Which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant? 1. An increase in pressure causes particles to move closer together, increasing the volume.

2. An increase in pressure causes particles to move closer together, decreasing the volume.

3. An increase in pressure causes particles to move farther apart, increasing the volume.

4. An increase in pressure causes particles to move farther apart, decreasing the volume.

3

Explanation:

Because the pressure in the air, it’s causes particles to move farther apart from each other.

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