The answer is the second one
The law of conservation of mass states that mass cannot be created or destroyed. It can only be transformed/transferred from one form to another.
Answer:
52.0004 grams of mass of potassium superoxide is required
Explanation:
Let moles carbon dioxide gas be n at 22.0 °C and 767 mm Hg occupying 8.90 L of volume.
Pressure of the gas,P = 767 mm Hg = 0.9971 atm
Temperature of the gas,T = 22.0 °C = 295.15 K
Using an ideal gas equation to calculate the number of moles.
n = 0.3662 mol
According to reaction, 2 moles of carbon-dioxide reacts with 4 moles of potassium superoxide.
Then 0.3662 mol of of carbon-dioxide will react with:
of potassium superoxide.
Mass of 0.7324 mol potassium superoxide:
0.7324 mol × 71 g/mol = 52.0004 g
52.0004 grams of mass of potassium superoxide is required.
Answer:
46.76 g
Explanation:
The reaction that takes place is:
First we <u>determine the limiting reactant</u>:
1.3 moles of SiO₂ would react completely with (3 * 1.3) 3.9 moles of C. There are not as many C moles, meaning that C is the limiting reactant.
Now we<u> convert C moles (the limiting reactant) into CO moles</u>, using <em>the stoichiometric coefficients</em>:
- 2.5 mol C * = 1.67 mol CO
Finally we <u>convert 1.67 moles of CO to gram</u>s, using its <em>molar mass</em>:
- 1.67 mol CO * 28 g/mol = 46.76 g
The nucleus is often the largest organelle in a cell. It contains information a cell needs to function. Some of the information is translated by ribosomes, tiny structures located in the cytoplasm and the endoplasmic reticulum. ribosomes use the information to build important molecules called proteins.