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

Q: 5.50 g of a certain Compound X, known to be made of carbon and hydrogen, and to have a molecular…

A: First of all we will calculate the empirical formula and then molecular formula.

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

A: Recall the data, mass of X =8.50 g, MM=44 g mol-1 mass of CO2=25.50g, MM=44 g mol-1 mass of…

Q: 5. A compound with an empirical formula of CFBRO and a molar mass of 253.8 grams per mole. What is…

A: We have to predict the molecular formula of given compound.

Q: Caffeine, a stimulant in coffee and tea, a molar mass of 194.19 g/mol and a mass percentage…

A: Given,

Q: A compound's molar mass is 400 g/mol. Its percentage composition is 75.00% carbon, 5.05% hydrogen,…

A: Percentage composition can be used to find the moles of each atom present in the formula.

Q: A sample is found to contain 66.8% NaHCO3 by mass. What is the mass of NaHCO3 in 4.25g of the…

A: Mass percent :- The mass of a substance present in 100 grams of sample is called its mass percent .…

Q: 49. Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction…

A: Solution stoichiometry involves the calculation of concentration of solutions in the given…

Q: 6.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: We need to find emperocal formula then emperical mass

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: How many grams of chlorine gas can be produced from the decomposition of 73.4 g. of AuCl3 by this…

A:

Q: Mass of watch glass and evaporating dish:67.511 g   Mass of watch glass, evaporating dish, and Mg…

A:

Q: What amount in moles is 4.77x10^25 (to the power of 25) molecules?? 1.2.87x10^49 mol 2.79.2 mol…

A: Molecules = 4.77 x 1025

Q: H2N ОН IZ

A: 4 carbon atoms are present in above molecule.

Q: What's the percentage by mass of Cl in MgCl2 if it  is 24.6% Mg by mass?

A: Intrdouction : %age by mass of Mg = 24.6%

Q: A 52kg woman has 7.2 × 10⁻³ mol of hemoglobin (molar mass = 64456g/mol) in her blood. What quantity…

A: If the number of moles is known, Avogadro's number 6.022 x 1023 molecules, may be applied to compute…

Q: Alex has a big black tattoo of a teddy bear on their back. Iron (II, III) oxide was used as the…

A:

Q: 4. An alloy of solder is tin and lead. Calculate the number of moles of each metal that are pres-…

A: Given that an alloy of solder is Tin(Sn) and Lead(Pb) .  Percentage amount of Sn present in alloy =…

Q: Sulphur hexafluoride is produced by reacting elemental sulphur with fluorine gas. S8(s) + 24 F2(g) →…

A: Given that :  S8(g) + 24F2(g) ...> 8 SF6 Mass of S8 = 10.5g  Mass of F2 = 32.0g  We know molar…

Q: Phosporic acid (H3PO4) is a key ingredient in soft drinks that gives it a sharper flavor. One way to…

A: Given chemical reaction is  Ca5(PO4)3F + 5H2SO4    ==>    3H3PO4 + 5CaSO4  +  HF also given 24.5…

Q: A 10.00 gram mixture of NaHCO3 and N22CO3 was heated and yielded 0.0357 moles of H2O and 0.1091…

A:

Q: A- Balance The Equation NO2(g) + H2O(1) ------- HNO3(1) + NO(g) B- What is formula mass of K2CR2O7…

A: Balancing chemical equation, Molar mass and Empirical formula.

Q: Assuming one mole of compound, calculate the theoretical percentage composition of SO3. [MM (S) =…

A: Percentage composition  of element is defined as how much percentage of that element is present in…

Q: A 22.2g sample of lead (207.2 g/mol) was completely reacted with excess nitrogen (14 g/mol) in a…

A: Empirical formula :-  The chemical formula which shows only the  simplest mole ratio of atoms of…

Q: A 3.859 g sample containing impure CuCl2· 2 H20 was heated to constant mass. The sample mass after…

A: The impure sample of CuCl2.2H2O heating to drive off all the water then the mass of the mixture is…

Q: How many hydrogen atoms are in the compound (NH4)2CO3? Alex has a big black tattoo of a teddy bear…

A: #Q.1: The given chemical formula is (NH4)2CO3.

Q: . A compound with an empirical formula of C20H4 and a molar mass of 88 grams per mole. What is the…

A: 3) Given: Empirical formula = C2OH4  And molar mass = 88 g/mol.

