Need science help (screenshot included)
1 answer:
A. False. If it is high tide in one place on Earth, the place exactly opposite to it will also have a <em>high</em> tide.
The gravitational attraction of the Moon and the inertia of the oceans cause <em>two tidal bulges </em>on opposite sides of the Earth.
B. True. Cassini used flybys of Venus, Earth and Jupiter as slingshots to reach Saturn.
C. True. The whole solar system moves around the galaxy.
D. True. If a planet’s gravity is not strong enough, the molecules in its atmosphere will have enough kinetic energy to escape into space.
E. False. The <em>mass of an object is constant</em>, but its <em>weight changes</em> according to the gravity of the planet.
F. False. To find the mass of an object, <em>divide</em> its weight by gravity.
or weight = mass × gravity
∴ <em>Mass = weight/gravity </em>
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Answer : The number-average molecular weight is, 97500 g/mol
Explanation :
First we have to calculate the molecular weight of isobutylene and isoprene.
The molecular formula of isobutylene and isoprene is, and
Molecular weight of = 4(12 g//mol) + 8(1 g/mol) = 56 g/mol
Molecular weight of = 5(12 g//mol) + 8(1 g/mol) = 68 g/mol
Now we have to calculate the average repeat molecular weight.
Average repeat molecular weight =
Average repeat molecular weight = 65 g/mol
Now we have to calculate the number-average molecular weight.
Number-average molecular weight = Average repeat molecular weight × Degree of polymerization
Number-average molecular weight = (65 g/mol) × (1500)
Number-average molecular weight = 97500 g/mol
Thus, the number-average molecular weight is, 97500 g/mol