A sample of iron receives 50 J of heat energy that raises the temperature of the iron to a delta T of 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample? (Show working out)

20 g

Explanation: heat received Q = m c dT

Q= 50J , dT= 25 C anc c= 0.10 J / g C

And m = Q / c dT

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explanation:

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).