plz help me get it right no links

Answer:

2.0371352212585085

Explanation:

Answer:

Electron loss is always associated with an increase in oxidation number- True

An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products.  True

The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change. True

Explanation:

Oxidation implies loss of electrons. When a specie looses electrons, its oxidation number increases. For instance; Fe(s) -----> Fe^2+(aq) + 2e implies an increase in oxidation number of Fe from 0 to +2.

In an exothermic reaction, the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products.

We do not include the concentrations of pure liquids and pure solids in the equilibrium constant expression because the concentration of these do not change significantly throughout the reaction.

here's your solution

==> distance covered = 6 km

==> time taken = 30 min

==> time in hour = 30/60 = 1/2hr

= speed = distance/time

==> speed = (6)/(1/2)

==> speed = 12 km/hr

hope it helps

When a dog run 6 km in 30 minutes then dogs average speed will be 12 km/h.

The average speed of something is computed by dividing the number distance travelled by the total time it took to travel that distance. Average speed can be determined by the formula:

V=d/T

where, V is average speed , d is distance and T is time.

It is given that , d= 6 km and T= 30 minutes(0.5 h).

Calculation of average speed is show below:

Now, puts the value of given data in average speed formula.

Average speed(V )= 6/ 0.5 = 12 km/h

To know more about average speed .

https://brainly.com/question/7359669.

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Answer:

....

Explanation:

Answer:

Explanation:

Answer: D

STRONG ACIDS:

HBr

HCl

HI

HNO3

HClO4

H2SO4

Answer: The balanced chemical equation is [tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex] and it is a decomposition chemical reaction.

Explanation:

A chemical reaction in which single compound is decomposed into two or more species is called a decomposition reaction.

For example, [tex]NaNO_{3}(s) + Heat \rightarrow NaNO_{2}(s) + O_{2}(g)[/tex]

As the compound [tex]NaNO_{3}[/tex] is decomposing to given two different substances. So, it is a decomposition reaction.

Here, the number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

To balance this equation, multiply [tex]NaNO_{3}[/tex] by 2 on reactant side and multiply  [tex]NaNO_{2}[/tex] by 2 on product side. Therefore, the equation will be rewritten as follows.

[tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex]

Here, number of atoms on reactant side are as follows.

The number of atoms on product side are as follows.

Hence, this equation is balanced.

Thus, we can conclude that the balanced chemical equation is [tex]2NaNO_{3}(s) + Heat \rightarrow 2NaNO_{2}(s) + O_{2}(g)[/tex] and it is a decomposition chemical reaction.

Answer:

Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. For a smooth surface, reflected light rays travel in the same direction.

Explanation:

Answer:

b i think im not fully sure

Explanation:

Answer:

C- Both isolation and low population

Explanation:

90 percent sure

Answer:

9

[tex]4X \: + \: 3Y _{2} \: → \: 2X _{2} Y _{3}[/tex]

Sum = 4+3+2

=9

Answer:

hsbdgjvejsnshns gzjs svshs

Answer:

0.055M

Explanation:

Using the formula as follows:

CaVa = CbVb

Where;

Ca = concentration of acid (M)

Cb = concentration of base (M)

Va = volume of acid (mL)

Vb = volume of base (mL)

According to the information given in this question, Ca (HCl) = ?, Cb (NaOH) = 0.150, Va (HCl) = 86.30mL, Vb (NaOH) = 31.75mL

Using CaVa = CbVb

Ca = CbVb ÷ Va

Ca = (0.150 × 31.75) ÷ 86.30

Ca = 4.7625 ÷ 86.30

Ca = 0.055M

Answer:

• Abogado

• Administrador o conservacionista de campo

• Agrícola o agrónomo

• Apiculturísta

• Arquitecto

• Arquitecto ambiental

• Asistente de investigación

• Astrónomo

• Bioquímico

• Científico animal

• Científico avícola

• Científico de suelo

• Consejero vocacional

• Contador

• Criador animal

• Economista

• Entomólogo

• Epidemiólogo

• Farmacólogo

• Físico

• Fitogenetista

• Forestal

• Genetista

• Geoquímico

• Geofísico

• Horticultor

• Ingeniero

• Matemático (incluyendo estadístico)

• Meteorólogo

• Nutriólogo

• Profesor

• Químico

• Silviculturiasta (incluyendo forestalista)

• Terapeuta recreativo

• Topógrafo

• Trabajador social

• Urbanista (incluyendo geógrafo)

• Zoologísta

• Técnico científico de cualquiera de las siguientes disciplinas: ciencias agrícolas, astronomía, biología, química, ingeniería, silvicultura, geología, geofísica, meteorología o física

Explanation:

Answer:  Molecular Formula is C5H5

Explanation:   M(CH) = 13.018 g/mol

 Empirical formula of compound is (CH)x in which x = 2,3,4,...

