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Nanoparticle was synthesis from silver atoms with 1.8 nm of diameter. Find the ratio of the surface atoms of this particle.
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- Copper: (a) Suppose you have a cube of copper metal that is 0.236 cm on a side with a mass of 0.1206 g. If you know that each copper atom (radius = 128 pm) has a mass of 1.055 1022 g (you will learn in Chapter 2 how to find the mass of one atom), how many atoms are there in this cube? What fraction of the cube is filled with atoms? (Or conversely, how much of the lattice is empty space?) Why is there empty space in the lattice? (b) Now look at the smallest, repeating unit of the crystal lattice of copper. Knowing that an edge of this cube is 361.47 pm and the density of copper is 8.960 g/cm3, calculate the number of copper atoms in this smallest, repeating unit.Calculate the radius in nanometers of a metallic atom given that it has a BCC structure and a density of 12.52 g/cm3 and an atomic weight of 105.68 g/mol. NA = 6.022 x 1023 atoms/mol. Express your answer in three decimal places only. Do not put the units.Calculate the radius in nanometers of a metallic atom given that it has a BCC structure and a density of 11 g/cm and an atomic weight of 108.1 g/mol. NA = 6.022 x 1023 atoms/mol. Express your answer in three decimal places only. Do not put the units.
- A new compound has the empirical formula GaCl2. Thissurprises some chemists who, based on the position of gallium in the periodic table, expect a chloride of gallium to have the formula GaCl3 or possibly GaCl. They suggest that the “GaCl2” is really Ga[GaCl4], in which the bracketed group behaves as a unit with a -1 charge. Suggest experiments to test this hypothesisCalculate the densHy of Zinc using the atomic masS Gf Zinc and W dimensions of 3.5 x 2.5 x 2.5mmWhy must atomic masses be weighted averages rather than conventional average values?
- student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…Calculate the percent error between your average experimental value and theoretical value for the mass percent of oxygen in KClO3. Show your work clearly. TV = 39.165% EV = 40.767%Write balanced complete ionic equation for CaS(aq) +CdCl2 (aq) → CdS(s) + CaCl (aq). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ You have already submitted thin
- Since ore can contain copper and other minerals, what imaging technique can you use that can determine the elemental composition of elements and how the elements in the ore are being distributed? Explain how this imaging technique works.What steps do I take to convert 97.0111 x 1014 nm3 to cL?A 0.400-g sample of Niobium(IV) oxide is reacted with oxygen gas, yielding 0.4256 g of a new compound, NbxOy. Write a balanced chemical equation for this reaction (include state symbols to indicate whether each compound is solid, gas, liquid, etc.). You may write your coefficients in terms of x and y. What is the molecular formula of the new compound (that is, what are the values of x and y)?
