Answer:
The first ionization energy for K is less than Ca because Ca has a larger effective nuclear charge.
The answer would be <span>c.
Antimatter is made up of neutrons and electrons but no positive particles
Hope this helped</span>
Answer:
Explanation:
Depression in freezing point is given by:

= Depression in freezing point
i= vant hoff factor = 1 (for non electrolyte like urea)
= freezing point constant = 
m= molality

Weight of solvent (X)= 950 g = 0.95 kg
Molar mass of non electrolyte (urea) = 60.06 g/mol
Mass of non electrolyte (urea) added = ?


Thus
urea was dissolved.
The color it produces is Bright green.