Answer:
The first one would describe it best
Explanation:
The second option sounds like a single displacement reaction
The third is a decomposition reaction
ANd the first is a combination reaction
Answer:
Solubility, length, hardness, color, mass, density, weight, volume, boiling, and point.
Explanation: Hope this helps
Answer:
Mars
Explanation:
Mars is a planet called the red planet.
It is one of the nearest planets to the Earth.
Scientists are researching in order to find life on Mars.
Hope this helped!
~AnonymousHelper1807
Half life is 15 hours
so 30 hours would be 2 half lives
after 15 hours it would be at 50%
after 15 more hours it would be at 50% of 50%
so .5 x .5 = .25
it would be 25%
