The colors emitted by fireworks are products of chemical reactions. These products can be harmful to the environment, that's why, in other countries, it is prohibited to use fireworks, unless during New Year or Christmas. For example, blue fireworks from copper release cancerous dioxins, green sparks come from barium which is radioactive,etc.
Finish their experiment and conclusions, then remake their observations and reform a new hypothesis and procedure, and repeat until they are correct
Answer:
V = 0.24 L.
Explanation:
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In this case, it is possible to approach this problem by using the ideal gas equation defined by:
Whereas our unknown is V, volume, and we solve for it as follows:
Then since the STP conditions are ate 273.15 K and 1 atm, the volume of 0.011 moles of CO2 gas turns out to be:
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Answer:
The solutions are classified according to their ability to scatter light rays.
We can't just use this property because some true solutions also contain undissolved solute.
Explanation:
Tyndall effect refers to the ability of a solution to scatter light rays. True solutions do not scatter light rays while false solutions scatter light rays.
Colloid particles are not large enough to be seen with naked eyes unlike suspensions. We should not confuse a colloid with a suspension because in a suspension, the dispersed solutes are seen with naked eye.