How many gold atoms are in an 0.214-ounce, 18 K gold bracelet? (18 K gold is 75% gold by mass.) Express your answer using two significant figures.

Q: How many molecules of sulfuric acid are in 5.00 g of sulfuric acid? Write your answer with the…

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Q: 15. This ForeverspinTM top os made of pure carbon, with an Atomic Mass of 12. This top weights 9…

A: P

Q: a. What is the mass of 1.49 x 1024 atoms of chlorine? grams b. What is the mass of 9.12 x 1023…

A: a) mass of 1.49×1024 atoms of chlorine.

Q: Calculate the number of nitrogen atoms in a 120.0 g sample of dinitrogen tetroxide (N,04). Be sure…

A: Mass of nitrogen dioxide (N2O4) = 120.0 g  Number of nitrogen atoms = ?

Q: What mass of iron (d = 7.874 g/cm') does a 2.0 in x 1.5 in x 10.0 in sample have?

A: Given  density of Iron = 7.874 gram/ Cm3 Volume = 2.0 inch × 1.5 inch × 10 inch 1 inch   = 2.54 Cm…

Q: Which scale is most useful for reporting data from the spectrometer? Why?

A: The two scales used for analysis in UV spectroscopy is percent transmittance and absorbance.

Q: Calculate the number of nitrogen atoms in a 150.0 g sample of dinitrogen tetroxide (N,04). Be sure…

A: 1 mole=6.023x1023 atoms or ions or molecule .molar mass of N2O4=2 x atomic mass of N+…

Q: carbon

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Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg; (Si,O3), (OH), An…

A: Given the chemical formula: Mg3Si2O52(OH)2 So, there are 3 mol Mg per 1 mol of Mg3Si2O52(OH)2 And,…

Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg;(Si,O3),(OH); An…

A:

Q: A copper atom has a mass of 1.06 x 10 g and a penny has a mass of 2.5 g. Use this information to…

A: Mass of Cu atom = 1.06 × 10-22 g Mass of penny = 2.5 g 1) Mass of 1 mole of Cu atom =? 2) Number of…

Q: Calculate the number of hydrogen atoms in a 70.0 g sample of ammonia (NH3). Be sure your answer has…

A: Given: Mass of NH3 is 70.0 g Molar mass of NH3  is 17 g/mol Atoms in 1 mole is 6.022×1023  To find:…

Q: If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one…

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Q: what is the mass in grams of 125 iron atoms?

A: Given that: Number of iron atoms = 125 Atomic mass of iron =  55.845 g/mol

Q: Calculate the mass (in grams) of 4.69 x 1024 carbon atoms.

A: Given : 4.69 × 1024 carbon atoms.  We know 6.022 × 1023 atoms = mass of one mole

Q: The chemical formula for diethyl amine is: (CH,CH,),NH Calculate the molar mass of diethyl amine.…

A: To calculate the molar mass of diethylamine.

Q: Gold (Au) has a density of 10.046 g/cm3. What is the mass in kg of 1.89 m3 of Au? ***Be sure to show…

A: given , density of gold = 10.046 g/cm3 volume of gold = 1.89 m3

Q: What is the mass in grams of 1.37 × 1016 chromium atoms? Put your answer in box in scientific…

A: Given: Number of chromium atoms, Cr = 1.37 × 1016 atoms.

Q: In the compound CGH1303, what percent by mass is hydrogen? In Na2CO3, what percent (by mass) is C?…

A: Three different questions about finding the percent composition of individual elements in a…

Q: 5 (2.74) The carat is the unit of mass used by jewelers. One carat is exactly 200mg. How many carbon…

A: 1 carat = 200 mg Diamond present = 2.5 carats Molar mass of carbon = 12.01 g/mol

Q: Calculate the molar mass of an element if a 1.20 mol sample of it has a density of 2.18 g/cm3 and…

A: General chemistry.

