Can you explain so I can understand

Chemistry

2 answers:

lions [1.4K]3 years ago

7 0

So, it's asking which is not needed for an electric circuit
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In that case, think of or google a picture of an electric circuit diagram.
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Look at one and think of something that would not be needed for an electric circuit [ Based on the answer choices ]
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If you need the answer, comment that and I will tell you.
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Glad I could help, and good luck!
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Art [367]3 years ago

4 0

It would be insulator because an insulator kills electricity, it can't travel through it.

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A 1.000-g sample of lead shot reacted with oxygen to give 1.077 g of product. Calculate the empirical formula of the lead oxide

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It mean it consisted of 1 g of lead and 0.077 g of O2.
divide these numbers by molar mas.
1/82=0.012 Pb /0.004 = 3
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C. Answer correct I think…

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Which of the following below is the complete ionic equation of the reaction: Calcium nitrate and sodium sulfide solutions react

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To find the net ionic equation we must first write the balanced equation for the reaction. We must bear in mind that the reagents Ca(NO3)2 and Na2S are in the aqueous state and as product we will have CaS in the solid state, since it is not soluble in water and NaNO3 in the aqueous state.

The balanced equation of the reaction will be:

$Ca(NO_3)_{2(aq)}+Na_2S_{(aq)}\rightarrow CaS_{(s)}+2NaNO_{3(aq)}$

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Which characteristic is a behavior adaptation in birds?

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if you need help again i'll be there.

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Which of the following is not the same as 12.5 millimeters? 0.0000125 km 0.00125 hm 0.0125 m 1.25 cm

erma4kov [3.2K]

1 mm (millimeter) = 0.000001 km (kilometer)
12.5 mm = 0.0000125 km

1 mm = 0.00001 hm (hectometer)
12.5 mm = 0.000125 hm

1 mm = 0.001 m (meter)
12.5 mm = 0.0125 m

1 mm = 0.1 cm (centimeter)
12.5 mm = 1.25 cm

So the only one of the answer choices that doesn't equal 12.5 mm is 0.00125 hm, since 12.5 mm is 0.000125 hm.

Answer:
0.00125 hm

Hope this helps!

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