Find the percentage of mass of sodium (Na) in Na2s if it is 32.1%  sulfur (s) by mass.

Q: 11.6 g Fe2(SO4)3  contains how many grams of sulfur?

A: The compound given is Fe2(SO4)3  Hence molar mass of compound = Atomic mass of Fe X 2 + Atomic mass…

Q: A sample of methane, CH4 , has a mass of 77.00g. Calculate the number of methane molecules in the…

A: Mole concept: According to the mole concept, the number of methane molecules in one mole of methane…

Q: A compound is 47.35% carbon by mass, 10.60% hydrogen by mass and 42.05% oxygen by mass. What is the…

A: Calculating empirical formula.

Q: i. How many atoms of oxygen are in 8.1 g CO,? j. How many atoms of hydrogen are in 5.0 g NH3?

A:

Q: 1.51x1022 atoms of iron, Fe.

A: 1 mol contains atoms or molecules equal to the Avagadro's number.  Avagadro's number = 6.022 × 1023…

Q: Mg(s) + 2 HCl(aq) −−−→ MgCl2aq) + H2(g)   given that the mass of magnesium is 0.030 g, find the…

A:

Q: Calculate the mass (in g) of each sample.  5.73x10^20 SO3 molecules

A: Given:Number of molecules = 5.73x1020 molecules.Molar mass of SO3 = 80 g/mol.

Q: How many H atoms are there in (2.22x10^2) grams of NH3?

A: The answer to the following question is given as:

Q: #8: A 5.00 g sample of hydrated barium chloride, Bacl, nH,0, is heated to drive off the water. After…

A: Chemical compounds are the combination of molecules. Different molecules are involved in bonding and…

Q: A sample of trifluoroacetic acid, C,HF,O2, contains 72.1 g of fluorine. Calculate the mass of the…

A: 1- First calculate the moles of fluorine atoms :  We know that,  moles of F = ( mass / molar atomic…

Q: A compound is found to consist of 1.37g of iron and 2.62g of chlorine. What is the percent by mass…

A: Given that: mass of iron = 1.37 g mass of chlorine =  2.62 g  To find: the percent by mass of…

Q: Seawater is approximately 4.0% by mass dissolved ions, 85% of which are from NaCl. (a) Find the mass…

A: The concentration of seawater is 4% by mass. This implies that 4g of solute is present in 100 g of…

Q: [References] A mixture of CuSO, and CUSO, 5 H,0 has a mass of 1.215 g. After heating to drive off…

A:

Q: Diamonds are a crystalline form of pure carbon, and their mass is measured in units of carats (1…

A: Given: Mass of diamond = 84.37 carat And 1 carat = 200 mg = 0.200 g…

Q: What is the percent by mass of chromium (atomic mass = 52.00 g/mol) in Cr2S3 (mm = 200.20 g/mol)?…

A:

Q: Calculate the mass, in grams, of 1.751.75 mol of neon, NeNe.   mass of NeNe:…

A: The mass of 1.75 mol of neon is calculated as,

Q: A mixture of NaCl and NaBr has a mass of 2.00 g and contains 0.75 g of Na. What is the mass of NaBr…

A: Mass of NaCl is X and Mass of NaBr is Y Hence, X+ Y = 2 gm ……(1)   and  X = 2 - Y But, % Na = Mass…

Q: If 2.00 grams of Epsom salts are allowed to dehydrate in a warm oven overnight, the mass of the…

A: Mass percent of water in Epsom salt = 100 x Mass of water/Mass of Epsom salt Mass of Epsom salt =…

Q: 1. Find the necessary amount of Ag CO, in grams in order to obtain 79.1 g of silver. A92CO Ag(s) +…

A:

Q: In the following How many total atoms of Ca How many total atoms of P How many total atoms of O How…

A: The fundamental building blocks of matter are referred to as atoms. Protons, electrons, and neutrons…

Q: 42. Ethanol (C2H50H), a domestically produced fuel source, is often blended with gasoline. A sample…

A: Given mass of Ethanol (C2H5OH) = 45.6g To determine the number of carbon,hydrogen and oxygen atoms…

Q: What is the percent by mass of carbon

A: Percent by mass = (mass of C/total mass of compound) × 100%

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: Find the number of Na' ions in 2.92 g of NaPO,

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: The empirical formula for Antifreeze is CH,O. What would be the molecular formula if the mass of…

A:

Q: Number of atoms of C in 6 moles of C,H10 are: O 24.09x10^23 O 36.13x10^23 O 2.49x10^23 O…

A:

Q: A sample of trifluoroacetic acid, C2HF3O2, contains 87.3 g of carbon. Calculate the mass of the…

A: Given that: Mass of carbon = 87.3 g Mass of trifluoroacetic acid = ?

