Anything in group 18. These are the noble gases, known for having the stable octet in the outermost electron shell (with the exception of Helium). These elements include Neon, Xenon, and Radon, to name a few.
Answer:
NH2- has two pairs of bonding and two pairs of non-bonding electrons participated in the formation of a molecule. The central nitrogen atom has two pairs of non-bonding electrons cause repulsion on both bonding pairs which pushes the bonds closer to each other. So, NH2- has a bent (angular) molecular geometry.
Explanation:
Answer is in the photo. I can only upload it to a file hosting service. link below!
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Answer: 0.72 AND 0.5 RESPECTIVELY/.
Explanation:
The Rf value is defined as the ratio of the distance moved by the solute (i.e. the dye or pigment under observation) and the distance moved by the the solvent ie the migration of the solvent along the paper, where both distances are measured from point where the sample is first spotted on the paper.
Rf value= (migration distance of substance)/(migration distance of solvent front)
or
Rf value=Distance from Baseline travelled by Solute
/Distance from Baseline travelled by Solvent (Solvent Front)
For Arginine Rf = (4.9 cm)/(6.8 cm) = 0.72
For glycine Rf = (3.4 cm)/(6.8 cm) = 0.5
The soccer field has been placed with the outlines of the slaked lime. The chemical dust off from the falling has been calcium hydroxide.
<h3>What is slaked lime?</h3>
The boundary wall to the soccer or the other field has been marked with slaked lime powder. The chemical has the ability to react with bacteria and act as a disinfectant.
The slaked lime chemically is a white powder of calcium hydroxide. Thus, after falling on the soccer field, the chemical dusted off by Carla is calcium hydroxide. Thus, option A is correct.
Learn more about slaked lime, here:
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