Ⓒ Macmillan Learning A sample of hydrogen sulfide, H₂S, has a mass of 51.00 g. Calculate the number of hydrogen sulfide molecules in the sample. number of molecules: molecules

Q: 1. A chemist determines that rust. What is the percent composition of each element in the In a lab,…

A: 1. Solution - According to the question - Given values - Iron = 1.26 gram O2 = 0.54 gram Formulas -…

Q: Omol

A:

Q: 2. How many GRAMS of manganese(II) hydroxide can be made from 2.94 grams of manganese(II) ? grams…

A: The stoichiometric chemical reaction is one in which amount of reagents and products is such that…

Q: 2. Calculate the following, with proper number of significant figures: Molar mass of AL(PO4) is…

A:

Q: A compound of potassium had the following percentage composition: K 44.90%; H O.5787%; P 17.78%. The…

A: Given : K = 44.90 % H = 0.5787% P = 17.78% O = 100 %- (44.90 % + 0.5787% + 17.78%) =  36.74%

Q: A piece of gold ingot has a mass of 257 g and a volume of 13.3 cm3. Calculate the density of gold in…

A: The mass per unit volume of a substance is known as the density of the substance. The density of a…

Q: How many total atoms are there in 64.5 g of hydrazine (N₂H₂)? total atoms: atoms

A: Calculate the molar mass of hydrazine ():Molar mass of  = 28.02 g/mol + 2.02 g/mol = 30.04…

Q: A 24.82 g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to…

A:

Q: A sample of hydrogen sulfide, H2S, has a mass of 57.25 g. Calculate the number of hydrogen sulfide…

A: Given data,Mass of H2S=57.25gMolar mass of H2S=34.1g/mol

Q: This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE):…

A:

Q: Use the periodic table to calculate the GFW (molar mass) of Ca3(PO3)2 to 5 significant figures.  Do…

A:

Q: One 55 g serving of a cereal provides 267.0 mg of sodium, which is 11.6 % of the recommended daily…

A: Convert 11.6% into 100% using mathematical interpretation & convert mass into moles by using the…

Q: A sample of Al2(SO4)3 contains 11.2 g of oxygen, find the number of moles of Al2(SO4)3 (A) 0.0979…

A:

Q: A molecular compound is found to consist of 30.4% nitrogen and 69.6% oxygen. If the molecule…

A: Interpretation: A molecular compound is found to consist of 30.4% nitrogen and 69.6% oxygen. A…

Q: The number of moles of atoms in one mole of carbon dioxide gas, CO2, is

A: Given :- number of moles of CO2 = 1 mol  To calculate :- number of moles of atoms in 1 mol CO2

Q: How many moles of NaOH are in 2.2x10426 formula units of NaOH? )A ה docimal

A: Given :- number of formula units of NaOH = 2.2 × 1026 formula units  To be calculated :- number of…

Q: What is the number for each atom present in the empirical formula of a compound that has 59.98%…

A: The answer to the following question is-

Q: A beaker contains 70 mL of water. How many molecules of water does this beaker contain? (hint: the…

A: Given: The volume of water = 70 mL The density of water = 1 g/mL Standard data: The molar mass of…

Q: Show all work for all parts of the question for full credit and use your units. Use 2 decimal places…

A: Interpretation -  For KNO3 ,  what is the molar mass - To determine the percentage composition in…

Q: Answer the following questions on Avogadro's Number and the mole. (SHOW WORK and round ALL final…

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

Q: A compound has the Following percent composition: , 7.19% 92.81% bromine phosphorus. Find the…

A: Given, Mass percentage of bromine, Br = 92.81 % Mass percentage of phosphorus, P = 7.19 %

Q: Regular treatment with low dose aspirin is used to help prevent cardiovascular disease. How many…

A: mass of aspirin = 240. mg = 0.240 gMolecular formula of aspirin: C9H8O4Note: molar mass of aspirin…

Q: This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel…

A: NOTE : The formula given by you in question for nickel tetracarbonyl as NiCO4 is incorrect  The…

Q: This is the chemical formula for nickel tetracarbony! (a powerfully poisonous liquid used in nickel…

A: Given -: Chemical formula of nickel tetracarbonyl = Ni(CO)4 Moles of Nickel in Ni(CO)4 sample  =…

Q: A sample of Al2(SO4)3 contains 11.2 g of oxygen, find the number of moles of Al2(SO4)3   0.0979 mol…

A: The molar mass of an element can be defined as mass in grams of 1 mole of that substance. It is…

Q: Question 1: Select the best answer for the following questions? 1. Number of ions in 0.5 mole of…

A:

Q: An herbicide contains only C, H, Cl, and N. The complete combustion of a 225.0 mg sample of the…

A:

Q: A newly discovered element is named columbian. The molar mass of columbium chloride is 125.0 g/mol.…

A: The molar mass of columbium chloride is = 125.0 g/mol The number of moles of columbium chloride is =…

Q: A patient is having an allergic reaction and takes a 50.0 mg tablet of the over-the-counter…

A:

Q: D How many atoms of phosphorus are present in 30.1 mol of phosphorus? number of atoms:

A: Given,Number of mols of phosphorus given = 30.1 molWe need to find the number of atoms of Phosphorus…

Q: Calculate the molecular mass of carbon dioxid Show your work.

A: Calculate the molecular mass of CO2

Q: A sample of Al2(SO4)3 contains 14.2 g of oxygen, find the number of moles of Al2(SO4)3

A: Given :  Mass of oxygen atoms = 14.2 gm

Q: Use the References to access important values if needed for this question. 1. How many MOLECULES of…

A: Q

Q: How many moles of NO2 are in 5.2x10^26 molecules of NO2 ? Round your answer to 1 decimal place.…

A: Given: Molecules = 5.2×1026  To find: The number of moles

Q: 5. When propane gas burns, it reacts with oxygen to yield carbon dioxide and water. 1 mole C3Hs+…

A: Balance the chemical equation as follows:

Q: This is the chemical formula for epinephrine (the main ingredient in adrenaline): C,H1303N A…

A: It is given that the chemical formula of epinephrine is C9H13O3N and a biochemist measures that 34…

Q: What quantity is needed to convert between the moles of carbon and the number of carbon atoms in a…

A: Moles of Carbon atom = amount of carbon atom/atomic mass of carbon Number of carbon atom means how…

Q: How many valence electrons do atoms of each of the elements have? Sr: valence electrons Xe: valence…

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

Q: Answer the following questions on Avogadro's Number and the mole. (SHOW WORK and round ALL final…

A: 1)  2.41 x 1024 molecules of CaCl2  2) 2.0 moles of He 3) 3.0 moles of NaCI

Q: The mole is a unit of measurement, which chemists routinely utilize. Which of the following molar…

A: A mole is defined as the amount of substance tht contains the same number of atoms, molecules, ions…

Q: Question 1 of 11 What quantity in moles of sodium atoms do you have if you have 5.00 x 1023 atoms of…

A:

Q: There are 6.02 * 1023 atoms in the chemical quantity called a mole. How many atoms are in 1/2 of a…

A: 1 mol = avogadro no.of atoms = 6.02 × 1023 atoms

Q: 88 Atoms Molecules Mixture

A: Atoms are the smallest part of a chemical element.The atoms of element combines in definite…

Q: This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel…

A:

Q: A properly inflated NBA basketball can hold 7.11L of oxygen gas (O,). How many molecules would be in…

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

Q: Macmillan Learning How many grams of Br are in 395 g CaBr₂? mass:

A:

Q: Question 34 How many grams of oxygen (O) are present in a 6.35 g sample of potassium nitrate (KNO3)?…

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.