If you consider the motion of the slinky as just one object, you can look at it's center of mass. From the whole slinky point of view, there is only one force on the slinky - the gravitational force. This means that it falls and accelerates downward with an acceleration of -9.8 m/s2 just like all free-falling objects. Plze mark brainiest
Answer:
the star’s mass
Explanation:
the bigger the mass, the different lifestyle it will go through, our star will swell into a red giant then shed its outer layers until its a white dwarf then fade into a burned out cinder core.
Because they have used most of their energy
Answer:
Mass of zinc react with oxygen = 156.91 g
Explanation:
Given data:
Volume of oxygen = 18.9 L
Temperature = 15°C
Pressure = 1.50 atm
Mass of zinc react with oxygen = ?
Solution:
Chemical equation:
2Zn + O₂ → 2ZnO
Number of moles of oxygen:
PV = nRT
1.50atm ×18.9 L = n× 0.0821 atm.L / mol.K × 288 K
28.35 atm.L = n× 23.64atm.L / mol
n = 28.35 atm.L / 23.64atm.L / mol
n = 1.2 mol
Now we will compare the moles of oxygen and Zn.
O₂ : Zn
1 : 2
1.2 : 2/1×1.2 = 2.4 mol
Mass of zinc required:
Mass = number of moles × molar mass
Mass = 2.4 mol × 65.38 g/mol
Mass = 156.91 g
