â¢ Percentage by mass of each element in a compound â¢ Can be determined from the formula of the compound or by experimental mass analysis of the compound â¢ The percentages may not always total to 100% due to rounding. 100%wholepartPercentage. â¢ Determine the mass of each element in 1 mole of the compound.
The Moon travels around the Earth. The Moon travels around the Earth in a circle called an orbit. How long does it take the Moon to orbit the Earth? The Moon takes about 27 days (27 days, 7 hours, 43 minutes, 11.6 seconds) to go all the way around the Earth and return to its starting position. The Moon's orbit around the Earth is a slightly squashed circle called an ellipse.
This is the one-way time for the signal to get to the moon from Earth, so the round-trip time is. twice this or 2.46 seconds. Problem 4 â In the table below, fill in the one-way travel time from the sun to each of the. planets. Use that fact that the travel time from the Sun to Earth is 8 Â½ minutes.