One mole of an atom of a substance is equal to the: Atomic mass of the element, in grams Collective atomic mass of the compound or molecule, in grams All of the choices Molar mass of the substance, in grams

Q: What is the number of moles of hydrogen gas in the sample

A: The number of moles of hydrogen gas can be calculated by the ideal gas equation which is given by…

Q: Part a and b choose a ratio shooting the relationship between the molar amounts of each element for…

A: The figure represents the 3D model of molecules. In part B and part A, 4 set of molecules are…

Q: Methyl tertiary butyl ether, or MTBE, is currently used as an octane booster in gasoline. It has…

A: The question  is based on the concept of mass percentage. mass percentage is defined as the  mass of…

Q: How many atoms are in 1.42 mol of pure aluminum?

A: Given information is as follows: Moles pure aluminium = 1.42 mol

Q: Which has the smaller mass, 1 mole of He atoms or 4 moles of H atoms?

A: Molar mass of He = 4.003 g/molMolar mass of H = 1.007 g/mol

Q: The number of moles of S in 2.8 x 1024 atoms of S is: 1.0 mole of S atoms 4.6 moles of S atoms 3.1…

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Q: What is the molar mass of the compound containing two elements if 0.38 mol of the compound weighs…

A: Given is, Moles= 0.38 mol Mass= 21.15 g

Q: A compound has the chemical formula CaX2, where X is an unknown nonmetal. The percent by mass of Ca…

A: Percentage by mass of compound means if total compound is 100 g then that component has mass…

Q: late the mass in grams of a sample of NO2 that contains 1.000 x 1025 molecules.

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Q: A compound is found to contain 34.60 % chlorine , 46.85 % oxygen , and 18.55 % fluorine by mass. To…

A: Given: Mass percent of chlorine = 34.60 % Mass percent of oxygen = 46.85 % Mass percent of fluorine…

Q: A sample is found to contain 0.650 mole of a chemical substance. a. How many atoms are present if…

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Q: What is the mass, in grams, of the following quantity of matter? a. 0.85 mole of copper atoms…

A: Given :- number of moles of copper atoms = 0.85 mol  To calculate :-  mass of copper (in grams)

Q: If there are 4.10 moles of H,4.10 moles of H, how many moles of each of the compounds are present?…

A: If a compound contains a fix number of moles of any element present in it then we can calculate the…

Q: How many O atoms are present in sodium perchlorate?

A: No. of oxygen atoms present in sodium perchlorate = ?

Q: What is the molecular formula of the molecule with molecular mass of 120.12g/mol. and an empirical…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: Calculate the molar mass of the elements (go to the nearest one if your answer does not exactly…

A: Given: 25 g of an element contains 2.37 x 1021 atoms 25 g of an element contains 2.89 x1021 atoms

Q: A substance is submitted for combustion analysis. The results show that the compound has the…

A: In this question, only 90% of the composition is given. That is 24+32+28+6 = 90  So the question may…

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

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Q: How many atoms are present in (6.78x10^1) g of an element with the following molar mass.…

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Q: One mole of water contains 6.022 × 1023 hydrogen atoms

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Q: What is the molar mass of unknown Q whose mass is 23.08g and .0389moles Hint Molar Mass = g/mol %3D

A: Given  Mass = 23.08 gram  Number of mole = 0.0389 mole  Molar mass = ?

Q: You have 675g of Sulfur (S). How many moles of Sulfur (S) is that? 21.0 moles 29.3 moles 2.19 x 104…

A: Give that : Mass of sulfur (s) = 675 g We have to determine the moles of sulfur.

Q: How many atoms of titanium are there in  1.07 mole of each of the following?   titanium(IV) chloride…

A: Avogadro's number, number of atoms/ molecules in one mole of any substance, equal to 6.022 × 1023.

Q: Oxygen makes up 46.7% by mass of the earth's crust. How many grams of oxygen are present if a sample…

A: Given that, 46.7% by mass of the crust of earth is made up of Oxygen. It implies that every 100 g of…

Q: What is the relationship between the mass of a compound and the number of moles it represents?

