Unknow A sample ( given density= 0.795 grams/mL) Volume:24.6mL #of moles in sample:0.31825 moles Find the mass, molar mass, and number of molecules in sample.

Q: How many formula units of CaCO3 are contained in 350. g CaCO3?

A: The given data contains, mass of CaCO3 = 350 g

Q: 0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83…

A: Given: Mass of hydrate = 0.279 g Mass of anhydrous CoCl2 = 0.197 g Molar mass of CoCl2 = 129.83…

Q: Determination of a chemical formula, mass of crucible is 14.9234g, crucible + hydrated sample is…

A: Given  Mass of Crucible = 14.9234  Mass of hydrated sample = 1.6618 gram Mass of crucible + Mass of…

Q: 4. Calculate the number of moles of CuSO4•5H2O in 100 g of the solid.

A: Given details, Mass (m) = 100g Atomic mass of CuSO4.5H2O = 249.68 g/mol To calculate the number of…

Q: How many molecules of C,H, are present in 385.42g of CH,,? 10 10

A: no of moles=mass/molar mass Molecules=moles×6.023x1023

Q: Use the following data and steps below to calculate the formula of the copper chloride hydrate.…

A: Given: Weight of empty aluminum pan      = 0.4661 g Weight of CuCl2. x H2O sample       = 0.8390 g…

Q: Answer the following questionsn related to the analysis of CaBr2. a.) A student has a 10.0 g sample…

A: Given, a) A student has a 10.0 g sample of CaBr2.  Show the setup of the calculation to determine…

Q: Mass --> Moles 1. What is the mass of 3 moles of potassium nitrate? 0 75 moles of aluminum oxide?

A: Since you've posted multiple questions, we'll solve only the first question for you. If you want any…

Q: How many grams of magnesium chloride are present in 0.7151 moles of sample?

A: Given Moles of magnesium chloride = 0.7151 mol

Q: An antifungal molecule has a molar mass of 2448 g/mol.  a. How many moles are there in a 1.567g…

A: The given weight of sample is 1.567 g. The given molar mass is 2448 g/mol.

Q: The number of molecules in a sample of NH3 weighing 8.50g?

A:

Q: 0.0524 moles of h2o equals how many molecules of water?

A: Number of moles of H2O (water) = 0.0524 moles  Number of molecules of water = ?

Q: a) Determine molecules of C5H5N in 16.00 g of C5H5N (molar mass = 79.11g/mol). b) Explain how the…

A: a) Given : Mass of C5H5N = 16.00 g And molar mass of C5H5N = 79.11 g/mol.

Q: Set up the mole ratio of CO2to O2.

A: For the general case, the atmospheric pressure is 1.00 atm and temperature 298.15 K, the volume of 1…

Q: A sample is found to contain 66.8% NaHCO3 by mass. What is the mass of NaHCO3 in 4.25g of the…

A: Mass percent :- The mass of a substance present in 100 grams of sample is called its mass percent .…

Q: How many moles of H2 and N2 can be formed by the decomposition of 0.185 mol of ammonia, NH3?

A: The decomposition reaction of ammonia that will take place is  2 NH3 ------> N2 + 3 H2

Q: Given the following percentage composition: 43.64% phosphorus and 56.36% oxygen; and molecular mass…

A: The given data contains, Phosphorus =43.64% Oxygen =56.36% Molecular mass =141.9 g

Q: How many oxygen (O) atoms are present in a 254 gram sample of carbon dioxide (CO2) gas?

A: Since moles of carbon dioxide = mass of carbon dioxide / molar mass of carbon dioxide molar mass of…

Q: What is the maximum mass of aluminum chloride that can be formed when reacting 22.0g of aluminum…

A: The balanced chemical equation is given by

Q: Calculate the number of moles of chlorine present in 120  g g of chlorine gas.

A:

Q: 32. How many moles are there in 8.5 x 1025 molecules of CO,? 1.4 X 102 mol 7.1 X 10-2 mol 5.1 X 1049…

A: Please find your solution below : Avogadro's number is a factor that determines the number of units…

Q: Determination of a chemical formula, mass of crucible is 14.9234g, crucible + hydrated  sample is…

A: Mass of hydrated sample =( Mass of crucible + hydrated sample) - Mass of crucible

Q: What is the mass percentage of C in morphine, C,,H1,NO,? Provide an answer to two decimal places.

A: We have many molecules around us. They all are composed of different elements and have different…

Q: One mole of helium contains less molecules than 1 mole of Argon true or false?

A: Explanation as follows

Q: 9. How many grams of the insecticide calcium chlorate must be measured if a sample is to contain…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: 2. The air in a flask is to be replaced with He gas in a way similar to how air is replaced in the…

A: Air is homogeneous mixture of many gases. The major component of air is nitrogen gas(78%). The molar…

Q: 1, determine the mass of blue dye in the solution. ( of the dve is 792 84g/mol).

