Answer:
b is the answer
Explanation:
non metals are not shiny, brittle, unmalleable, and are poor conductors of thermal energy and electrical current.
The given question is incomplete. The complete question is as follows.
A certain liquid has a normal boiling point of 
and a boiling point elevation constant 
. A solution is prepared by dissolving some sodium chloride (NaCl) in 6.50 g of X. This solution boils at 
. Calculate the mass of NaCl that was dissolved. Round your answer to significant digits.
Explanation:
As per the colligative property, the elevation in boiling point will be as follows.
T = boiling point of the solution =
= boiling point of the pure solvent =
= elevation of boiling constant = 
We will calculate the molality as follows.
molality = 
i = vant hoff's factor
As NaCl is soluble in water and dissociates into sodium and chlorine ions so i = 2.
Putting the given values into the above formula as follows.
m = 100 g
Therefore, we can conclude that 100 g of NaCl was dissolved.
I think it is one,three, and four
Answer:
observe if it reacts with acids
Explanation:
Because whether it reacts is determined by its chemical properties
Continent drifts
Explanation:
The use of fossil evidences to support the correlation of land masses that are presently not together can suggests that continents do move and land masses can change position.
This was one of the earliest prove suggest by Alfred Wegener to back up his theory of continental drift.
- Since fossils are evidence of prehisotric life, a place originally together should have the same fossil contents.
- When they become separated, the fossil contents in their lithology should match.
learn more:
Continental drift brainly.com/question/5002949
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