Tính pH của dung dịch H3PO4 0.01 M. Biết acid H3PO4 có các giá trị pKa lần lượt là: 2.12; 7.21; 12.36

What does the process of natural selection involve

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity