How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

Q: Zn+ 2Au(CN)2 → Zn(CN)4+ 2Au What mass of gold would you expect to recover from 2.50x105 gr

A: Zn+ 2Au(CN)2 → Zn(CN)4+ 2Au2 mol  Au(CN)2 produces  2 mol Autherefore,2 g ×Au(CN)2 produces = 2 g…

Q: what is the weight in grams of 4.30 x 10^14 CF4 molecules?

A:

Q: Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of…

A: Given,  Formula of hydrate copper(II) chloride = CuCl2.xH2O Mass of crucible = 16.221 gMass of…

Q: 19.78 mL of bromine contains 6.022 x 1023 bromine molecules. How many bromine atoms are in 3.00 L of…

A: Given -> Volume (V1) = 19.78 ml = 0.01978 L (1L = 1000 ml) Number of bromine molecules in V1=…

Q: What is the number of Carbon atoms in this chemical formula?   C_{11}H_{24}

A: The chemical formula is used to represent a compound. The given chemical formula of the compound is…

Q: A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. How many grams of…

A: The question is about calculating the mass of Nitrogen in a 169 g sample of the substance -

Q: We have 425 cm3 of a material. How many g is it? The material has density of 0.345 g/cm O 68.0 g O…

A: We have to find mass ,volume and density  is given in the question  Volume of the material = 425 cm3…

Q: What is the mass of 3.119 moles of Ca(OH)2? a.  231.1 g b. 462.1 g d. 74.10 g c. 4.209 x 10^-2 g

A: Given, moles of Ca(OH)2 = 3.119 moles. We have to calculate how many grams of Ca(OH)2 are present…

Q: 3. A sample of sugar, C.H12O6, has a mass of 90.0 g. It has the same number of molecules as A) 45 g…

A:

Q: Lithium carbonate, Li2CO3, contains 18.8 % lithium and is used in the treatment of mental illnesses…

A: Given : mass percent of lithium in Li2CO3 = 18.8 %. And mass of Li2CO3 sample = 1.48 g

Q: Which sample contains the greatest number of atoms? 54.7 g V 51.2 g Mn 203 g Bi

A: To find number of atom we have to calculate number of moles first. Moles= given mass/molar mass…

Q: Element X forms three different compounds with element Y. Information about these compounds is…

A: We have to predict the formula for the other two compounds.

Q: A compound of iodine and cesium contains 63.94 g of metal and 61.06 g of nonmetal. How many grams of…

A: Given: Mass of metal= 63.94g Mass of nonmetal= 61.06g Mass of compound= 38.77g To find: Mass of…

Q: What is the mass of 3.30 × 10 ²³atoms of silver, Ag? (Sec. 8.4) (a) 0.549 g (b) 25.8 g (c) 59.1 g…

A: The atomic mass of an element will be equal to the Avogadro number of particles ( be it atoms,…

Q: chemical formula

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Q: Atoms are the smallest spherical particles that make up any matter. If 6.0x10^23 atoms of aluminum…

A: Avogadro’s number is used to determine the number of atoms present in 1 mol of an element.…

Q: A student is running an experiment in which 48.1 grams of MgBr2 is needed, but the only jar of…

A: Given Mass of MgBr2 needed = 48.1 g

Q: Drag conversion units onto the boxes in the equation to make conversions. Some boxes can be left…

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Q: 8. Given what you know about the law of conservation of mass, fill in the missing mass below. D0.…

A: law of conservation mass said that mass is conserved during a reaction or any physical changes…

Q: A 4.450 g sample of hydrated lithium iodide, LiI·xH2O, is dried in an oven. When the anhydrous salt…

A: The water of crystallization is having a fixed number of water molecules present in one formula unit…

Q: Which one contains more oxygen atoms? 22 grams of carbon dioxide or 18 grams of water?

