1. What is the molecular formula for the unknown hydrate? 2. What is the percent mass of water in CaSO4•2H2O? Show your calculations. 3. Not drying the crucible after washing is a bad mistake. For Part B: If the empty crucible is not heated long enough to completely dry it prior to weighing what will be the effect on the calculated percent water in the unknown? (larger or smaller than the actual value). Explain your answer as clearly as possible. 4. Explain the purpose of the desiccator. How would your results differ if you didn’t use it?

Q: How many moles of water H2O, contain 2.0 x 1022 molecules of water?  Express the quantity in moles…

A: Moles = Number of molecules / NA

Q: The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL…

A: Given; density of water at 4.00Co=0.967 g/mL present volume of water we have=499.8 mL moles of water…

Q: How many moles of potassium ions are in 360. g alum?    (b) What is the mass % S in alum (to 3…

A:

Q: 2C2H6 + 7O2 = 4CO2 + 6H2O If we instead had the combustion of propane, C3H8, how many grams of water…

A: Combustion means burning of the substance in presence of air to produce water and carbon dioxide.…

Q: The active ingredient in Tum is calcium carbonate. a). What is the chemical formula of calcium…

A: A.Chemical formula of calcium carbonate is CaCO3. B. Molar mass of calcium carbonate is 100g/mol.…

Q: . What is the percent by mass (percent composition) of each element with then the compound magnesium…

A: 1) What is the percent by mass (percent composition) of each element with then the compound…

Q: Calculate the percentage of water in the following hydrates An unknown hydrate, AC. XH2O has a mass…

A: The mass of unknown hydrate, AC. XH2O is = 1.632 g and the mass of the anhydrous compound, AC =1.008…

Q: The following chemical equation has NOT been balanced.   H3PO4 + Ca(OH)2 --> Ca3(PO4)2 + H2O…

A: Given, mass of H2O = 17.94 g  Molar mass of H2O = 18.01 g/mol  Molar mass of Ca(OH)2 = 74.09 g/mol

Q: How many molecules are contained in a glass that holds 490 g of water? How many moles does that…

A: The mass of one mole of molecules is known as molar mass. We know that the molar mass of water is…

Q: H2SO4(aq) + Pb(C2H302)2(aq) PbSO4(s) + 2 HC2H3O2(aq) Solutions of sulfuric acid and lead (II)…

A: The balanced reaction taking place is given as, => H2SO4 (aq) + Pb(C2H3O2)2 (aq) ------->…

Q: 5. Here is the equation for the reaction between sodium metal and chlorine gas: 2Na + Cl2 2NaCl This…

A: Since you asked question number 5 so, as per Q&A guidelines of portal I solve question 5 for…

Q: Ibuprofen, the anti-inflammatory drug in Advil, has the formula C13H18O2 What is the empirical…

A: Ibuprofen is an anti-inflammatory drug

Q: Anhydrous CuSO4 can be used to remove water (an impurity) from gasoline. When the CuSO4 absorbs the…

A: Reaction corresponding to absorption of water by copper sulfate is: CuSO4+5H2O→CuSO4.5H2O Hence, 1…

Q: Convert 8.04 x 1021 molecules/formula units of X4Z4 into grams of the same compound. (Assume that…

A: Formula unit of a molecule indicates the chemical or molecular formula of the given sustenance.

Q: Given the equation: HCO3 (aq)+ H20O= Co3(aq)+ H30 (aq). Identify the C HCO3 H20 Co3 2 H30*

A: Given , chemical reaction : HCO3- + H2O ---> CO32- + H2O

Q: Convert 1.59 x 1022 molecules/formula units of X5Z4 into grams of the same compound. (Assume that…

A: The given data contains, mass of X5Z4=1.59×1022molecules/formula molar mass =(5×54.94 g/mol)+(4×8.72…

Q: The analysis of a compound gives the following percent composition by mass: C: 56.70 percent; H:…

A: The molecular formula C13H23S1O4 is calculated from percentage composition and molar mass of…

Q: Given: NaBr + Sn(NO3)2 --> NaNO3 + SnBr2 a. When this equation is balanced, what is the sum of the…

A: NaBr + Sn(NO3)2 --> NaNO3 + SnBr2 To get the Balanced chemical equation , we have to add the…

Q: 6. A student reported the following percentages for his unknown mixture: 25% NH4CI, 30% NaCI, and…

A:

Q: What number should be placed in the blank in order for this equation to follow the Law of…

A:

Q: Part B: Percentage of Baking Soda in an Unknown Mixture UNKNOWN # Mass of test tube and beaker…

A: Given that -  Mass of unknown mixture used = 1.40 g  Mass of H2CO3 released = 0.51 g    From the…

Q: what is the number of moles of calcium carbonate reacted?

