It would be B. A polyatomic ion. Poly means many, while atomic refers to atoms more specifically the nature or category of these atoms is that they are non metallic ones, or basically nonmetal atoms. All of these nonmetallic atoms are joined together through covalent bonds and altogether they possess a unique charge. An example of a polyatomic ion would be sulphate or (SO4)^-3.
Answer:
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Explanation:
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seaweed having 50 g salt in 1 L water. The bucket contains 150 g of salt in 2 L of water
amount of water present in bucket is twice to amount of water in weed
At equilibrium, volume of water in weed is x and volume in bucket is y but concentration remain same as follows:
At equilibrium, weed loose z L from 1 L water to bucket containing 2 L as follows:
Thus, Weed will loose 0.25 L of water
Mass = volume x density
volume = πr²
since Diameter = 2.5 cm
then radius = 1.25cm
∴ volume = π x (1.25cm)³
≈ 6.1359 cm³
Thus mass = 6.1359 cm³ x 11.34 g / cm³
= 69.58 g
