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Q: 1. How many MOLECULES of xenon trioxide, XeO3, are present in 6.25 grams of this compound? 2. How…

A: Since you have posted multiple questions according to guidelines I am solving first two.If you want…

Q: One mole of a compound has the mass that is equal to the molecular mass

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

Q: Sait efflorescent A hydrated salt is 21% water (anhydrous formula weight is 136.1). a. How many…

A: Some chemical compounds on crystallization from water solution produce a crystal that contains water…

Q: How do I find what the mL of NaOH added and the pH at the equivalence point?

A: AT EQUIVALENCE POINT THERE WILL SUDDEN JUMP IN pH.

Q: How many molecules are in each sample? 66.3 g N2 Express your answer using three significant…

A: The number of molecules of N2 present in 66.3 g of N2 sample is

Q: N2 + 3H, 2NH3 Hw mey mos of N do you need to make moles of N? rytothat tyin gven to y thie p otude…

A: Moles of H2= 0.37 moles  Moles of NH3=?

Q: A compound with the empirical pormuia Ctt, has a molar nass OP gimol.What is the molecular Formuia…

A:

Q: Sulfur has four isotopes and has an atomic mass of 32.066 amu. The four isotopes have the following…

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

Q: A grain of maize pollen has an average mass of 250 ng. How much would a mole of these pollen grains…

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

Q: How many grams of C are in 35.1 g of C6 H10S? Express the number of moles to three significant…

A: Given, mass of C6H10S = 25.1 g Now, moles of C6H10S  can be calculated as,            moles of…

Q: grams of I?

A:

Q: A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent…

A: A. Given that : The given hydrocarbon is C10H22. We have to calculate the % composition (by mass) of…

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: Actual weight of Na,CO, used mass Na,CO, + beaker = 1니3.525 %3D mass beaker = 142.313 g %3D mass…

A: For Na2CO3, Molecular weight=2(Atomic weight of Na)+Atomic weight of C+3(Atomic weight of O)

Q: casbon 35.) Calaulate He grams. muss in he l,25 motes of aluminur chloride b. 3.35 moles of sodium…

A: multiplication of moles with molar mass will give the mass of that compound or molecules. As per…

Q: Caffeine, C HNO, a B 10 4 2 common stimulate that is found in soft drinks, tea and coffee. How many…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: Calculate the percent mass to 2 decimal places of each element in benzene C6H6. %C= %H=

A: Given that, compound= C6H6 molar mass= 78 g mol-1 then calculate, %C & %H = ?

Q: An Alloy is made by mixing 40.0 grams of tin, 30.0 grams of lead and 55.0 grams of copper. What is…

A: Here we are provided with the mass of each metals in the given alloy. So, it is very easy to find…

Q: HO octz if It 30

A:

Q: 1. Os0, pyr н но 2. NaHSO,(aq) ÓH ČH3 Br, NaOH H,0 CH 1. BD,, THF но 2. H,0, OH- ČH3 CH3 Br, н но…

A:

Q: 2T) A comprnd Cim 15 5.१५°% Olygen is 5.9496 mass of this com A) what Is the B) what IS the

A: Percentage of hydrogen = 5.94 %  Percentage of oxygen = 94.06 % Molar mass of compound = 87.55 g/mol

Q: O Balance the following readtion tor the comoustren lof hexanes Cotlia + Oz-> cOz +th o AH--995/ccl…

A:

Q: How many grams of F are in 525 g CaF₂? mass: 50 g

A: Here, we have to calculate the mass of F that is present in 525 g CaF2.

Q: Measurements show that unknown compound X has the following composition: element mass % zinc 75.5%…

A: Given‐Unknown compound X has 75.5% Zn  and 24.7% O,then,Zn-75.5/65.4=1.154O-24.7/16=1.543

Q: How many grams of Se are there in a sample of Se that contains the same number of moles as a 65.8…

A:

Q: Convert the following Moles to the number of Particles. (1) 0.275 mol of Aluminum, Al

A: (B)  1) given :-  Number of moles of Al = 0.275 mol  To be calculated :-  No. of atoms of Al

Q: Calculate the mass of sodium aurothiomalate (CH.AuNaO4S) that contains 100 g of go

A: we are given 100 gram of gold in C4H4AuNaO4S  we need to find the mass of C4H4AuNaO4S

Q: Determine the number of moles in 2.58 kg of lithium Sulfate (Li₂ sou) Balance this equation: -NH3t…

A:

Q: How many moles of N are in 19.6 g of dipyrithione C10H8N2O2S2?

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Thus,

Q: Calculate the mass in grams of 1 mole of footballs if one football has a mass of 0.43 kg.

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.