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2 years ago

Noclouttrio -inta ………………….!.!.!!..!

Chemistry

1 answer:

Ronch [10]2 years ago

4 0

Answer:

3 more brlst

Explanation:

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a _______ is a substance that comes out of solution when 2 clear liquids are mixed which is a sign of a _____ change.

Lena [83]

Answer:

precipitate , chemical

Explanation:

a precipitate is is an insoluble solid that forms when two solutions are combined and react chemically. The two clear colorless liquids is a chemical change because a different solid substance is formed

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2 years ago

All of the following are examples of suspensions except what?:

artcher [175]

Dust particles in the air

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2 years ago

Select all of the ways collection areas use to gain water. precipitation falls direction into the collection area runoff from pr

MrRissso [65]

The answer will be A & B not only because it makes sense but evaporation is taking water away not adding to (gaining)

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2 years ago

It is known that the kinetics of recrystallization for some alloy obey the Avrami equation andthat the value of n in the exponen

Paul [167]

Answer:

rate of recrystallization = 4.99 × 10⁻³ min⁻¹

Explanation:

For Avrami equation:

$y = 1-e ^{(-kt^n)} \\ \\ e^{(-kt^n)} = 1-y\\ \\ -kt^n = In(1-y) \\ \\ k = \dfrac{-In(1-y)}{t^n}$

To calculate the value of k which is a dependent variable for the above equation ; we have:

$k = \dfrac{-In(1-0.40)}{200^{2.5}}$

$k = 9.030 \times 10 ^{-7}$

The time needed for 50% transformation can be determined as follows:

$y = 1-e ^{(-kt^n)} \\ \\ e^{(-kt^n)} = 1-y\\ \\ -kt^n = In(1-y) \\ \\ t =[ \dfrac{-In(1-y)}{k}]^{^{1/n}}$

$t_{0.5} =[ \dfrac{-In(1-0.4)}{9.030 \times 10^{-7}}]^{^{1/2.5}}$

= 200.00183 min

The rate of reaction for Avrami equation is:

$rate = \dfrac{1}{t_{0.5}}$

$rate = \dfrac{1}{200.00183}$

rate = 0.00499 / min

rate of recrystallization = 4.99 × 10⁻³ min⁻¹

8 0

3 years ago

Which of the following is not part of the proper protocol for using acids and bases?

Anni [7]

Answer:

B.Add acid to water,not water to acid

Explanation:

they should not be mixed

8 0

2 years ago