Answer:
Carbon dioxide is a chemical compound composed two oxygen atoms covalently bonded to one carbon atom. Carbon dioxide's molecular shape is linear. Also carbon dioxide exists in Earth's atmosphere as a gas. Carbon Dioxide- CO2 makes up one of the gases in our atmosphere.
Explanation:
<span>They absorb calcium ions and bicarbonate (hydrogen carbonate) ions.
Sooo B
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Soil is usually layered. The uppermost layer is called topsoil and this layer contains the most humus, plant roots, and living creatures. The middle layer is called subsoil.
Answer:
The element is oxygen.
1s² 2s² 2p⁴
Explanation:
Let's consider the electron configuration of the excited state.
1s² 2s² 2p³ 3s¹
According to the Aufbau principle, the electron in 3s should occupy the shell with lower energy. The ground-state electron configuration is:
1s² 2s² 2p⁴
The differential electron is in the level 2. Then, the element is in the period 2.
The electrons in the last level are 2 + 4 = 6. Then, the element is in the group VIA or 16.
The element is oxygen.
The reaction for the production of NO₂ is as follows:
2 NO + O₂ → 2 NO₂
Then, we use stoichiometry to solve the problem. The solution is as follows:
8 molecules NO₂ (1 molecule O₂/2 molecules NO₂)(0.75) = 3
Therefore, it will need <em>3 molecules of oxygen</em> for a 75% yield.
