A proton is moving left through a magnetic field directed up toward the ceiling. In what direction is the magnetic force towards the proton?

Correct  The proton moves toward the wall in front of the observer

Explanation:

The proton is affected by the Lorentz force calculated by the formula:

Fl = q · (V × B) = q · V · B · sin φ

where is:

q -  in this case proton charge

V - the velocity of the particle in this case proton

B - magnetic induction magnitude

φ - angle between velocity and magnitude of magnetic induction

i this case φ = 90° ⇒ sin φ = 1

Fl = q · V · B

The direction of the Lorentz force acting on the positively charged particle coincides with the direction of forward motion of the right screw relative to the plane formed by the velocity and magnetic induction.

So the proton moves toward the wall in front of the observer.

God is with you!!!

  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

resonant frequency