mass of hydrated nickel bromide = 4 gWhen it heated it lose water of 0.793 g from nickel…

Q: Small amounts of tungsten (W) are usually added to steel to strengthen and harden the steel. Two…

A:

Q: What is the mass of 7.24x10 to the 23rd formula units of barium oxide?

A:

Q: A compound containing carbon and hydrogen has a molar mass of 56.11 g/mol and an emperical formula…

A:

Q: 2. When a 30.98-g sample of phosphorus reacts with oxygen, a 71.00-g sample of phosphorus oxide is…

A: Given: The mass of P=30.98 g Mass of compound, (Phosphorous oxide)=71 g. Mass of oxygen=(71-30.98)…

Q: A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.102…

A: Given, mass of mixture = 20.00 g Hydrogen gas produced = 1.102 g

Q: How many grams of the insecticide calcium chlorate must be measured if a sample is to contain 5.79 g…

A: Formula of calcium chlorate = ca(clo3)2 Molecular mass of calcium chlorate is 207g

Q: formula of the hydrate

A: When a hydrous salt is heated, it loses the water of crystallization. Water of crystallization =…

Q: ss in grams of CH:OH (MM = 32.04 g/mol) would nee

A: Molality (m) = moles of solute/maas of solvent(kg) Moles = mass/MM       = w/32.04  Mass of solvent=…

Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

A:

Q: Boric acid, H3BO3 is a mild antiseptic and is often used as an eye was. A sample contains 0.543…

A: Given: the number of moles of boric acid=0.543 mol. Molar mass of boric acid =61.83 g/mol To find:…

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.