Response:
9.9 ml of 0.200M NH₄OH(aq)
Reasoning:
3NH₄OH(Iaq) + FeCl₃(aq) => NH₄Cl(aq) + Fe(OH)₃(s)
What volume in ml of 0.200M NH₄OH(aq) will fully react with 12ml of 0.550M FeCl₃(aq)?
1 x Molarity of NH₄OH x Volume of NH₄OH Solution(L) = 2 x Molarity of FeCl₃ x Volume of FeCl₃ Solution
1(0.200M)(Volume of NH₄OH Soln) = 3(0.550M)(0.012L)
=> Volume of NH₄OH Soln = 3(0.550M)(0.012L)/1(0.200M) = 0.0099 Liters = 9.9 milliliters
Answer:
Explanation:
The percent composition indicates the mass percentage of a specific element within the compound.
The chemical formula for chromium(III) nitrate is
.
The molar mass for chromium(III) nitrate is calculated at 238.011 g/mol.
Each mole of chromium(III) nitrate includes 9 moles of oxygen.
The molar mass of oxygen is 16 g/mol.
Hence, Mass = Molar mass * Moles = 16 * 9 g = 144 g.
Answer:6.94
Explanation:Atomic mass of Li = 6.94
To find the number of atoms: 12.6 g Li x 1 mole/6.94 g x 6.02x10^23 atom/mole = 1.09x10^24 atoms
The vapor pressure of a substance varies with temperature. To identify which compound has a vapor pressure of 58 kilopascals at 65 degrees Celsius, we consult standard tables that list temperature against vapor pressure.
According to the tables or graphs, the answer is:
<span>2. ethanol</span>
D.) Gas X possesses a lower density and effuses more quickly than Gas Y.
Explanation:
Gas X has a lower molar mass compared to Gas Y, and the density of a gas is directly proportional to its molar mass. Therefore, it has a lower density than Gas Y. Thomas Graham discovered that, under constant temperature and pressure, the effusion rates of various gases are inversely related to the square root of their molar masses (M). Consequently, a gas with a lower molar mass will effuse faster than one with a higher molar mass. Thus, Gas X effuses faster than Gas Y.
So, the correct selection is: D.) Gas X has a lower density and effuses faster than Gas Y.