Which metal sulfides can be precipitated from a solution that is 0.01 M in Mn2+,Zn2+,Pb2+ and Cu2+ and 0.10 M in H2S at a pH of 1.0? 
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Environment
The surroundings or conditions in which a person, animal, or plant lives or operates, including natural, social, and cultural factors.
Intelligence
The capacity for learning, reasoning, understanding, and similar forms of mental activity; aptitude in grasping truths, relationships, facts, meanings, etc.
Mental Retardation
An outdated term for intellectual disability, which is characterized by below-average intellectual functioning and a lack of skills necessary for daily living.
IQ Below 70
is often used as a diagnostic criterion for intellectual disability, indicating significant limitations in intellectual functioning and adaptive behavior.
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