A sample of H2O that contains 3.79 ×10^25 water molecules is what amount of water (in moles)? What is its mass? Show your work and use dimensional analysis.

Q: Calcium chloride is 36.11% calcium. How many grams of calcium are present in 2.55 x 103 g of calcium…

A: The mass percent of the calcium in calcium chloride is = 36.11 % The mass of calcium chloride is =…

Q: What is the formula for the compound sodium hypochlorite? Explain how you were able to write the…

A: Ionic compound: Ionic compound composed of cation which is positively charged (+charge) and an anion…

Q: a. How many ATOMS of boron are present in 7.41 grams of boron trichloride? 3.805x10^21 atoms of…

A: Molecule given = BCl3 1 molecule of BCl3 = 1×6.022 ×1023 Molar mass of BCl3 = 117.3 g/mol 117.3 g of…

Q: What is the mass percentage of carbon in C6H12O3? Express your answer as a percentage (i.e., out of…

A:

Q: A sample of a compound with the molecular formula C20H24N2O2 contains 2.75 x 1024 nitrogen atoms.…

A: Molar mass of any substance is the mass of one mole of the substance, which is expressed as g/mol.…

Q: Assume that the molar mass of A is 82.93 grams per mole and the molar mass of E is 24.61 grams per…

A: Atoms are the smallest unit of the matter, anything which occupies space and has mass is known as…

Q: The chemical formula of trinitrotoluene (TNT) is C7H5N3O6. What is the molecular mass of TNT?…

A: We have to find the molecular mass of trinitrotoluene (TNT) is C7H5N3O6. Atomic mass of Carbon =…

Q: A sample of nickel silver contains 18.0% nickel by mass. What mass of nickel silver must be melted…

A: Given: Sample of Nickel Silver contains: 18% Nickel by mass.

Q: Suppose you need 7.0 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A: Given data :- Length of required tow chain = 7.0 mGrade of tow chain = 70 Diameter of tow chain =…

Q: The compound phthalic acid consists of carbon, hydrogen and oxygen. When a 1.969 g sample of…

A: First calculate the number of moles and mass for C and H. Use that to calculate mass of O and its…

Q: Estimate the number of millimoles of Ca(NO3) 2  that contain 4.78 x 1022 formula units of Ca(NO3)2.…

A: The term formula unit in chemistry can be defined as the empirical formula of a given covalent or…

Q: Carbon tetrachloride, CCI4, was widely used as a refrigerant and in fire extinguishers until it was…

A:

Q: Provide the chemical formula (including brackets where appropriate) or systematic name for the…

A: Given : Number of molecules of molecular chlorine = 5 x 1023

Q: Suppose you have a bucket of sand containing 1.5 billion grains of sand ( 1.5×109 grains). Most of…

A: Total number of grains = 1.5 ×109 grains Concentration of brown sand is = 4.0 %  The number of brown…

Q: A mechanical engineer trainee is trying to study the combustion of natural gas, which is primarily…

A: Molar mass of a compound is equal to sum of atomic masses of all atoms present in that compound.…

Q: 2Na + Cl2 → 2NaCl. If I want to make 100.0 g of salt, how much elemental chlorine would I need?

A: First convert mass into molar mass  Then use mole-mole relationship  After getting mole of  Cl2 then…

Q: How many molecules are there in (3.61*10^ ^ 3)N 2 l 6 Answer to 3 significant figures. Note: Your…

A: Given :  Number of moles of N2I6 = 3.61 × 103  To calculate : Number of molecules

Q: A 5.05 g sample of quartz (SiO2) contains 2.36 g of silicon. What are the percentages of silicon and…

A: The mass of sample of quartz is 5.05 g. The mass of silicon in quartz is 2.36 g.

Q: A student has been tasked to determine the percent water in thalium (III) nitrate, Tl(NO3)3 . xH2O.…

A: Thalium (III) Nitrate is a salt having the molecular formula Tl(NO3)3. In normal conditions, it…

Q: What is the mass of 7.10 moles of magnesium chloride, MgCl2? Express your answer with the…

A: 1) The compound given is MgCl2 with moles = 7.10 mol Since molar mass of MgCl2 = Atomic mass of Mg +…

Q: How many grams would 4.904 x 10^22 atoms of Lithium weigh? Show all work and report your answer to…

A: Given atoms of lithium is 4.904 × 10^22 * first we have to convert atoms of lithium into…

Q: A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The…

A: Density of a substance is equal to the mass of the substance divided by its volume. Write the…

Q: Lead is found in Earth’s crust as several different lead ores. Suppose a certain rock is 38.0% PbS…

A:

Q: What is the mass of 3.981 x 10^25 molecules of ammonium chloride, NH4Cl? An unknown gas is found to…

A: Welcome to bartleby !

Q: How many molecules of ethanol (C2H5OH) (the alcohol in alcoholic beverages) are present in 145 mL of…

A: In order to calculate number of molecules of ethanol, first we have to calculate the number of moles…

Q: 24. The reaction of sodium alkoxide of of solum phenoxide with an organic halide to form an ether is…

A:

Q: 4. A student has been tasked to determine the percent water in thalium (III) nitrate, TI(NO3)3×H2O.…

A: On heating and consequently allowing the hydrate to stand in open air overnight allows the hydrate…

Q: A mixture of 50.0 g of S and 1.00x10^2 g of Cl2 reacts completely to form S2Cl2 and SCl2. What mass…

A: When S react with Cl2, it will form S2Cl2 and SCl2 so first write reactant and product then balanced…

Q: 1. A sample of acetic acid has 5.82x10^25 molecules. How many grams of oxygen are present?

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

Q: Consider a 134.5 g sample of the compound manganese(IV) perchlorate. Using the formula Mn(ClO₄)₄ (MM…

A: Weight of sample = 134.5 gm  Molar mass of MN(ClO4)4 = 452.74 g/mole

Q: Mass of NaTcO4 Mass of NaOH =

A:

Q: Determine the number of ethylene molecules, C 2 H 4 , in a 7.3 g sample of ethylene, [ans: 1.6 X 10…

A:

Q: What is the mass (in grams) of 3.2 x 1021 molecules of ibuprofen (C13H1802; molar mass 206.3 g/mol)?…

A: Given: The molar mass of ibuprofen = 206.3 g/mol We have to calculate the mass of 3.2×1021 molecules…

Q: What is the mass percentage of Na in Na₂S? Provide an answer to two decimal places.

A:

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: Using the balanced equation from Question #8, how many grams of lead will be produced if 2.54 grams…

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.