One mole (molecular equivalent) of gold has a mass of 196.9655 g.  One mole of anything equals 6.022 x 1023 items of that thing, so in 1 mole of gold there are 6.022 x 1023 atoms.  The diameter of a gold atom is 3.58 x 10-10 m.  If a block of gold of a mass of 202.5 g is drawn into a very thin wire of single gold atoms laid end to end, how long would the wire be?  Express your answer in kilometers.

Q: Matter is made up atoms, but in a real chemistry lab, we measure substances in grams. Therefore you…

A: Consider the given information about quartz is as follows; One molecule of quartz contains = 1 atom…

Q: 2. The approximate radius of a nucleus, r, is given by the formula r = A$(1.3x10-13cm), where A is…

A: Given: Atomic radius of Al = 143 pm Radius of nucleus=A13(1.3×10-13) cm

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: Suppose you have a sodium sample weighing 11.42 g. What mass of potassium would you need to have the…

A: Given, Mass of Na =11.42 g

Q: a) How many electrons are necessary to produce a charge of -1.2 C? Express your answer using two…

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Q: b. 3.01 x 1023 atoms of Rubidium c. 8.08 x 1022 atoms of Krypton d. 2.997 x 1025 atoms of Vanadium

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Suppose you are given 2.50x 104 pg of aluminum sulfate, Al(SO4)ls (s) (density = 2.672 g/cm³) a. How…

A: a) In the first problem we need to find out the number of oxygen atoms present in the given sample.…

Q: On a periodic chart of the elements, molar mass (M), also called atomic weight, is often listed as…

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: Which of the following samples of gases contains the greatest number of atoms? (Relative atomic…

A: 4th option is correct that is 13.0 g of C2H6

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm³. How many…

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Q: (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a aluminum atom…

A:

Q: (a) In the certain hydrated salt MSO34H2O, the mass percentage of H2O is 44.71%. Identify the…

A: The question is based on the concept of  Stoichiometry. we have been given a hydrate salt. we know…

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

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Q: The number of O atoms in 1 mole of NO2 is A. 2 B. 1.204 x 1023 C. 6.02 x 1023 D. 1.204 x 1024

A: A mole of substance can be defined as a substance which contains exactly 6.022×1023 atoms,…

Q: In the ammonia (NH) molecule of the figure, the three hydrogen (H) atoms form an equilateral…

A: You can find the center of mass of the 3 Hs first, then find the center of mass between that point…

Q: The chemical formula for the amino acid glycine is CHŞNO2. Which of the following statements about…

A: Which of the statement is false ?

Q: Need help

A: The mass of water in oxalic alumina is determined as,

Q: What would the mass be of Gold, if you had 6.02 x 10^24 atoms of

A: GOLD, molar mass of Au = 196.97 g/mol atoms of Au = 6.023 x 1023

Q: When a chemical reaction occurs, atoms rearrange to form new compounds, but no new atoms are created…

A: Figure shows A is single element. There are 4 A atoms present in the reactant side. B is diatomic…

Q: A sample of calcium nitrate crystal hydrate with its mass of 1.1808 g was heated at 150oC resulting…

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Q: (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a vanadium atom…

A: (a)Calculate the radius of vanadium atom in centimeters and meters:

Q: White phosphorus consists of a molecule made up of four phosphorus atoms. It burns in pure oxygen to…

A: The given balanced chemical equation                                               P4…

Q: A 2.62 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.59 x 1022…

A: Given  (a)   Mass = 2.62 gram       Number of molecule of N2O  =  3.59 × 1022 molecule       Number…

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: How many copper atoms are present in a 2017 penny with mass 3.10 g? Modern pennies are 97.5% Zn and…

A: we have a penny of mass 3.10 gram. and it's also mentioned that in  a modern penny the percentage of…

Q: What is the average mass of a single phosphorus atom in grams? mass: TOOLS x10

A: The atomic weight of Phosphorus atom (P) = 30.974 g/mol  1 mol means 6.022 × 1023 atoms  ? mol means…

Q: 1. A mole of hydrogen gas (H₂) is compared with a mole of lead (Pb). You can be certain that the…

A: One mole represents 6.023 x1023 particles. So, one mole of a substance = 6.023 x1023…

Q: 6. This Magnesium top by ForeverspinTM weighs merely 6g. a) Write the weight of this top in…

A: The question is based on mole concept. We have to determine number of particles present in 6 gram of…

Q: Atoms are the smallest spherical particles that make up any matter. If 6.0x1023 atoms of aluminum…

A: Step : 1            Calculate the mass of 1 atom of aluminium in picograms.

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54, (53.94 amu), 5® 26FE (55.93…

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Q: Although carbon-12 is now used as the standard for atomic weights, this has not always been the…

A: The atomic weights of H and O are 1.00794 g and 15.9994 g respectively. Weights of atoms are…

Q: (a) In the certain hydrated salt MSO3⋅4H2O, the mass percentage of H2O is 44.71%. Identify the…

A: Hydrated Salt -  It is a crystalline salt to which water molecules are loosely bound.  Molar mass of…

Q: hydrated salt MSO3⋅4H2O, the mass percentage of H2O is 44.71%. Identify the element M in the salt?…

A: Consider a solution consisting of A and B Then, percent of A = (Mass of A x 100)/ Mass of (A + B)

Q: 1) What is the mass in grams of 6.86x10^23 atoms of manganese? 2)How many manganese atoms are there…

A: 1)  Number of moles of manganese = number of atoms (given) / number of atoms in 1 mole number of…

Q: sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?  [Molar…

A: Given that: Molecules of Al = 2.91×1022 atoms  Molar mass of Al = 26.98 g/mol  1 mol = 6.023×1023…

Q: (a) Atoms are very small compared to objects on the macroscopic scale. The radius of a nickel atom…

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Q: Part B Magnesium makes up 2.10 % by mass of the Earth's crust. How many grams of magnesium are…

A: Mass percent :-  The mass of a component in grams present in 100 grams mixture of all components is…

Q: 4. . Which is NOT TRUE about the Law of Conservation of mass? O The number of atoms before and after…

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Q: A macromolecule has an empirical formula of C4H306. The molecular mass for the macromolecule is…

A: Given :- empirical formula of macromolecule = C4H3O6  Molecular mass of macromolecule = 429.21 g/mol…

Q: An alcohol is 58.80 % C and 9.889 % H by mass. The rest is oxygen. What is the empirical formula of…

A: We can find the empirical formula of the alcohol using the given percentages of the element. Since…

Q: Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A…

A: Given data is: Length of plate = 15.0 cm Width of the plate = 12.5 cm Thickness of plate = 3.00 mm…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A: The question is based on mole concept. We have been given diameter of the silicon atom. we have to…

Q: Hydrogen peroxide (H2O2) is a mild antiseptic used to prevent infection in minor cuts and scrapes.…

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Q: 1 gram of sulfur 0.5 gram of sulfur 2 moles of suilfur 6.02 x 1023 atoms of sulfur

A: 1 mole of substance = 6.022 × 10²³ atoms Mass of 1 mole of substance is equal Molar mass of the…

Q: White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm3. How many…

A: Given : Density of silica = 2.20 g/cm3  And diameter of grain of sand = 0.455 mm

Q: you have 13.02 x1023 atoms of nitrogen, what would you expect its mass to be?

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Q: Find the mass of 2.45 X 1023 molecules of Ca(OH)2? Use: Ca = 42.0g, H = 1.25g and O = 15.7g as…

A:

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".