A student obtained the data below after performing a similar experiment described in this laboratory. 1. Mass of crucible and cover = 19.8 g 2. Mass of crucible, cover and hydrate = 23.0 g 3. Mass of crucible, cover and anhydrous salt after heating = 21.5 g Calculate the percentage of water lost by the hydrate 46.9% 90.0% 45.5% 39.3%

Q: b. silver nitrate and ammonium selenate + c. copper(II) sulfate and barium nitrate + d. calcium…

A: Answer is given below

Q: Identify .It is the technique of separation and identification of chemical substances by a moving…

A:

Q: Determine the molarity of a solution formed by dissolving 97.7 g LiBr in enough water to yield 750.0…

A:

Q: A model for the compound 2-propanol is shown. ball & stick. + labels Write a balanced chemical…

A: In a balanced chemical equation the number of atoms of each element must be equal, on both sides of…

Q: 1A H2A 3A 4A SA BCNO Na Mg 38 48 58 68 7888 18 28 Al Si P Ge As 8A At Rn (1) What is the name of the…

A: Here we are required to name of element which has the following valence electronic configuration.

Q: A 0.8970 g sample of a mixture of NaCl and KC1 is dissolved in water, and the solution is then…

A:

Q: The thermite reaction, Fe2O3 + Al → Al2O3 + Fe produces so much heat that the Fe product melts. a.…

A: a) Given :-  The given thermite reaction is Fe2O3 + Al → Al2O3 + Fe…

Q: An unknown mass of Na3PO4(s) is dissolved in water to form 50.00 mL of solution. This is Solution A.…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: A sample of a 20.0 % solution of KCI in water has a mass of 400. g. What mass of KCI is contained in…

A: A solution is made up of two components solute and solvent. A solute is present to a lesser extent…

Q: Barium metel was quantitatively precipitaded from 1.52g sample of BaCl2+2H2O. The mass of the barium…

A: Mass percentage = (mass of solute / mass of solution) x 100%

Q: 9. You may have noticed that water sometimes drips from the exhaust of a car as it is running. Is…

A:

Q: at mass a

A:

Q: Substances that readily give up hydrogen atoms are called bases. water. acids. neutral substances.

A: Acids and bases are the chemical compounds which when reacted with each other give salt and water.…

Q: How much water must be added to 100.0 mL of 0.450 M HCl to obtain a 0.175 M solution of HCl?

A: First we would calculate the total volume of 0.175 M solution that can be made using the 100.0 mL…

Q: An unknown is soluble in water. Its water solution is neutral. When a small piece of solid is heated…

A: SiO2 is insoluble in water. So 1st option wrong NaCl dissolved in water and forms salt solution. It…

Q: 22. Enter your answer with both the correct number of significant figures and the correct units.…

A:

Q: An aqueous solution of hydrochloric acid contains 24% HCl by mass. Compute for the number of moles…

A:

Q: Barium metal was quantitatively precipitated from a 1.52 g sample of BaCl2-2H2O. The mass of the…

A: Given: Mass of the sample BaCl2.2H2O =1.52g Mass of Barium collected = 0.844g

Q: 1. ferric oxide(s) + nitric acid (ag) products 2. lead (II) chromate(s) + sodium acetate (ag)…

A:

Q: 45. Complete the table. Mass Solute 15.5 g 22.8 g Mass Solvent 238.1 g 183.3 g 215 Mass Solution…

A:

Q: 1. A sample of ultrapure silicon was reacted with excess oxidizing yielding SiO₂. After proper…

A: Given : Weight of SiO2 precipitate = 3.1754 g Purity of ultrapure silicon = 99.98%

Q: Calculate the molarity of each of these solutions. a. A 4.623-g sample of NaHCO3 is dissolved in…

A: Molarity: It is defined as the number of moles of a solute added to 1 litre of the solution.…

Q: An acid, HEI, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A:

Q: Pure iron metal can be obtained by processing a common iron ore that contains only iron and oxygen…

A: The empirical formula indicates the least possible ratio of the amount of constituent elements…

