Answer:
0.17×10⁻³ mol
Mass = 0.00476 g
Explanation:
Given data:
Number of molecules of N₂ = 1 ×10²⁰ molecules
Number of moles of N₂ = ?
Mass in gram of N₂ = ?
Solution:
1 mole of any substance contain 6.022×10²³ molecules
1 ×10²⁰ molecules× 1 mol /6.022×10²³ molecules
0.17×10⁻³ mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.17×10⁻³ mol × 28 g/mol
Mass = 4.76×10⁻³ g
Mass = 0.00476 g
Answer:
Ba has the largest atom size
The greater the friction, or rubbing, between particles in any fluid, the higher the viscosity. A fluid with a high viscosity has a large amount of internal friction. As the temperature of a gas increases, friction increases, and so the viscosity of the gas increases. The warmer the gas, the slower it flows.
Answer: 2. Heat flows from faster molecules to slower molecules when they collide.
Explanation: Hope this helped! :)
Answer:
The mass percent of alcohol in a solution is 19.8 %
Explanation:
First of all we calculate the mass of each compound from the solution.
Solute → Ethyl alcohol
Solvent → Water
To determine the mass, we use density
Density = mass / volume → Mass = Density . volume
Mass of solute: 0.8 g/mL . 62 mL = 49.6 g
Mass of solvent: 1 g/mL . 200 mL = 200 g
Mass of solution = Solvent's mass + Solute 's mass
200 g + 49.6 g = 249.6 g
Mass percent of alcohol → (mass of alcohol / Total mass) . 100
(49.6 g / 249.6 g) . 100 = 19.8 %