People conduct scientific investigations by formulating a hypothesis and observing the results. They then draw conclusions from those results and then share those conclusions with the larger scientific community.
Answer:
α = -0,885°
Explanation:
The specific rotation [α] is defined as:
[α] = α/ c×l <em>(1)</em>
Where α is the observed rotation, c is concentration in g/mL, and l is optical path length in dm.
A racemic mixture has no optical activity. As the solution of (R)-2-butanol is mixed with an equal volume of the racemic mixture the concentration of the original solution decreases twice. That is 1,72M/2 =<em> 0,86M. </em>This concentration in g/mL is:
0,86mol/L××= <em>0,0637 g/mL</em>
Replacing in (1):
<em>α = -0,885°</em>
I hope it helps!
definition physical property can be observed or measured without changing the composition of matter
examples
color
density
volume
mass
definition
chemical A chemical property is a characteristic of a particular substance that can be observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion
examples flammability, toxicity, acidity, reactivity
pretty much the difference is is that chemical changes its chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance Physical change does not do that
1. NaCl
2. CaO
3. KOH
4. MgS
5. CuCO3
6. Al2O3
7. Fe2O3
8. Na2CO3
9. AlHO3
10. (NH4)3N
11. Zn3N2
12. MgCO3
All numbers are subscripts.
The answer is A. Columb
Columb discovered a relationship between charge, their speration, and the force between the two charges in 1787