a. SiO2 is inorganic
b. CsH4Cl2 and c. CsH202(OH)3 are organic
Got no idea for d. Caci
<em>In physics, a vapor or vapour is a substance in the gas phase at a temperature lower than its critical temperature, implying that the vapor can be condensed into a liquid by increasing the pressure without lowering the temperature. A vapor is not the same as an aerosol.</em>
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Planting trees would decrease the amount of carbon in the atmosphere.
Hope this helps! :3