1.1.2 Quiz: What is Science? Question 6 of 10 Which situation is most likely to lead to improving a scientific theory? O A. Performing experiments that have never been done before O B. Gathering scientists for a brainstorming session C. Analyzing the history of how a theory was developed OD. Increasing public awareness of the need for scientific research

Explanation:

Science can be defined as the systematic pursuit of knowledge that seeks to understand all substances (physical and behavioral) in nature through experiments to either agree or disprove hypothesis that surrounds this substances. Please note that this hypothesis can be made by the experimenter or any other person that might not be involved in the actual experimental procedures.

Question 6

To improve a scientific theory, performing novel experiments on this theory will provide more clarity on this theory. It could reveal the limitations of this theory or could also reveal aspect(s) of the theory that can be better enhanced. For instance, several novel experiments by different scientists have helped improve the Dalton's atomic theory over time leading to the modification of the theory. Thus, the correct option here is A

  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