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

Q: A college chemistry student is performing this reaction in a lab, where magnesium is burned and…

A: When a reaction occurs,  reaction occurs in stoichiometry amounts.  Product is formed with respect…

Q: A container has 5.30 x 1023 molecules (aka atoms) of bromine gas. Calculate the mass (in g) of…

A: A container has 5.30 x 1023 molecules (aka atoms) of bromine gas. We have to calculate the mass (in…

Q: Hydrazine, N2H4, can be used as fuel to orient and maneuver spacecraft. The energy used to do so is…

A: (A) Writing down the balanced chemical equation: N2O4(l) + 2 N2H4(aq) ----> 3 N2(g) + 4 H2O(l)…

Q: Seawater contains 2.80 x 10-8% (by mass) of carbon. How many grams of carbon are there in 3.52 L of…

A: We have to calculate the mass of carbon.

Q: 5 B. A student writes the following incorrect chemical equation for a single replacement reaction…

A: Hi, since you have posted multiple questions, we will answer the very first question for you. Kindly…

Q: What is the number of Carbon atoms in this chemical formula?   C_{11}H_{24}

A: The chemical formula is used to represent a compound. The given chemical formula of the compound is…

Q: Consider this chemical reaction: 2 MnI2(s) + 13 F2(g) 2 MNF3(s) + 4 IFs(1) If 83.5 kilograms of…

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Q: We have 425 cm3 of a material. How many g is it? The material has density of 0.345 g/cm O 68.0 g O…

A: We have to find mass ,volume and density  is given in the question  Volume of the material = 425 cm3…

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: 2NaCl + 1 Br2 → 2 NaBr + 1 Cl2     How many moles of NaCl are there in 99 grams of NaCl?  If you…

A: a) Given, Given mass of NaCl = 99 grams b) Given, Amount of NaCl is 31 grams c) Given, Amount of…

Q: 3. Law of Conservation of Mass. (a) In a combustion reaction, 46.0 g of ethanol reacts with 96.00 g…

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Q: how many grams of aluminum are required to produce 17.5 grams of hydrogen?

A: Given :- 6 NaOH + 2Al --> 2Na3 ALO3+3H2                 mass of H2 = 17.5 g   To be calculated :-…

Q: Part B. 4. Volume of a Drop of Water Number of drops (10) 10 Mass of flask + watchgiass + 10 drops…

A: A numerical problem based on dimensional analysis, which is to be accomplished.

Q: chemical formula

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Q: From a reaction that decomposes water to produce hydrogen and oxygen gas, 10.0 g of hydrogen and…

A: Introduction: According to law of conservation of mass; In all physical and chemical changes ,there…

Q: 6 NaOH + 2AL --> Na3 ALO3+3H2 how many grams of aluminum are required to produce 17.5 grams of…

A: Given that  6 NaOH + 2Al --> Na3AlO3 + 3H2 Molar mass of H2 = 2.016 gram Given mass of H2 = 17.5…

Q: A student is running an experiment in which 48.1 grams of MgBr2 is needed, but the only jar of…

A: Given Mass of MgBr2 needed = 48.1 g

Q: 1) Which of the following are chemical changes? (Circle all that apply) a. Metabolism of Glucose…

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Q: what is the mass of the anhydrous compund?

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Q: Coal is a leading source of energy for the world. While coal is primarily composed of carbon and…

A: Given:S(s)+O2(g)→SO2(g)

Q: Which of the following is equal to exactly 1 mole of atoms?     6.00 grams of carbon     31.93…

A: According to the mole concept , a mole is a measurement unit of any Substance in which particular…

Q: Is the volume of H2 produced larger than the volume of O2 producedbecause (a) hydrogen atoms are…

A: Given: The volume of H2 produced is larger than the volume of O2

Q: What is the percent by mass of hydrogen in Ca(OH)2? Group of answer choices 2.72 % 1.36% 21.6 %…

A: % by mass basically tells about the concentration of one element present in the mixture. The formula…

Q: A piece of aluminum foil measuring 11.20 cm × 6.00 cm × 0.566 mmis dissolved in excess HCl(aq). What…

A: Given, Aluminium foil measuring = 11.20 cm × 6.00 cm × 0.566 mm Density for Al = 2.70 g/cm3   Volume…

Q: 6 NaOH + 2AL --> Na3 ALO3+3H2 what volume of hydrogen gas can be prepared from 5.40 grams of…

A: Given that : Mass of aluminum = 5.40 g The molar mass of Aluminum is 26.98 g/mol. The given balanced…

Q: An allotrope of elemental sulfur is the cyclic molecule S6 . Calculate the number of molecules and…

A: The number of molecules and moles are related to each other by the given relationship as; 1 mole =…

Q: What mass of ZnCO3 contains 3.11x1022 O atoms?

