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Kamila [148]
4 years ago
8

What creates the charge in an electrical current?

Chemistry
1 answer:
Natasha_Volkova [10]4 years ago
6 0
Electrons


In electric circuits this charge is often carried by electrons moving through a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionized gas
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Calculate the amount of heat required to completely sublime 66.0 gg of solid dry ice (CO2)(CO2) at its sublimation temperature.
atroni [7]

Answer:

48.5 kJ

Explanation:

Let's consider the sublimation of carbon dioxide at its sublimation temperature, that is, its change from the solid to the gaseous state.

CO₂(s) → CO₂(g)

The molar mass of carbon dioxide is 44.01 g/mol. The moles corresponding to  66.0 g are:

66.0 g × (1 mol/44.01 g) = 1.50 mol

The heat of sublimation for carbon dioxide is 32.3 kJ/mol. The heat required to sublimate 1.50 moles of carbon dioxide is:

1.50 mol × (32.3 kJ/mol) = 48.5 kJ

7 0
3 years ago
How is a compound different from an element 2.3 lesson check?
zavuch27 [327]

<em>Answer:</em>

  1. Element: Element are pure substance consist of same type of atoms
  2. Compound: Form by combination of atoms of different elements.

<em>Distinguish features:</em>

  • Compounds represented by chemical formula while elements are represented by symbols.
  • Compounds have fixed ratios of atoms of different elements while in elements are distinguished by atomic no.
  • Compounds can be converted into simple substance by chemical methods but the elements cant be converted into simpler substance by means of chemical methods.

<em>Example:</em>

  • Water (H2O) is a compounds.
  • Iron (Fe) is an element.

<em>Summary:</em>

  • When two or more elements are mixed then compounds are formed.
4 0
3 years ago
What are the three important things needed for combustion to occur ?
marissa [1.9K]

Explanation:

Here is the answer hope you do well

4 0
3 years ago
The reaction CO2(g) → C(s) + O2(g) is a decomposition reaction.<br><br> True<br> False
Lyrx [107]

  The reaction CO₂(g)  → C(s) +O₂(g)  is  a decomposition  reaction is true

Explanation

 A Decomposition reaction is a reaction in which involve breaking down  a compound into   two or more  simpler  substances.

 The reaction above is a decomposition reaction since CO₂    molecule is broken down  into C (an  element) and O₂  (a  molecule).

4 0
3 years ago
Read 2 more answers
Which statement about the periodic table is true?
dedylja [7]

Answer

Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. ... Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.

8 0
3 years ago
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