Answer:
And that means fish must be able to survive down here. This is due to a special property of water: the elasticity of H2O. We know that when the temperature sinks below freezing, water first contracts and then expands as it begins to turn to ice. Ice, being lighter than water, floats.
Explanation:
The property of water that allows fish to survive in a lake that is frozen over is the fact that ice is less dense than liquid water.
In this checmical reaction there is a transfer of electrons between two species. So the option you are looking for is c. Remember that in this reaction the oxidation number of a molecule changes because gains or looses electrons
Answer:
Thorium-234 option a .......
Answer:
V = 22.86 L
Explanation:
Given data:
Mass of nitrogen dioxide = 45000 mg
Pressure = 1 atm
Temperature = 273 k
Volume = ?
Solution:
First of all we will convert the mass into moles.
<em>Number of moles = mass/ molar mass</em>
Number of moles <em>= </em>45 g/ 46 g/mol
Number of moles = 1.02 mol
Now we will determine the volume at STP.
PV = nRT
V = nRT/P
V = 1.02 mol × 0.0821 atm. mol⁻¹. k⁻¹. L× 273 k / 1 atm
V = 22.86 atm. L /1 atm
V = 22.86 L
There are 3 pairs of electrons that are shared between nitrogen atoms in a nitrogen molecule. Nitrogen atom has a valence electron of 5. To complete it and agree with the octet rule, it should be that three electrons should share with another atom.