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3 years ago

Which is classified as an inner transition element

Chemistry

2 answers:

Serhud [2]3 years ago

7 0

They include elements 57-71 (lanthanides) and 89-103 (actinides)

konstantin123 [22]3 years ago

6 0

<span>An inner transition metal is 1 of a group of chemical elements on the periodic table. They are often shown in two rows below all of the other elements.</span>

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If you burn 46.0 g of hydrogen and produce 411 g of water, how much oxygen reacted?

g100num [7]

The answer is 365 grams because you need to subtract 411 by 46.

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3 years ago

Consider these reactions:

Virty [35]

511.2 grams of chlorine gas consumed (with excess H-) when

1,342.0 kJ of energy is released from the system.

<h3></h3><h3>What is an exothermic reaction?</h3>

In thermochemistry, an exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative."

Given that 1 mole of chlorine releases -184.6 energy.

Then, we have to find the number of moles of chlorine when 1,342.0 kJ of energy is released from the system.

So, calculating number of moles of chlorine.

Moles = $\frac{-1,342.0 \;kJ}{-184.6\;kJ}$

Moles = 7.2 mole

Now, calculating number mass of chlorine.

$\rm Moles=\rm\frac{Mass}{Molar \;mass}$

Mass = 7.2 mole x 71 g/mole

Mass = 511.2 gram

Learn more about exothermic reaction here:

brainly.com/question/10373907

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2 years ago

Thinking and questioning is the start of the scientific inquiry process. Please select the best answer from the choices provided

aev [14]

Yes thats true! You always have to think about the question or project before you start a science experiment! :)

8 0

3 years ago

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Given the following equation, what is the correct form of the conversion factor needed to convert the number of moles of O₂ to t

djverab [1.8K]

Answer : The correct option is (c) $\frac{2\text{ mole of }Fe_2O_3}{3\text{ mole of }O_2}$

Explanation :

The given balanced chemical reaction is,

$4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)$

From the balanced chemical reaction, we conclude that

As, 3 moles of $O_2$ react to give 2 mole of $Fe_2O_3$

So, 1 mole of $O_2$ react to give $\frac{2\text{ mole of }Fe_2O_3}{3\text{ mole of }O_2}$ moles of $Fe_2O_3$

Thus, the conversion factor needed to convert the number of moles of $O_2$ to the number of moles of $Fe_2O_3$ produced is $\frac{2\text{ mole of }Fe_2O_3}{3\text{ mole of }O_2}$

Hence, the correct option is (c) $\frac{2\text{ mole of }Fe_2O_3}{3\text{ mole of }O_2}$

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3 years ago

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In general, what is the effect if increased temperature on the solubility of a gas

r-ruslan [8.4K]

Increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in the gas molecules which break intermolecular bonds and escape from solution.

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3 years ago