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Q: Calculate the mass of water former by the complete reaction of 96.1 g of propane with oxygen

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Q: Given 88.0 grams of Boron, how many atoms of Boron (B) are present

A: To know, number of atoms, first we have to find out number of moles.

Q: Molar mass is defined as: a. the mass of one mole of a substance in grams. b. the mass of one gram…

A: option a

Q: Insulin is a hormone that regulates the metabolism of carbohydrates, protein and fats. Bovine…

A: The mass percentage of Sulfur in bovine insulin can be calculated by: Mass% = Mass of S in bovine…

Q: I. N203 containing 0,6 mole oxygen atoms. II. CO2 containing 6 grams of carbon III. C2H4 containing…

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Q: Which one of the following statements concerning the mole is false? One mole of a substance has the…

A: Since moles = mass / molar mass Hence 1 moles of substance will have different mass compared to…

Q: Calculate the number of moles in a sample of chromium containing 5.00 * 1020 atoms and the mass of…

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Q: Oxygen makes up 46.7% by mass of the earth's crust. How any grams of oxygen are present if a sample…

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Q: How many moles of atoms are contained in each of the following? a.) 7.50 x 10^24 I2 Molecules b.)…

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Q: Which of the following represents an empirical formula? a. C3H6O3 b. N2O2 c. CH4 d. C2H2Br2 e.…

A: The simplest ratio of the elements in the chemical compound is called empirical formula.The ratio…

Q: What element has 3.63*10^23 atoms in 6.52 g of material

A: Given, No of atoms in the element = 3.63×1023mass of element = 6.52 g

Q: What is the amount of H present in the original sample, in moles?

A: We have moles of H2O in the compound = 0.00610   (= Given mass of water (0.110 g) divided by the…

Q: A sample of magnesium ribbon is ignited in a crucible to form magnesium oxide. Refer to Example…

A: Mass of crucible and cover + magnesium metal = 33.741 g Mass of crucible and cover = 33.500 g Mass…

Q: The molar mass of a compound is the sum of the atomic molar masses for the elements in the compound,…

A: Given, The molar mass of a compound is the sum of the atomic molar masses for each element in the…

Q: An antibiotic contains 8.82% of sulfur. If there is/are 1 atom(s) of sulfur in the antibiotic, what…

A: Given: % of S in antibiotic=8.82 % Number of S atoms=1 To find: Molar mass of antibiotic

Q: The total count of atoms in 1.3 mol of argon in its elemental form is:

A:

Q: Complete the following table. Formula Number of SO42−SO42− units Number of sulfur atoms Number of…

A: First we are going to write the correct formula of calcium sulphate then we are going to calculate…

Q: Order them in decreasing order of the amount of oxygen. = Chlorate = Hypochlorite = Chlorite E…

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Q: NaNO3 → NaNO2+ O2 C3H8 + 02- C02 + H2O Fe + H20 → H2 + Fe304

A: The balanced chemical equations are given below.... 7. Given reaction,  NaNO3 ----> NaNO2 + O2…

Q: How many atoms are there in 3.33 moles of strontium? * 2.00 x 1024 atoms * 3.21 x 1032 atoms * 1.11…

A: GivenMoles of strontium = 3.33 moles Molar mass of strontium = 87.62 g/moleNo of atoms in 3.33 moles…

Q: All but one of the following statements is true. Which one is not true?   Ten grams of a pure…

A: A mole can be defined as the amount of the substance present exactly in the 12 g of carbon 12…

Q: Round all answers to the hundredths place unless noted otherwise. Molar mass should be rounded to…

A: The concentration of a solution states the amount of a solute present in a given volume of the…

Q: How is the mass percent of elements in a compound different for 1.0 g sample versus a 100g sample…

A: Compounds comprising variety of elements are formed by combinations of these elements in certain…

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.