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3 years ago

The measure of how much force is acting on a given area is known as?

Chemistry

1 answer:

Morgarella [4.7K]3 years ago

3 0

Answer:

Pressure

Explanation:

Basically, Pressure equals Force, divided by the area.

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2. Why is the lonic compound Nacl (table salt) able to dissolve in a glass of the molecular compound water (H20)? (3 points)

melomori [17]

Answer:

The correct answer is C ions from the solute molecules have a strong attraction to the polar solvent molecules.

Explanation:

NaCl or Sodium chloride is an ionic compound which easily get dissolved in polar molecular compound such as water(H2O).

Both NaCl and H2O are polar compound because the atoms that forms NaCl and H2O have vast difference in their electronegativities.As a result the bonding electrons in both NaCl and H2O are not equally shared.

NaCl get dissolved in water molecules by dipole dipole interaction.

6 0

3 years ago

Using the ideas from this section and the periodic table, choose the more reactive nonmetal.

fiasKO [112]

Explanation:

Oxygen is a more reactive non-metal.

There are several parameters to test how reactive an element is. In this case, we are going to use the electronegativity of the two atoms.

Electronegativity is the relative tendency with which atoms of the element attract valence electrons in a chemical bond.

A high electronegativity value suggests more reactivity and a low value implies low reactivity.

On the Pauling's Eelectronegativity table, Oxygen has a value of 3.5 and Phosphorus has 2.1

It implies that oxygen is a more reactive non-metal compared to phosphorus.

Learn more:

Electronegativity brainly.com/question/11932624

#learnwithBrainly

6 0

3 years ago

Which of the following would have the smallest ionization energy? S Р K Ca

goldenfox [79]

Answer:

Explanation:

Ionization energy decreases from top to bottom and increases from left to right on the periodic table

4 0

3 years ago

What type of reaction is Ammonia (NH3) breaking down into nitrogen gas and hydrogen gas

Andru [333]

Answer:

Explanation:

Look at the reaction.

2NH3 ===> N2 + 3H2

It's a molecule that is breaking down to two elements on the periodic table. We used to call such a thing as a simple decomposition.

8 0

3 years ago

Ka/KbMIXED PRACTICE108.Calculate the [H3O+(aq)], the pH, and the % reaction for a 0.50 mol/L HCN solution. ([H3O+(aq)] = 1.8 x 1

NeTakaya

Answer:

a) [H₃O⁺] = 1.8x10⁻⁵ M

b) pH = 4.75

c) % rxn = 3.5x10⁻³ %

Explanation:

a) The dissociation reaction of HCN is:

HCN(aq) + H₂O(l) ⇄ H₃O⁺(aq) + CN⁻(aq)

0.5 M - x x x

The dissociation constant from the above reactions is given by:

$Ka = \frac{[H_{3}O^{+}][CN^{-}]}{[HCN]} = 6.17 \cdot 10^{-10}$

$6.17 \cdot 10^{-10} = \frac{x*x}{(0.5 - x)}$

$6.17 \cdot 10^{-10}*(0.5 - x) - x^{2} = 0$

By solving the above quadratic equation we have:

x = 1.75x10⁻⁵ M = 1.8x10⁻⁵ M = [H₃O⁺] = [CN⁻]

Hence, the [H₃O⁺] is 1.8x10⁻⁵ M.

b) The pH is equal to:

$pH = -log[H_{3}O^{+}] = -log(1.75 \cdot 10^{-5} M) = 4.75$

Then, the pH of the HCN solution is 4.75.

c) The % reaction is the % ionization:

$\% = \frac{x}{[HCN]} \times 100$

$\% = \frac{1.75 \cdot 10^{-5} M}{0.5 M} \times 100$

$\% = 3.5 \cdot 10^{-3} \%$

Therefore, the % reaction or % ionization is 3.5x10⁻³ %.

I hope it helps you!

6 0

3 years ago