Answer:
0.25 mole of CO₂
Explanation:
We'll begin by calculating the mass of oxygen in 1 mole of carbon dioxide (CO₂). This is illustrated below:
Molecular formula of carbon dioxide
=> CO₂
Mass of oxygen in CO₂ = 2O
= 2 × 16
= 32 g
Thus, 1 mole of CO₂ contains 32 g of oxygen.
Finally, we shall determine the number of mole of CO₂ that contains 8 g of oxygen. This can be obtained as follow:
1 mole of CO₂ contains 32 g of oxygen.
Therefore, Xmol of CO₂ will contains 8 g of oxygen i.e
Xmol of CO₂ = 8/32
Xmol of CO₂ = 0.25 mole
Thus, 0.25 mole of CO₂ contains 8 g of oxygen.
Answer:
Statment 2
Explanation:
This is just an educated guess
The formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide will be the same even if all products and reactants are in the aqueous or in the <span>liquid phase. It is as follows:
</span><span>
H2SO4 + 2NaOH = Na2SO4 + 2H2O</span>
Oxidation is when the overall charge (or oxidation number) increases. The only way to increase an oxidation number is to lose an electron, thereby making the negative charges less. The correct answer is C.
