A 6.791 gram sample of chromium is heated in the presence of excess bromine. A metal bromide is formed with a mass of 38.10 g. Determine the empirical formula of the metal bromide. Enter the elements in the order Cr, Br empirical formula =

Q: Normal saline is an isotonic (to humans) solution which is used in medicine for volume…

A: Given: Concentration of NaCl in saline = 0.9 g/dL. And volume of saline solution = 1 L Since 1 L =…

Q: 16. The mineral enargite is 48.41% Cu, 19.02% As, and 32.57% S by mass. What is the empirical…

A:

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A: Hypothetical element El Hydroacid, HEl Reaction; H2O + HEl  = H3O+ + El-   Molar mass of HEl =…

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

A: In this question, we will see the correct statement for Magnisium nitride.  You can see details…

Q: A 0.549 g sample of manganese metal reacts with excess sulfur to give 1.191 g of manganese sulfide.…

A: Answer: Molar mass of Manganese metal is 54.9g/mol Given mass of Manganese metal is 0.549g Since,…

Q: 0.172 g of Mn was heated in the presence of oxygen to make 0.272 g of MnxOy.  Based on this data,…

A:

Q: A sample of an iron alloy contains 89.4 g Fe, 2.50 g C, and 1.47 g Cr. Calculate the percent by mass…

A: Given :-  Mass of Fe = 89.4 g  Mass of C = 2.50 g  Mass of Cr = 1.47 g  To calculate :-  Percent by…

Q: 27.) What elemental analysis of a substance shows that it consists of 52.2%C, 34.7%O anf 13%H by…

A: It is a chemical formula that shows the simplest ratio of elements present in compound rather that…

Q: 4.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Given that, 4.0 g of a compound X is made of carbon, hydrogen and perhaps oxygen. The molecular…

Q: Barium reacts with water to produce barium hydroxide and hydrogen gas. When 5.489 g Ba is combined…

A: Given: Mass of Ba = 5.489 g Mass of H2O = 53.00 g Mass of Ba(OH)2 produced = 6.849 g Chemical…

Q: A 1.740-g sample of coal contains 1.584 g C. Calculate the mass percentage of C in the coal. Mass…

A: Mass percentage of C = 91.03 %

Q: (V,Os) (1.0 × 10º)- Calculate the mass of vanadium(V) oxide that contains a million vanadium atoms.

A: Given : number of V atoms = 1.0 × 106 atoms  To calculate :- mass of V2O5

Q: The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centemeter of Cr?

A: Mass = Volume x density Number of moles = Mass/molar mass Number of molecules = 6.0224 x 1023 x…

Q: Calculate the empirical formula for 1.386 g Zn, 5.381 I

A: Given,

Q: Over the years, the thermite reaction has been used for welding railroad rails, in Fez Os (8)+2A1(s)…

A:

Q: Madagascar is one of the most important gem-producing countries. three tonnes of Madagascar rock…

A: In order to solve this question, we will be using basic mole concepts. Also, since you have asked…

Q: Calculate the mass (in g) of 1.2 x 1024 atoms of molybdenum, Mo.

A: using mole concept , easily determination of atoms , molecules and ions possible.

Q: A sample of 5.304 grams of a compound containing carbon and hydrogen reacts with oxygen at elevated…

A: Note: due to guidelines, we have to do 3 subparts.