A: Given: Mass of carbon dioxide (CO2)=22 g Mass of water (H2O)=18 g To find: which contains more…

Q: A 37.99 gram sample of a hydrate of COCL2 was heated thoroughly in a porcelain crucible, until its…

A: Given mass of the hydrated sample of CoCl2=37.99 grams. Give mass of anhydrous sample of CoCl2…

Q: One mole of iron contains 6.022 x 1023 grams of Fe. True False

A: One mol of any substance has mass equal to its molar mass and contain atoms equal to the Avagadro's…

Q: The mass of Cu (63.55 g/mol) used to create Cu2S was 16.95 grams. what theoretical mass of Cu2S…

A:

Q: F. How many oxygen molecules are in 2.40 g of O2(g)? A: 4.52 x 1022

A: Given : Mass of O2 = 2.40 g

Q: 1. How many grams are present in 12 atoms of Potassium? a. 7.8 grams b. 3.91 x 10-22 grams 39.1…

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Q: What mass of ZnCO3 contains 3.11x1022 O atoms?

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Q: A 150.0 gram sample of a white powder contains 61.05 g of carbon, 7.65 g of hydrogen, and 81.30 g of…

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Q: 16. While cleaning your attic, you find your old rock collection. If 74.2% of the rocks have a mass…

A: If a substance is present in more than one form then average mass of that substance given by…

Q: what is the mass in grams of 1.49 x 10^17 chromium atoms?

A:

Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

A: Interpretation-  To determine the carbon atom in the give molecule C3H8 - To determine the total…

Q: What is the mass in grams of 1.37 x 10^24 atoms of nickel? ______ grams How many nickel atoms are…

A: Calculate mass and number of atoms of Nickel in the given data in the question---  Value--  Avogadro…

Q: What is the mass of magnesium fluoride that contains 7.29 × 1024 F atoms?   Relative atomic…

A: Given,  The mass of magnesium fluoride that contains 7.29 × 1024 F atoms is:

Q: 55: A sugar crystal contains approximately 1.8*107 sucrose (C12H22011) molecules. What is its mass…

A: To calculate the mass from molecules, we need to calculate the number of moles of a substance in the…

Q: How many atoms are contained in a block of aluminum metal measuring 6.0 mm x 5.0 mm x 15 mm? The…

A:

Q: What is the mass, in grams, of 5.23 moles of oxygen gas?

A: Number of moles of the substance is the ratio of mass to molar mass.

Q: A sulfur dioxide gas sample has a volume of 242.62 mL at 242279 pascals and 82.99oF. Calculate the…

A:

Q: What is the mass in grams of 1.75 x 10^24 atoms of silicon? grams How many silicon atoms are there…

A: a) To determine the mass in grams of silicon which is present in 1.75×1024 As 6.022 ×1023 atoms are…

Q: The density of MgO is 3.6 g/cm3. The atomic masses of magnesium and oxygen are 24.31 g, and 16 g,…

A: Given that Density of MgO = 3.6 g/cm3 Molecular weight of MgO = (1* 24.31) + (1 *16) = 40.31 g/mol

Q: Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of…

A:

Q: If 81.17 grams of aluminum and 72.03 grams of the iron oxide are used, what mass of iron was…

A: Mass of Iron produced depends on limiting reagent.

Q: You wish to prepare 207 grams of 14.7 % Ca(NO3)2. You will need grams of calcium nitrate and mL of…

A: Given mass of solution = 207 gm

Q: t2 = 20.9 Hns typ = 0.603/K k = 0•693 O: 693/20.9 0.693 K = E a.033 br

A: Half life It is the time when the Concentration becomes half of the initial Concentration

Q: How much money, in dollars, does one mole of nickels represent?   If this amount of money were…

A: A Nickel is a currency coin mainly used in United States of America. The value of one nickel coin is…

Q: How many grams of Mg2+ are present in 3.80 grams of magnesium oxide?

A: The chemical formula of magnesium oxide is MgO.

Q: What mass of oxygen is present in 10.0 grams of potassium nitrate (KNO3)?

A: Mass of KNO3 = 10 g Molar mass of KNO3 = 101.1 g/mol

Q: A 3.69 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.05 x 1022…

A: a.The total number of nitrogen atoms in 3.69g sample of nitrous oxide is calculated as,

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".