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Answer:

B Reaction happens in both directions.

Answer:

B. Reaction happens in both directions!

Explanation:

Dynamic equilibrium is reached once a reaction becomes reversible -- meaning that, when a reaction is in dynamic equilibrium, the forward reaction rate and the backward reaction rate, are equal or occurring at the same time!

Equilibrium is really just like saying they're [the reactions] at a point where they're both "balanced" and so they're equal, nothing is changing and they're going equally both ways!  (This is just for explanatory reasons, but "balanced" isn't the correct term to use for dynamic equilibrium, as it is used for other things in Chemistry!)

Hope this helps a little! [And that I didn't confuse you!] :)

Answer: C Right, and the concentration of HBr(g) will decrease

Since it is an endothermic reaction the equilibrium will shift to the right direction i.e. product side decreasing concentration f HBr.

In the case when the temperature is increased so here the equilibrium should be shifted to the right and the concentration of HBr(g) will decrease.

The given reaction represent the endothermic reaction since it absorb the heat.

So in the case when there is endothermic reaction so here there should be increase in temperature since the reaction should goes forward direction and the concentration of HBr(g) will decrease.

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Answer:

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water.

Explanation:

The solution is the result of the mixture between the solute, which is the substance that dissolves, and the solvent, which is the substance in which a solute dissolves. That is, a solution (or solution) is a mixture of two or more components, perfectly homogeneous since each component is intimately mixed with the other.

The concentration of solutions is the amount of solute contained in a given amount of solvent or solution. A unit of concentration is the percent weight to volume.

The percent weight to volume is the percentage ratio between the weight of the solute and the volume of the solution. It is calculated as:

[tex]Percent =\frac{mass of solute}{volume of solution} *100[/tex]

Mass is measured in grams, while volume is measured in mL.

In this case:

Replacing:

[tex]6=\frac{12 g}{volume of solution} *100[/tex]

Solving:

volume of solution*6= 12 g*100

[tex]volume of solution=\frac{12 g}{6} *100[/tex]

volume of solution= 200 mL

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water

Answer:

4.65 moles

Explanation:

1 mole ---> 6.022×10²³ atoms of si

X mole ---> 2.8×10²⁴ atoms of si

X= 2.8×10×10²³/6.022×10²³

=28/6.022

=4.65moles

Answer:

everything can be found in the picture

Answer:

The mass of solid copper chloride used in each experiment=15 g

Explanation:

We are given that

Mass of copper chloride in solution=300g/dm3

Volume of solution used in each experiment=50 cm3

We have to find the mass of solid copper chloride used in each experiment.

[tex]1cm^3=0.001 dm^3[/tex]

[tex]50cm^3=0.05 dm^3[/tex]

1 dm3 contained solid copper chloride=300 g

0.05 dm3 contained solid copper chloride=[tex]300\times 0.05[/tex]g

0.05 dm3 contained solid copper chloride=15 g

Hence, the mass of solid copper chloride used in each experiment=15 g

Answer:

Nonpolar Covalent Bond

Explanation:

A nonpolar covalent bond is one in which the bonding electrons are evenly distributed between the two atoms.

Good Luck!

Hope this helps!

:)

Answer:

[tex]{ \bf{from \: ionic \: product \: of \: water : }} \\ { \boxed{ \tt{k _{w} = [H _{3} O {}^{ + } ][OH {}^{ - } ]}}} \\ \\ { \tt{1 \times {10}^{ - 14} = (1 \times {10}^{ - 5} ) [OH {}^{ - } ]}} \\ \\ { \tt{[OH {}^{ - } ] = 1 \times {10}^{ - 9} }} \: M[/tex]

A solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

The water is made up of H2O only and when the pH of it is 7 then the concentration of all the ions would be the same while dissociation the water will get dissociate into H+ ions and OH- ions.

The concentration of OH- ions will be

OH- = Kw {H3O+}

{H3O+} = 1 × 10−5 M.

Kw = 14

substituting the value in the equation,

OH = 14 { 1 × 10−5 M.}

OH = 1 × 10−9 M

Therefore, the solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

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Answer:

Kₑq = [H₂]² [O₂] / [H₂O]²

Explanation:

We'll begin by defining equilibrium constant for a reaction. This is given below:

The equilibrium constant for a given reaction is defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

With the above information in mind, we shall determine the equilibrium constant for the reaction given in the question above. This is illustrated below:

2H₂O (g) <=> 2H₂ (g) + O₂ (g)

Kₑq = [H₂]² [O₂] / [H₂O]²

Answer: The statement it is a weak acid is true for the substance.

Explanation:

An acid that dissociates completely when dissolved in water to give hydrogen [tex](H^{+})[/tex] or hydronium [tex](H_{3}O^{+})[/tex] ions is called a strong acid.

For example, HCl is a strong acid.

[tex]HCl + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}[/tex]

An acid that dissociates partially or weakly when dissolved in water to given hydrogen or hydronium ions is called a weak acid.

For example, [tex]CH_{3}COOH[/tex] is a weak acid.

[tex]CH_{3}COOH \rightleftharpoons CH_{3}COO^{-} + H_{3}O^{+}[/tex]

A strong base is a base which when dissolved in water then it dissociates completely to give hydroxide ions.