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

Q: The chemical formula for diethyl amine is: (CH;CH,),NH Calculate the molar mass of diethyl amine.…

A: The chemical formula of diethyl amine is given as (CH3CH2)2NH.

Q: What is the mass, in g, of 2.67 × 10 nickel (Ni) atoms? Enter your answer in scientific notation. 12…

A: The given data contains, Atoms of nickel = 2.67×1012 Molar mass of Nickel = 58.69 g/mol.

Q: Show all your work on a sheet of paper to solve the following problem. Full credit is based upon the…

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

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Q: Calculate the number of oxygen atoms in a 150.0 g sample of dinitrogen tetroxide (N,04). Be sure…

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Q: 5. The term mole is a unit used to represent (1) density of particles (2) an element or compound's…

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Q: What is the mass of 1 carbon atom in grams?  What is the mass of one dozen carbon atoms in grams?…

A: The number of moles can be calculated as- n=mMm=n×M where n: number of moles of the atom m: the mass…

Q: Student K was asked to determine whether his bar was made of pure palladium.  II) Student S was…

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Q: What is the mass in grams of 8.91 × 1016 chromium atoms? Put your answer in box in scientific…

A:

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 there in 77.9 g of selenium? You will need to divide your answer by 1.0X10^23

A:

Q: How many atoms of fluorine are in 1.1E0 moles of CF4? Respond with the correct number of significant…

A: Given, The number of atoms of fluorine are in 1.1E0 moles of CF4 is :

Q: If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one…

A:

Q: O CHEMICAL REACTIONS Interconverting number of atoms and mass of compound Calculate the number of…

A: Mass of forsterite (Mg2SiO4) = 80.0 g  Number of magnesium atoms = ?

Q: In the reaction between 108.6 grams of zinc and 2.69 moles of HCl, what is the maximum mass in grams…

A: The given reaction is,                        Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) Clearly, from…

Q: How do i Complete the following calculation? Determine the number of grams of Carbon in 3.14 x 1032…

A: To get the number of gram calculate mole then with the help of mole calculate mass.

Q: An atom of a particular element has a volume of 7.8 X 10-31 m3. What is this volume in cubic…

A: Find volume of atom in cubic nanometre

Q: Fe2O3 express your answer in atomic mass units to two decimal places

A: Atomic mass unit is a unit which express the relative masses of atoms. One atomic mass unit is equal…

Q: How many grams of rubidium are in 3.49 x 1024 atoms of rubidium? Enter your answer in decimal form…

A: 1 mole atoms = 6.023 * 1023 atoms. molar mass of Rb = 85.4678 gmole  and mass of Rb = mole * molar…

Q: What is the mass in grams of 1.20 × 1014 lead (Pb) atoms? X 10 Enter your answer in scientific…

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Q: What is the mass in grams of 7.70 × 1014 lead (Pb) atoms? × 10 Enter your answer in scientific…

A:

Q: How many atoms of oxygen are in 231.000 grams of lead (IV) oxide? Enter your answer using Canvas's…

A: moles : Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large…

Q: A chemist adds 455.0 mL of a 5.23 mol L silver perchlorate (AgC10,) solution to a reaction flask.…

A: Volume of solution = 455.0mL. Molarity of solution = 5.23mol/L.

Q: How many helium atoms are there in a helium blimp containing 534 kg of helium?   Express the number…

A: Mole= mass/molar mass  Molar mass of Helium =4g/mol So first Calculate mole Then atoms…

Q: How many gold atoms are in a 0.500 ounce, 18 K gold bracelet? (18 K gold is 75% gold by mass.)…

A:

Q: Number of OO atoms in 5.25×10−3 molmol Al(NO3)3Al(NO3)3. Express the amount in atoms to three…

A: Given, 5.25×10−3 mol Al(NO3)3

Q: Enter your answer in the provided box. Perform the following conversion: 2.03 x 105 mol of MgBr to…

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

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".