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3 years ago

The study of all chemicals containing carbon

Chemistry

2 answers:

Klio2033 [76]3 years ago

8 0

Answer:

Organic chemistry

Explanation:

laila [671]3 years ago

6 0

The correct answer is
<span>3. Organic Chemistry.....</span>

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Why are significant figures NOT important when solving problems in your math class?

Alex Ar [27]

They're not important when solving math problems in class because you need to get the correct and accurate answers hence don't need to change them into significant figures

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3 years ago

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Rus_ich [418]

Answer:

Tundra

Explanation:

In physical geography, tundra is a type of biome where the tree growth is hindered by low temperatures and short growing seasons.

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3 years ago

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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

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3 years ago

Name a metal and non metal which are liquid at normal pressure and temperature<br>

liraira [26]

Answer:

metal : Mercury(Hg)

non metal : bromine (Br)

Explanation:

mercury is liquid at room temperature and pressure and the same as bromine

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2 years ago

Which element is least likely to react with other elements

Anni [7]

Nobles gases, since they all have 8 e- on their last layer of electrons.

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3 years ago

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