Q: Determine the mass (in grams) of aluminum present in 1.07 grams of Al2S3? Do not type units into…

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: If a sample of ethanol has a mass of 1.34 x 104 mg, d) How many C atoms are in the sample? e) How…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

Q: How many kilograms of AICI3 can be made from 150 kg of chlorine

A: The balance chemical equation for reaction of Al with with Cl2 gas is as follow…

Q: Calculate the mass, in grams, of 402 atoms of lithium, Li

A: Number of moles = number of atoms/6.022 x 1023 atoms  Mass = moles x molar mass

Q: Find the % composition of carbon and hydrogen in 48.00g of CH, if the mass of carbon in the sample…

A:

Q: 4.00 moles of carbon have a mass of? a. 4.60 g b. 23.0 g c. 92.0 g d. 11.0 g e. 48.0 g

A: The molar mass of carbon=12 g/mol The given number of moles of Carbon=4.0 mol

Q: The formula of cupric sulfate is? A. Cu(SO4)2 B. CuSO3 C. CuSO4 D. Cu(SO3)2 Q2: A silicon chip has a…

A: Cupric means copper in +2 oxidation state and the chemical formula of sulphate ion is SO42-

Q: Find the mass of 1 molecule of NH; in gram. a. 10 O b. 2.82 x1023 O c. 2.82 x10-23 O d. 17

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: Fe2O3(s)  +  2 Al(s) ------>  Al2O3(s)   +   2 Fe(l) 159.70           26.98                101.96…

A:

Q: 1. Find the necessary amount of Ag:CO, in grams in order to obtain 79.1 g of silver. A92CO, C: 12…

A: Silver carbonate decomposes into silver metal, carbon dioxide gas, and oxygen gas. The equation for…

Q: The mass in grams of iodine in a sample of BaI 2 that contains 15.7 grams of barium is

A: The moles of Barium ion is calculated as follows,

Q: Determine the number of atoms in 27.0 grams of bromine, Br. (The mass of one mole of bromine is…

A: Given : mass of 1 mole of bromine i.e Br = 79.90 g And mass of Br = 27.0 g

Q: How many C atoms are there in a 41.1 gram sample of C ? atoms

A:

Q: 2.845 x 1012 potassium ions equals how many moles of potassium ions?

A: 1 mol of potassium ions equal 6.022 ×1023ions    16.022×1023moles of potassium ions equal 1 ion

Q: You are given 1.0g samples of Iron (Fe), Silicon (Si), and Lithium (Li). Which of the three samples…

A: Applying mole concept and avogadro concept.

Q: The molecular formula of hexakis(methylthio)benzene is C12H18S6. What is the percentage (by mass) of…

A: We have to calculate the % by mass of C in hexakis(methylthio)benzene .

Q: How do you calculate the mass of Hydrogen in 12.00 g of NH3?

A: Given:Mass of NH3 = 12.00 g.Molar mass of NH3 = 17.031 g/mol.

Q: Calculate the mass of 14.4 moles HgO. (In Kilograms)

A:

Q: 3. Determine mass percent of nitrogen and iron in Fe(NO3)3.

A:

Q: 3009) + FeaOo6) → 2 Fecgy t 3 COa) g of CO(28.019/mol) rancts w/37.78g of FegO, (159.76 glmol), how…

A: The balanced reaction taking place is given as, => 3 CO (g) + Fe2O3 (s) ------> 2 Fe (s) + 3…

Q: What is the mass percent of chlorine in NH4Cl?

A: First, find the total mass of NH4Cl.NH4Cl = 54g/mol

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.