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Yakvenalex [24]
3 years ago
6

11. What is the molarity of a solution that has 0.512 moles of NaCl dissolved in 0.24 L of solution? (Show WORK. Circle the corr

ect answer: 2.1M or 1.2M)​
Chemistry
1 answer:
TiliK225 [7]3 years ago
7 0

Answer:

2.1 M

Explanation:

Molarity is moles per liter:

0.512 mol NaCl / 0.24 L = 2.1 M

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Decide whether a chemical reaction happens in either of the following situations. If a reaction does happen, write the chemical
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Answer: The chemical equations are given below.

Explanation:

A balanced chemical reaction follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.  

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General equation representing single displacement reaction follows:

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The reactivity of metals is judged by the series known as reactivity series. Elements lying above in the series are more reactive than the elements lying below in the series.

  • 1. When solid lead metal is put in the beaker of 0.043 M Fe(NO_3)_2 solution.

Lead lies below in the reactivity series than iron. Thus, it will not replace iron from its chemical reaction.

Pb(s)+Fe(NO_3)_2(aq.)\rightarrow \text{No reaction}

  • 2. When solid iron metal is put in the beaker of 0.044 M Pb(NO_3)_2 solution.

Iron lies above in the reactivity series than lead. Thus, it will easily replace lead from its chemical reaction.

Fe(s)+Pb(NO_3)_2(aq.)\rightarrow Fe(NO_3)_2(aq.)+Pb(s)

Hence, the chemical equations are given above.

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3 years ago
Given that the radius of the helium-4 nucleus is approximately 2.6 fm, the classical electron radius is 2.8 fm, and the calculat
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Answer:

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So, the total radius of the particles is 0.0056 + 0.0026 = 0.0082 pm.

The percentage of the space that the particles occupy is the radius of them divided by the radius of the atom:

% = 0.0082/31 *100%

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no entiendo del todo el inglés

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