What is the answer to the following problem, reported to the correct number of significant figures? (8.000−7.009) / (10.00∗0.010000) A. 9.910 B. 9.91 C. 9.9 D. 0.9910 E. 0.99   B) Hydrates take the form: compound·nH2O. An unknown hydrate has a molar mass of 537 g/mol.If the anhydrate has a molar mass of 375. g/mol, what is the integer n in the hydrate. A. 5 B. 6 C. 7 D. 8 E. 97.   C) Calculate the change in enthalpy for the following reaction: A + 3B→D ∆Hrxn=? Given: 3A + 12B→6C ∆Hrxn= 60.0 kJ 2B + 2D→4C ∆Hrxn= 60.0 kJ Express your answer in kJ. A. -20.0 kJ B. -10.0 kJ C. 0.0 kJ D. 10.0 kJ E. 20.0 kJ

Q: How many hg of oxygen are in 9.999 pg of cobaltous phosphite nanohydrate? The answer is 4.829 x…

A: Here we have asked how many hg of oxygen are present in 9.999 pg of cobaltous phosphite nanohydrate?…

Q: molecules

A:

Q: Vindow Help 100% Tue Apr 20 14:34 Ayemoba Idowu Emmanuel Q A moodle.ciu.edu.tr CHEM 110 - SPRING…

A: Emperical formula depend % of atoms

Q: Please solve question correctly with correct number of significant figures and the correct absolute…

A:

Q: A solution containing 30.0 g of sodium sulfite reacts with 0.009 L of phosphoric acid. What is the…

A: Mass of sodium sulfite reacts = 30.0 gWe need to calculate, what mass of sodium phosphate produced?

Q: Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O. Show your work.

A:

Q: Calculate the percentage by mass of water in magnesium sulfate heptahydrate, MgSO4•7H2OEnter your…

A: MgSO4.7H2O is also known as Epsom salt and it contains 7 molecules of water as water of…

Q: Richards and Willard determined the molar mass of lithium and collected the following data.…

A: a) To find the mean molar mass of the obtained experiment values by Richard and Williard for…

Q: What is the value of x when 32.2 g of Na2SO4•xH2O are heated leaving 14.2 g of anhydrous Na2SO4?…

A: Use law of mass conservation in the chemical reaction that is total mass of reactant should be equal…

Q: What mass of Ha is produced by the reaction of 131.4 mL of a 0.762-M solution of H3PO, according to…

A: The molarity is a measure of concentration and mathematically expressed as the ratio of no of moles…

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

A: Reaction: 3 NH3 (l) + H3PO4 (aq) → (NH4 )3 PO4 (aq)                      1 mol                   1…

Q: ce the equation below using the smallest set of whole numbers. What is the coefficient of H₂O?…

A: A balanced chemical equation is an equation in which an equal number of atoms of each element are…

Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work.

A: Molar mass of MgSO4•7H2O = 246.47 g/molMolar mass of MgSO4 = 120.366 g/mol.

Q: How many grams of NaBr are needed to prepare 16.8 g of 6.89% (w/w) NaBr solution in water? How many…

A: Given mass ℅ = 6.89℅ mass of NaBr solution = 16.8 g density of water = 0.988 g/ml

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: Teacher's Aixtre 09 7. Mass of dry filter paper + benzoic acid 1315 8. Mass of recovered benzoic…

A: Percent error can be calculated by:

Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work.

A:

Q: Determine the percentage composition by mass of each of the elements ( magnessium, phosphorus and…

A:

Q: Aqueous sulfuric acid (H,SO, reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Yield is an estimate of the number of moles of a product formed in relation to the reactant consumed…

Q: Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O. Show your work

A: Molar mass of CaCl2 = (40+2x35.5) g/mol                                   = 111 g/mol Molar mass…

Q: How many equivalents of Mg*2 are there in 6.00 mol of Mg3(PO4)2? First we have to convert moles into…

A: Initially we have to determine the number of equivalent of Mg2+ in the corresponding phosphate of 1…

Q: Gypsum is the hydrate of calcium sulfate, CaSO4 · 2 H2O.  It is the primary material in sheet rock,…

A: On heating Gypsum it form Plater of paris

Q: Molly Cule weighed 8.61g of her hydrate (which is CaSO4*2H2O). After she did her hydrates lab, she…

A: a) Since the difference between the weight of hydrate and anhydrate should be equal to the weight of…

Q: A fungus that grows on peanuts produces a deadly toxin. When ingested in large amounts, this toxin…

A: ✓There are two types of fungus found in nature (a) Poisonous  (b) Beneficial

Q: Part A The compound MgS0, Epsom salt, is used to soothe sore feet and muscles. How many grams will…

A: Solution to Part A: Molar mass of Epsom salt (MgSO4) = 120.366 g / mol Therefore, mass of Epsom salt…

Q: On analysis of a compound it was found contain 29.1% of sodium, 40.5% sulphur 30.4% oxygen. What is…

A: Data is given and empirical formula is asked. I write a table form, so u understand better.

