Answer:
569K
Explanation:
Q = 3.5kJ = 3500J
mass = 28.2g
∅1 = 20°C = 20 + 273 = 293K
∅2 = x
c = 0.449
Q = mc∆∅
3500 = 28.2×0.449×∆∅
3500 = 12.6618×∆∅
∆∅ = 3500/12.6618
∆∅ = 276.4220
∅2 - ∅1 = 276.4220
∅2 = 276.4220 + ∅1
∅2 = 276.4220 + 293
∅2 = 569.4220K
∅2 = 569K
Answer: Option (a) is the correct answer.
Explanation:
The stream that flows during or after the rainfall is called an ephemeral stream. This stream occurs in areas where there is less rainfall or deficiency of moisture.
The stream that flows only in flat lands is called as river.
Mechanical weathering results in the breaking of rocks causes ice wedging.
Chemical weathering results in the change in molecular structure of rocks and soil.
Thus, it can be concluded that option (a) is the correct answer.
Answer:
compaction and cementation.
Answer:
pH = 12.6
Explanation:
The HF reacts with LiOH as follows:
HF + LiOH → LiF + H₂O
To solve this question we need to find the moles of each reactant:
<em>Moles HF:</em>
0.1500L * (0.20mol / L) = 0.030 moles HF
<em>Moles LiOH:</em>
0.600L * (0.10mol / L) = 0.060 moles LiOH
That means there is an amount of LiOH in excess, that is:
0.060 mol - 0.030 mol = 0.030 moles LiOH
In 600.0mL + 150.0mL = 750.0mL = 0.750L
The molarity of LiOH is:
0.030 moles LiOH / 0.750L =
0.040M LiOH = [OH⁻]
As:
Kw = 1x10⁻¹⁴ = [H⁺] [OH⁻]
1x10⁻¹⁴ = [H⁺] [0.040M]
2.5x10⁻¹³M = [H⁺]
As pH = -log [H⁺]
<h3>pH = 12.6</h3>
<h2>.An oily cell membrane.</h2>
Hope it is Helpful to you