Which of the following is not one of the main ideas of physical science? . a. the universe is very old and very large. b. forces cause changes in motion. c. energy can be transferred from one form to another, but it can never be destroyed. d. one of the main branches of natural science is biology.

Correct answer choice is :

D) One of the main branches of natural science is biology.

Explanation:

Physical science is a part of real science that examines non-living systems, immunity to life science. It, in turn, has many parts, each related to as a natural science, together described the physical sciences. The physical sciences examine the ideas and processes of the non-living physical world, as exposed to the life sciences. Students of the main study of any organization of its subjects, astronomy, chemistry, geology and geophysics, physics, math, statistics, and meteorology.

false

explanation:

boats, things on boats luggage are way more heavy then water.

  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