Q: Now, let us think about iron (Fe). The total mass of BIFs globally is estimated at 5.0×1017 kg,…

A: Given :- Total mass of BlF = 5 × 1017 kg Mass percent of Iron in BlF = 35% Molar mass of Fe = 55.8…

Q: Part B 118 mg C6 H12O6 in 5.01 g H20 Express your answer as a percentage. ? mass % = % Submit…

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

Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work

A: Molar mass of any substance is the mass of one mole of any substance, which is expressed in g/mol.…

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

A:

Q: Calculate the number of CO, molecules in 2.25x10-2 mole of CO2, Express your answer using three…

A:

Q: Compute the molarity of a solution that contains 5.62 g of Na2CO3 in enough water to make 750.0 mL…

A: Given: mass of Na2CO3 =5.62g molar mass of Na2CO3 =105.98g/mol number of moles of Na2CO3(n)=mass of…

Q: Now let's suppose it's your turn to be the professor. You want to write a question for your students…

A: Since we want the unknown to be toluene  Hence the data (pressure, temperature and volume) should be…

Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work.

A: Quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O =? M.W of MgSO4 = 120.366 g/mol (anhydrous) M.W of…

Q: Hydrobromic acid dissolves solid iron according to the following reaction Fe(s) + 2HBr…

A: The answers to both the question are given as:

Q: A student was asked to identify a sample of unknown hydrate. Student was provided with the following…

A: To determine the formula of hydrate , we would calculate the percentage of water of hydration in…

Q: Ammonium phosphate ((NH4)4) PO is an important ingredient in many solid fertilizers. It can be made…

A: The balanced chemical equation for the reaction of phosphoric acid and liquid ammonia is,

Q: Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2•9H2O. Show your work

A: The grams of CaCl2 in 7.5 g of CaCl2•9H2O =? molecular weight of CaCl2 = (40.08 + 2 x 35.45 =…

Q: A student carried out the synthesis of aspirin as described using 3.00 g of salicylic acid and 6.0…

A: The balanced equation of the reaction is given and the mole of salicylic acid and acetic anhydride…

Q: Questions 22 and 23 pertain to the following case: A patient is prescribed lithium carbonate…

A:

Q: Water is formed by burning H2 (g) in the presence of O2 (g):    2H2 (g) + O2 (g) à 2H2O (g) a)    If…

A:

Q: A fungus that grows on peanuts produces a deadly toxin. When ingested in large amounts, this toxin…

A: we need to calculate the mass of fungus

Q: Calculations: (Show Work for 100% credit!) 1. What is the "i" value for the solute, C,H2,011…

A: 1. i value of sugar is 1.0 Because sugar molecule is not an electrolyte , so  when it dissolves in…

Q: PERIOD Surface area 7. 257.095 Avogadro's Number 1. 5. 258.1 2. 259.101 How many atoms are in 2.63…

A:

Q: Determine the quantity (g) of pure MgSO4 in 2.4 g of MgSO4•7H2O. Show your work please.

A: Given, mass of MgSO4.7H2O = 2.4 g molar mass of  MgSO4.7H2O = 246.48 g/mol => moles of MgSO4.7H2O…

Q: Consider a random mixture containing 7.00x106 particles of Na2CO3 and 5.00x107 particles of K2CO3.…

A: Given: The number of particles of Na2CO3 in the mixture = 7.00 × 106 particles. And the number of…

Q: Refer to the melting point data in table E5.4 below to answer question. In a recrystallization of a…

A: Melting point is the temperature at which substance change its state from solid to liquid. At the…

Q: An unknown organic compound containing 3 COOH groups has a molar mass of 110.01 g/moles. What is the…

A:

Q: Hot perchloric acid is a powerful (and potentially explosive) reagent used to decompose organic…

A: Perchloric acid is a stronger acid than sulfuric acid and nitric acid. It is a powerful oxidising…

Q: 50.05 7. Percent water (Show caleulations.) 4468 Hgo/iDoɔ= 50.8%0 Hgo 8708hydrate moles 0247503 8.…

A: Dehydration: “De” means removal and the “hydration” means water. the process of removal of water…

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.