Heat energy can be calculated by using the specific heat of a substance multiplying it to the mass of the sample and the change in temperature. It is expressed as:
<span>Energy = mCΔT
</span><span>Energy = 59.7 (0.231) (100-25)
</span><span>Energy = 1034.30 J</span>
There are 1,000 mm in a meter so times 1.2 by 1,000 and you get 1,200.
Now since he wants it in three equal pieces divide 1,200/3 and you get 400.
So your answer is: 400 mm
Hope this helps!! Please mark brainliest
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Answer:
2HBr + Pb(NO₃)₂ → PbBr₂ + 2HNO₃
Explanation:
Hydrobromic acid (HBr), reacts with lead (II) nitrate (Pb(NO₃)₂) producing Lead(II) bromide (PbBr₂) and nitric acid (HNO₃). The reaction is:
HBr + Pb(NO₃)₂ → PbBr₂ + HNO₃
This reaction is unbalanced. You can see in products 2 Bromides but in reactants just 1. And in reactants 2 NO₃ but as product just 1. Thus, you can balance the equation, thus:
<em>2HBr + Pb(NO₃)₂ → PbBr₂ + 2HNO₃</em>
And this equation is the answer of your question!
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