The amounts of gold (Au) in the three gold bullion coins are shown below. Indicate which of the coins contains the smallest and largest amount of gold. Centenario (Mexico), 37.5 g Au Krugerrand (South Africa), 0.158 mol Au Gold Panda (China), 9.17 x 1022 atoms Au

Q: What is the mass in grams of 3.61 x10^23 atoms of copper?     How many copper atoms are there in…

A: The atomic mass of an element is used to determine the number of moles of an element. One mole of…

Q: Calculate the number of atoms in each of the following quantities:  a. 10.8 g boron  b. 20.0 g…

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

Q: How many atoms of copper are in a pure copper penny that weighs 2.15 g? (1 amu = 1.6605 10-24 g)

A: Given that the mass of copper penny is 2.15 g. The number of moles can be calculated using the given…

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

A:

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: 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: 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: What is the amount, in moles, of each elemental sample?a. 11.8 g Arb. 3.55 g Znc. 26.1 g Tad. 0.211…

A: The amount in moles has to be calculated.

Q: Select the set-up for the mass % of fluorine, F, in PF3. O (27/42) x 100 O (9/42) x 100 O (19/50) x…

A:

Q: what is the mass, in grams, of 3.01 x10^23 copper atoms

A: Number of copper atoms = 3.01 × 1023  We need to determine mass of copper.

Q: A given sample of ammonia, NH3, contains 3.75x1024 hydrogen atoms. What is the mass, in grams, of…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: What is the mass of 3.91x1024 oxygen atoms? Select an answer and submit. For keyboard navigation,…

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

Q: . Suppose you have a sample of sodium weighing 14.50 g. What mass of potassium would you need to…

A: Atomic mass of sodium=23 Atomic mass of potassium=39 Number of mole=given mass/molar mass So,…

Q: 1) How many aluminum atoms are there in 3.50 grams of Al,O;? (a) 2.45 x 1022 (b) 2.07 x 1022 (c)…

A: Answer :-  (e) 4.13 × 1022  The aluminum atoms present in 3.50 g Al2O3 = 4.13 × 1022 atom…

Q: 8. A 2.00 g sample of FeF2 x H2O is dried in an oven. When the anhydrous salt is removed from the…

A: Given: mass of FeF2.xH2O=2.00 gmass of FeF2(anhydrous)=0.789 gmolar mass of H2O=18 g/molmolar mass…

Q: What is the mass of a 12.56L sample of carbon dioxide? A. 17.9 g B. 8.9 g C. 4501 g D. 24.7 g

A: 22.4 L of CO2 = 44g 1L of CO2=44/22.4g 12.56 L of CO2= 44*12.56/22.4 12.56 L of CO2=24.7g

Q: Suppose that mercury forms a perfect spherical droplet with a diameter of 5.0 mm. (a) What is the…

A: Density is given by the ratio of mass of the substance to its volume. 1 mole of a substance contains…

Q: What is the edge length (in cm) of a titanium cube that con- tains 2.55 x 1024 titanium atoms? The…

A: Calculate the number of moles as follows, Number of moles =2.41×10246.022×1023=0.4×10=4 moles Now,…

Q: 6. How many oxygen atoms are in 225 g oxygen gas? a. 4.23 x 104 C. 8.47 x 10:+ b. 6.84 x 10²4 d.…

A: The Given amount of oxygen gas O2 = 225 grams        the molar mass of O2 = 32 g/mol To calculate…

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: 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: 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: The number of subatomic particles represented by : Au*+ 197 O 79 Protons, 118 Neutrons, 79 electrons…

A: Applying formula  A=Z+n

Q: In a test of the Law of Multiple proportions, two different compounds composed of elements A and B…

A: For compound X B/A = 2.33/1.00 = 2.33   For compound Y B/A = 5.83/1.00 = 5.83   Divide these two…

Q: 1. What is the mass of 1.53x1024 atoms of helium? grams 2. How many helium atoms are there in 46.4…

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

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: A sample of Cs weighs 99.5 grams. Will a sample of S that contains the same number of atoms weigh…

A: 1 mole of any substance = 6.022 x 1023 atoms (Avogadro number)   No. of moles of a substance can…

Q: Pure gold is usually too soft for jewelry, so it is often alloyed with other metals. How many gold…

A:

Q: Use the conversion factor 1 amu = 1.66054 x 10-24 g to answer the questions. How many atomic mass…

A: Given: 1 amu = 1.66054×10-24 g

Q: The human body contains many elements from the periodic table. It is mostly composed of oxygen and…

A: Mass Of hydrogen = 7.07.0 kg Mass of phosphorus = 0.780.78

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: An atom of copper has a mass about four times greater than that of an atom of oxygen. What choice…

A: Mass of copper atom = 4 x mass of oxygen atom

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

A:

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: The formula for sulfur hexafluoride is . a. How many molecules are in 2.24 grams of sulfur…

A:

Q: How many grams of aluminum are there in (5.21x10^2) grams of Al2(SO4)3 (MM = 342.17 g.mol)?

A: The number of moles of Al2(SO4)3  in the given mass of it can be calculated as: Number of…

Q: . Zinc has 2 isotopes and has an atomic mass of 65.39. one of the isotopes is 64.23amu (26.0%). what…

A: As per our guidelines , we can only solve first question. Please resubmit other questions as next…

Q: 1. The diameter of a neutral Helium atom is about 1 x 102 pm. Suppose we could line up Helium atoms…

A:

Q: What is the mass of one atom of I? O 2.107 x 10 22 8. O 3.443 x 1023 O 4.745 x 10-22 g O 6.641x…

A: To find mass for one atom of an element, divide the atomic mass of an element by avogadro number. It…

Q: Which of the following ideas is NOT part of Dalton's Atomic Theory?

A: Atoms are destroyed during a chemical reaction is not part of Dalton atomic theory.

Q: re the masses of C and H ( in grams)? (MM C = 2.01 g/mol, MMH = 1.008 g/mol) (A) 55.19 g and 10.81 g…

A: Theoretical yield = actual yield/% yield

Q: How many copper atoms would there be in 70.3 milligrams of copper

A: Mass of Cu atom = 1.06 × 10-22g  Molar mass of Cu = 65.55 g/mol  70 mg Cu = 70 × 10-3 g Cu

Q: If 2% of the mass of a human body is calcium, how many kilograms of calcium are there in a 150-pound…

A: • The values provided in the question are:-  i) Mass of a man     = 150 lb      = 150 × 0.454 kg {∵…

Q: What is the mass in grams of 5.40 moles of lithium? 37.5 1.29 none of the above 6.94 3.25 x 1024

A:

Q: if an average fluorine atom has a mass of 3.82 x 10-23 g, what is the mass of a magnesium atom in…

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Q: Gallium Arsenide has a density of 5.32g/cm3 and the chemical formula GaAs. A GaAs piece has a volume…

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Q: A pure copper sphere has a radius of 0.935 in. How many copper atoms does it contain? The volume of…

A: First convert the given radius in inch to cm. 1 inch = 2.54 cm, then Next determine the volume of…

Q: Determine the nuclear composition (number of protons and neutrons) of the following isotopes. (a)…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Bromine (atomic mass 79.904 amu) consists of 2 different naturally occurring isotopes, Br-79 (atomic…

A: .Bromine consist of two isotopes 79Br and 81Br.     79Br⇒78.9193 amu.     81Br⇒80.9163 amu…

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.