An 8.65-g sample of an unknown group 2A metal hydroxide is dissolved in 85.0 mL of water. An acid-base indicator is added and the resulting solution is titrated with 2.50 M HCl(aq) solution. The indicator changes color, signaling that the equivalence point has been reached after 56.9 mL of the hydrochloric acid solution has been added.

Q: Acetylene (C₂H₂) gas is often used in welding torches because of the very high heat produced when it…

A: Answer: This question is based on the stoichiometry of combustion reaction of acetylene where it is…

Q: A sample of an unknown hydrated compound weighed 16.450 grams. After heating, it had a mass of…

A: We have to calculate the percentage of water by mass in the unknown hydrated compound that weighed…

Q: What is the maximum mass of pure titanium that could be extracted from 80.0 g of ilmenite , a…

A: The objective of this question is to calculate the maximum mass of pure titanium that can be…

Q: If 41.2 g of molten iron(II) oxide reacts with of 20.0 g of magnesium, what is the mass of iron…

A: Given, mass of FeO = 41.2 g Mass of Mg = 20.0 g  Molar mass of FeO = 71.84 g/mol Molar mass of Fe =…

Q: Ammonium perchlorate  NH4ClO4  is a powerful solid rocket fuel, used in the Space Shuttle boosters.…

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Q: Gaseous butane (CH;(CH,),CH;) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide…

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Q: An unknown amount of acetylene gas occupies 12.40 mL. When the amount of this gas is changed to 0.57…

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Q: Aluminum metal reacts with iron (II) sulfate to produce aluminum sulfate and iron metal. How many…

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Q: As a birthday balloon is filled with helium, the amount of helium increases from 1.5 moles of helium…

A: To determine the final volume of a birthday balloon as it's filled with helium, we can apply…

Q: Calculate the number of oxygen molecules required to produce 16.1 g KHCO3. Express your answer in…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: What is the maximum mass of pure iron that could be extracted from 80.0g  of hematite, a iron ore…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: 1. Molecule A below is a protected amino acid. Identify the correct amino acid.

A: The right answer is Alanine.

Q: A sample of a mixture of oxalic acid, H2C2O4, and sodium chloride, NaCl, has a mass of 4.554 g. If a…

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Q: Calculate the mass of water produced when 4.24 g of butane reacts with excess oxygen. Express your…

A: 2C4H10 + 13O2 -----> 8 CO2  + 10 H2OMass of water = (Mass of butane x 5 x Molar mass of…

Q: Ammonium phosphate (NH4),PO4) PO, is an important ingredient in many solid fertilizers. It can be…

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: A major component of gasoline is octane (C,H2). When liquid octane is burned in air it reacts with…

A: Octane is Burn in presence of oxygen.

Q: Aluminium chloride is an inexpensive reagent used in many industrial processes. It is made by…

A: Here we are required to find the mass of aluminum chloride formed when aluminum and chlorine gas…

Q: This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar):…

A: Given, Chemical formula for acetic acid CH3COOH Moles of carbon = 30.3 mol

Q: Wine goes bad soon after opening because the ethanol (CH,CH,OH) dissolved in it reacts with oxygen…

A: Given that, Moles of oxygen = 0.060 mol  Moles of acetic acid= ?

Q: A chemist measures the amount of nitrogen gas produced during an experiment. He finds that 6.6 g of…

A: Given,  Mass of nitrogen gas produced during an experiment is 6.6 g.  The number of moles of…

Q: A compound contains iron and bromine. A sample of the compound contains 6.371 g of iron and 10.991 g…

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Q: Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid…

A: Given,when liquid water ( H2O ) reacts with carbon dioxide ( CO2 ) gas to form aqueous glucose (…

Q: Using the equation below,  convert 17.19 grams of water to moles of H2SO4.  Please round your answer…

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Q: What is the molarity of a solution if 2.03 g of a soluble salt is dissolved in enough water to make…

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Q: If 1.4555 g of phenyl bromide are involved in the Grignard reaction, how many millimoles of phenyl…

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Q: How many grams are in 7.22 mol of HF? Express your answer to three significant figures.

A: We would use molar mass of HF to calculate mass in grams in given moles of HF.

Q: Gaseous ethane (CH,CH,) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (Co,)…

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Q: How many moles of NaOH are in 13.39 mL of 1.38 M NaOH? Do NOT place the answer in scientific…

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Q: What would you multiply "grams of zinc " by to get the units "moles of zinc "? 65.4 grams Zn grams…

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Q: A chemist measures the amount of hydrogen gas produced during an experiment. She finds that 90.8 g…

A: Given :- mass of H2 gas = 90.8 g  To be calculated :- no. of moles of H2

Q: If the mass sample of water was 5.39g and the molar mass of water is 18.02 g/mol, what is the amount…

A:

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.