Salad would be a mixture because it is not chemically combined, if needed you could physically take it apart. So your answer would be A.)
Answer:
The mass of CO in 12,000 Liters of air is
.
Explanation:
The ppm is the amount of solute (in milligrams) present in one Liter of a solvent. It is also known as parts-per million.
To calculate the ppm of oxygen in sea water, we use the equation:

The ppm concentration of CO = 10 ppm
Mass of CO = m
Volume of air = 12,000 L


The mass of CO in 12,000 Liters of air is
.
Answer:
12
Explanation:
The coefficient of the CO2 shows the amount of CO2 needed in the reaction so to react with 11 water, 12 molecules of carbon dioxide is needed.
The second one is correct
<h2>
Answer: O: 1s22s22p4</h2>
Explanation: In writing the electron configuration for oxygen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for O go in the 2s orbital. The remaining four electrons will go in the 2p orbital. Therefore the O electron configuration will be 1s22s22p4.