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Ksju [112]
3 years ago
9

The reason that elements in the same group all have similar chemical properties is because they all have the same

Chemistry
1 answer:
sveta [45]3 years ago
4 0
D-number of electrons in the outer energy level.
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Can you help me with my Chemistry homework please? Can you answer the blank ones? And number 20 please.
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3 years ago
A corpse discovered in the desert at 5:00 PM was found to have larvae from the blow fly species Phormia regina that had just dev
horrorfan [7]

Answer:

12.19 hours prior to discovery was the corpse placed in the desert.

Explanation:

Heat required for fly eggs to develop into first instar larvae = Exposure\,time\times temperature

From the given,

Exposure time = 16 hrs

Temperature = 27 C

=16\times 27 = 427.2^{o}C

The day time exposed hours is 10 hrs.-(7.00am-5.00pm)

=10\times 37.8 = 378^{o}C

So, the extra heat  = 427.2-378= 49.2

The addition heat divided by average temperature.

Average temperature = 22.4 C

=\frac{49.2}{22.4}= 2.19 hrs

So, the total time exposed is night time hours to day time hours.

= 10+2.19 = 12.19 hrs.

Therefore, 12.19 hours prior to discovery was the corpse placed in the desert.

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3 years ago
Draw the following isomers of the alkanes of molecular formula C-H16
Andre45 [30]

I don't know how to draw it but I can solve it

7 0
4 years ago
El amoniaco y el fluor reaccionan para formar tetrafluoruro de dinitrogeno y fluoruro de hidrogeno. segun la reaccion: NH3 + F2
White raven [17]

Answer:

son 12.6 gramos de HF

Explanation:

Tienes que saber qual es el reactor limitante en este caso es fluoruro con los 20 gramos puedes producer .631 mol qual son 12.6 gramos

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4 years ago
When sugar dissolves in water are covalent bonds broken?
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