Based on the law of conservation of mass, how many grams of hydrogen gas, x, are formed by the reaction? 66.0 g zinc + 72.9 g hydrochloric acid produces 136.3 g zinc chloride +x g hydrogen gas 2.6 g 138.9 g 136.3 g 66.0 g

Q: How many grams of iron, molar mass 55.85 g/mol, will be consumed during the formation of 14.34 grams…

A: Using mole concept easily determines how much moles of  reactant are used and how much moles of…

Q: Considering the chemical equation below 4 NH3 + 5 O2 -4 NO + 6 H20 Suppose a vessel contains 6.45 g…

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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: When magnesium ribbon is burned inside dry ice slabs (carbon dioxide), black specks (carbon) and…

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Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: Given: Atomic mass of Av = 18.25 g/mol. Atomic mass of Bw = 4.32 g/mol. Atomic mass of Cx = 26.82…

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: Lithium carbonate, Li2CO3, contains 18.8 % lithium and is used in the treatment of mental illnesses…

A: Given : mass percent of lithium in Li2CO3 = 18.8 %. And mass of Li2CO3 sample = 1.48 g

Q: Determine the molecular formula if the molar mass of the compound is 957.86 g/mol.

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Q: Directions: Read each item comprehensively and choose the letter of the correct answer. Use a…

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Q: À 7.45 g sample of calcium carbonate completely decomposes into calcium oxide (lime) and carbon…

A: Answer :-  1) only 3  i.e. The original solid is not an element.…

Q: A 12.39 g sample of phosphorus reacts with 42.54 g of chlorine to form only phosphorus trichloride…

A: Given: mass of P = 12.39 g mass of Cl2 = 42.54 g molar mass of P = 30.97 g/mol molar mass of Cl2 =…

Q: What is the mass of one atom of I? O 4.745 x 10-22 g O 3.443 x 10-22 g O 6.641x 10-23 g O 2.107 x…

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Q: The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: 4 NH3 (g) + 7 O2 (g)…

A: 4 molesNH4 NH3 +702 G4NO24 NO + 6H₂OMy gives a proles Nomole NH₃ gines Imole No.17 g NHg gives 46 gm…

Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: We need to find molecular formula for given compound.

Q: Calculate the mass, in grams, of 852 atoms of cadmium, Cd (1 mol of Cd has a mass of 112.41 g).

A: Mole : Mole of any element is ratio of atoms of element to the Avogadro number. If number of moles…

Q: "If you begin with 202.2 grams of aluminum, how many grams of aluminum oxide can be formed? 4 Al(s)…

A: Given, 4 Al(s) + 3 O2(g) → 2 Al2O3(s) mass of aluminium (Al) react = 202.2 g mass of aluminum oxide…

Q: 13 What is the mass of carbon which reacts with 223 g of lead oxide? 2PBO + C 2Pb + CO, 6 g 12 g 24…

A: 1 mole of a substance is equal to its atomic mass or molecular mass expressed in grams. The atomic…

Q: Copper metal reacts with nitric acid. Assume that the reaction is 3Cu(s) + 8HNO3 (aq) → 3Cu(NO3)2…

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Q: 1.Aluminum reacts with oxygen to produce aluminum oxide (Al203). The balanced chemical equation for…

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Q: When a chemical reaction occurs, atoms rearrange to form new compounds, but no new atoms are created…

A: Figure shows A is single element. There are 4 A atoms present in the reactant side. B is diatomic…

Q: A compound has an empirical formula of C 8H 17. If a sample of the compound contains 4.90 grams of…

A: To solve this problem we will first find the number of moles of carbon from the given mass then…

Q: How many grams of O2 will be consumed during the formation of 13.67 grams of Fe2O3? Report your…

A: Mass of Fe2O3 = 13.67 g

Q: A mixture of calcium oxide, Cao, and calcium carbonate, CacO 3, that had a mass of 3.454 g was…

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Q: What is the total number of hydrogen atoms on the right-hand side of this chemical equation? 6…

A: Given 6CO2(g) + 6H2O(l) -----> C6H12O6(s) + 6O2(g)

Q: The halogens are the elements of group 17 on the periodic table. Halogens combine easily with…

A: we are to discuss which type of compound is formed when halogen reacts with group 1 metals.

