In this case, you have five electron domains around the central atom(1 pair and 4 bonds). This means that the general shape is going to be a trigonal planar with a line going through the middle. This would normally form a trigonal bipyrimid. But, one of these domains is a lone pair, so remove a bond from the trigonal plane. This gives you a "V" shape with a line going through the vertex, making a see-saw shape.
By looking at the graph, you can determine the answer is C. Na2HAsO4 and Na2SO4.
Answer:
The final temperature will be close to 20°C
Explanation:
First of all, the resulting temperature of the mix can't be higher than the hot substance's (80°C) or lower than the cold one's (20°C). So options d) and e) are imposible.
Now, due to the high heat capacity of water (4,1813 J/mol*K) it can absorb a huge amount of heat without having a great increment in its temperature. On the other hand, copper have a small heat capacity (0,385 J/mol*K)in comparison.
In conclusion, the copper will release its heat decreasing importantly its temperature and the water will absorb that heat resulting in a small increment of temperature. So the final temperature will be close to 20°C
<u>This analysis can be done because we have equal masses of both substances. </u>
Answer:

Explanation:
Hello!
In this case, according to the given balanced chemical reaction:

We can see there is 1:1 between benzene and chlorobenzene as the relavant product; thus, since the molar mass of benzene is 78.11 g/mol and that of chlorobenzene is 112.55 g/mol, the theoretical yield for this reaction turns out:

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