Since the question says “these” I assume it was multiple choice...but anyways, intermolecular forces between some of the water molecules are breaking apart. The H2O is going from a tightly packed solid of a fixed volume to a liquid with molecules moving faster and less bonds, which can take the shape of its container. It requires energy to break a bond, so this is an endothermic process.
<span>Because protons and neutrons are so much more massive than electrons, almost all of the atomic mass in any atom comes from the nucleus, which contains all of the neutrons and protons.</span>
Mixing equal amounts of a strong acid with a strong base also produces a neutral pH (pH = 7) solution<span>.
</span>A neutralization reaction<span> is when an acid and a base</span>react<span> to form water and a salt and involves the combination of H</span>+<span> ions and OH</span>-<span> ions to generate water. The </span>neutralization<span> of a strong acid and strong base has a pH equal to 7.</span>
Answer:
Explanation:
The most easily reduced groups in a protein are disulfide bonds, RS-SH.
Answer:
2.50x10²¹ atoms
Explanation:
First we <u>convert the given mass of dimercaprol to moles</u>, to do so we <em>calculate its molar mass</em>:
- Molar Mass of HSCH₂CHSHCH₂OH = (Molar Mass of C)*3 + (Molar Mass of H)*8 + (Molar Mass of S)*2 + Molar Mass of O = 124.227 g/mol
515 mg equal 0.515 g
- 0.515 g ÷ 124.227 g/mol = 4.146 x 10⁻³ mol
As one dimercaprol molecule binds to one As atom, one mol of dimercaprol reacts with one mol of As.
So we <u>convert those 4.146 x 10⁻³ mol of As to atoms</u>, using <em>Avogadro's number</em>:
- 4.146 x 10⁻³ mol * 6.023x10²³ atoms/mol = 2.50x10²¹ atoms
