250 200
Time Running: Hide
Attempt due: Oct 10 at 11:59pm
12 Minutes, 9 Seconds
A
150
Temperature (Celsius)
100
B
D
50
SE
0
0
20
40
120
140
160
60 80 100
Time (min)
ry
The diagram above is the cooling curve of a certain chemical X
(molar mass=50 g/mol) with a mass of 100 grams. Based on the
data below, how much heat, in kJ, is released by this substance
during stage E?
]
ledia
(one decimal places for your answer)
otices
?
Help
specific heat of X(g): 0.89 J/g °C
specific heat of X(1): 1.4 J/g °C
specific heat of X(s): 2.6 J/g °C
enthalpy of melting: 4.6 kJ/mol
enthalpy of boiling: 24 kJ/mol

Which of the following best defines homeostasis? forming identical cells breaking down glucose maintaining stable internal conditions increasing an organism's temperature

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

Identify two types of chemical bonding in the source of dietary potassium