CHEMISTRY HIGH SCHOOL

The Brønsted-Lowry theory defines an acid as a(n)a. hydrogen ion donor.
b. hydrogen ion acceptor.
c. electron-pair donor.
d. electron-pair acceptor.

Answers

Answer 1
Answer: Letra A. Doador de H+

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The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?covalent bonds hydronium ions electron pairs hydroxide ions
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If you have 3 moles of FeCl3, how many moles of MgCl2 can be produced? FeCl3 + Mg --> MgCl2 + Fe PLEASE ANSWER

Answers

Answer: 154.09 g

Explanation:

3 Mg + 2 FeCl3 = 3 MgCl2 + 2 Fe

The mass of MgCl2 produced is calculated:

m MgCl2 = 175 g FeCl3 * (1 mol FeCl3 / 162.2 g) * (3 mol MgCl2 / 2 mol FeCl3) * (95.21 g MgCl2 / 1 mol) = 154.09 g

Ayala is making salad dressing. She mixes oil and vinegar in a blender until a smooth consistency is formed. Explain whether this is a heterogeneous or a homogeneous mixture and why.

Answers

The correct answer would be homogeneous mixture. There are two types of mixture depending on the distribution of the components in the mixture. Homogeneous mixtures are mixtures which has uniform properties all throughout the mixture. For this case, the mixture of oil and vinegar had already achieved a uniform consistency.
Correct Answer: Mixture will be heterogeneous

Reason: 
The mixture is said to be homogenous, if it contains single phase, On other hand, heterogenous system has, multiple phases. When, oil and vinegar are mixed together, on standing, the two liquids separates out as different phases. Hence, the mixture will be refereed as heterogeneous. 

What type of bond is formed between a metal and a nonmetal?Select one:
a. Metallic
b. Ionic
c. Nonpolar covalent
d. Polar covalent

Answers

the answer is b. ionic

For a particular reaction, ΔH = -144.6 kJ and ΔS = -301.2 J/K. Calculate ΔG for this reaction at 298 K.

Answers

The Gibbs free energy change for this reaction at 298 K is approximately -54,484.8 J.

Determining the Gibbs free energy change

Calculating the Gibbs free energy change (ΔG) for a reaction at a given temperature using the Gibbs-Helmholtz equation,

ΔG = ΔH - TΔS

ΔG = (-144,600 J) - (298 K)(-301.2 J/K)

ΔG = -144,600 J + 90,115.2 J

ΔG = -54,484.8 J

ΔG = -54,484.8 J

Converting to kilojoules:

ΔG = -54,484.8 J / 1,000

= -54.48 kJ

Learn more on Gibbs free energy change here brainly.com/question/13765848

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To calculate, I would need to know if the final answer is supposed to be in kJ or in J/K.

Either way, use the Gibb's Formula: 
ΔG= ΔH-TΔS

If the final answer is supposed to be in J/K then plug-in your values to the formula and simply solve.

However, if your final answer is supposed to be in kJ, your first step would be to convert ΔS from J/K into kJ. 

This is simply done by dividing the given ΔS by 1000 ----> (-301.2/1000).
(we divide by 1000 because by definition that's what a "kilo" is )

New ΔS value= -0.3012 kJ 

Now all you have to do is plug-in all the values into the formula. 
ΔG= ΔH-TΔS
ΔG= (-144.6 kJ) - 298K(-0.3012kJ)
= -54.84 kJ 

Since the ΔG is negative, this means that the reaction is spontaneous. 

Hope this helps! :)

When the forward rate of reaction is greater than the reverse rate of reaction, the reaction has reached a state of balance called chemical equilibrium. True False

Answers

The correct answer is false. It is not chemical equilibrium when the forward rate of reaction is greater than the reverse rate of reaction. Instead, these two rates should be equal to achieve chemical equilibrium.

A beaker with water and the surrounding air are all at 24°C. After ice cubes are placed in the water, heat is transferred from:(1) the ice cubes to the air
(2) the beaker to the air
(3) the water to the ice cubes
(4) the water to the beaker

Answers

The answer is (3) the water to ice cubes.

As the ice cubes should be at a temperature of about 0 degree ( freezing point) , at the same time the temperature of water is 24 degree. Thus, heat is transferred from water to ice cubes.
(3) the water to the ice cubes
  This is so because the ice cubes are colder compared to their surrounding objects.
They absorb the heat from the water, cooling it, therefore vanishing(melting).
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