Lab Questions 1. Calculate the mass percentage of water in the hydrate. Show the calculations.   2. Knowing that magnesium sulfate is heptahydrate, what is the % error on the mass percentage of water? Show all calculations.   3. Which experimental steps can a student perform to be sure that all the water has been removed from the hydrate?

Q: Hg,Cl2 Express your answer as an empirical formula.

A: The compounds given are Hg2Cl2 and C2H4O2. The empirical formula of any compound is the formula that…

Q: Part A A compound of X and Y is X by mass. The atomic mass of element X is the atomic mass of…

A: To determine the empirical formula , we need to determine mole ratio between X and Y. For this we…

Q: 4. Write the beta decay of Rn-222. 5. Write the alpha decay of Np-237.

A: We have to write the equations for  beta decay of Rn-222 alpha decay of Np-237

Q: Question 12 of 15 A mixture contains (0.40 g SO,, 20 % (Wt/WT) NACI) and unknown amount of NH,C when…

A: Here a mixture contains 0.4 g SiO2 and 20% (w/w) NaCl and unknown amount of NH4Cl . On heating mass…

Q: Calculate the percentage composition for CC1 . Mass percentage of carbon = %3D Mass percentage of…

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Q: What are three errors that could cause one of your mass percentages to be too high?

A: Mass percent or weight percent of a solution is the mass of the solute by the mass of the solution…

Q: made-up compound: J2(QZ3)2 Determine the number of molecules of J₂(QZ3)2 in 7.2 grams of J₂(QZ3)2…

A: Given -> Weight of J2(QZ3)2 = 7.2 gram  Atomic mass of J = 19.00 g/mole Atomic mass of Q = 35.00…

Q: 2) a) Write formulas for the figures. Dark circles represent element A and light circles represent…

A: Atomic element : Atomic element have single atoms as their basic unit. Molecular element : The…

Q: a. How many grams of C are present in 2.70 grams of carbon tetrafluoride? Mass= gC b. How many grams…

A: Given,a. mass of carbon tetrafluoride  = 2.70 gb. mass of F = 4.96 g

Q: A compound contained 4.6g Na, 2.8g N, 9.6g O. Find the empirical formula. (RAM data Na = 22.99, N =…

A: In empirical formula problem first we determine mole ratio of given atom

Q: How many formula units of calcium bromide are present in a sample containing 7.9 g of bromide ion?…

A: Mass of bromide ion, Br- = 7.9 g Formula unit of calcium bromide, CaBr2 = ?…

Q: Your Question :Your Question :Your Question :Your Question :Your Question :help  please answer in…

A: 1.02 L / 0.566mol = 19.4 L / n2n2=19.4/1.02*0.566 moln2=10.765 mol Kthe question is how much…

Q: What are the molecular and empirical chemical formulas of a compound made up of these molecules? H H…

A: The chemical formula that represents the number of atoms of all the elements present in the molecule…

Q: The reaction of sulfur powder (S8) with oxygen gas (O2) results in the formation of one of many new…

A: We know that, molar mass of O = 15.999 g/mol molae mass of S = 32.065 g/mol

Q: 1. What is the mass of exactly one mole of HO3Br? Answer to the nearest 0.01 g.   2. What is the…

A: Given, Number of moles of HO3Br = 1 mole      Required,                             1. Mass of…

Q: 5. A 295 g sample of unknown metal is at an initial temperature of 13.00 °C absorbs 75.0 kJ. The…

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

Q: The mass of an average blueberry is 0.75 g and the mass of an automobile is 2.0x10³ kg. Find the…

A: Answer: Given data: Mautomobile=2.0×103kgMblueberry=0.75g

Q: If 7.00 g of iron react with 3.00 g of oxygen, what is the empirical formula of the compound formed?…

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Q: Choose the letter for the correct name of product. (Hint: Sketch product first) a. Ethene b.…

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Q: Show ALL your work.  Remember to follow significant digit rules and show proper format in all…

A: Given,  The number of ions in 7.15 g of RbNO3 is:

Q: Theoretically, should the experimental mass percent water values for everyone who used the same…

A: Answer is yes  If everyone is calculating the percent mass of water in the same hydrate the answers…

Q: Suppose the stockroom made a mistake and gave you a mixture of potassium chlorate and potassium…

A: We are to discuss if mass percent of oxygen is smaller or larger in mixture of potassium chlorate…

Q: What are the molecular and empirical chemical formulas of a compound made up of these molecules? H.…

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Q: QUESTION 4 A 1.50-g sample of Na2SxOs contains 6.68 x 1021 sodium ions. Determine the value of x.…

A: Here we are required to find the value of x Na2SxO6.

Q: 2. Butane has the formula C,H10. Calculate butane's theoretical molecular mass from the periodic…

A: We have to calculate the molar mass of Butane, C4H10 .  We know that,  Atomic mass of carbon atom =…

Q: In mass analyzer ions are separated by mass to charge ratio why?

A: In a mass analyzer, ions are deflected from a straight line path and attracted to the negative side…

Q: 3. A sample of caffeine contains 49.48 g C, 5.19 g H, 16.48 g O, and 28.85 g N by mass. Determine…

A: Given,Mass of C = 49.48 gMass of H = 5.19 gMass of O = 16.48 gMass of N = 28.85 gMoles of C, H, O, N…

Q: A 6.136 gram sample of chromium is heated in the presence of excess bromine. A metal bromide is…

A: The empirical formula represents the simple ratios of present  elements in the compound.

Q: How many grams of sulfur trioxide must be weighed out to get a sample of sulfur trioxide that…

A: 1)       Molar mass of O = 16 g/mol           mass(O)= 15.8g       use:   number of mol of O,   n =…

Q: Question 13 What mass of iron (Fe) can be obtained from 3.80 g iron (III) oxide (2 3) reacting with…

A: Ferric oxide reacts with an excess of carbon monoxide: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)   Molar…

Q: Question 1. Find the total percentage of magnesium in magnesium nitrate crystals, Mg(NO3)2 6H2O.…

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Q: This question will walk you through the process of calculating the number of atoms present in a…

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Q: 4. Potassium permanganate Туре of Atoms Amount of Total each atom amount Mass of each Formula Total…

A: Given :  To find the type of atoms and total molar mass for the following compounds. 1. KMnO4  2.…

Q: 1. State the law of definite proportions (or the law of constant composition). Consult your lecture…

A: Since we only answer one question at a time, we’ll answer the first one. Please resubmit the…

Q: 1. What are the main particles that make up the atom. 2. What is the mass number of an isotope and…

A: An atom is the building block of matter that characterizes a chemical element.

Q: A certain metal hydraxide, M(OH)2. contains 32.8% oxygen by mass. What is the identity of the metal…

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Q: Use the References to access important values if needed for this question. A 12.57 gram sample of…

A: Mass of Chromium = 12.57 g Heated in excess Fluorine  Metal Fluoride formed  = 21.76 g Molar mass of…

Q: Below are 3 student opinions, which student is correct and why?

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Q: Experimentally a chemist determined the molecular weight of the compound aniline to be 94.45 a/mol.…

A: A question based on percentage error in the determination of molecular weight, which is to be…

Q: 20. Answer the question below. Use the rubric in the materials for help if needed. Find the percent…

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Q: s in grams of your favorite regular size candy bar? Tell me its name a worite. ss in grams of…

A: 23rd October 1991 1991   On This Day – October 23 : Mole Day, the unofficial holiday, was…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.