150 0.0000 2. Use the distance from the previous problem to calculate how long it takes for light to travel from the
Sun to Earth.
300,000,000X 15000,000,

 t = 5 10² s

Explanation:

Light is an electromagnetic wave that travels at a constant speed of 3 10⁸ m/s in vacuum.

The distance from the Sun to the Earth is 150 10⁶ km

Let's reduce the distance to the SI system

       x = 150 10⁶ km (10³ m / 1 km) = 150 10⁹ m

Since the velocity is constant, we can use the uniform motion relations

       v = x / t

       t = x / v

let's calculate

       t = 150 10⁹ / 3 10⁸

       t = 5 10² s

  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

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )