17.The formation of steam above a pot of water is an example of condensation.
evaporation.
freezing.
melting.

18.If you were to pour into a container materials in all three phases of matter, which phase would most quickly spread out to fill the container?

Solid
Liquid
Gas
Evaporated

Answers

Answer 1

Answer: #1...Evaporation
#2....Gas

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Of the choices below, which is true for the relationship shown? a. It is Ka for the acid H3P2O72−. b. It is Kb for the acid H3P2O72−. c. It is Ka for the acid H2P2O72−. d. It is Kb for the acid H2P2O7

Answers

The expression for the Ka for the given acid is:

Ka = [H2P2O7^2-] [H3O+] /[H3P2O7^2-]

Ka is the acid dissociation constant or the acidity constant. It is a measure of the acid strength when in solution. It is an equilibrium constant for the dissociation of the acid.

Answer:

It is Ka for the acid H3P2O72−.

Explanation:

Mg(s) + 2HCI(aq) -> MgCl2(aq) + H2(g) a. How many grams of HCI are consumed by the reaction of 2.50 moles of magnesium? Given: Requested:

Answers

Answer:2.50 moles of magnesium will consume approximately 182.30 grams of hydrochloric acid in the given reaction.

Explanation:To find out how many grams of hydrochloric acid (HCl) are consumed when 2.50 moles of magnesium (Mg) react with it, you can use stoichiometry and the balanced chemical equation:

Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)

From the balanced equation, you can see that 1 mole of magnesium (Mg) reacts with 2 moles of hydrochloric acid (HCl).

Now, let's use this information to calculate the moles of HCl required to react with 2.50 moles of Mg:

Moles of HCl = (2.50 moles Mg) * (2 moles HCl / 1 mole Mg)

Moles of HCl = 2.50 moles * 2

Moles of HCl = 5.00 moles

Now that we know we need 5.00 moles of HCl, we can calculate the grams of HCl needed using the molar mass of HCl:

The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl):

Molar mass of HCl = 1.01 g/mol (for hydrogen) + 35.45 g/mol (for chlorine)

Molar mass of HCl = 36.46 g/mol

Now, calculate the grams of HCl:

Grams of HCl = (5.00 moles) * (36.46 g/mol)

Grams of HCl = 182.30 grams

So, 2.50 moles of magnesium will consume approximately 182.30 grams of hydrochloric acid in the given reaction.

Suggest one reason why hydrogen is called a "clean fuel"

Answers

Because there is no carbon, CO2 is not a product of its combustion, only water.

Consider a generic redox reaction?Consider a generic redox reaction X(s) + Y^+(aq) <----> X^+(aq) + Y(s) then suppose that the coefficients in the redox reaction are doubled. How will the following quantities be affected for a voltaic cell under nonstandard conditions? 1.Doubled 2. Halved 3. Squared 4. No Change The options are InQ, E^o, E, n, Q

Answers

The Nernst equation allows us to predict the cell potential for voltaic cells under conditions other than the standard conditions of 1M, 1 atm, 25°C. The effects of different temperatures and concentrations may be tracked in terms of the Gibbs energy change ΔG. This free energy change depends upon the temperature & concentrations according to ΔG = ΔG° + RTInQ where ΔG° is the free energy change under conditions and Q is the thermodynamic reaction quotient. The free energy change is related to the cell potential Ecell by ΔG= nFEcell

so for non-standard conditions
-nFEcell = -nFE°cell + RT InQ

or

Ecell = E°cell - RT/nF (InQ)

which is called Nernst equation.

Answer:

n and lnQ - doubled

Q - Squared

E, Edegree - No change

Is CI3 a compound or an element

Answers

Cl₃ is formed by thecombination of 3 chlorine atoms. Hence, not a single element and not a compound. Instead Cl₃ is a molecule of chlorine.

What are molecules ?

Molecules are the combination of atoms of same element or are the basic units of a compound. A compound is formed by the combination of two or more atoms of different elements.

The combination of atoms can be different bond types, such as ionic bond, covalent bond, hydrogen bonding etc. The type of bond is dependent on the nature of atoms.

Combination of same atoms in any number are forming the molecules of that element and not a compound. Hence, Cl₃ is a molecules and not element or compound.

Find more on compounds:

brainly.com/question/5526339

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Answer:

CI3 is a compound called carbon tetra iodide

Chemical A and Chemical B react in an exothermic reaction. What can be known about what will happen when Chemical A and Chemical B are mixed together?The new substance will need more energy to form its chemical bonds than the old substance will release.
More energy will be released from the old substance than the new substance will need to form its chemical bonds.
The color will change as a result of the reaction.
The substance will bubble as a result of the reaction.