Q: A sample of a “suboxide” of cesium gives up 1.6907% of its mass as gaseous oxygen when gently…

A:

Q: What is the mass percentage of O in C,H,O,? 42.051 % C 8. 9. +/- x 100 3. 2. 4. 7,

A: Given: C3H8O2

Q: If 2.50 g of aluminum metal is heated in Fluorine gas it’s found that 5.28g will combine with…

A: Given data,  Mass of aluminium = 2.50 g  Mass of F = 5.28 g

Q: A sample of an oxide of vanadium weighing 4.589 g was reduced with hydrogen gas to form water and…

A: Solution :    The empirical formula gives the simple whole-number ratio of elements present in a…

Q: A sample of calcium nitrate crystal hydrate with its mass of 1.1808 g was heated at 150oC resulting…

A:

Q: A 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A:

Q: The atomic mass of 6/3Li and 7/3Li are 6.0151 any and 7.0160 amu, respectively. Calculate the…

A: Average atomic mass- Naturally occurring element exists as mixture isotopes. Isotopes are with…

Q: If carbon has a molar mass of 12g and oxygen has a molar mass of 16g. What is the molecular mass of…

A: Consider the given information is as follows: Molar mass of carbon = 12 g Molar mass of oxygen = 16…

Q: Balance the following equation:   _____ Nm2Bf3 (aq) + _____ Cv (s) à ______ Cv2Bf (aq) + _____ Nm…

A:

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A: The given molar mass of the elements are as follows:- H: 1.00784 g/mol O: 15.999 g/mol El: 156.31965…

Q: A 0.500 g sample of tin foil reacted with oxygen to give 0.635 g of product. (a) What is the…

A:

Q: 8.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Given :  Mass of compound = 8.00 g  Molar mass of X = 138. g/mol  Mass of CO2 formed = 17.86 g  Mass…

Q: What is the mass of 1.67 x 1025 molecules of water in a 0.5 L Ozarka bottle?

A:

Q: The reaction between methanol and oxygen gas produces water vapor and carbon dioxide. 2 CH,OH(1) + 3…

A: From the reaction it is clear that 2 moles methanol and 3 moles oxygen reacts to give 4 moles water…

Q: A metal (M) forms an oxide with the formula M₂O. If the oxide contains 3.835% O by mass, what is the…

A: Formula of metal oxide is M2O. Molar mass of oxygen is 16 g.mol-1.  Consider the molar mass of metal…

Q: How many grams of oxygen does it contain? What is the percentage by mass of nitrogen in the…

A:

Q: 1.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A:

Q: 4. Cr(NO3)3 is chromic (III) nitride. 5. Ca(NO2)2 is cadmium nitrate.

A: ->Cr(NO3)3  ->Ca(NO2)2

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A:

Q: In a chemical reaction, atom type, atom number and total electrical charge is conserved. According…

A:

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: Consider the following compound for questions 2 through 5. Sr3(PO4)2•4H2O Calculate the…

A: Given compound is Sr3(PO4)2•4H2O The theoretical percent strontium by mass in Sr3(PO4)2•4H2O = Mass…

Q: Write the chemical equation for the word equation below. Each blank should be a different substance…

A:

Q: A certain organic compound has the formula C9H11O3. A sample of this compound weighs 3.4 grams.…

A: The formula of the organic compound is C9H11O3. The molecular mass of the organic compound=9 x 12 +…

Q: What is the mass percentage of chlorine in iron (III) chloride (FeCl3)?

A: Mass percentage of chlorine = (mass of Cl in FeCl3 / Molar mass of FeCl3) x 100

Q: If 0.5843 g of magnesium filings are part of the Grignard reaction, how many millimoles of magnesium…

A:

Q: Use the References to access important values if needed for this question. Mn, S O, n H20 is the…

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…

Q: From this data, what empirical formula of magnesium oxide.

A: Mass of oxygen added = 35.1556 - 35.0079 g Mass of Oxygen = 0.1477 g Moles of oxygen = mass / molar…

Q: 1. A sample containing only CaCO3 (100.0869) and MgCO3 (84.3139) was ignited and carbonates…

A: Molar mass of CaCO3 = 100.0869 g/mol Molar mass of MgCO3 = 84.3139 g/mol Molar mass of CaO = 56.0774…

Q: An antacid tablet weighing 0.928 g contained calcium carbonate as the active ingredient, in addition…

A: Since you have posted multiple un-related questions, we are entitled to answer the first only.

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.