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brilliants [131]
2 years ago
8

Which of the following is an element? A. Steel B. Sodium chloride C. Fire D. Carbon

Chemistry
2 answers:
Vikki [24]2 years ago
8 0

Answer:

<h3><em>Which of the following is an element?</em></h3><h3><em>=</em><em>⟩</em><em>C</em><em>a</em><em>r</em><em>b</em><em>o</em><em>n</em><em> </em><em>is </em><em>an </em><em>element</em><em> </em><em>.</em></h3>

<em>Explanation</em><em>:</em><em>-</em>

  • <em>Carbon</em><em> </em><em>is </em><em>an </em><em>element</em><em> </em><em>having</em><em> </em><em>atomic </em><em>number</em><em> </em><em>6</em><em> </em><em>and </em><em>atomic</em><em> </em><em>mass</em><em> </em><em>1</em><em>2</em><em> </em><em>.</em>
  • <em>c </em><em>is </em><em>the </em><em>symbol</em><em> </em><em>to </em><em>represent</em><em> </em><em>carbon </em><em>.</em>

<em>hope </em><em>it</em><em> </em><em>is </em><em>helpful</em><em> to</em><em> you</em>

Kisachek [45]2 years ago
6 0
Carbon is the answer D
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When Niels Bohr refined the model of an atom,what new idea did he include?
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Niels Bohr, refined the model of an atom by proposing a quantized shell structure atomic model in order to describe how the electrons are able to maintain stable orbits around the nucleus

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When NH3(g) reacts with N2O(g) to form N2(g) and H2O(g), 105 kcal of energy are evolved for each mole of NH3(g) that reacts. Wri
Ganezh [65]

Answer : The balanced chemical equation is,

2NH_3(g)+3N_2O(g)\rightarrow 4N_2(g)+3H_2O(g)+210kcal

Explanation :

Balanced chemical equation : It is defined as the number of atoms of individual elements present on the reactant side must be equal to the number of atoms of individual elements present on product side.

The given unbalanced chemical reaction is,

NH_3(g)+N_2O(g)\rightarrow N_2(g)+H_2O(g)+105kcal

This chemical reaction is an unbalanced reaction because in this reaction, the number of atoms of individual elements are not balanced.

In order to balanced the chemical reaction, the coefficient 2 is put before the NH_3, the coefficient 3 is put before the N_2O\text{ and }H_2O and the coefficient 4 is put before the N_2.

The energy evolved in this reaction = 105Kcal\times 2=210Kcal

Thus, the balanced chemical reaction will be,

2NH_3(g)+3N_2O(g)\rightarrow 4N_2(g)+3H_2O(g)+210kcal

7 0
2 years ago
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