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saw5 [17]
3 years ago
12

Which of the following chemical formulas shows an ionic compound?

Chemistry
2 answers:
sveticcg [70]3 years ago
8 0
C. NaCl
sodium chloride is made up of metals and non metals
harina [27]3 years ago
4 0

Answer:

NaCI

Explanation: I TOOK THE TEST

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Use the successive ionization energies for this unknown element to identify the family it belongs to.
NNADVOKAT [17]

Answer: Belongs to the group 2A

Explanation:

As you can see, the first two ionization energies are close and low, meaning that this element ionizates easily.

Not only loses easily the first electron, but the second too

To remove the third electron you requiered a huge amount of energy

Now, elements easily ionizable are the ones from group IA, group 2A and transition metals.

The last ones have mixed characteristics in matter of how many electrons you can remove from them, so they are not a family.

Now the question: group I or group II ?

The elements of group I have low  ionization energies  for the first electron but high energies for the second ones.

Being all that said, the unknown element belongs to the Group 2A

4 0
2 years ago
What minimum volume of 0.200 m potassium iodide solution is required to completely precipitate all of the lead in 195.0 ml of a
lbvjy [14]
First, we write the reaction equation:

2KI + PbNO₃  → K₂NO₃ + PbI₂
The molar ratio of KI to PbNO₃ is 2 : 1
Moles of PbNO₃ present:
Moles = concentration (M) x volume (dm³)
= 0.194 x 0.195
= 0.038
Moles of KI required = 2 x 0.038 = 0.076 moles
concentration = moles / volume
volume = moles / concentration
= 0.076 / 0.2
= 0.38 L = 380 ml
7 0
3 years ago
Determine the empirical formula of the following compound if a sample contains 5.28 gsn and 3.37 gf.
earnstyle [38]

Answer:

SnF2

Explanation:

you  divide by the smallest number which is 3.37

4 0
2 years ago
If you begin with 4.0 grams of hydrogen and all of the oxygen that you need, how many grams of water can you make?​
yawa3891 [41]

    the water is 36 grams.

hope this helped

7 0
3 years ago
QUICK PLEASE!!!
Assoli18 [71]
Answer. Answer: By adding more carbon dioxide to the atmosphere, the atmosphere becomes more "closed" to energy passing through it, absorbing more. Therefore, thermal energy that once would have been allowed to escape into space is instead absorbed by carbon dioxide and used to heat the Earth. So it’s B
4 0
3 years ago
Read 2 more answers
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