Q.27. Find number of aluminum (Al) atoms in a peace of pure (Al) block with dimensions equal to 2.0 cm x 2.0 cm x 3.0 cm. the density of (Al) is 2.7 g/cm.

Q: v, the number of v of Rf is 104 and its v is 267. Therefore the number of protons is One of the…

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Q: The number of atoms in 1 dm3 of aluminum is nearly the same as the number of atoms in 1 dm3 of lead,…

A: Density of a substance is given by the ratio of mass and volume of the substance. Write the…

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: |\ S ১ 0SS 0 ५, ४)0° atonas of gold, Au?

A: As we know that, 1 mole of Ag contains 6.022 × 1023 atoms. Therefore, 4.50 × 1022 atoms will have  =…

Q: One atom of lithium, Li, reacts with fluorine, F, to produce lithium fluoride, LiF2. The atomic mass…

A: Which statement about the reaction is correct?

Q: The "lead" in lead pencils is actually almost pure carbon, and the mass of a period mark made by a…

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Q: Bronze is an alloy with the following composition: Component Copper Nickel Zinc mass percentage 52.0…

A: Given  Mass percentage of Cu = 52%  Total mass of sample     = 2 gram  mass of copper              =…

Q: Variations in average atomic mass may be observed for elements obtained from different sources.…

A: The formula for fractional abundance is, Fractional abundance=0.01×Abundance(%)

Q: Atomic # 7 Atomic # Atomic # Atomic # Atomic Mass 14 Atomic Mass 12 Atomic Mass_40 Atomic Mass 5e 2e…

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Q: Sulfur forms several compounds with fluorine. Upon decomposition, sample one produces 4.45 g of…

A: Given information is:                   Sample 1 →Decomposition F(4.45grams) + S (1.25grams)…

Q: What are the basic units-single atoms, molecules, or for- mula units-that compose each substance?…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: How many atoms of lead are required to cover a 37.0 cm by 55.0 cm area with a sheet of lead that is…

A: The required volume to cover =  37.0 cm×55.0 cm×0.142 cm…

Q: 5 g of anhydrous strontium nitrate is added to a beaker and exposed to air. After several hours the…

A: Given that -  Mass of strontium nitrate =  5 g  Mass of water Increases due to exposed in air = 1.70…

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: A Matter can not be created or destroyed, The mass of the reactants in a ch reaction will equal the…

A: Chemical bond is M Two types of chemical bonds are L Chemical reaction K Reactants F…

Q: The elements nickel (Ni) and boron (B) form two binary compounds with the following compositions:…

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Q: The radius of a rhodium atom is 134 pm. How many rhodium atoms would have to be laid side by side to…

A: We have to calculate the number of rhodium atoms.

Q: An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with mass…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

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: Why must atomic masses be weighted averages rather than conventional average values?

A: atomic mass is mass of atom which have amu unit .

Q: With the advent of techniques such as scanning tunneling microscopy, it is now possible to “write”…

A: Given:Surface is 20 atoms high and 14 atoms wide.Number of Platinum atoms = 20 atoms × 14 atoms =…

Q: compound M2O3 is 30.06% oxygen, where M is an unknow metal. The element represented by M is?

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Q: Lithium metal has an atomic radius of 152 pm. The molar mass of lithium is 6.94 g/mol and Avogadro`s…

A: Atomic radius = 152 pm = 152 × 10-10 cm  Avadagro constant = 6.022 × 1023  per mol  Molar mass of…

Q: Matter is defined as ....... إجابتك Felite is إجابتك

A: 2. The term matter refers to anything that occupies space and has mass—in other words, the “stuff”…

Q: Boron and sulfur form two binary compounds. The first contains 0.2247 g B/1.000 g S, and the second…

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Q: A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and height…

A: Density of a substance is given by the ratio of mass to its volume. Density = MassVolume Volume of a…

Q: A meteorite found in central Indiana contains traces of the noble gas neon picked up from the solar…

A: The average mass of an element can be defined as the sum of each individual isotope's mass…

Q: A t96 gram sample Of Silver reacts With Oxygen To form 8,56 grams of grams Of the metal cadeo What…

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Q: f. CO2H 1. CICOCOCI, NE13; 2. FeCl,, THF/NMP; 3. MgCI H3C, `CH3

A: The carboxylic acid functional group is depicted as R-COOH, where R can be an alkyl or aryl group.…

Q: How many electrons is the element Strontium (Sr) likely to gain or lose?

A: Strontium is represented by Sr. The atomic number of Sr is 38. Sr Electronic configuration = [Kr]…

Q: Complete the table, and then analyze the data to determine if Compounds Iand II are the same…

A: The concentration of a substance can be measured in terms of mass by mass percentage. This…

Q: A bicycle part made of titanium, Ti, has a volume of 32 cm . Titanium has a density of 4.50 g/cm .…

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Q: A hypothetical element, M, with average atomic weight of 35.75. M has three stable isotopes with the…

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Q: Calculate the mass of Cu in g from 8.20 kg CuFeS2

A: From the chemical formula it is clear that 1 mole CuFeS2 contains 1 mole Cu. Molar mass of…

Q: The anticancer drug Platinol (Cisplatin), Pt(NH₃)₂Cl₂,reacts with the cancer cell’s DNA and…

A: The amount of a particular compound present in a solution is expressed by the various concentration…

Q: An unknown metal forms a BCC structure with its side length of 2.884 Å. What is the atomic weight of…

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Q: An aluminum-containing compound has the formula Mg, Al,0, and is 44.98% oxygen by mass. What is the…

A: Given: mass percent of O = 44.98 % Formula of compound: MgxAlyO4 molar mass of O = 16 g/mol molar…

Q: 2 N205 (s) 54 NO, (g) + 02 (g) AG;° (kJ/mol) N2O5 (s) 117.7 NO2 (g) 51.8

A: From the standard Gibbs free energy data □G° = [Total Gibbs free energy of products] - [Total Gibbs…

Q: On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u)…

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Q: 7. A 25.75 g sample of a nitrogen oxide was found to contain 6.68 g nitrogen and the rest oxygen.…

A: Problem 7 % Weight of an element in a compound = 100 x Weight of element/Weight of compound Weight…

Q: Calculate the mass of antimony(III) lodide, Sblg, that can be produced by the reaction of 143 g of…

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

A: Given :- radius of tungsten atom = 137 pm  To calculate :- number of tungsten atoms in 1.99 mm

Q: A 67.2 g sample of a gold and palladium alloy contains 3.07×1023 atoms . What is the mass…

A: Given : Mass of sample = 67.2 g And total number of atoms = 3.07 X 1023 atoms Assuming the moles of…

Q: he image shows a representative sample of 5050 atoms of a fictious element, called lemonium (LeLe).…

A: Given: The atomic mass of Le-19 = 19.0134 u The atomic mass of Le-17 = 17.4629 u The atomic mass of…

Q: 2. The creation of carbon monoxide is an effect. What is one cause? A. the regrouping of the atoms…

A: 2. Operating a stove. 3.  A harmless compound can become harmful when its elements are separated. 4.…

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.