Calculate the number of atoms of hydrogen (H) in 323 cm3 of the colorless gas ethylene at 0 °C and atmospheric pressure, where its density is 1.25×10-3 g cm-3. The molecular formula of ethylene is C2H4.

Q: mixture of O2 (g) and H2 (g) explosively react to form steam H2O (g) in the presence of an electric…

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Q: In 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of…

A: Yes, the Avogadro number is changed and now becomes bigger than previously. Yes, the definition of a…

Q: (a) Calculate the molar mass of ammonium nitrate, NH4NO3. (b) What is the mass percent of nitrogen…

A: (a) Molar mass of a molecule = sum of atomic masses of all the constituent elements      Molar mass…

Q: the mass of 1 gallon of gasoline is about 2.7 kg. Assuming the gasoline is entirely octane, C8H18,…

A: Given The mass of 1 gallon of gasoline is about 2.7 kg or 2700 grams and the gasoline is entirely…

Q: Write a balanced chemical equation for the photosynthesis reaction in which gaseous carbon dioxide…

A: The process by which the plants make their own food with the aid of sunlight is termed as…

Q: The equation for the reaction between sodium hydrogen carbonate and sulfuric acid at room…

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Q: Consider the Harber-Basch process for the synthesis of ammonia from its elements. Calculate the…

A: Interpretation-  To determine the theoretical yield in moles NH3 from the complete reaction of 59.8…

Q: Carborundum (silicon carbide), SiC, is a very hard material used as an abrasive on sandpaper and in…

A: Given thatCarborundum (silicon carbide) is prepared by the reaction of pure sand with carbon at a…

Q: Calculate the mass (in grams) of 8.336 x 10^16 molecules of Ca5(PO4)3(OH) (Hydroxyapatite)

A: We have been given 8.336 x 1016 molecules of hydroxyapatite.and we have been asked to calculate the…

Q: Calculate the number of atoms of carbon (C) in 475 cm3 of the colorless gas butane at 0 °C and…

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Q: A solution of 75 mM tartaric acid (CaH,O6) in water is used as a standard in HPLC analysis. How many…

A: We know that 1 molar solution stands for 1 mole solute is dissolved in 1 litre solution.  Now, we…

Q: Gypsum, CaSO4 · 2 H2O, is used to manufacture cement. What is the mass percent of water in this…

A: Given :-  molecular formula of gypsum =  CaSO4 · 2 H2O  To calculate :-  mass percent of water in…

Q: For each of the equations, determine the change in the number of moles of gas, Angas . (NH,),CO3(s)…

A: A chemical reaction is represented by using a chemical equation. In a chemical equation, the species…

Q: (b) A student knew that calciun hydroxide could be made by adding calcium to water. The student…

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Q: Industrially, hydrogen gas can be prepared by combining propane gas (C3H8) with steam at about 400…

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Q: When sulfuric acid reacts with calcium hydroxide, calcium sulfate and water are produced. The…

A: Given reaction is,  H2SO4 (aq) + Ca(OH)2 (s) -------> CaSO4(s) + 2H2O(l)

Q: The organic molecules shown here are derivatives of benzene in which six-membered rings are…

A: (a)The molecular formula of benzene is C6H6.  So, its empirical formula will be C3H3. The molecular…

Q: Write the balanced equation for the photosynthesis reaction in which gaseous carbon dioxide and…

A: A chemical reaction is symbolic representation of the conversion of substances to new substances. In…

Q: How many oxygen atoms are on the right-hand side of the following chemical equation? Express your…

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Q: A mixture sample containing 80% NaHCO3 and 20%NaCl was marketed for certain food preparations. As an…

A: NaHCO3 decomposes on heating as follows:

Q: How many molecules of ethanol (C2H5OH) (the alcohol in alcoholic beverages) are present in 145 mL of…

A: In order to calculate number of molecules of ethanol, first we have to calculate the number of moles…

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

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Q: 17. Saccharin, an artificial sweetener that is 3000 times sweeter than sucrose, is composed of…

A: 17. Given information,    45.90% carbon, 2.73% hydrogen, 26.23% oxygen 7.65% nitrogen, and 17.49%…

Q: what is the mass(in grams). 5.05니 x023 of Of Carbon diox id e?

A: According to the question,  We need to calculate the mass of 5.054*1023 molecule of carbon dioxide.…

Q: A 5.000 gram sample of MnB4O7·•8H2O is heated to drive off the water. What is the mass of the…

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Q: I only need parts B and D, thank you!   The following quantities are placed in a container: 1.98 ×…

A: Solution - (b) According to the question - Given values are - The moles of atoms of H =…

Q: This

A: According to the question, a 235.2 g sample of ground water is analyzed for calcium. The Ca2+ in the…

Q: a) Using NO2(g) as an example, show with dimensional analysis that the molecular mass and molar mass…

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Q: The organic salt tetrabutylammonium hexafluorophosphate is widely used as a non-aqueous electrolyte…

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Q: How do I calculate the number of molecules in 6.00 ml of acetic anhydride, C4H6O3, if the density of…

A: Given : Volume of acetic anhydride = 6 mL Density of acetic anhydride =1.08 g/cm^3 ( 1 mL = 1 cm^3 )…

Q: In an experiment, 34.8243g of copper (II) nitrate hydrate, Cu(NO3)2•zH2O was heated to a constant…

A: GivenMass of hydrated salt = 34.8243gMass of anhydrous salt = 27.0351gMass of water lost = 7.7892g

Q: e mass, in grams,

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Q: The chemical formula of blue crystalline substance of hydrated penta-aqua copper II sulphate is…

A: Molecular formula: CuSO4.5H2O Chemical formula: CuH10O9S Molar mass of CuSO4.5H2O = 64 + 10 x 1 + 9…

Q: (c) A compound has a mass composition of 49.3% C, 6.9% H and the balance is O. The molecular weight…

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Q: What is the mass percentage of O in C₃H₈O₂? Provide an answer to two decimal places.

A: We have to find the mass % of O in C₃H₈O₂ As,  Atomic mass of C = 12 g mol-1 Atomic mass of H = 1 g…

Q: Arrange the following in order of increasing mass: 1.06 mol SF4; 117 g CH4; 8.7 × 1023 molecules of…

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Q: Silicon tetrachloride (SICI4 ) can be prepared by heating Si in chlorine gas: Si(s) + 2C12(g) ->…

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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.