Answer is: <span>D. 327,992.8 J.
</span>m(granite) = 17 kg = 17000g.
ΔT(granite) = 21°C - 45°C = -24°C (-24K).<span>
cp(granite</span>)
= 0,804 J/g·°C, <span>specific heat capacity of
granite.
Q = m(granite</span>) · ΔT(granite) · cp(granite).<span>
Q = 17000 g ·(-24</span>°C)<span>· 0,804 J/g·K.
Q = -327990 J.
</span>The granite lost 327990 joules of energy.<span>
Q - </span>amount of energy gained or lost.<span>
</span>
High temperature and pressure produce the highest rate of reaction. However, this must be balanced with the high cost of the energy needed to maintain these conditions. Catalysts increase the rate of reaction without affecting the yield. This can help create processes which work well even at lower temperatures.
I hope this helps you.
The two chemical formulas which will correctly complete the table for lithium fluoride are: A. HF, LiOH.
<h3>What is a chemical reaction?</h3>
A chemical reaction can be defined as a chemical process that involves the continuous transformation (rearrangement) of the ionic, atomic or molecular structure of a chemical element by breaking down and forming chemical bonds, in order to produce a new chemical compound while new bonds are formed.
This ultimately implies that, chemical bonds between atoms of a chemical element are broken and then new bonds are formed in all chemical reactions.
<h3>What is a neutralization reaction?</h3>
A neutralization reaction can be defined as a type of chemical reaction between an acid and a base, which typically leads to the formation of an ionic compound (salt) and water as end products as shown below:
LiOH(aq) + HF(aq) → LiF(s) + H₂O(l)
In this context, we can infer and logically deduce that the two chemical formulas which will correctly complete the table for lithium fluoride are HF and LiOH.
Read more on neutralization reaction here: brainly.com/question/27745033
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Answer:
(4) CuO + H₂ → Cu + H₂O.
Explanation:
<em>(1) Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag.</em>
It is considered as a single replacement reaction that Cu replaces Ag in its salt AgNO₃.
<em>(2) 2Cu + O ₂ → 2CuO.</em>
It is a combustion reaction that Cu reacts with oxygen results CuO.
<em>(3) CuCO₃ → CuO + CO₂.</em>
It is a decomposition reaction that CuCO₃ is decomposed to CuO and CO₂.
<em>(4) CuO + H₂ → Cu + H₂O.</em>
It is considered as a synthesis reaction that two reactants CuO and hydrogen are reacted to produce Cu and H₂O.
<em>So, the right choice is: (4) CuO + H₂ → Cu + H₂O.</em>
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