Answer: The answer is either A or C. I'm leaning more towards A.
Answer: It was known as the SPACE RACE.
Explanation: The space race was a cold war between the Soviet Union (USSR) and the United States (US), to get satellites and humans into space. The competition began in earnest on August 2, 1955, when the Soviet Union responded to the US announcement. On April 12, 1961, the USSR surprised the world again by launching Yuri Gagarin into a single orbit around the Earth in a craft they called Vostok 1.
Answer:
Explanation:
<u>1) Equilibrium equation (given)</u>:
- H₂ (g) + I₂ (g) ⇄ 2HI (g)
<u>2) Equilibrium constant expression</u>:
<u>3) Determine the conentrations from the stoichiometry</u>:
a) <u>Number of moles</u>:
H₂ (g) + I₂ (g) ⇄ 2HI (g)
Start 0.4 1.55 0
Change - 0.4×0.6 = - 0.24 - 0.24 + 0.24×2 = + 0.48
--------------------------- ------------- --------------------------
End 0.16 1.31 0.48
b) <u>Concentrations</u>:
- [ H₂ (g) ] = 0.16 mole / 2 liter = 0.08 M
- [ I₂ (g) ] = 1.31 mole / 2 liter = 0.655 M
- [HI (g) ] = 0.48 mole / 2 liter = 0.24 M
<u>4) Compute Kc</u>:
- Kc = (0.24 M)² / (0.08 M × 0.655 M) = 1.099 ≈ 1.1 ← answer
The easiest way to approximate ph level is the ph paper because there are no exprimentation required and it is very handy. so it is the best way to approximate the ph level of a lake, especially when you are outdoors, and it is just an initial reading of the ph. so ph paper will do.
Answer:
3.333M
Explanation:
Basically,
Molarity=(moles of solute)/(litres of solution)
=(0.5 moles)/(150/1000)L
=3.333M