First let us compute for the number of moles of butane
(molar mass = 58.12 g/mol)
number of moles = 145 g / (58.12 g/mol) = 2.49 mol
<span>We use the ideal
gas equation to calculate the volume:</span>
<span> V = n R T / P</span>
V = 2.49 mol * 62.36367 L torr / mol K * 308.15 K / 745
torr
<span>V = 64.35 L</span>
Answer:
The term “flat bone” is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs.
HOPE THIS HELPS!!! :D
Correct Answer: option
B: <span> helium and hydrogen
Reason:
</span>
The nebular hypothesis is the most widely accepted theory that explains the formation and evolution of the Solar System. It was proposed by I. Kant. According to this theory, Solar System formed from nebulous material. Further, according to the nebular hypothesis, stars form the massive and dense clouds of molecular hydrogen.
Answer:
Magnesium carbonate doesn't dissolve in water, only acid, where it will effervesce (bubble).
Explanation:
An insoluble metal carbonate reacts with a dilute acid to form a soluble salt. Magnesium carbonate, a white solid, and dilute sulfuric acid react to produce magnesium sulfate. Colourless magnesium sulfate heptahydrate crystals are obtained from this solution.
Calcium has an atomic number 20. This means that calcium has 20 electrons.
The electronic configuration of these 20 electrons is as follows: 2,8,8,2
For the calcium to become stable, it should have eight electrons in its outermost energy level.
Based on this, calcium loses two electrons to form an ion and become stable.