Thiophene is a liquid compound of the elements C, H, and S. A sample of theophrastus weighing 7.96 mg was burned in oxygen, giving 16.65 mg CO2. Another sample was sujected to a series of reactions that transformed all of the sulfur in the compound to barium sulfate. If 4.31 mg of thiophene gave 11.96 mg of barium sulfate, what is the empirical formulas of thiophene? It's molecular mass is 84 amu. What is its molecular formula?

Q: 2. A compound has the following chemical formula; CuAl6(PO4)4(OH)8 4 H₂O. Calculate the mass…

A:

Q: An ionic compound MX3 is prepared according to the following unbalanced chemical equation.   M  +…

A: The number of moles of X2 (nX) is calculated using equation (1) in which N is the number of…

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: Calculate the mass in grams of 1.10 x 104 molecules of Sulfane, H2S. g NA= 6.022 x 1023

A: Mass of H2S in grams = 6.210 g

Q: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 100 g of iron sulfide was reacted with excess oxygen,…

A: 3 FeS2   +  11 O2   →  Fe3O4   +  6 SO3 Atomic masses Fe=56; S=32, O=16 Molecular mass of…

Q: The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of…

A: Molar mass of any element is equal to the atomic mass of that element in the unit of grams. Molar…

Q: Two elements, R and Q, combine to form two binary compounds A and B. In the compound A, 10.50 g of R…

A: The law of multiple proportions states that if two elements combine with each other to form more…

Q: Using the density of argon= 1.54 g/L, how many argon atoms are present in a room with dimensions of…

A: To solve this problem first we calculate the volume of room and then we will calculate the mass of…

Q: Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum…

A: Given information: Mass of Al2O3 = 12.4 kg Mass of NaOH = 57.4 kg Mass of HF = 57.4 kg

Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

A:

Q: Calcium silicate is an important mineral compound that can be prepared by the reaction of calcium…

A: Given balanced chemical equation is:          2 Ca3PO42aq + 6SiO2s → P4O10aq + 6CaSiO3s Mass of…

Q: A chemical reaction was used to produce 1.46 moles of copper(II) bicarbonate, Cu(HCO3)2. What mass…

A: To produce 1.4 moles of Cu(HCO3)2

Q: How many moles of Cu(NO3)2 are in 3.4 x 1022 molecules? Please have your answer in decimal format…

A:

Q: Suppose you need 7.0 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A: Given data :- Length of required tow chain = 7.0 mGrade of tow chain = 70 Diameter of tow chain =…

Q: chemical formula

A:

Q: A student is running an experiment in which 48.1 grams of MgBr2 is needed, but the only jar of…

A: Given Mass of MgBr2 needed = 48.1 g

Q: 6.90 x 1024 formula units of sodium nitrite, NaNO₂ Express your answer with the appropriate units.…

A: Multiple  questions

Q: 2. What is the mass (in grams) of 7.11 X 102 molecules of tetraphosphorous trisulfide?

A: Given, number of molecules = 7.11×1022 Avogadro's constant = 6.022×1023 molecules.mole-1

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: What is the mass, in grams, of 9.15 x 1024 molecules of methanol (CH3OH)?

A: Given that, number of molecules of methanol =  9.15 x 1024

Q: Manganese(Mn) is a transition element essential for the growth of bones. What is the mass in grams…

A: Manganese is represented by atomic symbol Mn and it is a transition element. Also, it can be said…

Q: Calculate the amount of  anions (in moles) in 8.6 g of magnesium perchlorate. Express your answer…

A: Magnesium perchlorate, Mg(ClO4)2 dissociates into three ions as given by the equation: Mg(ClO4)2 →…

Q: A sample of aluminum contains 2.91 x 1022 atoms of aluminum. What is the mass of this sample?…

A: Number of aluminum atoms = 2.91 x 1022 atomsmass of sample of aluminum = ?Note: Avogadro’s number:…

Q: A 30.141 mg sample of a chemical known to contain only carbon, hydrogen, sulfur, and oxygen is put…

A: To determine the empirical formula , we would determine the moles of Carbon, Hydrogen , sulfur and…

Q: A 2.1880 g sample of a hydrate of Cu(NO3)2 was heated to drive off all of the water of hydration.…

A: The objective of this question is to determine the value of 'x' in the formula of the hydrate…

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: We have to calculate molar mass of metal and it's identity.

Q: What is the mass, in grams, of exactly 230 sodium atoms? Would it be the same answer only in grams?…

A: Steps to convert atoms to grams • Convert atoms to moles - Divide the number of atoms with Avogadro…

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: Step - 1Formula for the compound = XBr3Means in 1 mol of compound 3 mol of Bromine are…

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 +…

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".