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2 years ago

What is the most reactable element in periodic table

Chemistry

2 answers:

Olenka [21]2 years ago

7 0

The sodium metal is the most reactive element in the periodic table.

<h3 /><h3>What is alkali metals?</h3>

Alkali metals are metals found in the group of 1 of the periodic table.

Examples of metals found in group 1 in decreasing order of reactivity;

Sodium
Potassium
Lithium

The most reactive element in periodic table is found in the group 1 of the periodic table and this element is sodium.

Thus, sodium metal is the most reactive element in the periodic table.

Learn more about reactivity of elements here: brainly.com/question/2029679

nadya68 [22]2 years ago

3 0

Answer:

sodium

Explanation:

Mark me as a brain list pls

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Changes in ________ move matter from one state to another.

kipiarov [429]

Temperature. Water is an example. When water is at room temp. its liquid. When water is at boiling temp. It is a gas. And when water is at freezing temp. Its a solid.

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3 years ago

Read 2 more answers

Commercial hydrochloric acid (HCl) is typically labeled as being 38.0 % (weight %). The density of HCl is 1.19 g/mL. a) What is

Strike441 [17]

<u>Answer:</u>

<u>For a:</u> The molarity of commercial HCl solution is 12.39 M.

<u>For b:</u> The molality of commercial HCl solution is 16.79 m.

<u>For c:</u> The volume of commercial HCl solution needed is 2.42 L.

<u>Explanation:</u>

We are given:

Mass % of commercial HCl solution = 38 %

This means that 38 grams of HCl is present in 100 grams of solution.

To calculate the volume of solution, we use the equation:

$Density=\frac{Mass}{Volume}$

Density of HCl solution = 1.19 g/mL

Mass of solution = 100 g

Putting values in above equation:

$1.19g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=84.034mL$

<u>For a:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Molarity of solution = ?

Molar mass of HCl = 36.5 g/mol

Volume of solution = 84.034 mL

Mass of HCl = 38 g

Putting values in above equation, we get:

$\text{Molality of commercial HCl solution}=\frac{38\times 1000}{36.5\times 84.034}\\\\\text{Molality of commercial HCl solution}=12.39M$

Hence, the molarity of commercial HCl solution is 12.39 M.

<u>For b:</u>

To calculate the molality of solution, we use the equation:

$Molarity=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

$m_{solute}$ = Given mass of solute (HCl) = 38 g

$M_{solute}$ = Molar mass of solute (HCl) = 36.5 g/mol

$W_{solvent}$ = Mass of solvent = 100 - 38 = 62 g

Putting values in above equation, we get:

$\text{Molality of commercial HCl solution}=\frac{38\times 1000}{36.5\times 62}\\\\\text{Molality of commercial HCl solution}=16.79m$

Hence, the molality of commercial HCl solution is 16.79 m.

<u>For c:</u>

To calculate the molarity of the diluted solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted solution

We are given:

$M_1=6M\\V_1=5.00L\\M_2=12.39M\\V_2=?L$

Putting values in above equation, we get:

$6\times 5=12.39\times V_2\\\\V_2=2.42L$

Hence, the volume of commercial HCl solution needed is 2.42 L.

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3 years ago

A solution with a pOH of 6.92 has an [OH−] concentration of____

o-na [289]

Answer:

It is: 1.2x10⁻⁷

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3 years ago

What is the mass of 99.0 L of NO2 at STP?

vekshin1

Mass of NO₂= 203.32 g

<h3>Further explanation</h3>

Given

99.0 L of NO₂

Required

Mass of NO₂

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So mol NO₂ :

= 99 : 22.4

= 4.42

Mass :

= mol x MW

= 4.42 x 46 g/mol

= 203.32 g

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3 years ago

Which of the following DOES NOT have 2 significant

Butoxors [25]

Significant figures are the digits that come after the first non-zero digit. The second value has 11 significant figures and is therefore the correct answer. However, the fourth answer has 4 significant figures and would also be a correct answer. So I don’t know if perhaps there has been a typo or a mistake in the question but with what you have provided here, both these answer have more than 2 significant figures.

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3 years ago

What is the most reactable element in periodic table​

What is the most reactable element in periodic table