Dear friend,
Because the water remains water throughout this process, it is not undergoing any chemical change. There is no new substance or element added but only a change of form.
The answer is A. Most galaxies appear to be moving away from each other. Scientists discovered this when looking through very expensive microscopes, and saw that the universe was always growing and expanding, as if exploding from one point and moving outward.
Answer:
20.5 atm
Explanation:
First, let's calculated the volume of the air tank. For a sphere, the volume is
V = (4/3)xπr³, where r is the radius.
The diamenter given is 78 cm, so r = 78/2 = 39cm, then:
V = (4/3)xπx39³
V = 248,474.84 cm³
Knowing that 1 cm³ = 0.001 L, V = 248.5 L
The gas will reduce its volume, but the temperature will not change, so we can use the Boyle equation for isothermic transformation:
P1V1 = P2V2, supposing that in the initial state the gas is in 1 atm
1x5100 = P2x248.5
P2 = 5100/248.5
P2 = 20.5 atm (3 significant digits)
Answer:
Your answer choice is D
Explanation:
I just got it right on USATestprep :))
"Sigma"s between the hydrogens and the oxygen