A 15.21 gram sample of iron is heated in the presence of excess fluorine. A metal fluoride is formed with a mass of 30.74grams. Determine the empirical formula of the metal fluoride.

Q: 250 g of an alloy contains 52 wt% tin (Sn) and 48 wt% lead (Pb). The atomic weight of Sn is 118.7…

A: It is defined as amount of solute ( in grams) present in 100 g of solution is called " mass…

Q: The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of…

A:

Q: An element (A) has 5 isotopes. The masses (and abundances) of the isotopes 46A, 47A, 48A, 50A are…

A: Given:Average atomic mass = 47.87u.49A/50A = 3.361.

Q: 4. A sample of 2.12 g of copper was heated in an oxygen atmosphere until no further change took…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Polymer poly ethyl cyanoacrylate, also known as "Super Glue", has the following composition: 57.59%…

A: Percentage composition of carbon = 57.59 % Atomic mass of carbon = 12.01 amu Molar ratio of carbon =…

Q: A 0.455 g sample of magnesium is allowed to burn in 2.315 g of oxygen gas. The sole product is…

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Q: What is the chemical formula for each substance mentioned? (A). Sodium hydrogen carbonate  (B).…

A: What is the chemical formula for each substance mentioned?

Q: A metal (M) forms an oxide with the formula M2O. If the oxide contains 16.99% O by mass, what is the…

A: The given data contains, mass of Oxygen = 16.99 g. Thus mass of M= 100-16.99 = 83.01 g.

Q: What is the mass percentage of phosphorus in a sample of 8.53 phosphorus oxychloride containing a…

A: Mass percentage of phosphorus = 20.16 %

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: After the decomposition of sodium fluoride, the mass of fluorine produced is calculated by using the…

Q: The percentage by mass of nitrogen is 46.7% for a species containing only nitrogen and oxygen.…

A:

Q: On a periodic chart of the elements, molar mass (M), also called atomic weight, is often listed as…

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: 56.7 g of H,S reacts with 30.9 g of SO, according to this reaction + SO, 2H,S + So, = 35 + 2H,0 What…

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Q: What is the Process that produces elements in the stars? Give at least 10 sentece

A: Elements are formed by nuclear fusion. Stars create new elements in their cores by squeezing…

Q: Main-group elements are those in the columns 3A to 8A of the Periodic Table. True or Flase?

A: Representative elements are known as main group elements of the periodic table.

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) In the certain hydrated salt MSO34H2O, the mass percentage of H2O is 44.71%. Identify the…

A: The question is based on the concept of  Stoichiometry. we have been given a hydrate salt. we know…

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: ORE Formula metal ORE Formula metal Bauxite Al,O, -2H,O Al Zincite ZnO Zn Copper Iron Pyrites CuFeS,…

A: Given metals and their ores,

Q: Table 1: Molar masses of common rock forming elements Atomic Mass (amu) 28.09 Element Oxide (1)…

A: We can identify the valency of oxide are as follows Suppose the oxide formula is = MaOb(=2) Here,…

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: m/z values for a given elemental composition are calculated a. using the average atomic masses…

A: Mass spectrometry is branch of chemistry in which we deal with mass to charge ratio.

Q: An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with mass…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

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: The element silicon has 3 naturally occurring isotopes, 28Si (27.976927 u); 29Si (28.976495 u) and…

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Q: Matter is neither created nor destroyed in a chemical reaction. Thus, the mass of the products of a…

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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: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: For a compound consisting of two components A and B, mass% of A abd B are related to each other as…

Q: Why must atomic masses be weighted averages rather than conventional average values?

A: atomic mass is mass of atom which have amu unit .

Q: An unknown metal X, mass 1,20g , reacts during heating with oxygen and forms an oxide XO of mass 2g.…

A: The balanced chemical equation for the given reaction is,                                      2 X…

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

A: Hydrated Salt -  It is a crystalline salt to which water molecules are loosely bound.  Molar mass of…

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: A compound (molar mass= 324.41 g/mol) is used as a cardiac depressant. It has this percent…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: 127: An iron ore contains 38% Fe203 by mass. What is the maximum mass of iron that can be recovered…

A: 127. Given information, An iron re contains 38% Fe2O3 by mass Mass of iron ore = 10.0 kg

Q: Mass spectrometry is more often applied to moleculesthan to atoms. We will see in Chapter 3 that the…

A: When we study the interaction of electromagnetic radiation with matter then this study is known as…

Q: Calculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which…

A: Given : There are only 2 naturally occurring isotopes of Az. Mass of isotope Az-230 = 229.995 amu…

Q: 2. Explain how the chemical formulas H (aa and H.O for the same thing. are interchangeable notation…

A:

Q: An alcohol is 58.80 % C and 9.889 % H by mass. The rest is oxygen. What is the empirical formula of…

A: We can find the empirical formula of the alcohol using the given percentages of the element. Since…

Q: A block of gold (Au) has the dimensions (I × b x h) = 0.7600 in x 8.558 mm x 1.816 cm. 1 in = 2.54…

A:

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: The amount of sodium produced on decomposition of sample NaF is 28.8g. The mass ratio of sodium to…

Q: A cylindrical piece of pure titanium (Ti, density=4.506 g/cm^3) has diameter d=1.15 cm and length…

A:

Q: A fictitious element only has two naturally occurring isotopes: X and Y. If isotope X has a mass of…

A:

Q: Calculate the number of atoms in sample. 97.552 g Sn

A: We know that the 1 mole of a substance consists of 6.023*1023 number of atoms. (Mass of one mole of…

Q: Potassium ferric alum has the formula: KFe(SO,)2 .XH2O. A sample of 1.26 g of this alum was heated…

A: Answer

Q: A 27.27 grams sample of iron is heated in the presence of excess iodine. A metal iodide is formed…

A: To determine the empirical formula of the metal iodide.

Q: A 1.512-gram sample of aluminum metal was burned in the presence of oxygen gas, forming 2.857 grams…

A: Given,  1.512 g of Aluminium burns in oxygen gas to give 2.857g of binary oxide.

Q: 7. A 25.75 g sample of a nitrogen oxide was found to contain 6.68 g nitrogen and the rest oxygen.…

A: Problem 7 % Weight of an element in a compound = 100 x Weight of element/Weight of compound Weight…

Q: galena a mineral of lead is a compound of the metal with sulfer. Analysis shows that a 17.74 g…

A:

Q: The characteristic odor of decaying flesh is due to the presence of various compounds. One such…

A: Given data contains, Mass percent of carbon is 62.04%. Mass percent of hydrogen is 10.41%. Mass…

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.