Molecules in a sample of NH3(l) are held closely together by intermolecular forces(1) existing between ions(2) existing between electrons(3) caused by different numbers of neutrons(4) caused by unequal charge distribution

Answer: The balloon will not survive.

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

where,

= initial pressure of gas =  1 atm

= final pressure of gas = 0.05 atm

= initial volume of gas = 4.0 L

= final volume of gas = ?

= initial temperature of gas =

= final temperature of gas =

Now put all the given values in the above equation, we get:

As the balloon has the capacity to expand to a 50 liter volume before bursting, it can not survive as it occupies volume higher than 50 L

 The molar mass of BF3  is  67.81  g/mol

  Explanation

•  Molar mass   is the  mass  of all  atoms  in a molecule  in gram per  mole.
• molar mass  of a molecule is calculated by adding  atomic mass  of constituent  atom

• use the periodic table  to determine the atomic mass of each element in the  molecule.

that is;

         atomic mass of B = 10.81 g/mol

         atomic  mass of F  = 19 g/mol

• since there 3 atoms  of F  in BF3 the  atomic massof F in BF3=  3 x19  =  57 g/mol

• total molar  mass of BF3 = 10.81 g/mol + 57 g/mol = 67.81  g/mol

67.81  g/mol is the molar mass of BF . Therefore, the correct option is option D among all the given options.

The ratio among the mass with the quantity of substance (measured within moles) in any sample of a compound of chemicals is known as the molar mass (M) in chemistry. The molar mass of a material is a bulk attribute rather than a molecular one. The compound's molecular weight is an average over numerous samples, which frequently have different masses because of isotopes. A terrestrial average or a function of the relative proportion of the isotopes of the component atoms on Earth, the molar mass is most frequently calculated using the standard atomic weights.

atomic mass of B = 10.81 g/mol

atomic  mass of F  = 19 g/mol

atomic massof F in BF=  3 x19  =  57 g/mol

total molar mass of BF = 10.81 g/mol + 57 g/mol = 67.81  g/mol

Therefore, the correct option is option D.

To know more about molar mass, here:

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Atom is the most basic unit of matter. They are the general term used to describe pieces of matter. But a different kind of atom makes up an element.  A combination of atom of different elements creates a molecule. For example, you have water; it has a chemical formula of H2O. If you separate H from O, you have two atoms. Two atoms for hydrogen and one atom for oxygen. However, they are of different elements. And when you combine them to form H2O, you create a molecule.