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Q: 2Na + Cl2 → 2NaCl. If I want to make 100.0 g of salt, how much elemental chlorine would I need?

A: First convert mass into molar mass  Then use mole-mole relationship  After getting mole of  Cl2 then…

Q: Consider the following reaction N2 (g) + 3H2 (g) ? 2NH3 g If 1.10 x 10 g N2 is reacted with 500 x 10…

A: The given reaction is, N2 (g) + 3H2 (g) →2NH3 (g) Given that: mass of N2 = 1.10×103 g mass of H2 =…

Q: 38. How many grams of hydrogen are there in 2.5 g of water? b. 0.28 g a 3.5 g c. 0. 95 g d. 2.22 g

A: Given data  Given mass of water=2.5g Grams of hydrogen=??

Q: 10.6 g of anhydrous sodium carbonate combines with 18g of water to form hydrated sodium carbonate…

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Q: Draw the products of each reaction.

A: The sodium ethoxide (NaOEt) is an base which will abstract the most acidic proton and generates a…

Q: What is the total number of hydrogen atoms on the right-hand side of this chemical equation? 8…

A: Count number of H atom in right hand side ?

Q: Balance the following equations AND write in words what each equation means. CH4 + 02 CO2 + H20 Na +…

A: Since you have posted multiple questions, and have not specified which question you want us to…

Q: In the reaction 1. the Law of Gravity. CACO3 CaO+ CO2 2. the Law of Conservation of Energy. 100…

A: Here, it is given that the mass of calcium carbonate is 100 grams and the products formed will have…

Q: Using the following equation: Fe:O:(s) + 3H:(g) → 2Fe(s) + 3H:O(1) How many grams of iron,Fe, can be…

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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: If 81.17 grams of aluminum and 72.03 grams of the iron oxide are used, what mass of iron was…

A: Mass of Iron produced depends on limiting reagent.

Q: the mass of Cu (63.35 g/mol) used to create Cu2S was 41.95 grams. what theoretical mass of Cu2S…

A: The balanced reaction of Cu to form CuS is,                       2 Cu + S  ---->  Cu2S Clearly,…

Q: What is the mass of 0.560 moles of chlorine gas?   A. 19.9   B. 63.3   C. 127   D. 39.7…

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Q: How many grams of Mg2+ are present in 3.80 grams of magnesium oxide?

A: The chemical formula of magnesium oxide is MgO.

Q: What mass of oxygen is present in 10.0 grams of potassium nitrate (KNO3)?

A: Mass of KNO3 = 10 g Molar mass of KNO3 = 101.1 g/mol

Q: 4Fe+3O2-> 2Fe2O3  if 44.2 grams of oxygen react with an excess of iron, what mass of Fe2O3 can…

A: No of moles = mass/molar mass Mass = No. of moles * molar mass Molar Mass of o2= 2 * atomic mass of…

Q: Carbon tetrachloride was prepared by reacting 23.6 g of carbon disulfide and 47 g of chlorine gas.…

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Q: A student used a piece of aluminum that had a mass of 2.583 grams, and treated according to the same…

A: Given:Mass of Al= 2.583 gramsChemical equation:2 Al(s) + 2 KOH(aq) + 4 H2SO4(aq) + 22 H2O(l) → 2 KAl…

Q: 12 1. In mammals, lactose (milk sugar) is metabolized to glucose (C6H₁2O6), the key nutrient for…

A: Give the molecular formula of glucose is C6H12O6 The mass percent of each element in glucose is

Q: Ca(OH)2 (aq) + PO43- (aq) → Ca5OH(PO4)3 (s) + OH- (aq) A) What is the mass of calcium (in grams)…

A: Principle of mass conservation states that the mass of a closed system stays conserved during the…

Q: A freighter carrying a cargo of uranium hexafluoride sank in the English Channel in late August…

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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.