Answer: B
Explaination: The liquid solution changed color means is turned into a different substance with different properties. It is chemical change .
The density of the object is 1.96 g/cm³.
Mass = 73.5 g
Volume = 82.5 mL – 45.00 mL = 37.5mL = 37.5 cm³
Density = mass/volume = 73.5 g/37.5 cm³ = 1.96 g/cm³
To calculate empirical formula, number of moles of different atoms calculated first:
Number of moles of Carbon , n=
=
=
= 0.220 mol
Number of moles H =
=
= 0.440 mol
Number of moles of oxygen =
=
= 0.440 mol
Ratio of carbon
=
= 1
Ratio of hydrogen
=
= 2
Ratio of oxygen
=
= 2
So, the empirical formula is CH₂O₂
Answer:
To shield the organs and glands from the enzymes' digestion, protein digesting enzymes are released in an inactive state. If they are discharged in an active state, they begin digesting the glands that transport them as well as the release site.
Explanation: