Elements from which two families would most likely combine with each other to create salts?

Answers

Answer 1

Answer: Also could be an alkali metal (such as Na) and a halogen (such as Cl)

Answer 2

Answer: Metals and non metals

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Liquids and solids are left out of the equilibrium constant expression because their concentrations remain constant during reactions. What is the molarity concentration of liquid water at 25.0 LaTeX: ^\circ ∘C given that its density is 0.997 g/mL at that temperature? a.23.5 M b.0.997 M c.0.180 M d.0.156 M e.55.3 M

The saturation index for a pool measures the balance between the acid level and the amount of minerals in pool water. Balanced water has an index value of 0. Water is highly corrosive or highly scale forming if the absolute deviation of the index value from 0 is greater than 0.5. Find the index values for which pool water is highly corrosive or highly scale forming.

Answers

Answer: The water is highly corrosive when the saturation index < - 0.5 and

> 0.5

Explanation:

If the saturation index for a pool measures the balance between the acid level and the amount of minerals in pool water. Considering its balanced water has an index value of 0.

The water is highly corrosive when the saturation index < - 0.5 and

> 0.5

The attachment below shows the calculations.

If the pressure on an ideal gas is increased, what will happen to the volume of the gas?

Answers

If the pressure on an ideal gas is increased, the volume of the gas will decrease. This can be predicted with the use of the ideal gas equation which is expressed as: PV = nRT. At constant temperature, we can say that pressure and volume are inversely related. Thus, as one value increase, the other decrease.

450

Explanation:

edxdded gvt rgt gt tgrtrg

Which information about a chemical reaction is provided by a potential energy diagram?(1) the oxidation states of the reactants and products(2) the average kinetic energy of the reactants and products
(3) the change in solubility of the reacting substances
(4) the energy released or absorbed during the reaction

Answers

Answer: (4) the energy released or absorbed during the reaction

Explanation: Potential energy diagram is the representation of energy with the course of reaction. It shows the energy of reactants, activation energy which is the energy required by the reactants to cross the energy barrier and the energy of the products.

Thus the difference of energy of products and energy of reactants gives us the energy released or absorbed during the reaction.

$\Delta H=E_P-E_R$

where $\Delta H$ = enthalpy of reaction

$E_P$ = energy of products

$E_R$ = energy of reactants

If $E_P$ > $E_R$ , energy is absorbed and reaction is endothermic

$E_P$ < $E_R$ , energy is released and the reaction is exothermic.

D. The energy released or absorbed during the reaction

a beaker with water and the surrounding air are all at 24'C. after ice cubes are placed in the water, heat is transfered from

Answers

Heat is transferred from air to the ice cubes, so that's why ice cube melt.

#1. The arrangement of atoms at the peak of the activation energy barrier is known as the _____. A. activation rate B. activated complex C. transition state D. both B and C #2. Two opposing reactions (A + B C + D) occurring simultaneously at the same rate is an example of:A. reversibility./B. chemical equilibrium./C. neither a nor b/D. both a and b
#3. A substance that interferes with the action of a catalyst is known as a(n) _____.

A. negative inhibitor
/B. either an inhibitor or negative inhibitor /C. inhibitor /D. activated complex
#4. The reducing agent in the reaction described in Fe + 2HCl → FeCl2 + H2 is

A. Fe./B. HCl./C. FeCl2.

Answers

1) Answer is: D. both B and C.

Activated complex is collection of intermediate structures in a chemical reaction that forms while bonds are breaking and new bonds are forming.

The transition state is the configuration at the peak of the diagram while the activated complex can refer to any point near the maximum.

Activation energy is the minimum energy colliding particles must have in order to react.

2) Answer is: B. chemical equilibrium.

Balanced chemical reaction: A + B ⇄ C + D.

1) In a chemical reaction, chemical equilibrium is the state in which both reactants ( and BA) and products (C and D) are present in concentrations which have no further tendency to change with time.

2) At equilibrium, both the forward and reverse reactions are still occurring.

3) Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.

3) Answer is: C. inhibitor.

Inhibitor is a substance that decreases the rate of a chemical reaction.

Inhibitor can reduce the effectiveness of a catalyst in a catalysed reaction.

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst.

Reactions occur faster with a catalyst because they require less activation energy.

4) Answer is: A. Fe.

Balanced reaction: Fe + 2HCl → FeCl₂ + H₂.

Oxidation reaction: Fe⁰ → Fe⁺² + 2e⁻.

Reduction reaction: 2H⁺ + 2e⁻ → H₂⁰.

Reducing agent is an element or compound that loses an electron to another chemical species in a redox chemical reaction and they have been oxidized.

Iron (Fe) change oxidation number from 0 to +2 (lose electrons), iron is oxidized (reducing agent).

Answer :

1) The correct option is, (D) both B and C.

2) The correct option is, (D) both A and B

3) The correct option is, (C) inhibitor.

4) The correct option is, (A) Fe

Explanation :

For part 1 :

Activated complex or transition state : It is the state where the bonds are loosened and new lose bonds are formed between them. It is unstable state and immediately dissociates to form the stable products. The arrangement of atoms takes place at the peak of the activation energy barrier.

For part 2 :

The balanced chemical reaction is,

$A+B\rightleftharpoons C+D$

Chemical equilibrium : It is defined as a state where the rate of forward reaction is equal to the rate of backward reaction. That means there is no net change in the concentration of the reactants and the products.

Reversibility : It is defined as, in a reversible reaction when reactant A and B react to form products C and D and in the reverse reaction, C and D react to form A and B. That means process is reversible.

For part 3 :

Inhibitor : It is the substance that decreases the rate of the chemical reaction. It can reduce the effectiveness of the catalyst in a catalyzed reaction.

Or we can say that it is a substance that interferes with the action of a catalyst.

For part 4 :

The balanced redox reaction is :

$Fe+2HCl\rightarrow FeCl_2+H_2$

The half oxidation-reduction reactions are:

Oxidation reaction : $Fe\rightarrow Fe^(2+)+2e^-$

Reduction reaction : $2H^++2e^-\rightarrow H_2$

From this we conclude that the 'Fe' is the reducing agent that loses an electron to another chemical species in a redox chemical reaction and itself oxidized.

Hence, the reducing agent is, Fe

When a chemical reaction occurs, the physical and chemical properties of the reactants are the same as the properties of the products.True or False??

Answers

This statement would be false.

They would not be the same

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The molarity of an aqueous solution of NaCl is defined as the(1) grams of NaCl per liter of water (2) grams of NaCl per liter of solution (3) moles of NaCl per liter of water (4) moles of NaCl per liter of solution

PLEASE HELP CHEM BABES I HAVE BEEN CRYING FOR A WHILE NOW 1. Calculate the mass of nitrogen dioxide (NO2) present in a 0.831 L container if the pressure is 100 kPa at a temperature of 27 oC. R = 8.31 kPa x L / mol x K. (K = oC + 273). 2. A 33.2 L tank contains 280 g of compressed helium. If the pressure inside the tank is 700.0 kPa, what is the temperature of the compressed gas? You must convert the mass of helium into moles using the molar mass of He. The conversion factor will be 1 mol / molar mass of helium. R = 8.31 kPa x L / mol x K

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