Protons-19 because protons are equal to the atomic number which is 19 , electrons-19 electrons are equal to number of protons, neutrons-20 because the mass number of potassium is 39 so subtract 39 from 19 (atomic number) which gives us 20
The total energy of a system remains constant.
<u>Answer:</u> The correct answer is geographical map.
<u>Explanation:</u>
Model is defined as the three dimensional representation of a proposed structure in a smaller scale.
For the given options:
<u>Option 1:</u> PV = nRT
This is a proposed law. This law is known as ideal gas law. A law is defined as the rule which defined a correct procedure. For any gas behaving ideally, this law is used.
<u>Option 2:</u> Geographical map
Map is defined as the diagrammatic representation of an area of land or sea which also shows physical features, roads, cities etc..
A 3-D model can be prepared for geographical map.
<u>Option 3:</u> I believe that aliens exist
This is a hypothetical statement. It is a smart guess by the means of set of assumptions and observations. For its validation, we need to conduct some experiments.
Hence, the correct answer is geographical map.
Answer:
223 L
Explanation:
Step 1: Write the balanced equation.
2 LiOH + CO₂ = Li₂CO₃ + H₂O
Step 2: Calculate the moles corresponding to 440 g of LiOH
The molar mass of LiOH is 23.95 g/mol.
440 g × (1 mol/23.95 g) = 18.4 mol
Step 3: Calculate the moles of CO₂ that react with 18.4 moles of LiOH
The molar ratio of LiOH to CO₂ is 2:1. The reacting moles of CO₂ are 1/2 × 18.4 mol = 9.20 mol.
Step 4: Convert 20°C to Kelvin
K = °C + 273.15 = 20 + 273.15 = 293 K
Step 5: Convert 753 torr to atm
753 torr × (1 atm/760 torr) = 0.991 atm
Step 6: Calculate the volume of CO₂
We will use the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 9.20 mol × (0.0821 atm.L/mol.K) × 293 K / 0.991 atm
V = 223 L
