Answer:
To walk or run, and to wake up.
Structure of an Amino Acid. Amino acids are the monomers that make up proteins. Each amino acid has the same fundamental structure , which consists of a central carbon atom, also known as the alpha (α) carbon, bonded to an amino group (NH 2), a carboxyl group (COOH), and to a hydrogen atom.
The apple is red because it reflects red light but absorbs other colours. If I shine white light from a torch onto the apple only the red light is reflected and enters my eye, so I see the apple as red. Suppose I shine pure blue light (wavelength about 450nm) onto the apple, what will I see. Well the apple will absorb the blue light so no light enters my eye, and the apple looks black
Answer:
The answer to your question is ΔH = 269 kJ
Explanation:
Change the sense of the third reaction
BaCO₃(s) ⇒ Ba(s) + CO₂(g) + 1/2O₂(g) ΔH = 822.5 kJ
Divide the second reaction by 2
Ba(s) + 1/2O₂(g) ⇒ BaO(s) ΔH = -553.5 KJ
Add both reactions and cancel reactants and products
BaCO₃(s) ⇒ BaO (s) + CO₂ (g) ΔH = 269 (822.5 - 553.5)
Answer:
B. hydrogen bonding
Explanation:
Waxy surfaces are non-polar while also water is polar. There is a difference in electronegativity between the atoms O and H, in which O is more electronegative than H. Such a difference in electronegativity causes the two covalent O-H bonds to become polar in water, where O atom has a partial negative charge, and the H atom has a partial positive charge.
Therefore from the above explanation the correct answer is B