Which of the following changes decreases the rate of the reaction between magnesium and dilute hydrochloric acid?

How manyatoms of mercury are in 1.4214e+1 ml sample

Can someone me with questions 15 to 17 plz.

Which statement explains which component is likely to be more powerful in explaining a scientific phenomenon? a) component c, because a theory is often passed on possibility and not certainty b) component d, because a hypothesis is often based on possibility not certainty c) component c, because the ability to explain several occurrences in the natural world is a characteristic of a hypothesis d) component d, because the ability to explain several occurrences in the natural world is a characteristic of a theory