Q: A sample of gas mixture from a neon sign contains 3.48 x 10-4 mol Ne and 1.12 x 10- mol Kr. What are…

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Q: A certain compound X is composed of 70.53% carbon, 13.02% hydrogen, and the remainder is nitrogen.…

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Q: 27. When iron(III) oxide reacts with hydrochloric acid, iron(III) chloride and water are formed.…

A: Balanced chemical equation:  Fe2O3  + 6 HCl ---> 2 FeCl3 + 3 H2O  Mass of Fe2O3 = 10.0 g Mass of…

Q: 70 ml of 0.3 normali (sulfuric acid) was taken to prepare 60 ml of sulfuric acid solution. What is…

A: Introduction: For the preparation of dilute solution from a stock solution, we can use the following…

Q: Question attached

A: Given: Mass of calcium present in Calcium chloride is 20 g

Q: What is the mass of 4.63 x 1012 atoms of Fe? 9.76 x 10-10 g O 1.62 x 10 10g O 1.08 x 10-10 g O 2.73…

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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: 4. . Which is NOT TRUE about the Law of Conservation of mass? O The number of atoms before and after…

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Q: 45.5 grams of a magnesium reacts with 243.2 grams of oxygen gas. At the end of reaction, 211.2 grams…

A: using mole concept from Balanced chemical equation easily determination of moles of products is…

Q: A mixture of 197.1 g of P and 203.6 g of O, reacts completely to form P.0, and P,010. Find the…

A: Using mole  concept  easily determine how much reactant used and how much product is formed .

Q: A chemical compound containing hypothetical elements Av, Bw, Cx, Dy, Ez has mass percentages of…

A: We have to determine the Molecular formula of a compound having following hypothetical elements.

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

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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: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given  Wt. If iron = 0.210 g  Wt. Of iron oxide = 0.341 g  Atomic weight of iron = 55.85 g/mol…

Q: What does a chemical equation show? A. The reactants and products in a chemical reaction B. The…

A: Solution 7). A chemical reaction always shows reactants and products

Q: A sample of terbium contains 3.01×1025 atoms. What is the total mass of this sample?The molar mass…

A: It is required to calculate the mass of 3.01 x 1025 atoms of terbium and the molar mass is 158.9…

Q: When potassium chromate, K,CrO, is dissolved in water, what ions are produced? no ions are formed K*…

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Q: Al,O3 Br2 (9) AIBT, 3. If you begin the reaction with 5.62 x 1023 molecules of aluminum bromide and…

A: firstly , we will write a balanced chemical equation of above reaction.…

Q: Na + 2 H2O à 2 NaOH + H2 If 50 g of sodium (Na) is placed in water, what mass of hydrogen gas (H2)…

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Q: 1). (NH4);PO4 + Pb(NO3)a > Pb3(POa)a +. _NH,NO3 23.98 grams of lead (IV) nitrate are needed to…

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Q: 9. What is the mass of one-half mole of SO2? а. 8 g с. 24 g b. 12 g d. 32 g 10. How many grams are…

A: We know ; Mole of compound =  Mass of compound/ Molar mass of compound     1 mole of substance has…

Q: 33. The oxidation of phosphine (PH3) to phosphorus pentoxide (P2Os) is given by the chemical…

A: n(moles) = mass÷ molar mass  We have to find the number of moles of O2 reacting completely with PH3…

Q: 4 g of Y reacts completely with oxygen. The following equation (ii) represents the reaction. 4 g Y…

A: From now onwards, please, post the question in English only. We have to predict the mass of product…

Q: 6. How many oxygen atoms are there in 2.5 g of oxygen gas? a. 2.4 x 1022 b. 4.7 x 1022 c. 9.4 x 1022…

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