Two glass bulbs each having a volume of exactly 1L are connected by a valve. The left bulb contains a sample of nitrogen gas at a pressure of 101.325 kPa (kiloPascal), the right bulb has been evacuated (all the gas has been removed) and the pressure in the right bulb is 0 kPa. A) The gas will expand into the empty bulb. Expansion of the gas will increase the gas pressure and increase the gas temperature.

B) The volume available for the gas will double Doubling the volume will cause the pressure and temperature to decrease .

C) The gas will expand into the empty bulb Expansion of the gas will increase the gas pressure and decrease the gas temperature

D) The volume available for the gas will double Doubling the volume will increases the amount of gas to keep the pressure constant

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

  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

we need to know the time interval during which the force acts. impulse of force = momentum change