Chemistry Questions and Answers (Q&A)

The heat capacity of the metal is affected by a couple of things. First, the water is going to cool it off. There is no getting around that. By doing that, the water gains the heat that it has taken from the metal. The previous answer says that it is 0.25 J/g/C. There’s a formula to...Read More

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The correct answer to this question is B, chordate. It is apart of the kingdom animalia and apart of the subkingdom eumetazoa. It also belongs to the subgroups cephalochordata, olfactores, and vetulicolia. Chordates are defined by five features, including a dorsla nerve cord, notochords,...Read More

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A. A combination reaction is when two compounds combine to form a single one. A displacement reaction would cause one element to push out or displace another element. And take its place. This type of chemical reaction would be shown as A+ BC= B + AC. A decomposition reaction would be one where...Read More

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Because a tin plate is dense and resistant to prevent further oxidation, if you take a noncorroding material, such as brass and scratch away some of the surface exposing new material, then the oxide layer closes up immediately and helps protect the material. If iron is a contact with a more...Read More

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The correct answer is option D
First, let’s calculate the mass of water
Mass of water = 295ml 0.997g/ml
= 294 g
To calculate % by mass of potassium nitrate in the solution
% by mass = (45 100) / (45 + 294)
= 13.3%
Hope you find this helpful

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Due to the formation of ironoxide is this answer suits for first option

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The answer to this is letter A. In order to find the answer, you can just refer to the numbers given plus the given reaction. These will be your clues about what you should do to solve this. It can be confusing for a lot of people especially when the answers can be positive or...Read More

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This has to be methane since there is only 1 carbon.

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