For example, NaOH is a strong acid.

A weak base is a base which when dissolved in water then it dissociates partially or weakly to give hydroxide ions.

For example, [tex]NH_{3}[/tex] is a weak base.

Hence, in an aqueous solution where 42% of a substance dissociates to release hydronium ions shows that the dissociation is less than 50%. This means that substance is dissociating weakly so, it is a weak acid.

Thus, we can conclude that the statement it is a weak acid is true for the substance.

Answer:

It is a weak acid.

Explanation:

I took the test :)

Answer:

The strength of an individual H bond depends on the polarity of the H-X bond and therefore on the electronegativity of X ( the more delta positive the H atom, the stronger the electrostatic force of attraction between it and a lone pair of electrons). Thus, on a per bond basis, HF H bonding is strongest. However, as water has two H atoms, each molecule can form two H bonds so on a per molecule basis, water H bonding is strongest (this is evidenced by the boiling points of the three substances; NH3 < HF < H2O.)

Explanation:

Correct me if I'm wrong

Answer:

They grow slowly over time, they are made up of multiple organisms.

Explanation:

One polyp is one individual. A Coral is made up of several polyps. Each polyp is less than 1 centimeters but a coral is made of many polyp so the coral itself cant be 1 centimeters across.

Answer:

2 molL ^ -1

Explanation:

Masa de soluto = 8 g

volumen de solución = 100 mililitros o 0,1 L

Número de moles de solución = masa / masa molar = 8g / 40g / mol = 0,2 moles

concentración = número de moles / volumen

concentración = 0.2 / 0.1

= 2 molL ^ -1

Answer:

The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.

Explanation:

Answer: The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.

Explanation:

The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent. 103 Paraffin wax is soluble in: a) water; b) hexane; c) acetone; d) ethanol Is shopping bag (polyethylene)

hope it helps

Answer:

Waves carry energy from one place to another.

Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.

Explanation:

i hope it helps

that's my answer

correct me if im wrong

The electron structures of hydrogen (H) and lithium (Li) are similar as " they both have 1 electron in an s sublevel".

The quantum theory defines a sublevel as an energy level. Sublevels in chemistry refer to the energy caused by electrons. Sublevels can also relate to energy caused with the nucleus in physics.

It is know that the atomic number of hydrogen is 1 and the atomic number of lithium is 3.

The electronic configuration of H = [tex]1s^{1}[/tex].

The electronic configuration of Li = [tex]1s^{2} 2s^{1}[/tex].

Its can be seen that hydrogen and lithium both posses 1 electron in s sublevel

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Answer:

In the periodic table element Y is known as Yttrium and the Atomic number is 39. And the group is Transition Metal

Answer:

Particles are constatantly moving and diffusing

This is possible because of diffusion

Explanation:

Hope this helps

Answer:B

Explanation:

Answer:

Gamma rays—3 and radio waves—2

Explanation:

hard time seeing question, but i believe it is Gamma rays—3 and radio waves—2

Answer:

Most oxidation-reduction (redox) processes involve the transfer of oxygen atoms, hydrogen atoms, or electrons, with all three processes sharing two important characteristics: (1) they are coupled—i.e., in any oxidation reaction a reciprocal reduction occurs, and (2) they involve a characteristic net chemical change— .

Electrons will be transferred during redox reaction.

The electron is subatomic particles which are placed in surrounding the nucleus. Electrons carry negative charge.

Redox reaction involve the transfer of electrons between intermediates. A redox reaction occurs when the oxidation states of the substrate change. The removal of electrons or even a rise in the oxidation state of such a chemical or its atoms is referred to as oxidation. The acquisition of electrons or a lowering in the oxidation number of a chemical or the atoms inside it is referred to as reduction.

Hence the answer will be electron

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for a clear understanding of how closely they are related, scientists compare their DNA, an essential molecule that's the instruction manual for building each species. Humans and chimps share a surprising 99 percent of their DNA.

Answer:

Oxygen group element, also called chalcogen, any of the six chemical elements making up Group 16 (VIa) of the periodic classification—namely, oxygen (O), sulfur (S), selenium (Se), tellurium (Te), polonium (Po), and livermorium (Lv). ... Modern version of the periodic table of the elements (printable).

Answer:

B

Explanation:

Neutralisations are always double replacement reactions

Answer:

Vaporization

Since the question does not specify what molecule is being acted upon by the increment in temperature, I'll assume it's water.

When first taken out of the fridge, water is in the form of ice, and it has not been affected by a change in temperature yet, so it's at the origin.

(origin = ice)

As you raise the temperature, however, the ice starts to melt, and melting occur during phase 2. You have to keep the temperature constant for the process to properly occur.

(phase 2 = melting)

After it finishes melting, the ice is now in it's liquid state, which is water. The temperature continues to rise in order to proceed to the next phase.

(2nd slope = water)

Lastly, Water is being vaporized during phase 4. Notice, the temperature is kept constant in order to allow the process to properly occur.

(phase 4 = vaporization)

Explanation:

bc they are avocado.. and brown