Answer:
19.1 mol H2
Explanation:
1. Hello, first you have to propose the chemical equation:
H2 + CO2 = H2O + CO
The equation has to be balanced, it means that the same quantity of atoms must be in the right and left side of the equation.
2. To do the stochiometric calculus, you need to find which one is the limiting reactant, in the problem says that you are working with an excess of carbon dioxide, so the limiting reactant is hydrogen H2:
Limiting reactant: H2
Excessing reactant : CO2
3. With the limiting reactant and the chemical equation, you have to establish the stichometrical relation to calculate the quantity of all reactants and products:
In a base of the chemical equation, and using the limiting reactant:
1 mol H2 = 1 mol H2O
The exercise says that you have 19.1mol of water vapor (H2O(g)), then to calculate the mol of H2 you need, you make the calculus as follow:
19.1 mol H2O ×( 1mol H2/1 mol H2O)= 19.1 mol H2
The exercise completed is in the document attached.
Answer: The correct answer is Option D.
Explanation:
Atomic radius is defined as the total distance from the nucleus to outermost orbital of the electron.
As moving from top to bottom, new shell is added around the nucleus. The outermost orbital gets far away from the nucleus and hence, the distance between the nucleus and outermost orbital gets increased.
Thus, the atomic radii of the elements increases as we move from top to bottom in a group.
Hence, the correct answer is Option D.
Answer:
Q = 836 J
Explanation:
Given data:
Mass of water = 10.0 g
Temperature increased =ΔT = 20°C
Specific heat capacity of water = 4.18 J/g.°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Q = 10.0 g × 4.18 J/g.°C × 20°C
Q = 836 J
Answer:
27.3 L
Explanation:
To calculate the volume of the balloon at a certain height, we can use the combined gas law. The volume of the balloon at the new height is approximately 1.13 L.
To solve this problem, we can use the combined gas law, which states that the ratio of the initial pressure, volume, and temperature will be equal to the ratio of the final pressure, volume, and temperature.
Using the formula PV/T = constant, we can set up the equation (1.00 atm * 2.30 L) / (23.5 + 273.15 K) = (0.810 atm * V) / (12.0 + 273.15 K), where V is the volume of the balloon at the new height.
Simplifying the equation and solving for V, we find that the volume of the balloon at the new height is approximately 1.13 L.
#SPJ2
The answer is 3/2 the original pressure. The concept behind this is the ideal gas law wherein it states that Pressure (P) times volume(V) is equal to number of moles (n) times ideal gas constant (R ) times temperature (T). Since you’re trying to calculate for the pressure you use P=nRT/V. Input 3 to Temperature and 2 to volume. You’ll get a pressure of 3/2 which is 3/2 times the original pressure.
Answer:
Explanation: