You throw a ball vertically upward so that it leaves the ground with velocity 5.68 m/s.

(a) What is its velocity when it reaches its maximum altitude? magnitude 0 Correct: Your answer is correct. m/s direction Incorrect: Your answer is incorrect.

(b) What is its acceleration at this point? magnitude -9.8 Incorrect: Your answer is incorrect. The response you submitted has the wrong sign. m/s2 direction Incorrect: Your answer is incorrect.

(c) What is the velocity with which it returns to ground level? magnitude -5.68 Incorrect: Your answer is incorrect. The response you submitted has the wrong sign. m/s direction Correct: Your answer is correct.

(d) What is its acceleration at this point? magnitude 9.8 Correct: Your answer is correct. m/s2 direction Correct: Your answer is correct.

  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

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle