you know the mass of an object and the force applied to the bject to make it move . Which of Newtons laws of motion will help yo
2 answers:
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Answer : The metal used was iron (the specific heat capacity is ).
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
where,
= specific heat of unknown metal = ?
= specific heat of water =
= mass of unknown metal = 150 g
= mass of water = 200 g
= final temperature of water =
= initial temperature of unknown metal =
= initial temperature of water =
Now put all the given values in the above formula, we get
Form the value of specific heat of unknown metal, we conclude that the metal used in this was iron (Fe).
Therefore, the metal used was iron (the specific heat capacity is ).
Answer:
number of hydrogen atom in 1.8 mole of NH2OH =
Explanation:
percentage of hydrogen in NH2OH = mass of hydrogen / mass of whole molecule
=\times 100
= 9.09 percentage
therefore number of moles in 1.8 moles of hydroxy amine =
= .16 moles of hydrogen
number of hydrogen atom = (number of moles )×(avagadro number)
= atoms of hydrogen