Because we are moving at a constant rate (seeing as we're on earth and the earth is spinning) but the moon does not spin as it revolves around us, therefore we only see the one side of it.
Answer:
BARIUM HYDROXIDE IS THE COMPOUND
Answer:
a. True
Explanation:
From the basic concepts of acids and bases, we know that when a base accepts a hydrogen ion (H⁺), it forms a conjugate acid which can accept again the H⁺ ion:
B⁻ + H₂O ⇆ BH + OH⁻
The stronger the base, the weaker the conjugate base. Thus, as more strength has a base, lesser strength will have the conjugate base (it will not be able to accept again the H⁺ ion). For example, when water (H₂O) loses its H⁺ , it forms the conjugate base OH⁻. So, OH⁻ is the stronger base that can exist in an aqueous solution.
H₂O ⇆ H⁺ + OH⁻
In fact, strong bases are hydroxides, such as NaOH or KOH.
Answer:
13.1 L
Explanation:
Using the combined gas law:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
Based on the information provided in this question;
P1 = 1.95 atm
P2 = 0.65 atm
V1 = 5.0 L
V2 = ?
T1 = 20 °C = 20 + 273 = 293K
T2 = -15 °C = -15 + 273 = 258K
Using P1V1/T1 = P2V2/T2
1.95 × 5/293 = 0.65 × V2/258
9.75/293 = 0.65V2/258
0.0333 = 0.00252V2
V2 = 0.0333 ÷ 0.00252
V2 = 13.1 L
