Answer:
to validate the law of conservation of mass as total no. of reactants must be equal to the total no. of products
150 grams of water because if 225 grams of propane are burned with 125 grams of oxyegen then there will be 150 grams of water
13.4 billion years is 3 times of the half-life, 4.47 billion years. So the Uranium-238 will go through three times of half decay. So the remain percentage will be 50%*50%*50%=12.5%.
Answer: The answer to the first one is the second option and the answer for the second one is the first option.
Explanation:
Answer: The bold staircase in the periodic table allows us to classify which elements are metalloids.
Explanation: Additionally, it acts like a "divider" that allows us to properly distinguish the metals from the non-metals in the periodic table.
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