A:

Q: A solution of H2SO4 contains 65% w/w of the acid, and has a density of 1.55 g/mL. How many molecules…

A: Answer:- This question is answered by using the simple concept of calculation of number of molecules…

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: Calculate mass of phosphorous atoms in 117 g of P2O5. M(P2O5) = 284 g/mol; M(P) = 31 g/mol Answer:…

A:

Q: Given the following percentage composition: 43.64% phosphorus and 56.36% oxygen; and molecular mass…

A: Given: percentage of phosphorous=43.64% percentage of oxygen=56.36% molecular mass=141.9g Atomic…

Q: mass of 1.2 × 10^23 atoms of phosphorus (molar mass= 31 gm/mo

A: The one mole of a substance contains 6.022×1023 number of its atoms.here moles of…

Q: A 161 g sample of MnCl₂·nH₂O yields 112 g of the anhydrous compound after heating. Determine n in…

A: A 161 g sample of MnCl2.nH2O yields 112 g of anhydrous compound after heating. We have to determine…

Q: 3. How many moles are in 1.838 liters of nickel, Ni? xby 224L MOLES LITERS by 22.4L MOLES 4. How…

A:

Q: 8) How many moles of NO will contain 7.89 × 1020 m

A: One mole of any compound contain Avagadro number of molecules. Avagadro No. (Na) = 6.022 × 1023

Q: In a lab experiment, 7.97 g of phosphorus reacts with bromine to form 69.65 g of phosphorus…

A: When mole fraction of element is multiply by 100 we obtained percentage by mass .

Q: Although somewhat toxic, barium chloride has been used as a cardiac stimulant. Calculate the number…

A: % by mass is given by  % by mass = mass of solute X 100 / mass of solution  Since here solute is…

Q: Consider a 33.1g sample of the compound diphosphorus pentabromide  Determine what quantity in moles…

A: The relation between mole and mass is related as follows : mole = mass/molar mass

Q: A sample is found to contain 66.8 % NaHCO, by mass. What is the mass of NaHCO, in 4.25 g of the…

A: Mass by mass percentage (w/w) When mass of solute in a solution is expressed in grams of solute in…

Q: Calculate the moles of C2H6O in 8.16x10^24 molecules of C2H6O

A: For C2H6O , Number of molecules = 8.16 × 1024

Q: Determine the number of moles of phosphorus contained in 4.41 × 1024 atoms of phosphorus.…

A: Given , Number of atoms of phosphorus = 4.41 × 1024

Q: 4) 4.00 mole H,0 to grams 5) 815 grams Cal(OH), to mole

A: For 4) moles of H2O = 4.00mol   We know that, molar mass of H2O = 18gNow,mass of H2O = no of moles x…

Q: 24. How many moles are there in 2.0 x 10^(22) molecules 02? O 0.063 moles O 0.053 moles O 0.043…

A:

Q: The density of carbon tetrachloride is 1.59 g/mL. How many moles are present in 50.0 mL of carbon…

A:

Q: Convert to moles 10.0mL H2SO4 (96%, 1.84g/mL)

A: To find mole , we have mass of H2SO4. Mass can be find using the following data.   The solution is…

Q: Describe a "mole" used in chemistry. First, define it, then give examples, then why it's so…

A:

Q: Part C In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol).…

A:

Q: How many grams of NH 3 will contain 5.00^ * 10^ 24 NH 3 molecules?

A: 1. In physical chemistry, mole is used for the measurement of quantity or atoms or molecules in…

Q: The density of lithium (Li) is 0.534 g/mL. Determine the molar volume of lithium.

A:

Q: 25 a compound has empirical formula of CH4O2 and a molar mass of 144 g/mol. What is its ?molecular…

A:

Q: In the presence of cyanuric acid, melamine can form crystals that potentially cause renal failure if…

A: To find out the which contains the most nitrogen, we need to find out the the moles of nitrogen in…

Q: Calculate the number of moles of ClCl atoms in 2.41×1024 formula unitsformula units of magnesium…

A: Applying mole concept.

Q: How many oxygen atoms are present in 50.0 g sulfur dioxide? Please show me how to set up

A: In this question, grams of Sulfur dioxide ( SO2 ) is given and you will need to findout the number…

Q: 39. Calculate the number of molecules present in each of the following samples. a. 4.75 mmol of…

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

Q: A sample of a compund made entirely from copper and oxygen was founf to have a total mass of…

A: Given,Total mass of sample = 0.1431gMass of copper = 0.1271gThe mass of oxygen is determined as,

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".