C. Single-replacement
Chlorine replaces Bromine in KBr.
Because Air itself is not an element. it is made up by different elements such as Oxygen and nitrogen. since its made up of a mix of different elements, its rather a homogeneous mixture :)
Answer:
the last one is wrong
Explanation:
wrong : most of the mass of an atom comes from the electrons cloud
9 moles of reactants chemically change into 11 moles of product.
Explanation:
In the reaction above, 9 moles of reactants chemically change into 11 mole of products. The coefficients in a reaction is the number of moles of the reacting atoms .
- For example 8O₂ depicts 8 moles of two oxygen atoms.
- The number of moles is a unit for quantifying particles.
- You can liken it to a dozen, gross or a score.
- Since a mole of a substance contains avogadro number of particles. We can relate the number of moles to other parameters.
Learn more:
Moles brainly.com/question/2272966
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