Answer:
Um english please I don’t know Jewish
Explanation:
First we have to understand what a half life is. A half life is a measure of time when the amount of a certain object is 50% of the original amount. Hence the answer for this is letter A. The initial amount is 100. fifty percent of 100 is 50 and that happens after 15 hours. Hence, 15 hours is the half life period.
The opposite type of reaction (where energy is taken in from the surroundings of a reaction and thus the energy of the reactants is lower than that of the products) is called an endothermic reaction
Answer:
Chemistry is the scientific study of matter and its properties
Explanation:
hope it helps <3
mark me as brainliest
I think the answer is Density
