(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: empirical formula of bismuth chloride?

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

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: When 4.060 grams of a hydrocarbon, C,Hy, were burned in a combustion analysis apparatus, 12.74 grams…

A: Given data :

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: 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: Complete the Avogadro's Statement for the element hydrogen: 1 mole of hydrogen hydrogen atoms =…

A: A mole is defined as that amount of the substance which has mass equal to gram atomic mass if the…

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

A:

Q: Assume that the ratio of moles of Cl to moles of Cu are 1.84.  If we can represent the formula by…

A: The ratio of moles of any two substances in a balanced chemical reaction is called molar ratio.…

Q: Samples of illicit “street” drugs often contain an inactivecomponent, such as ascorbic acid (vitamin…

A: A chemical species formed from a certain atom, which cannot be divided into further small particles…

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: 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: Assume that the ratio of moles of Cl to moles of Cu are 2.7.  If we can represent the formula by…

A:

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

A:

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.