What is the mass of 3.119 moles of Ca(OH)2? a.  231.1 g b. 462.1 g d. 74.10 g c. 4.209 x 10^-2 g

Q: The use of freons is being phased out because of the damage these compounds do to the stratospheric…

A: a.

Q: How many grams of zinc are there in 22.7 g of ZnCl₂? a. 035 g b. 10.9 g c. 0.17 g d. 1476 g

A: 1 mol of ZnCl2 contains 1 mol of Zn atom is present The molecular weight of ZnCl2  = (65.4 +2 x 35.5…

Q: a. What is the mass of 1.49 x 1024 atoms of chlorine? grams b. What is the mass of 9.12 x 1023…

A: a) mass of 1.49×1024 atoms of chlorine.

Q: sample

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Q: represents tne A 27.29 g 6.41 g 27.29% C 17.09 g 72.71 g O2 72.71% 100% CO2 100.0 g CO2 23.5 g CO, |…

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Q: A sudent needs to use 0.500 mole of sodium carbonate (Na C O) tor an experimment How many grans of…

A: Number of moles = mass/molar mass  So, mass = number of moles × molar mass

Q: 1.The combustion of ammonia in the presence of excets oxygen yields NO, and H20: 4 NH3 (g) + 7 02…

A: 1) Given that : Mass of ammonia = 174 g Mass of oxygen consumed = ?

Q: A 4.450 g sample of hydrated lithium iodide, LiI·xH2O, is dried in an oven. When the anhydrous salt…

A: The water of crystallization is having a fixed number of water molecules present in one formula unit…

Q: What is the average mass (in grams) of a single nitrogen dioxide molecule? A. 3.6 x 10-26 g B. 2.77…

A: Since mass of 1 molecule  = molar mass / Avogadro's number Molar mass of Nitrogen dioxide (NO2) = 14…

Q: 23. a. Calculate the average mass in grams of an individual atom of silver. b. Calculate the mass in…

A: 1 mole Ag atoms = 6.023 × 1023 Ag atoms. mass = mole X molar mass for elements, atomic mass = molar…

Q: A. What is the mass in grams of 1.11 x 10^24 atoms of zinc? B.How many zinc atoms are there in 28.5…

A: We’ll calculate the mass of Zn and the number of atoms present in Zn by applying simple mole concept…

Q: An experiment was performed in lab to produce 10.3 grams of Ca(OH)2, however the calculations…

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Q: The element rhenium (Re) has two naturally occurring isotopes, 185 Re and 187 Re. Rhenium is 62.60%…

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Q: Find the mass of 1 molecule of Li H in gram. a. 7.949 b. 1.32 x1023 С. 4 d. 1.32 x10-23

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Q: For number 5 to 7, consider the following reaction. The complete combustion of methane, CH., can be…

A: CH4 (g)+ 2O2 (g)-------> CO2 (g)+ 2H2O (g) Number of moles = mass ÷ (molecular mass)

Q: 14.255 g of a compound with the molecular formula C5H4N4 contains ______ carbon atoms. Report your…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: In the reaction X + 3 Y 2 Z, the mass of X is 5.0 g and the mass of Z is 14.0 g. If the reaction was…

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Q: sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000 g sample of the…

A:

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

Q: What mass of phosphorus is present in 25 g P4S3? A. 14g B. 4.5g C. 11g D. 3.2g E. 100g

A: Since the Atomic mass of P = 31 g/mol and Atomic mass of S = 32 g/mol Hence molar mass of P4S3 =…

Q: Determine the mass of sodium in 15.5 g of NaNO3.   a. 17.4 g   b. 0.298 g   c. 4.19 g   d.…

A: Given that,mass of NaNO3 = 15.5 g Molar mass of NaNO3 = 84.9947 g/mol moles of NaNO3 = (mass of…

Q: 4. You have two samples of KI. You measured the amount of K and I in one sample. You were only able…

A: #4:(a): Actually we have to find how much of K was in the second sample, not Cl. In order to find K…

Q: Which of the following would not be considered spontaneous? Select one: O a. cooling a cup of coffee…

A: Spontaneous process : It is a process which occurs without any external input to the system.

Q: The number of particles and amount, respectively, in 45.2 g of potassium nitrate is 2.69 x 10 22…

A:

Q: 29. For items 29 - 32, please refer to the following chemical equation:CuCi2 + 2 NaNO3 - Cu(NO3)2 -…

A: Consider the given information is as follows; Reaction:      CuCl2     +  2 NaNO3   →    CuNO32   +…

Q: When 0.210 g of iron (atomic weight = 55.85 g/mol) is burned, 0.341 g of iron oxide is obtained.…

A: Given  Wt. If iron = 0.210 g  Wt. Of iron oxide = 0.341 g  Atomic weight of iron = 55.85 g/mol…

Q: 9. What volume of 6.00 MNAOH contains 2.50 mol NaOH? A. 2.50 L B. 6.00 L C. 2.40 L D. 0.417 L E.…

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Q: What is the mass of 4.9 moles of N2O5?   a.   52.92g   b.   5.292g   c.   0.5292g…

A: We have given the moles of N2O5 = 4.9 mole

Q: Calculate the mass of Na in 80.0 g NaCl. A. 31.5 g B. 6.2 g C. 40.0 g D. 1.9 g

A: molar mass of NaCl  =mass of Na +mass of Cl                                   =23+35.5…

Q: Find the mass of 1 molecule of Li H in gram. O a. 4 O b. 7.949 O c. 1.32 x1023 O d. 1.32 x10-23

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Q: 5. Compound X is composed of 52.2% carbon, 13.0% hydrogen, and the rest oxygen, by mass. The…

A: Compound X contain C= 52.2%                                    H= 13%…

Q: 9. Calculate the number of molecules present in 4.29 g of nitrogen dioxide (NO2). Danie192.1 10.…

A: 9. Given data: The mass of nitrogen dioxide is 4.29 g. To find the number of molecules present in…

Q: The formula for boron trichloride is BCl3. A. How many molecules are in 9.31 grams of boron…

A: Molecular formula of Boron trichloride is BCl3. It has three Chlorine atom and one boron atom. Molar…

Q: What is the mass of NaCl in a 1 L bottle of 2.00 M NaCl? a. 29.3 g b. 58.0 g c. 116 g d. 234 g

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Q: Which has the greater number of particles, 3.011x1023 N2 molecules or 14.01 g N2 molecules? a.…

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Q: When copper is heated with an excess of sulfur, Cu 2 S is formed. How many grams of Cu 2 S could be…

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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".