   Molar mass of the substance is 65 g.   x = 65 g/mol : 13 g/mol = 5

Answer: Mn3C is the corrects answer

Trust me :)

Answer:

Part A

pH ≈ 2.273

Part B

ΔpH ≈ -4.726

Part C

pH ≈ 1.973

Part D

ΔpH ≈ -0.301

Explanation:

Part A

The pH of a solution is given by the negative concentration of hydrogen ions in the solution

2.0 mL = 0.002 L

The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;

1 Liter of 4.0 M HCl contains 4.0 moles of HCl

2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl

The concentration of 0.008 moles in 1.50 L is given as follows;

Concentration = The number of moles/(The volume in liters)

∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)

∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl

Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;

The number of moles of [H⁺] in the solution = 0.00533 moles

The pH of the solution = -log[H⁺]

∴ pH = -log[5.33 × 10⁻³] ≈ 2.273

The pH of the 1.5 L of pure water will be approximately 2.273

Part B

The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273

The change in pH is ΔpH = 2.274 - 7 = -4.726

ΔpH ≈ -4.726

Part C

When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;

C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²

The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter

The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973

Part D

The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.

Answer:

5.875 g of Oxygen

Explanation:

We must first balance our decomposition equation KClO3 -> K + ClO3

The amount of oxygen in CLO3 is 3 times the original. We begin by converting 15g of KClO3 to moles. 15 / (39.1 + 35.45 + 3(16) ) = 0.122 mols.

Then we go to moles of oxygen,

.122 * 3 = 0.367 mols of Oxygen

Then to grams of Oxygen

.367 * 16 = 5.875 g

Answer: There are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Explanation:

According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of every substance.

Hence, the number of molecules present in 4.6 moles of ammonium nitrate are calculated as follows.

[tex]4.6 \times 6.022 \times 10^{23}\\= 27.701 \times 10^{23} molecules[/tex]

Thus, we can conclude that there are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Answer:

An acid because they donate H^+ ions

Explanation:

Let us look at the equation again;

H2SO3 + H2O « H3O+ + HSO3-

An acid donates hydrogen ion while a base accepts hydrogen ion. Hence, we have to look at which species that acted as hydrogen ion donors or acceptors.

We can clearly see that H2SO3 acted as a hydrogen ion donor while H2O acted as a hydrogen ion acceptor.

Thus, H2SO3  acted as an acid by donating hydrogen ions.

Answer:

__3__parasitism-Ticks can attach to the skin of humans or other mammals.  The ticks feed on the blood to grow.

__1__mutualism-Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant.

__2__commensalism-Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.

Explanation:

The word that describes each statement would be mutualism, commensalism, and parasitism respectively.

It is a form of interaction involving two organisms of different species.

There are different types of symbiotic interactions:

More on symbiotic relationships can be found here:https://brainly.com/question/3350498

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Answer:

D

Explanation:

Answer:

hey,the answer is d, 1:2

Answer: D

Explanation:

The equation shows that one mole of nitrogen reacted with three moles of hydrogen to produce two moles of ammonia.

Answer:

amını sike bilirim tabi verirsen

Answer:

[tex]4molNH_3[/tex]

Explanation:

Hello there!

In this case, according to the given information it will be firstly necessary to set up the chemical equation taking place:

[tex]N_2+3H_3\rightarrow 2NH_3[/tex]

We infer we need to calculate the moles of NH3 by using both of the moles of N2 and H2 at the beginning, in order to identify the limiting reactant:

[tex]n_{NH_3}=6molN_2*\frac{2molNH_3}{1molN_2}=12molNH_3\\\\ n_{NH_3}=6molH_2*\frac{2molNH_3}{3molH_2}=4molNH_3\\[/tex]

Thus, since hydrogen yields the fewest moles of ammonia, we conclude that we are just able to yield 4 moles of NH3.

Regards!

Answer:

Is there a picture To go with this?

Explanation:

Answer:

A

Explanation:

It's not moving so it would be going 0 meters per second

Answer:

I think its A

Explanation: