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3 years ago

Choose the most alkaline substance in the group.

Chemistry

2 answers:

slava [35]3 years ago

6 0

Answer:

milk of magnesia, pH = 10.5

Explanation:

Rufina [12.5K]3 years ago

4 0

Answer:

The correct answer is option D.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ion concentration in the aqueous solution.

$pH=-\log[H^+]$

$pH\propto \frac{1}{[H^+]}$

Higher the value of hydrogen ion concentration lower will be the value of pH and more acidic will be the solution.
Lower the value of hydrogen ion concentration higher will be the value of pH and more alkaline will be the solution.

The most alkaline substance will have higher value of pH.

So, from the given option mil magnesia has highest value of pH with 10.5 which makes is most alkaline from the other given options.

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A binary ionic compound is known to contain a cation with 51 protons and 48 electrons. The anion contains one-third the number o

7nadin3 [17]

Answer:

$SbCl_3$

Explanation:

The cation contains 51 protons and 48 electrons. The electrons are only lost not protons, so the element which corresponds to atomic number 51 is the cation which is Antimony (Sb).

Also, the charge on the cation is 51 - 48 = 3

This is because neutral atom contains the same number of electrons as protons.

Given the anion has one-third protons as cation which means thta:

Number of protons in anion = $\frac {51}{3}=17$

This corresponds to chlorine atom. The electrons are 1 greater than protons means that it has gain 1 electron.

So,

Sb Cl

3 1

Cross multiply the valency.

So, formula is $SbCl_3$

4 0

3 years ago

Determine how many moles are present in 0.23kg of SO(2)

Rama09 [41]

Answer:

3.59 moles

Explanation:

Hopefully this helps! :)

Mark as brainliest if right!

6 0

4 years ago

A supposedly silver crown is tested to determine its density. it displaces 10.7 ml of water and has a mass of 112 g. part a coul

Anni [7]

The volume of water displace by crown is 10.7 mL. This will be equal to the volume of crown. Mass of crown is 112 g.

Density of a substance is defined as mass of substance per unit volume. It is mathematically represented as follows:

$d=\frac{m}{V}$

Putting the values,

$d=\frac{112 g}{10.7 mL}=10.46 g/mL$

The theoretical value of density of silver is $10.5 g/cm^{3}$ also, 1 mL is equal to $1 cm^{3}$ thus, density will be 10.5 g/mL.

This is approximately equal to the calculated value thus, the crown is made up of silver.

4 0

4 years ago

What happens if you pour water in baking soda? Does it release energy? What kind?

alexandr1967 [171]

Answer:

When baking soda or sodium Bicarbonate (NaHCo3) reacts with water carbonic acid is formed . The reaction is exothermic (so yes releases energy) that is heat (type of energy released) and Carbonic acid are produced. Carbonic acid is unstable so breaks up into carbon dioxide (which is the fizzy gas you see) and water forms.

Explanation:

5 0

4 years ago

2 2. The energy stored in a substance that can be released when the substance reacts. A. Mechanical Energy B. Thermal Energy C.

vichka [17]

Answer:

C. Chemical Energy

Explanation:

The energy that stored in the substance or in compounds is called chemical energy which released when the substance reacts.

A substance is made up of atoms and molecules and chemical energy is present in those atoms or molecules. When a chemical reaction takes place, these energy released from atoms and molecules.

Chemical energy can be released in the form of thermal energy (heat) and mechanical energy (working ability).

Hence, the correct answer is "C. Chemical Energy".

4 0

3 years ago