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bogdanovich [222]
3 years ago
12

Shameeka is studying for an exam. She took the notes below about calcium and chlorine, which are known to form ionic bonds. Calc

ium, which is a metal, donates 2 electrons to chlorine. The individual calcium atoms become ions with a negative 2 charge. The bond between calcium and chlorine makes the atoms stable. Calcium and chlorine attract each other. Which best describes Shameeka’s error? ive got 2 hours so you dont need to rush
Chemistry
2 answers:
rodikova [14]3 years ago
6 0

Answer:

Calcium has a charge of positive 2 not negative

Explanation:

Lisa [10]3 years ago
3 0
Calcium has a charge of positive 2 not negative
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Explanation:


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N2(g) + 3H2(g) →2NH3(g)
monitta

Answer:

2.5 moles of N₂ and 7.5 moles of H₂ entered the reaction

Explanation:

In reaction:

N₂(g) + 3 H₂(g) → 2 NH₃(g)

You can see that the stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) requires the following amounts of reagents and are produced:

  • N₂: 1 mole
  • H₂: 3 moles
  • NH₃: 2 moles

The following three rules can apply:

  • If 2 moles of NH₃ are produced from 1 mole of N₂ by stoichiometry of the reaction, 5 moles of NH₃ from how many moles of N₂ are produced?

moles of N_{2} =\frac{5 moles of NH_{3} *1 mole of N_{2} }{2 moles of NH_{3}}

moles of N₂= 2.5

  • If 2 moles of NH₃ are produced from 3 moles of H₂ by stoichiometry of the reaction, 5 moles of NH₃ from how many moles of H₂ are produced?

moles of H_{2} =\frac{5 moles of NH_{3} *3 mole of H_{2} }{2 moles of NH_{3}}

moles of H₂= 7.5

<u><em>2.5 moles of N₂ and 7.5 moles of H₂ entered the reaction</em></u>

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A. the rock is more dense than the cube
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