In order to determine the number of molecules of nitrogen dioxide that are in 1.28 g of nitrogen dioxide, we first need to know these values:
Molar mass of nitrogen dioxide = 46.0055 g/mol
Avogadro's number = 6.022 x 10^23 molecules/mol
Then, we divide 1.28 g by the molar mass and multiply the resulting value to Avogadro's number:
1.28 g/ 46.0055 g/mol x 6.022 x 10^23 molecules/mol = 1.6755 x 10^22 molecules of nitrogen dioxide
(D) Decreasing the particle size of the CacO, by grinding it into a fine powder
Explanation:
To produce more gases by increasing the rate of the chemical reaction, if we grind the chalk into powder, this should walk.
The rate at which chemical reactions takes place is a measure of the speed of the reaction.
Some factors control the rate of chemical reactions. They are:
- Nature of reactants
- Concentration of reactants or pressure if gaseous.
- Temperature
- Presence of a catalyst
- Sunlight
The most applicable in this scenario is grinding the chalk into fine powder. This process increases the surface area exposed. Surface area exposed proportionally affects the rate of a reaction.
Learn more:
Surface area brainly.com/question/9666705
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Answer:
d.- The model does not provide information about the type of rock in which fossils form.
Explanation:
The fossils can be located in different parts like on land, shore and water. But, they were formed at different time, that means, they live in different ages, that is the reason why the model need to include the type of rock. Remember fossil form at different ages and with the pass of time different layers of rock formed.
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