During a lunar eclipse, what occurs? * A. The Sun's shadow falls on the Moon.
B. The Moon's shadow falls on the Earth.
C. The Earth's shadow falls on the Moon.
D. The Moon's shadow falls on the Sun

Half of the Earth is dark. What is the dark half of Earth experiencing? *

A. A lunar eclipse
B. A solar eclipse
C. A power outage
D. Nighttime

A lunar eclipse in which the Moon lies completely in the Earth’s umbra is called a total lunar eclipse. In a penumbral lunar eclipse, the Moon lies partially in the penumbra. *

A. true
B. False

Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form in a straight line. Which list represents the position of Earth, the sun, and the moon during a full moon? *

A. Earth, sun, moon
B. sun, moon, Earth
C. moon, sun, Earth
D. sun, Earth, moon

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2