(a) Write “true” or “false” for each statement. (a) A mole ofhorses contain a mole of horse legs. (b) A mole of water has amass of 18.0 g. (c) The mass of 1 molecule of water is 18.0 g.(d) A mole of NaCl(s) contains 2 moles of ions.

Q: A sample weighing 3.137 g is a mixture of Fe₂O3 (molar mass = 159.69 g/mol) and Al₂O3 (molar mass =…

A:

Q: Determine the percentage by mass of each element in the following compounds. (Round your answers to…

A: We know that   To find the percentage by mass of each element in the given compounds we have to use…

Q: Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 9.00 moles of aluminum…

A: Given that the mole of aluminium sulfate Al2(SO4)3 = 9.00 mol Now, from stoichiometry of aluminium…

Q: empirical formula of bismuth chloride?

A: (a)   Given:          Mass of Bi (Bismuth)=0.687g          Mass of Bismuth chloride=1.032g

Q: 10. Make the following conversions: (a) 28.4 g S to moles S (b) 2.50 kg Nacl to moles Nacl (c) 42.2…

A: Number of moles = mass ÷ molar mass

Q: anesthetic used to treat a range of conditions such as sunburn, bites, stings and a range of rashes.…

A: Molecular form of Benzocaine is C9H11NO2  Avogadro’s number 1 mole = 6.022×1023 particles

Q: (a) Calculate the number of moles of C and H present in the compound. (b) Find the mass percentages…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Determine the percentage by mass of each element in the following compounds. (Round your answers to…

A: The mass percentage of an element in a particular compound can be found by dividing the atomic mass…

Q: Seawater is approximately 4.0% by mass dissolved ions, 85% of which are from NaCl. (a) Find the mass…

A: Solution- (a).The mass of ions is 4.0 % and 100% of ions contain 85% NaCl. So, the mass % of NaCl is…

Q: The cullinan diamond was the largest natural diamond ever found (january 25 , 1905 25, 1905). It…

A: Use formulas Mole=mass÷molar mass Total atoms=mole×6×1023 MOLAR mass of diamond= 12g/mol

Q: 5) 0.7971 g of molecule, X, is found to contain 3.0 x 1022 atoms. Deduce the identity of X. Given N…

A: Given: Mass of X2 = 0.7971 g Atoms of X2 = 3.0×1022 NA = 6.023×1023 mol-1

Q: A compound consists of 20.3 grams of Carbon, 5.12 grams of Hydrogen, and 7.9 grams of Nitrogen. (a)…

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Q: Give the empirical formula of each of the following compounds if a sample contains the following…

A: The emperical formula can be calculated as follows

Q: 12 (a) Calculate the # of moles of the alement present in 99.9 g of nickel (b) Calcolate the mass in…

A: Given a) Mass of Ni             = 99.9 g b) No.of moles of Ni = 0.251 mol c) No.of moles of Ni  =…

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: How many formula units are in 170.6 g of the following substances? (a) Br₂: (b) MgCl₂: (c) H₂O: (d)…

A: We simply convert the mass to moles, and from moles to formula units. We use Avogadro's number to…

Q: a) Copper(II) fluoride contains 37.42% F by mass. Calculate the mass of fluorine (in g) contained in…

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Q: Seawater is approximately 4.0% by mass dissolved ions, 85% of which are from NaCl. (a) Find the mass…

A: The concentration of seawater is 4% by mass. This implies that 4g of solute is present in 100 g of…

Q: A sample of a substance with the empirical formula XCI3 weighs 0.4884 g. When it is dissolved in…

A:

Q: 9. Which of the following has the greatest number of particles? (A) 9.012 g of Be (B) 1 mole of Na…

A: The no of moles is the ratio of given mass to that of molar mass of that substance.  For more than…

Q: Is each of the following statements true or false? Correctany that are false:(a) A mole of one…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: The salinityof a solution is defined as the grams of totalsalts per kilogram of solution. An…

A: As per the question, Mass of = 35 g Let mass of NaCl = x g Then, mass of =(35-x) g  Let the number…

Q: 1.08 g Epsomsalt (or hydrated magnesium sulfate)is heated,and 0.57g of dried Epsom…

A: Given: 1.08 g Epsomsalt (or hydrated magnesium sulfate)is heated and 0.57g of dried Epsom…

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: 1. A solution containing 18.6 g of chromium(II) chloride is reacted with a 15.0-g piece of zinc to…

A: Given, Mass of chromium (III) chloride (CrCl3) = 18.6 g mass of Zinc (Zn) = 15.0 g Note:  molar mass…

Q: A substance is 10% carbon by mass. If the total mass of substance is 25 grams, (a) what is the mass…

A: It is based on the concentration terms. Here we are required to find the mass of carbon present in…

Q: This organic compound consists of 54.4% carbon, C and 9.1% hydrogen, H, while the remaining percent…

A:

Q: Calculate the number of molecules present in each of the following samples.(a) 0.800 mol acetylene,…

A:

Q: 1. a) Calculate the molar mass of each of the following: (i) N,O, (ii) C,H,OH (iii) MgSO,.7H,O (iv)…

A: Molar mass is determined by the addition of atomic masses of each atom present in a molecule.

Q: The Earth’s ozone layer is under attack in part by chlorine released when ultraviolet radiation…

A: Mass percentage is calculated using the following formula: Mass percentage of an element  = (molar…

Q: A) How many grams of Mgl, is present in a 0.4745 g sample that is 53.21% Mgl2 (278.11 g/mol)? B)…

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Q: f 37.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?…

A: On strong heating, water molecules get removed and turn hydrated salt into anhydrous salt.The…

Q: Calculate each of the following quantities. (a) mass in kilograms of 4.8  1020 molecules of NO2…

A:

Q: 2) a) Describe how the presenceof Bromine, Nitrogen and suljhur in an organic compound can be…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: (b) Find the mass of barium sulphate (BaSO4) from the data given in the table.…

A: Dear student I cam solve only max three parts of the question as per bartleby guidelines. Please…

Q: compound has the following chemical formula: ds for a whole number. s also show that a certain…

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Q: Bimethylhydrazine, the fuel used in the Apollo lunar descent module, has a molar mass of 60.10…

A: Dimethyl hydrazine used as fuel has a molar mass of 60.10 g mol-1.  It is made of carbon, hydrogen…

Q: Nitroglycerin (C3H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C3H3N309…

A: a)  Given,

Q: Determine the percentage by mass of each element in the following compounds. (Round your answers to…

A: Percentage by mass  = (Mass of element in 1 mole of compound/molar mass of the compound) × 100%…

Q: 5. Chemists have determined that 18.0 g of water consists of 6.02x1023 molecules. Assuming that a…

A:

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.