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pentagon [3]
3 years ago
15

1. Johan started attending swimming lessons. On the first day, he

Chemistry
1 answer:
Anton [14]3 years ago
8 0

Answer:

He jumped the wrong way

Explanation:

The way you jump effects the body like diving will have little or no effect but jumping like a total idiot will have severe or even fatal effects

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2. Which of the following is true about the total number of reactants and the total number of
Soloha48 [4]

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.

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Moles brainly.com/question/2272966

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What is the correct formula for combining Mg2+ and Br1+
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Answer: The correct formula is MgBr_2

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here magnesium is having an oxidation state of +2 called as Mg^{2+} cation and bromine Br^{-} is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral MgBr_2.

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

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How many moles are in 12.5 g ammonium chloride
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Answer:

0.233682161601125

Explanation:

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