Mass of magneisum before experiment is 0.33g   mass after is 0.49 g   Calculate the number of moles of oxygen from the mass of oxygen

Q: moles of

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Q: (Review Topics] [Refe Use the References to access important values if neede A compound is found to…

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Q: Calculate the atomic mass of of sulfur if 95.00% of all sulfur atoms have a mass of 31.972 amu,…

A: Average atomic Mass: It is calculated for elements having isotopes. Isotopes: The elements which has…

Q: percent

A: CuO  + H2 ------------------ Cu  + H2o  Mm of CuO = 79g No of mole of Cu is = 4.7/79= 0.21mol From…

Q: The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the…

A: To find the average atomic mass, summing the masses of the elements isotopes, each multiplied by…

Q: mass

A: moles of Compound = ( mass of Compound / molar mass of Compound )  Mass of the Compound = moles of…

Q: What is considered to be the molar mass? O the mass, in grams, of one mole of elements of a single…

A: Option 1st will be correct.

Q: Help me with understanding how to calulate mass for A1 and A2

A: Molarity = mole of solute(mol)volume of solution (L)Mass of compound = moles × molar mass1mL =…

Q: Gold (Au) is one of a group of metals calledthe coinage metals (copper, silver, and gold). How many…

A: Solution :      Avogadro's number is defined as the number of particles present in one mole of the…

Q: 1.25 moles of PbO2 have a mass of

A: Given  Number of mole of PbO2  = 1.25 mole  Mass = ?

Q: If a penny is made of 3.11 grams of copper, how many atoms of copper are in the penny? Show your…

A: Molar mass of Copper(Cu) is 63.546 g/mol

Q: A toy top has a mass of 32.0lg Cu. How many atoms Cu are in this spinning top, given that the…

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Q: One atom of an unknown element has a mass of6.66 × 1 0 -23 g. What is the identity of this element?

A: Molar mass is the mass of Avogadro's number (6.022×1023) atoms.

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: According to the unit conversion, 1 mm is equal to 1×109 pm. The diameter of tungsten is 274 pm.…

Q: Two thirds of the atom in a molecule of water is hydrogen. What percentage weight of a water…

A: Given: Hydrogen atoms in a water molecule = 2/3 Atomic weight of hydrogen = 1.008 g/mol Atomic…

Q: Gaseous butane will react with gaseous oxygen (02) to pr 1.16 g of butane is mixed with 6.9 g of…

A: Given the chemical reaction between butane gas and oxygen gas. The products of the reaction are:…

Q: what is the mass element of calcium?

A: Mass of an element is represented by A in symbolic representation of element.

Q: Determine the mass, in grams, of 0.710 moles of S (1 mol of S has a mass of 32.07 g).

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Q: Compare a mole of Ag-108 and a mole of Pt-195 usingatoms, protons, electrons, and neutrons.

A: Given; 1 mol of Ag-108 amu. 1 mol of Pt-195 amu.

Q: alculate reduced molar mass (in g/mol] for two particles with masses 30.4 g/mol and 57.7 g/mol. Note…

A: Given mass of particle 1(m1) = 30.4 g/ mol Mass of particle 2(m2) = 57.7 g/ mol Reduced mass =?…

Q: protons and neutrons since they both have a mass of 1 amu. Complete the table to show each…

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Q: Consider two compounds. Compound A contains 2.77 g of phosphorus and 9.53 g of chlorine. Compound B…

A: Given,Mass of Phosphorus in compound B =11.9gMass of chlorine in compound B =40.9g

Q: mass Al = 27.0g A1 find the mass of AI mole AI जनद y=.073750. f

A: Given, y ( 27.0 g Al / mole Al )  y = 0.02375        Required,                          Mass of Al…

Q: I want to know at least some reason why the mass of the Mgo formed could be lower that expected

A: Interpretation -  To tell about a reason why the mass of the MgO formed could be lower that expected…

Q: Determine the mass in grams of 7.06 × 10²¹ atoms of barium. (The mass of one mole of barium is…

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Q: Determine the mass in grams of 5.79 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: Given no. Of atoms of barium = 5.79 x 10²¹  1 mole of barium = 137.33 g

Q: Naturally occurring elements are originally formed: O A. Inside the core of stars, or when stars…

A: Naturally occurring elements as the name suggest, it is formed naturally not by any man made actions

Q: 15 How many atoms of Aluminum are in 6.95 moles of Aluminum?

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Q: In a mass spectrometry experiment, the instrument senses the of particles traveling from the…

A: We have to predict the correct option for particles .

Q: An unknown element (Uk) has three isotopes, seen in the table. One of the percentage values is…

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Q: An 0.355 mol sample of a metal has a mass of 24.75 g. What is the mass of one atom of the element?…

A: Given: Moles of metal = 0.355 mol. And the mass of metal sample = 24.75 g.

Q: Fusion is cool, small things come together and make bigger things. For example, if two carbon-12's…

A: Atomic No. of carbon is :- 6 Mass of C-12 carbon is :- 12 Atomic no. Silicone is :- 14 Mass  of…

Q: Determine the mass in grams of 4.65 × 1221 atoms of barium. (The mass of one mole of barium is…

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Q: Calculate the number of atoms in sample. 39.733 g S

A: Given, Mass of Sulfur = 39.733 g

Q: How many atoms of He can a balloon that has a 15 cm diameter hold? The density of Helium is 1.18…

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Q: The element argon has three isotopes and an average atomic mass of 39.948 u. Idenitfy the most…

A: Element Ar having three isotopes one is Ar-36, second is Ar-38 and last one is Ar-40  Ar-36 have…

Q: An ambitious student decides to count potassium atoms. He counts 2.01 * 10 to the 23rd power atoms…

A: Using the concept of avogadro number , and no. Of moles we can solve this problem.

Q: A mixture of Thallium was made that contained 60.0 % 203TI and 40.0% 205TI. The mass of 203TI and…

A: Given, Percentage of the abundance of 203Tl isotope = 60% Mass of 203Tl isotope = 202.97 amu…

Q: Why are there no atoms of elements that have masses as stated on the periodic table?

A: In modern periodic table elements are arrangement based on their electronic configuration or atomic…

Q: the isotope Si-28 has a mass of 27.977amu .Calculate the number of moles in 14 grams of Si-28

A: We will use the formula to calculate number of mole Number of moles = Weight (g) / Molar mass Molar…

Q: Mercury has an atomic number of 80 and an atomic mass of 200. Mercury has number of protons, number…

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Q: Calculate the number of atoms in sample. 0.082 g Sr

A: given sample is 0.082 g of Sr we know 1 mol has 6.022 × 1023 atoms

Q: Determine the mass in grams of 5.66 × 10²¹ atoms of barium. (The mass of one mole of barium is…

A: Given,

Q: Calculate the mass

A: At NTP, temperature T1 = 293.15 K Volume, V1 = 24.04 L Temperature, T2 = 30 ◦C or 303.15 K Volume,…

Q: 16. While cleaning your attic, you find your old mass of 11.3 collection? and the rest of mass of 82…

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Q: What is the representative particle, mass(g), no. of particles of carbon dioxide

A: 1mole of any substance contains 6.023*1023 molecules or particles, it is also called one avagadros…

Q: Sample of zinc contains 2,5 moles of zinc atoms. The mass of the zinc sample is.. a. 164,575g b.…

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.