Due to the fact that we must find the weight in 300 years, we must find the weight of the element in 3 half-lives. In order to do this, we must divide the original number, 1 kilo, by 1/8 to find the quantity left. 1 kilo = 1000 grams, 1000 g / 1/8 = 125g. This means that the answer should be D.
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Answer:
CH4+2O2→CO2+2H2O
Moles of oxygen=3232=1
Moles of carbon dioxide=4422=0.5
Moles of water=1818=1
1 mole of methane reacts with 2 moles of oxygen to give 1 mole of CO2 and 2 moles of water so 0.5 mole of methane will be required which is equal to 0.5×16=8g.
Explanation:
8g
Answer:
It has 140 neutrons because Mass number= No of protons + no of neutrons
The answer is D because it sounds like the most ethical answer. The other choices are wrong because the could possibly hurt someone or an animal.
C.) both secrete toxins and have thorns (It simply depends on what kind of plant it is)