With the advent of techniques such as scanning tunneling microscopy, it is now possible to “write” with individual atoms by manipulating and arranging atoms on an atomic surface.(A) If the image is prepared on a platinum surface that is exactly 20 platinum atoms high and 14 platinum atoms wide, what is the mass (grams) of the atomic surface? Show all work. [2](B) If the atomic surface were changed to ruthenium atoms and the same surface mass as determined in part (B) is used, what number of ruthenium atoms is needed to construct the surface? Show all work. [2]

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Q: 6. A combustion reaction occurs when decane, C10H22(7), is burned in the presence of oxygen gas to…

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Q: Wine open to the air turns sour over time due to oxidation of ethanol (molar mass 46 g/mole) to…

A: Since from the first reaction step we can see that 2 moles of ethanol is producing 2 moles of…

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Q: Which one of the following statements is true  Mg(s) + 2 HCl(aq) → MgCl₂(s) + H₂(g) A) Mg is the…

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Q: and water. Write the balanced chemical equ

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Q: Aluminum and iodine are both ground into a fine powder and combined in a heatproof dish where a…

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Q: The radius of an Al atom is 0.143 nm. How many Al atoms would have to be laid side-by-side to give a…

A: We know that,    1 meter = 100 Cm  1 nanometer = 10^-9 meter  1 inch = 2.54 Cm

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A: The explanation is given below-

Q: s)+2H,0(g)→C,H,(9)- nd step, acetylene, carbom

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Q: equation: Al,0,(s) + 6NaOH(1) + 12HF(g) → 2Na, AlF, + 9H,O(g) If 15.2 kg of Al,0,(s), 55.4 kg of…

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Q: write a balanced chemical equation

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A: This question is based on the general chemistry. The balanced chemical reaction is, 2C2H2 + 5O2…

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Q: Be sure to answer all parts. Nitroglycerin (C;H;N3O9) is a powerful explosive. Its decomposition may…

A: The decomposition reaction of nitroglycerine is as follows: 4C3H5N3O9 → 6N2 + 12CO2 + 10 H2O + O2…

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A:

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.