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3 years ago

Which uses of iron are due to its chemical properties? Select two options.

Chemistry

2 answers:

MaRussiya [10]3 years ago

6 0

Answer:

A.producing colored sparks in fireworks

C.rusting in the presence of water and oxygen

Explanation:

i just did this

kondaur [170]3 years ago

5 0

Answer:

producing colored sparks in fireworks and rusting in the presence of water and oxygen

Explanation:

yeet

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fish tank initially contains 35 liters of pure water. Brine of constant, but unknown, concentration of salt is flowing in at 5 l

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Therefore, the rate of change in the amount of salt is $\frac{dx}{dt} =( 5c}{ - \frac{x }{20})$

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Initial volume of water $V = 35$ lit

Flowing rate = 5 $\frac{Lit}{min}$

The rate of change in the amount of salt is given by,

$\frac{dx}{dt} =$ ( Rate of salt enters tank - rate of sat leaves tank )

Since tank is initially filled with water so we write that,

$x(0) = 0$

Let amount of salt in the solution is $c$ ,

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