Answer:
Carboxylic acid, any of a class of organic compounds in which a carbon atom is ... to an oxygen atom by a double bond and to a hydroxyl group by a single bond. ... sour-milk products) and citric acid (found in citrus fruits), and many keto acids ...
Explanation:
Heat capacity or thermal capacity is a physical property of a material object, defined as the amount of energy (in the form of heat) that must be added to (or removed from) the object in order to achieve a small change in its temperature, divided by the magnitude of that change.
Answer:
Independent variables are ones that can be controlled and dependent variables are results of these changes. So, in question a, an independent variable is amount of a released energy, in these case in form of heat. We reduced that amount and as a result we get a dependent variable as high temperature of chocolate for longer time, so we changed time of a heat releasing from chocolate. In question b, an independent variable is temperature of water, and a dependent variable is amount of produced oxygen. In question c, an independent variable is an intensity of exercise. When we change the intensity of exercise, as a results, breathing rate is changed, which is dependent variable.
Explanation:
Argon, as all of the ions have 18 electrons.
Answer:
Cs > Ba > Bi > Hf > Ta
Explanation:
The atomic radius of a chemical element defined as the distance between nucleus and electron from the center.
<u>The atomic number and atomic radius of given elements are:</u>
<u>Barium (Ba):</u>
Atomic number - (56)
Atomic radius - 268 pm
<u>Caesium (Cs) </u>
Atomic number - 55
Atomic radius - 343 pm
<u>Hafnium (Hf):</u>
Atomic number - 72
Atomic radius - 225 pm
<u>Bismuth (Bi):</u>
Atomic number - 83
Atomic radius - 230
<u>Tantalum (Ta):</u>
Atomic number - 73
Atomic radius - 220 pm
According to the given atomic radius the decreasing order of atomic radius is Cs > Ba > Bi > Hf > Ta.
Caesium has highest atomic radius among all even though lowest atomic number because the force of attraction between the nucleus and the outermost electron is low and outermost electron are loosely held.
Barium (Ba) has lower atomic number than Bismuth (Bi) but still atomic radius of Barium is high because moving across the periodic table atomic radius decreases as force of attraction between nucleus and outer electrons is high.
Bismuth (Bi) has higher atomic number that Hafnium (Hf), atomic radius of Bi is more than Hf.
Tantalum (Ta) have higher atomic number than Hafnium (Hf) but still have lower atomic radius as as force of attraction between nucleus and outer electrons is high.
Hence, the decreasing atomic radius is Cs > Ba > Bi > Hf > Ta.
