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3 years ago

What caused the bonding of two atoms which undergo an ionic bond?

1 answer:

8 0

C. As we know, an atom is made of three parts--protons (+), neutrons (core), and electrons (-) When one of these atoms loses one or more electron(s), it becomes a cation, or a positively charged ion. Inversely, when this atom gains a positively charged ion, [the atom] becomes a negatively charged atom, or an anion. The bond is made through electrostatic attraction, and a bond between these two "halves of a whole", it is known as an ionic bond.

annoyedfish1542

2 years ago

what

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Vesnalui [34]

Answer:

145.8g

Explanation:

Given parameters:

Number of moles of magnesium hydroxide = 2.5mol

Unknown:

Mass of Mg(OH)₂ = ?

Solution:

To solve this problem we use the expression below;

Mass of Mg(OH)₂ = number of moles x molar mass

Molar mass of Mg(OH)₂ = 24.3 + 2(16 + 1) = 58.3g/mol

Mass of Mg(OH)₂ = 2.5 x 58.3 = 145.8g

3 0

2 years ago

What temperature will the water reach when 10.1 g CaO is dropped into a coffee cup containing 157 g H2O at 18.0°C if the followi

Zepler [3.9K]

Answer:

Final temperature attained by water = 34.6°C

Explanation:

The reaction of CaO and H₂O is an exothermic reaction. The equation of reaction is given below:

CaO + H₂O ----> Ca(OH)₂

The quantity of heat given off, ΔH°rxn = 64.8KJ/mol = 64800J/mol

Number of moles of CaO = mass/molar mass, where molar mass of Ca0 = 56g/mol, mass of CaO = 10.1g

Number of moles of CaO = 10.1g/56g/mol =0.179moles

Quantity of heat given off by 0.179 moles = 64800 *0.179 = 11599.2J/mol

Using the formula, Quantity of heat, q = mass * specific heat capacity * temperature rise.

mass of mixture = (10.1 + 157)g = 167.1g, Initial temperature = 18.0°C

Final temperature(T₂) - Initial temperature(T₁) = Temperature rise

11599.2J/mol = 167.1g * 4.18J/g·°C * ( T₂ - 18.0°C)

11599.2 = 698.478T₂ - 12572.604

11599.2 + 12572.604 = 698.478T₂

698.478T₂ = 24171.804

T₂ = 34.6°C

Therefore, final temperature attained by water = 34.6°C

6 0

3 years ago

How many more atomic orbitals does a d sublevel hold than a p sublevel? 2 4 6 8

irakobra [83]

It can hold 4 minutes more electrons.

8 0

3 years ago

Determine the correct metric length of the cockroach in this image

Reika [66]

Answer:

were is the image

Explanation:

7 0

3 years ago

Calculate the pH of 0.005 methonoic acid solution given that the degree of dissociation is 0.057

BigorU [14]

Answer:

pH = 2.77

Explanation:

Data Given:

degree of dissociation Ka = 0.057

Concentration of Methanoic acid = 0.005 M

pH = ?

Solution:

First we calculate Hydrogen ion concentration

Formula will be used

[H⁺] = $\sqrt{Ka . c}$ . . . . . . (1)

where

Ka = degree of dissociation

c = concentration

Put values in formula 1

[H⁺] = $\sqrt{0.057 * 0.005M}$ . . . . . . (1)

[H⁺] = 0.0017 M

Now Calculate the pH

As we know

pH = -log [H⁺] . . . . . .(2)

Put values in equation

pH = - log [ 0.0017 M]

pH = - [-2.77]

pH = 2.77

So,

pH of methanoic acid = 2.77

5 0

3 years ago