Answer:
the last three
Explanation:
its not the first on cause its about heating
Answer: <em><u>That most of an atom's mass was packed in a central nucleus</u></em>
Answer is: the partial pressure of nitrogen gas is 720.0 torr.
The total pressure of an ideal gas mixture is the sum of the partial pressures of the gases in the mixture.
p(mixture) = p(water) + p(nitrogen).
p(water) = 40.0 torr; partial pressure of the water.
p(nitrogen) = p(mixture) - p(water).
p(nitrogen) = 760.0 torr - 40.0 torr.
p(nitrogen) = 720.0; patial pressure of N₂.
Answer:
5.38 moles of CO₂ are produced
Explanation:
This is the reaction:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
First of all, let's convert the mass of C₃H₈ to moles (mass / molar mass)
79 g / 44 g/mol = 1.79 moles
So ratio is 1:3.
1 mol of C₃H₈ is needed to produce 3 moles of CO₂
1.79 moles of C₃H₈ would produce (1.79 .3) /1 = 5.38 moles
Answer:
John Dalton described the atoms based on there chemical and physical properties of which some were disproved later.
Explanation:
John Dalton described the atoms as
- Atoms are the smallest indivisible particles of matter.
- Atoms can neither be created nor destroyed.
- All atoms of the same element are identical by mass and size.
- Atoms of the different element have different mass and size.
- Atoms combined to form a compound and they do so in simply whole number ratio.
