3 years ago

Please help ASAP! I’m lost right now.

1 answer:

3 0

1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^5, 4s^1

Chromium is strange because it moves on to the 4s orbital instead of filling the 3d orbital with that last electron. Tricky.

Mark as brainliest if this helped! :)

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Arizona was the site of a 400,000-acre wildfire in June 2002. How much carbon dioxide (CO2) was produced into the atmosphere by

kodGreya [7K]

Answer:

2.97 × 10¹³ g

Explanation:

First, we have to calculate the biomass the is burned. We can establish the following relations:

2.47 acre = 10,000 m²
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C(s) + O₂(g) ⇒ CO₂(g)

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The molar mass of CO₂ is 44.01 g/mol

The mass of produced is CO₂:

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What percentage of strontium-90 remains in a sample after three half-lives have passed? 12.5% 15% 25% 60%?

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