Answer: A metallic bond is a type of chemical bond formed between positively charged atoms in which the free electrons are shared among a lattice of cations. In contrast, covalent and ionic bonds form between two discrete atoms. Metallic bonding is the main type of chemical bond that forms between metal atoms.
Explanation:
NOT MY WORDS! I HOPE THIS HELP!!!!!
The density of helium is 10 ^-3g.cm^-3
Initial buret reading means the volume of acid taken in the buret and final reading means the remaining volume of acid after experiment
If my understanding is correct, what this saying is referring to is the conversion of energy from relatively useful forms to heat energy (which is relatively useless).
As you probably know, conservation of matter says that matter can be neither created nor destroyed. You may also be aware of the conservation of energy, which states that energy can be neither created nor destroyed, but only converted from one form to another. Whenever you have a chemical process, a complicated process called entropy is what drives the process (you don't need to know exactly what this is, but if you want to, you can look up the second law of thermodynamics). Part of that process often involves energy being converted to different forms--from useful forms (that can do work) to useless forms (that can't do work). Useful forms of energy are "useful" because they can do work, and in the process are converted to heat, which is not very useful for work, and generally cannot be converted back to useful forms. Matter, on the other hand, does not have "useful" and "useless" forms.
2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.
HOW TO CALCULATE MASS:
- The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;
- mass of substance (g) = no. of moles (mol) × molar mass (g/mol)
- However, the number of moles of copper must first be calculated by dividing the number of atoms by Avogadro's number as follows:
- no. of moles of Cu = 2.5 X 10²⁴ ÷ 6.02 × 10²³
- no. of moles = 2.5/6.02 × 10²⁴-²³
- no. of moles = 0.42 × 10¹
- no. of moles = 4.2moles of copper.
- Molar mass of copper = 63.5g/mol
- Mass of copper = 4.2mol × 63.5g/mol
Therefore, 2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.
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