3.3 moles of sulfur
Explanation:
To find the number of moles knowing the number of atoms we use Avogadro's number to formulate the following reasoning:
if in 1 mole of sulfur (S) there are 6.022 × 10²³ atoms of sulfur (S)
then in X moles of sulfur (S) there are 2 × 10²⁴ atoms of sulfur (S)
X = (1 × 2 × 10²⁴) / (6.022 × 10²³)
X = 3.3 moles of sulfur
Learn more about:
Avogadro's number
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Answer:
In the respiratory system, oxygen is breathed in and carbon dioxide ( a green house gas) is breathed out.
4KO₂ + 2CO₂ → 2K₂CO₃ + 3 O₂
The two chemicals that have a molar ratio of 3:4 is in equation above O₂ and KO₂
<em><u>explanation</u></em>
The molar ratio is the ratio between the amount in moles of two compounds that are involved in a chemical reaction.
In the equation above the mole ratio is determined by examining coefficient ( <em>number in front of the formula</em>)
the coefficient of O₂ is 3 while that of KO₂ is 4 therefore the mole ratio of O₂:KO₂ is 3:4
<h2>T
he mass of a liquid substance affected after it boils : C it stays the same</h2>
Explanation:
Matter
Anything that occupies space and has mass .
The states of matter are :
Solids
Liquids
gases
Interconversion of state of matter
Solid ------liquid -----------Gas
(on heating ) (on heating )
- One state can be changed in to another by changing the condition of temperature , pressure etc .
- When liquid is boiled , it gets converted to gaseous form on heating .The heat supplied to change the state of matter is called latent heat .
- This latent heat , just helps in increasing the spaces between particles and decreasing the forces between them Hence we can say that it helps in changing the state .But it doesn't change the mass .Hence mass of substance remains the same .
- Similarly , gas -----> liquid -----> solid
(on cooling ) (on cooling )
