Answer:
An element is made of atoms
Explanation:
The answer is D. hope I was right
Answer:
Lead
Explanation:
While taking sample from flint's distillery, theybfoind 13000 ppb or parts per billion lead in the water itself
Answer:

Explanation:
Na₂S₂O₃ solution does not react with KI (it reacts with I₂), so it is simply diluting the KI, and we can use the dilution formula.

Data:
c₁ = 0.15 mol·L⁻¹; V₁ = 5 drops
V(Na₂S₂O₃) = 40 drops
Calculations:
(a) Calculate the total volume
V₂ = 5 + 40 = 45 drops
(b) Calculate the concentration
0.15 × 5 = c₂ × 45
0.75 = 45c₂

Answer:
The older scientist were ignorant
Explanation:
they thought that they were better than the younger scientist. to put it in simply they were ignorant to think younger is worse