Q: An aqueous solution is to be prepared that will be 3.87% by mass ammonium nitrate. What mass of…

A: Given :  Mass percent of ammonium nitrate = 3.87% Mass of solution = 1.23 kg To find  Mass = g…

Q: 3. What physical property of water and HCl allows us to separate them from the zinc chlorine…

A: Solution: We know the solubility principle i.e. likes dissolves like. Since HCl is the strong acid…

Q: Concentrated sulfuric acid contains 96.5% w/w H2SO4 in water. If the SG of concentrated H2SO4 is…

A: Given, Specific gravity - 1.84 Volume of the solution - 150 mL Concentration of H2SO4 - 96.5%(w/w)

Q: 8.00 g of iron when burned in air yields 11.44 g oxide. What is the empirical formula of this oxide?…

A: mass of oxygen= mass of oxide - mass of Fe(iron)

Q: I. Ferrous sulfate, FeSO. is a compound found in medicines that are used to treat iron deficiency in…

A: Given, Ferrous sulfate hexahydrate FeSO4.6H2O

Q: 2. Alex has a big black tattoo of a teddy bear on their back. Iron (II, III) oxide was used as the…

A: Given:  The chemical formula is :  Fe3O4 sol a)   molar mass  =  3 Fe + 4 O =  (3 x 55.84)  +  (4 x…

Q: Calculate the molar mass of C3H4 in g/mol

A: Molar mass can be calculated by adding the molar masses of all atoms that are present in the…

Q: Find the percentage by mass of oxygen (O) in N2O4 if it is 30.4% nitrogen (N) by mass.

A: We have given that Percent by mass of nitrogen in N2O4 = 30.4% Mass of N2O4 = 92.011 g/mole Percent…

Q: 7. An alloy of iron and carbon was treated with sulfuric acid, in which only iron reacts: 2Fe(s)…

A: As given if only Fe react with sulfuric acid, you can find the no of moles of iron and then mass of…

Q: Please help with 4c, 4d, and 4e. We havent learned kaw of equivalents so please do 4c a different…

A: Given information:Mass percent of bromine in the compound = 51.83 %

Q: Calculate the no. Of moles of 4.80g Al = 0.18 mol 2. Calculate the no of atoms of 3.5 mol H, = 4.2 x…

A: To solve this problem we will use the following Formula  Number of moles = mass / Molar mass     1…

Q: A compound's molar mass is 240 g/mol. Its percentage composition is 75.00% carbon, 5.05% hydrogen,…

A: We have given that  A compound molar mass is 240g/mole its percentage composition is 75.00% Carbon…

Q: Siven the unbalanced chemical equation, C5H12(1) + O2(g) → CO(g) + H20(1), which one of the pllowing…

A: The reaction given is, => C5H12 (l) + O2 (g) -------> CO (g) + H2O (l)

Q: A 4.200 g sample containing impure CuCl2- 2 H20 was heated to constant mass. The sample mass after…

A: Mass of impure hydrated sample = 4.200 g  Mass of sample after heating = 3.362 g   We need to find…

Q: Suppose a student starts with 2.4464 g of a sand mixture and separates the components into 1.3012 g…

A: According to the question, we had a sand mixture consisting of NaClNaCl, CaCO3CaCOX3, and SiO2SiOX2.…

Q: (8) Per chloric acid (0.200m)(0.125 L) Magnesium carbonate -7 Magnesium chlurate + CO,+ HaO 35.0g…

A: Given: Molarity of perchloric acid=0.200 M Volume of perchloric acid=0.125 L Mass of magnesium…

Q: For many years, the extraction of gold - that is, the separation of gold from other materials -…

A: Given,

Q: 4 S(s) +6 O2(g)→ 4 SO3(g) AH°xn = ? %3D Given: SO2(g) → S(s) + O2(g) ΔΗ rxn +296.8 kJ AH°ryn =…

A:

Q: Methane and ethane are the two simplest hydrocarbons.What is the mass % C in a mixture that is 40.0%…

A: Hydrocarbons are defined as the organic chemical compounds that contain only carbon and hydrogen…

Q: 49. Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction…

A: The balance chemical reaction :  2K[Ag(CN)2](aq) + Zn(s) ---> 2Ag(s) + Zn(CN)2(aq) + 2KCN(aq)…

Q: Q1) A sample of limestone (containing calcium carbonate, CaCo,) weighing 438 mg is treated with…

A: Molar mass of CaCO3 = 40 + 12 + 3(16) = 100 g Molar mass of CaC2O4 = 40 + 2(12) + 4(16) = 128 g…