Which of the following molecules has a polar covalent bond?
1 answer:
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Answer:
Ba
Explanation:
Magnesium is the element of second group and third period. The electronic configuration of magnesium is - 2, 8, 2 or
There are 2 valence electrons of magnesium.
Fluorine is the element of seventeenth group and second period. The electronic configuration of fluorine is - 2, 7 or
There is 1 valence electron of fluorine.
They will combine and form
<u>The same type of compound is formed by the other members of the group 2 since they will have 2 valence electron.</u>
Group 2 includes:- beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Hence, correct options is:- Ba
Answer:
B. Gas.
Explanation:
- Kindly, see the attached image of CO₂ phase diagram.
- Extrapolating the T from - 60.0°C and P from 1.0 atm, you will find that CO₂ is in the gas phase.
- So, the right choice is: B. Gas.
The relation between density, mass and volume is
1) to calculate = volume
given:
Density = 0.0915 g/ mL
mass = 17.7 grams
formula used:
Thus
Volume
Answer: 193.44 mL
2) the mass of sample will be
Answer: 7 g