Answer:
Hiii Friend..... your question's answer is 84.007g/mol......hope it helps you.
Answer:
0.33 moles
Explanation:
to find the number of moles,
moles = number of atoms / avogadro's number ie 6.02 x
moles = 2.0 x
/ 6.02 x ![10^{23}](https://tex.z-dn.net/?f=10%5E%7B23%7D)
moles = 0.33 mol
No boiling water is not a chemical change it would be a physical change
The mass of wood before burning does not always equal the mass of the resulting ashes after burning because some other products have been produced and lost.
<h3>Burning of wood</h3>
When wood burns, a form of chemical change takes place and the reaction is reversible.
The products of wood burning include ashes, carbon dioxide, and water vapor. However, only ashes remain after burning because carbon dioxide and water vapor both escape into the atmosphere.
The escape of some of the products of burning into the atmosphere is one of the reasons the reaction seems to negate the law of conservation of mass.
According to the law of conservation of mass, masses are conserved during reactions but can be converted to different forms. Thus, if ashes were to be the only product of the burning of wood, then the mass of the ashes formed must be equivalent to the mass of the wood.
However, due to the formation of other products that happen to always escape into the air, the mass of ashes is not always equal to the mass of the woods that burn.
More on the law of conservation of mass can be found here: brainly.com/question/28711001
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Explanation:
Julian should use the ordinary wooden ramp and wooden block as the control . A control group is usually not priority of the experiment. It is used to understand an experiment better.
- The control in this experiment can be just the ordinary wooden ramp and the blocks.
- He should time the rate at which the blocks slides down the ramp.
- This will be a perfect control in the experiment and it can give information about how the blocks will fare ordinarily without any lubricant.
Learn more:
Experimental design brainly.com/question/5249450
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