A:

Q: Don't get how to fill in the table attached below.

A: The number of water molecules present inside a crystal is known as water of crystallization.The…

Q: What is the % by mass of water in your hydrated copper (II) sulphate? Mass of just anhydrous…

A:

Q: The calcium ion is a dietary mineral essential to good nutrition. Calcium is necessary for the…

A:

Q: The following data was obtained in an experiment to determine the water content in sodium alum, [Na…

A:

Q: Calculate the percent composition of sand in the mixture using the mass of the recovered sand…

A: First, the % composition of sand in the given mixture is calculated by dividing the sand weight by…

Q: The chemical formula for octane is: CH; (CH,),CH; 9. Calculate the molar mass of octane. Round your…

A: Octane is saturated hydrocarbon compound which is a component of gasoline i.e pertrol.  It is…

Q: A student has been tasked to determine the percent water in thalium (III) nitrate, Tl(NO3)3 . xH2O.…

A: Thalium (III) Nitrate is a salt having the molecular formula Tl(NO3)3. In normal conditions, it…

Q: c) A methane hydrate has the formulae CH4•XH2O. Methane makes up 15% of the mass of 'methane…

A: (c) Let assume, the mass of methane hydrate (CH4·xH2O) is Y g/mol. The mass of methane (CH4) is 15…

Q: B. TRUE OR FALSE: Read each statement carefully. Write TRUE if the statement is correct and FALSE if…

A: Percentage composition gives a brief ideas about each elemental composition as follows.

Q: What is the percent NaCl in the sample?

A:

Q: A 5.000 g sample that contained NaCl and BaCl2 2H2O was heated. After heating the sample had a…

A: We have to calculate the % NaCl in the sample.

Q: 4. A student has been tasked to determine the percent water in thalium (III) nitrate, TI(NO3)3×H2O.…

A: On heating and consequently allowing the hydrate to stand in open air overnight allows the hydrate…

Q: When the following equations are balanced using the smallest possible integers, what is the number…

A: Balancing the reaction is not very tough.  Here we have to eqalise the things on both side.

Q: the percent of water in a hydrate sample is 38.5 % and the formula of the anhydrous compound was…

A: Given that sample has 38.5 g water.

Q: what mass of anhydrous magnesium sulfate will remain?

A:

Q: Part B: Percentage of Baking Soda in an Unknown Mixture 110 UNKNOWN # Mass of test tube and beaker…

A: Mass of unknown mixture = 1.60 g  Mass of H2CO3 released = 0.51 g    Then from following reaction -…

Q: Percent Composition 1. Calculate % mass of water in: CUSO4•5H20 Mass of Water = Cuso %3D Mass of…

A: Given: A compound CuSO4 x 5H2O Atomic masses of the elements are, H = 1 O = 16 S = 32 Cu = 64

Q: Using the initial mass 1.510 g and the molecular formula of the hydrate CuCl2​⋅2H2​O). Predict the…

A: Mass of compound = 1.510 g Mass of water produced on heating the compound = ?

Q: Why should a pure compound have a definite composition by weight? how is it possible for two samples…

A: We need to explain why a pure compound is expected to have a definite composition.  Definite…

Q: An anhydrous (water removed) salt has a formula mass of 159.265 g/mol. If the hydrated version of…

A: Given, The molar mass of water (H2O) = 18 g/mol. The mass of 5 moles of water (H2O) = 5 x 18 g = 90…

Q: Benzene, C6H6, is an important solvent and intermediate chemical in many chemical reactions. It is…

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: 3) A chemical supply truck breaks down in the desert, and the driver is running out of water. He is…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 1) Glucose has the formula C6H12O6. What is the percent composition of oxygen in glucose to three…

A: 1. Given data:  Glucose  molecular formula = C6H12O6 % composition of oxygen = ? Molar mass of…

Q: A high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters…

A: The number of moles of oxygen (O2) present (nO) in 100.0 g of oxygen gas is calculated using…

Q: how many molecules are in the sample 2.0 g H2O? Express your answer using two significant figures.

A: Number of moles of water can be calculated as follows: No. of moles = MassMolar massNo. of moles =…

Q: Determining the percent water and the formula of a hydrate Mass of crucible 12.73 grams Mass of…

A:

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".