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Anni [7]
3 years ago
11

Select the choice that best completes the following sentence. Simple machines A. cannot be combined to make compound machines. B

. are tools that make work easier. C. reduce the amount of energy needed to do work. D. are made up of multiple moving parts.
Chemistry
1 answer:
Setler79 [48]3 years ago
4 0

B because machined make work 2x more work or higher

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nekit [7.7K]
The two half-reactions are...
Ag→Ag+
and...
NO3→NO
Let's start by balancing the first half-reaction...
Ag→Ag+
The amounts are already balanced; 1:1. The oxygens are balanced. So all that's left is to balance the charge...
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Now let's do the other equation... Amounts of nitrogen are balanced, so we first need to balance the oxygens...
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Now let's go ahead and rewrite each half-reaction after being balanced by themselves...
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Now we need to multiply by some factor to get the electrons to cancel out. In this case, that factor is 4, which needs to be applied to the top half-reaction...
4(Ag→Ag++e−)=4Ag→4Ag++4e−
Then we combine this half-reaction with the second one above to get...
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3 0
3 years ago
Can sombody pls help me with this​
luda_lava [24]
Wouldn’t it be half of each? For 36 I guess is 18 and 54 will be 27, (NOT SURE)
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