How many sulfite ions are contained in 99.6 mg of sodium sulfite?

Q: A strontium hydroxide solution is prepared by dissolving 12.50 g of Sr1OH22 in water to make 50.00…

A: mass of strontium hydroxide (m) = 12.50 g volume of solution (V) = 50.00 ml

Q: If 20.0g of copper(II) chloride reacts with 20.0 grams of sodium phosphate in aqueous solutions…

A: Given reaction 3 CuCl2 (aq) + 2 Na3PO4 (aq)  →  Cu3(PO4)2 (s)   + 6 NaCl(aq.)Mass of CuCl2 = 20.0…

Q: What is the molarity of the new NaOH solution?

A: Initial no. Of moles of NaOH = 6×7 = 42mmoles  New volume, = 400mL  Hence Molarity = no. Of…

Q: What volume (in mL) of a 1.96 M glucose solution contains 0.942 moles of glucose?

A:

Q: Eighteen carat gold typically contains 75% gold, 16% silver, and 9% copper by weight. Express this…

A: The percentage by weight of the different metal in eighteen-carat gold is: percentage of gold is =…

Q: 32. 6.00 g of H₂ is reacted with 10.0 g of O₂ to produce water (H₂O). How many grams of water are…

A: The mass of H2 is 6.00 g.The mass of O2 is 10.0 g.To find the mass of H2O produced.

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Mass of crucible = 26.639 g Mass of crucible + mass of Na2SO4·xH2O = 27.085 g Therefore mass of…

Q: what's the concentration of solution in units of molarity when 79.23 g of sodium bromide is added to…

A:

Q: Consider this question: What is the mass of solute in 200.0 L of a 1.556-M solution of KBr?(a)…

A: a) The number of moles of solute per litre of solution is known as molarity of the solution. It…

Q: How many moles of NaOH are present in 31.5 mL of 0.240 M NaOH?

A:

Q: The density of a NH3 solution is 0.89 g/mL and it is 32,00% by mass NH3. What is the molarity of the…

A: Since % by mass = % m/m  And % m/m = mass of solute X 100 / mass of solution  Assuming we have 100 g…

Q: How many grams of solute are present in 645 mL of 0.200 M KBr?

A:

Q: The molarity of a solution prepared by dissolving 0.425 moles KI in 250. mL of solution:…

A:

Q: What is the molarity of a solution that contains 4.90 moles of a solute in 750.0 mL of solution?

A: Given, Volume of solution = 750 mL = 0.75 L Moles of solute= 4.90 moles

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Since on heating the compound, the mass of water will be lost as it will get vaporised  Hence the…

Q: If 11.5 mL of stock hydrofluoric acid are diluted to 500.0 mL, what is the molar concentration of…

A: A stock solution is a concentrated solution prepared and stored in laboratories, that can be later…

Q: How many moles of NaOH are present in 27.0 mL of 0.110 M NaOH?

A: Molarity is one of the concentration term which is used to define the concentration of a solute in a…

Q: What is the molarity of a solution which contains 85.00 grams of sodium nitrate dissolved in 2.00 L…

A: Mass of sodium nitrate given = 85.00 g The volume of the solution = 2.00 L Molar mass of sodium…

Q: A solution of sucrose and water contains 45.6% by mass sucrose. What mass, in grams, of sucrose is…

A: ℅ sucrose=45.6Total mass of solution=9.6 gmFind out mass of sucrose

Q: If 11.5 mL of stock hydrofluoric acid are diluted to 500.0 mL, what is the molar concentration of…

A: Hydrofluoric acid ( HF ) Initial concentration M1 =28.9 M Initial volume of solution V1 = 11.5…

Q: In beverages, such as Gatorade, the quantity of FD&C Blue 1 is added in a bottle of 946 ml Is 0.100…

A: Given that -  The quantity of FD&C Blue 1 = 0.100 mg/L  Volume of bottle = 946 mL  Molar mass of…

Q: 2. The concentration of NH4CI solution (aqueous solution) is 33.5% by mass. If the mass of solution…

A:

Q: A chemist needs 13.81 mL of 1.458 M NaCl. What volume in mL of 3.767 M NaCl must be diluted in water…

A: Moles before dilution and after dilution ae same as per mole concept.

Q: What is the molarity of a solution prepared by dissolving 153.6 g NaI in enough water to make 425 mL…

A:

Q: Consider 5.6 mg of sucrose dissolved in water. Identify solute and solvent. Sucrose: Solvent: Which…

A: Given is, 5.6 mg of sucrose dissolved in water.

Q: how many milligrams of sodium are contained in 4.50g of NaCl

A: Given, Mass of NaCl = 4.50g

Q: What is the mass percent of ethanol (CH3CH2OH) if 0.0789 moles of ethanol is added to 0.271 kg of…

A: Given :- number of moles of ethanol = 0.0789 mol  Mass of water = 0.271 kg  To calculate :-  Mass…

Q: How many grams of salt are formed after the reaction is complete?

A: We have to calculate how many grams of salt are formed after the reaction is complete?

Q: A 2.44 L bottle of a solution of concentrated HCl was purchased for the general chemistry…

A: Molarity (M) is a measure of the concentration of a solute in a solution, or of any chemical species…

Q: A 2.69 gram sample of a KCl and KClO3 mixture was found to contain 0.01268 mol of KClO3. What is the…

A: It is a problem based on general chemistry. Here we will find the percent of KClO3 in the mixture by…

Q: Assuming you use 2.5 g vanillin and 5.0 mL of a 3.42 M NaBH4 solution, what is the theoretical yield…

A:

Q: A sample of hydrated copper (II) sulphate weighs 124.8 g. The sample has been determined to  contain…

A: In order to find the molecules of water and the molecular formula we first write down the given…

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.