Q: Calculate the composition of the following solution in mass/mass %: 1.00 g KCI per 2.00 × 10² g…

A: Answer: Formula to calculate mass/mass % of solute is shown below: (Mass/Mass)%=mass of solutemass…

Q: The drawing below shows a mixture of molecules: key carbon hydrogen nitrogen sulfur охудen chlorine…

A: We can solve the problem by considering the balanced chemical equation for the reaction - 3 H2 + N2…

Q: Suppose that a device is using a 10.0-mg sample of silicon that is doped with 1 x 10-5% (by mass)…

A:

Q: 2. Determine the concentration of a diluted solution of sodium chloride that was prepared by…

A:

Q: 158.56 g sample of sucrose (C12H22O11) is dissolved in 0.89 L of water.47.5 mL of the original…

A: The molar mass of a compound is calculated by adding up the atomic masses of each element in the…

Q: A sample of pure acetyl salicylic acid had a mass of 0.268 grams. It was dissolved in NaOH and…

A: Concentration of aspirin is expressed in term of molarity. Molarity is the number of moles of solute…

Q: A 500 mg sample contains FeCl3 & MgCl2. Ammonia was added to the sample to precipitate the…

A: The chemical reactionFeCl 3 + 3 NH 3 + 3H2O -----> Fe(OH)3(s) + 4  ................(1)MgCl 2 + 2…

Q: 5. The moles of hydrated magnesium sulphate MgSO4.7H2Q sample was determined as 0.10 mol, Petermine…

A: Given: Moles of the given sample of MgSO4.7H2O = 0.10 molWe have to find out the number of water…

Q: 1. All of the substances listed here are fertilizers that contribute nitrogen to the soil. Which of…

A: The rich in Nitrogen source will be for Ammonia (NH3) with percentage 82.35%

Q: Calculate the empirical formula of the following substances given the mass percentage. a) Ca 20% Br…

A: We know the empirical formula of a compound represents the simplest whole number ratio of atoms of…

Q: 1. Add 3.10 mL of deionized water, 3.04 mL of 2.0 M HCl, and 4.07 mL of 139 g/L Methyl Orange into…

A: We have find out the answer.

Q: A patient's serum magnesium level is reported by the lab as: 1.6 mMol/L. Convert this value to…

A:

Q: What is the total amount of charge needed in order to complete the process? 4.041 x 104 C   8.083…

A: Given;

Q: Which of the following solute(s) would form an electrolytic solution in water? Explain your…

A: An electrolytic solution is a solution that conducts electricity due to the presence of ions that…

Q: Predict the heat of displacement if iron powder and zinc powder is replaced by magnesium powder.…

A: Heat is released when a more reactive metal displaces a less reactive metal from its salt solution.…

Q: In a solution, there is 1 g of NaCl for every 5 g of water. What is the ratio of sodium to water?

A: Ratio of sodium to water is the amount of sodium divided by amount of water .

Q: In the standardization of NaOH solution, 0.5211 g potassium hydrogen phthalate (204.22 g/mol) is…

A: Given: Mass of potassium hydrogen phthalate present = 0.5211 g The molar mass of potassium hydrogen…

Q: 23. Which of the following statements is false about baking soda? a. Baking soda chemically yields…

A: a. Baking soda chemically yields carbon dioxide in the presence of moisture and alkali.False…

Q: let’s say that you react an unknown substance with an acid and produce a gas.  How would you be able…

A: Given: An unknown substance reacts with an acid and produce a gas. To find: identity of gas and test…

Q: Distilled water should have little to no ions in solution. Research on this question and propose…

A: Water that has undergone the purification process through distillation, which entails boiling it and…

Q: MnSO4-4H20 in the mixture? O 11.2% O 65.3% C 69.6% O 34.7% O 88.8% O None of the above

A:

Q: A 50.0 mL sample of X molar HC1 solution is diluted with water to make 350. ml of 0.0152 M HC1…

A: M1V1 = M2V2  M1 = initial molar concentration  V1 = initial volume  M2 = final molar concentration…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".