Answer:
1.59 molal
Explanation:
The <u>definition of molality</u> is:
- molality = moles solute / kg of solvent
So first <u>we calculate the moles of solute</u> (D-glucose, C₆H₁₂O₆), using its <em>molar mass</em>:
- 36.0 g C₆H₁₂O₆ ÷ 180.156 g/mol = 0.200 mol C₆H₁₂O₆
Then we<u> convert grams of water into kg</u>:
- 125.9 g H₂O *
= 0.1259 kg H₂O
Finally we <u>calculate the molality</u>:
- m = 0.200 mol / 0.1259 kg
Magnesium and Hydrochloric acid or Mg and HCl.
The reactants in a reaction are the elements or compounds doing the actual reacting. In this word problem, you can identify this with the keyword reacts. It states, "Magnesium reacts with hydrochloric acid." Thus, you can also infer that the products are what are produced.
Hope this helps!
Answer:
An oxyacid with two less oxygen atoms than the (root)ic acid is named by writing hypo-, then the root of the name for the element other than hydrogen and oxygen, then -ous, and then acid. Therefore, HClO, is hypochlorous acid
Explanation:
When ice cream melts from solid to liquid, the motion of the molecules increases. This is because as the phase change moves from solid to liquid to gas, entropy increases which increases the probability of the molecules to collide and move in the system. This increase may be because of the increase in temp, probable cause of the melting of icecream.
Answer:
0.56 M
Explanation:
Step 1: Given data
- Rate constant (k): 0.035 s⁻¹
- Initial concentration of the reactant ([A]₀): 1.5 M
Step 2: Calculate the amount of reactant ([A]) after 28 seconds
For a first-order kinetics, we will use the following expression.
ln [A] = ln [A]₀ - k × t
ln [A] = ln 1.5 - 0.035 s⁻¹ × 28 s
[A] = 0.56 M
