Answer: Meteoroid
Explanation:
Dwarf planets are smaller than moons
Comets are smaller than dwarf planets.
Meteoroids, Meteors, and Meteorites are broken off pieces of comets.
Meteoroids are smaller than Asteroids
Answer:
The pH of a solution containing an amphetamine (with pKb of 4.2) concentration of 250 mg/l is 10.5
Explanation:
To solve the question we note that the
The mass of amphetamine = 250 mg/l
The molar mass of amphetamine = 135.2062 g/mol
Number of moles of amphetamine = (250 mg)/(135.2062 g/mol) = 1.85×10⁻³ moles
That is the initial concentration of amphetamine = 1.85×10⁻³ M
We have
therefore
Which gives 6.3×10⁻⁵
x = 0.0003116 = [OH⁻] = [C₉H₁₃NH⁺]
However x = [OH⁻] = 3.116×10⁻⁴
pOH = -log[OH⁻] = -log(3.116×10⁻⁴) = 3.506
pH = 14 - pOH
= 14 - 3.506
= 10.49
≈ 10.5
Conduction
Explanation:
Stirring a pot with a metal spoon thereby making the spoon hot in the hand is a mode of heat transfer called conduction.
Heat is form of energy that causes differences in temperature between two bodies.
- There are three modes of heat transfer which are conduction, convection and radiation.
- Radiation is a form of heat transfer that does not involve a material medium.
- Convection is heat transfer in fluids that involves movement of the materials of the medium.
- Conduction is a mode of heat transfer in solids that involves movement of the materials of the medium.
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Heat transfer from sun brainly.com/question/1140127
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Answer:
CnH2n+2 formula
Explanation:
Alkanes have the general formula CnH2n+2, so if an alkane had 7 carbon atoms, it would have the molecular formula C7H16.