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bixtya [17]
2 years ago
11

A student performed an investigation at sea level. First she placed 400 mL of water in four different containers. Then she place

d the containers on hot plates with four different temperature settings, as shown in the table.
Which characteristic of water remained the same in each container?

A. the shape of the water

B. the rate of evaporation

C. the boiling point of water

D. the amount of steam released per minute
Chemistry
1 answer:
Pachacha [2.7K]2 years ago
4 0
The answer is b your welcome
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When is balance achieved between the forward and reverse reactions?
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Equilibrium occurs when forward and reverse directions of a reversible reaction occur at the same rate so there is no overall change in the amounts of reactants and products.

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a _____ is a new substance formed in a chemical reaction. a. product b. coefficient c. catalyst d. reactant
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A Product is a new substance formed in a chemical reaction
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A city's water supply is contaminated with a toxin at a concentration of 0.63 mg/L. For the water to be safe for drinking, the c
Shalnov [3]

Answer:

Approximately 22.37 days, will it take for the water to be safe to drink.

Explanation:

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

k is rate constant

Given that:- k = 0.27 (day)⁻¹

[A_0] = 0.63 mg/L

[A_t]=1.5\times 10^{-3} mg/L

Applying in the above equation as:-

1.5\times 10^{-3}=0.63e^{-0.27\times t}

63e^{-0.27t}=150\times \:10^{-3}

e^{-0.27t}=\frac{1}{420}

t=\frac{100\ln \left(420\right)}{27}=22.37

<u>Approximately 22.37 days, will it take for the water to be safe to drink.</u>

7 0
3 years ago
I need someone to help with the bonus.
siniylev [52]

Answer:

268.3 m/sec

Explanation:

7 0
4 years ago
The 54.9-g sample of the compound X2O7 contains 33.6 g of oxygen atoms. What is the molar mass of element X?
vazorg [7]
Mass of X₂O₇ = 54,9g

2x + 33,6g = 54,9g
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7 0
3 years ago
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