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Universe grows and cools until 100 seconds after the Big Bang. The temperature is 1 billion degrees, 109 K. Electrons and positrons annihilate to make more photons, while protons and neutrons combine to make deuterons. Almost all of the deuterons combine to make helium.
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Answer:
31.3grams
Explanation:
The amount of a radioactive element that remains, N(t), can be calculated by using the formula;
N(t) = N(o) × 0.5^{t/t(1/2)}
Where;
N(t) = mass of substance remaining
N(o) = mass of original substance
t(1/2) = half-life of substance
t = time elapsed
From the provided information; N(t) = ?, N(o) = 250g, t(1/2) = 1599 years, t = 4797 years
N(t) = 250 × 0.5^{4797/1599}
N(t) = 250 × 0.5^(3)
N(t) = 250 × 0.125
N(t) = 31.25g
N(t) = 31.3grams
Answer:
The word (Carbon Dioxide) is a gas that takes up around 0.03% of the atmosphere and can be dangerous if inhaled for too long.
The scientific formula for the gas (Carbon Dioxide) is CO2
(1 carbon + 2 oxygen)
[Hey if this is wrong, don't post a rude reply! Message me and I will try to correct the answer!]
Most of the light passes through glass but none of the light passes through metal.