How much salt (NaCl) is carried by a river flowing at 30.0 m3/s and containing 50.0 mg/L of salt? Give your answer in kg/day.
1 answer:
Answer:
129,600kg/day
Explanation:
The river is flowing at 30.0
1 = 1000L
Multiply by 1000 to convert to L/s
flowrate of river = 30*1000 =30,000L/s
Convert L/s to litre per day by multiplying by 24*60*60
flowrate of river = 30,000 * 24*60*60 L/day
= 2,592,000,000L/day
if the river contains 50mg of salt in 1L of solution
lets find how many mg of salt (X) is contained in 2,592,000,000L/day
X=
X= 129,600,000,000 mg/day
convert this value to kg/day by multiply by
X= 129,600kg/day
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Answer : The activation energy for the reaction is, 119.7 J
Explanation :
According to the Arrhenius equation,
or,
where,
= rate constant at 271 K
= rate constant at 281 K =
= activation energy for the reaction = ?
R = gas constant = 8.314 J/mole.K
= initial temperature = 271 K
= final temperature = 281 K
Now put all the given values in this formula, we get:
Therefore, the activation energy for the reaction is, 119.7 J
Answer:
The CSI is wrong.
Explanation:
1. Find the volume of the pool
The formula for the volume of a cylinder is V = πr²h .
D = 12 m; h = 10 m
r = D/2 = (12 m/2) = 6.0 m
V = πr²h = π × (6.0 m)² × 10 m = π × 36 m²× 10 m = 360π m³ = 1100 m³
= 1.1. × 10⁶ L
2. Calculate the moles of OH⁻
n = cV = 1.0 × 10⁻² mol·L⁻¹ × 1.3 × 10⁶ L = 11 000 mol of OH⁻
3. Calculate the moles of acetic acid needed for neutralization
HA + OH⁻ ⟶ A⁻ + H₂O
The molar ratio of is 1 mol HA:1 mol OH⁻, so you need 11 000 moL of acetic acid.
4. Calculate the actual moles of acetic acid
You have four 5 L jugs of acetic acid pH 2 .
Volume = 20 L
[H⁺] = 10⁻² mol·L⁻¹ = 0.01 mol·L⁻¹
(a) Set up an ICE table
HA + H₂O ⇌ A⁻ + H₃O⁺
I/mol·L⁻¹: c 0 0
I/mol·L⁻¹: - 0.01 +0.01 +0.01
I/mol·L⁻¹: c - 0.01 0.01 0.01
(b) Calculate the concentration of acetic acid
The concentration of the acetic acid is 6 mol·L⁻¹
(c) Calculate the moles of acetic acid
You have 100 mol of acetic acid.
The CSI is wrong.
You don't have enough acetic acid to neutralize the pool.
