The transparent form of beryl (molecular formula = BegAl2Si6O18) that is green is called emerald. What is the mass % silicon in an emerald? 20.69% 25.00% 31.35% 5.231% 35.07%

Q: Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of…

A: Here we are required to find the percentage of anhydrous copper chloride

Q: Q6. What is the radius (in cm) of a cylindrical silicon block (density = 2.03 g/cm3) with the height…

A: The radius of cylindrical silicon block can be easily determined by its density and the total mass…

Q: 1. A mixture of gases has the following composition by mole: % by Mole 11 % Gas O2 CO2 N2 6% 83 %…

A: Number of moles = weight ÷ molecular weight

Q: To determine the amount of platinum in an alloy, a 8.565 g8.565 g sample of an alloy containing…

A:

Q: mixture of BaO and CaO weighing 2.212 g is transformed into mixed sulfates (BaSO4 and CaSO4)…

A: Two or more compounds combine together to form another compound or a mixture. The weight of the…

Q: What is the mass of H2SO4 in a 48.1 cm3 sample of concentrated sulfuric acid that has a density of…

A: The given question is related to analytical chemistry. The mass of any compound is equal to…

Q: professor Scimemi has accepted you as a Master’s student and you are involved in a project that…

A: You need to make 2.5 mM KCl. The formula for weighing is as follows: Amount of KCl (g) = [Molarity…

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: The mass of one mole of molecules is known as molar mass. We know that the molar mass of water is…

Q: What is the mass percentage of C in codeine, C₁₈H₂₁NO₃? Provide an answer to two decimal places.

A:

Q: In an experiment 0.500 gg of copper reacted with oxygen to give 0.563 gg of copper oxide. What is…

A: Answer 1:       Mass percentage of copper in copper oxide = given mass of coppergiven mass of copper…

Q: You are given a sample that contains a mixture of the following two arsenic-containing minerals:…

A: Given: Mass of mixture = 57.38 g Mass of As2O5 formed = 36.03 g Assuming moles of NiAsS in the…

Q: 1. What is the mass percent of C in C2O? 2. What is the mass percent of Ca in CaBr2? 3. What is…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The following reaction is known as the Haber Process. It is commonly used to make ammonia (NH3) for…

A:

Q: What mass of acetylene, C2H2, will be produced from the reaction of 38.3 g calcium carbide, CaC2,…

A: Given :- mass of CaC2 = 38.3 g  To calculate :- mass of C2H2   number of moles = mass/molar mass…

Q: Compound "X" has a density of 1.71 g/L at 755 mm Hg and 25 °C. What is the molar mass of  compound…

A: Density = 1.71 g/L Pressure =  755 mm Hg = 0.993 atm  ( 1 atm = 760 mmHg) Temperature = 25 °C =…

Q: Please answer questions 3a and 3b. Questions are provided in the attached image. Thank you.

A: Gravimetric analysis is a quantitative method through we can accurately determine the amount of…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: Mass relationship :- In these problem ,the mass of one of the reactants/products is to be calculated…

Q: Express 1:690 as a percentage strength. O 0.14% O 0.15% O 0.144% 0.149%

A: Given ratio are 1:690 is fraction number. To convert the ratio into percentage form , we must…

Q: A chemical plant uses electrical energy to decompose aqueoussolutions of NaCl to give Cl2, H2, and…

A: The given equation -  Calculate the number of moles of Cl2 - Now calculate the moles and mass for…

Q: For many years the recovery of gold—that is, the separation of gold from other materials—involved…

A: a.

Q: If a 88.2 gram charcoal briquette (assume pure carbon) is burned in an excess of oxygen, what mass…

A: Combustion :- The process of burning a substance in excess of air or oxygen is known as combustion…

Q: Equivalent weight of Al(OH)3 is а. 26 g O b. 27 g С. 78 д O d. 39 g

A:

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

A: Given: Mass of taconite pellet = 1 ton Mass of iron = 545 lb To Calculate: percentage of the pellets…

Q: If a fertilizer bag indicated that it contained 35 percent K2O, a. What does the analysis look like…

A: The percentage composition can be determined based on the molecular formula of the compound. The…

Q: The formula for lactose is C12H22O11, and the monohydrate is C12H22O11H2O. What is the percent by…

A:

Q: 1.Glucose is an important biological molecule with the molecular formula C₆H₁₂O₆. What is its…

A: 1.Glucose is an important biological molecule with the molecular formula is C₆H₁₂O₆. An empirical…

Q: Iron ore contains iron(III) oxide. In a furnace, the iron(III) oxide reacts with monoxide to form…

A: Mass of Fe2O3 = 10000 ton = 9.07 × 109 g

Q: Consider the production of copper metal from copper ore: 2 Cu3FeS3 (s) + 7 O2 (g) → 6 Cu (s) + 2…

A: The given balanced equation is: 2 Cu3FeS3 (s) + 7 O2 (g) ------>  6 Cu (s) + 2 FeO (s) + 6SO2 (g)…

Q: The ratio of Molar masses of C6H1206 and Water is O 1:10 342:18 O 10:1

A: Molar mass for any compound is the mass of 1 mole of compound. The atomic mass of each element is…

Q: An alloy of a metal containing Al, Cu and Ge is to be produced as follows: 10g of Cu is mixed with…

A: From the given information: Mass of copper in alloy = 10g Molar mass of Copper = 63.6 g/mol   Number…

Q: A chemist needs 1.28 g of sodium hypochlorite, NaOCl(s), for an experiment, but she only has sodium…

A: The mass of a compound can be determined by the molar mass of compound and the respective molar mass…

Q: Calcium sulfateis a white crystalline powder. Gypsum is a mineral, or natural substance, it is a…

A:

Q: What is the percent NaCl in the sample?

A:

Q: A major component of honey is fructose (C6H12O6) with a molar mass of 180.16 g/mol. A tablespoon…

A:

Q: What is the formula (solve for x) for the original hydrated sample of copper (II) sulphate? You…

A:

Q: How many chloride atoms are in 32.3 g of CaCl2?

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: Determine the number of moles and the mass requested for each reaction in the image.

A: The reaction of alkene with excess Bromine is as follows:   The molecular mass of C2H4 = 2×12+1×4 =…

Q: If the magnesium strip weighed 0.51 g, what would the theoretical yield (in grams) of H2 gas be?…

A: Given :- mass of Mg strip = 0.51 g  To calculate :- theoretical yield of H2 gas (in grams)

Q: You are given a sample that contains a mixture of the following two arsenic-containing minerals:…

A: Given : Mass of mixture = 57.38 g Mass of As2O5 formed = 36.03 g Assuming moles of NiAsS in the…

Q: Straight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula…

A: Given that :-  saturated carboxylic acids has the general formula CnH2n+1COOH  Atomic weights:- 1) C…

Q: 2. Calculate the following, with proper number of significant figures: Molar mass of Al(CH3COO)3 is…

A:

Q: Thin film of silicon , Si is used for fabrication of electronics components. What mass of SiH4  is…

A: For a balanced chemical reaction .aA+bB→cC+dDMoles of A reacteda=Moles of B reactedb=Moles of C…

Q: A fictional cubed-shaped bacterium, Bacterius cubis, occupies a volume of 2.8 femtoliters. This…

A:

Q: Part B How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce…

A: Balanced equation: CO2 (g)  +  4H2 (g)  -----> CH4 (g) + 2H2O (g) Number of mol of methane =…

Q: 01.)What is the molecular formula of a compound with the empirical formula As2O5and a formula mass…

A: Given values are,  Empirical formula= As2O5 And formula mass = molar mass= 459.678 amu Now from…

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".