Answer:- 
Solution:- It is a unit conversion where it asks to convert kg of He to atoms. We need to convert kg to grams, grams to moles and finally moles to atoms.
We know that, 1 kg = 1000 g
Molar mass of He is 4.0 grams per mole and 1 mole of an atom equals to Avogadro number of atoms.
The set up would be as given below:
=
So, there are of He in it's 536 kg.
Since phrenology is the study of the shape and size of the cranium indicating character and mental abilities,
the answer would be A, (A.J. joined a group that studies phrenology)
Answer:In astronomy, geography, and related sciences and contexts, a direction or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. [1] Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction. In general, something that is vertical can be drawn from up to down (or down to up), such as the y-axis in the Cartesian coordinate system.
Contents
1 Historical definition
2 Geophysical definition
2.1 The plumb line and spirit level
2.2 The flat earth approximation
2.3 The spherical Earth
2.4 Further complications
2.5 Walls and floors
2.6 Independence of horizontal and vertical motions
3 Mathematical definition
3.1 In two dimensions
3.2 In three dimensions
3.3 In the classroom
4 Discussion
4.1 Practical use in daily life
5 See also
6 References and notes
7 Further reading
8 External links
Historical definition
Girard Desargues defined the vertical to be perpendicular to the horizon in his 1636 book Perspective.
The word horizontal is derived from horizon,[2] whereas vertical originates in the late Latin verticalis, which is from the same root as vertex, meaning "highest point".[3]
Geophysical definition
Further information: Gravity of Earth and Figure of Ea
Explanation:
Answer:
Trisulfur diiodide
Explanation:
Elements that can form multiple covalent compounds are named using Greek prefixes (mono-, di-, tri-, etc). Iodides are the I+ atoms.
Hence the name <em>trisulfur diiodide</em>
