Phosphorus-32 has a half-life of 14.0 days. starting with 8.00 g of 32p, how many grams will remain after 84.0 days ?

0.125 g

Explanation:

In a first-order decay, the formula for the amount remaining after n half-lives is

where

N₀ and N are the initial and final amounts of the substance

1. Calculate the number of half-lives.

If

2. Calculate the final mass of the substance.  

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.