Answer:
The hydroxyl groups in alcohol molecules are responsible for hydrogen bonding between the alcohol molecules. As greater energy is required to overcome these strong intermolecular forces, the melting points and boiling points of alcohols are higher than those of alkanes with a corresponding chain length
Answer:
A standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
All the data is given in the question and these are as follows:-
Moles - 0.75
Na - 6.022*10^{23
The formula we are using to find the molecules is as follows:-
n = \frac{molecule}{Na}n=
Na
molecule
After, putting the value and solving it. we will get
0.75 * 6.022*10^2^3 = 4.5165*10^{23
Explanation:
As it is given that W = = 28.9 lbf
Mass is given as 30.0 lbm
Now, calculate as follows.
=
= 0.9633 lbf/lbm
Since, it is known that 1 lbf = lbm \times . Therefore, local gravity (g') will be calculated as follows.
=
Thus, we can conclude that the value of local gravity is .
Answer:
Na₂SO₄•(H₂O)₆.
Explanation:
<em>The mass that is lost when the sample is heated is water.</em>
Let's assume we have 100 g of the hydrate:
43 grams would be water (H₂O), while the rest (100-43=57) would be sodium sulfate anhydrous (Na₂SO₄).
We <u>convert both those masses to moles</u>, using their <em>respective molar masses</em>:
- H₂O ⇒ 43 g ÷ 18 g/mol = 2.39 mol
- Na₂SO₄ ⇒ 57 g ÷ 142.04 g/mol = 0.40 mol
We can write those results as (Na₂SO₄)₀.₄₀•(H₂O)₂.₃₉. Now we just need<u> to multiply those numbers so that they become integers.</u>
If we multiply both coefficients by 5 we're left with (Na₂SO₄)₂•(H₂O)₁₂.
<u>Simplify </u>and thus the final answer is Na₂SO₄•(H₂O)₆.