Party City sells helium-filled 4-liter Happy Birthday Mylar balloons. The temperature in the store is 293
K(about 68 degrees Fahrenheit). The balloon
contains 0.5 moles of helium gas. What will be the
pressure be in the balloon caused by the helium
molecules bouncing against the inside of the Mylar
balloon?

What are the genotypic and phenotypic ratios

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *