Answer:
Respiration is considered as exothermic reaction because energy is released in this process. Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.
Explanation:
Good Luck!
Answer:
a 1 doesn't belong
Explanation:
Gas has fast moving molecules.
Liquids have slow moving molecules.
Solids have vibrating molecules.
The First option may be correct. Im deeply sorry if im wrong!
FIRST OPTION (A)(1)
1) Determine the number of moles of chlorine gas
At STP 1 mol = 22.4 liter
=> [1mol/22.4 liter] * 0.050 liter = 0.00223 mol Cl2 (g)
2) Write the balanced equation
<span>4HCl (g) + O2 --> 2Cl2 (g) + 2H2O (g)
3) Write the ratios of the compound on which you are focused.
4 HCl : 2 mol Cl2
Then, 0.00223 mol Cl2 * [4mol HCl / 2 mol Cl2] = 0.00446 mol HCl
5) Use Avogadro's number to find the number of molecules:
0.00446 mol * 6.02*10^23 = 2.68 * 10^21 molecules of HCl
Answer: 2.68 * 10^21 molecules
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