Match the equation with the appropriate description.

What is the independent variable in the graph?

n200080 [17]

It is c because I did it already

5 0

3 years ago

Write the precipitation reaction for cobalt(II) hydroxide in aqueous solution: Be sure to specify the state of each reactant and

Len [333]

Answer:

The equation for the precipitation reaction of cobalt (ii) hydroxide is given below:

CoSO₄ (aq) + NaOH (aq) ----> Co(OH)₂ (s) + Na₂SO₄ (aq)

Explanation:

Cobalt (ii) hydroxide is an inorganic compound consisting of cobalt (ii) ions, Co²+ and hydroxide ions, OH-. It is insoluble in water and the pure form known as the beta form is a pink-coloured solid. The impure form which incorporates other anions in its molecular structure is blue in colour and is ustable.

Cobalt (ii) hydroxide is formed as precipitate when an alkaline metallic hydroxide such as sodium hydroxide is mixed with an aqueous cobalt (ii) salt such as cobalt (ii) sulfate. The equation for the precipitation reaction of cobalt (ii) hydroxide is given below:

CoSO₄ (aq) + NaOH (aq) ----> Co(OH)₂ (s) + Na₂SO₄ (aq)

Being a basic hydroxide, cobalt (ii) hydroxide neutralizes acids to form cobalt (ii) salts and water. For example: Co(OH)₂ (s) + H₂SO₄ (aq) ---> CoSO₄ (aq) + H₂O

Thus, cobalt (ii) hydroxide is soluble in acids.

Cobalt(II) hydroxide is used mostly as a drying agent for paints, varnishes, and inks. It is also useful in the preparation of other cobalt compounds.

7 0

3 years ago

Which list places the layers of the sun in the correct order from innermost to outermost? Corona, photosphere, chromosphere Phot

Savatey [412]

Answer:

Layers of sun from inner to outermost layer-

Core<Radiative Zone<Convection Zone<Photosphere<Chromosphere<Transition Zone<Corona

Explanation:

The Sun is comprised of 7 layers, of which 3 forms the inner layers and 4 forms the outer layers.

The inner layers are namely-

Core- It is the innermost layer of the sun where the energy is produced by nuclear fusion process and the temperature is significantly high, about millions of degree celsius. Here, the hydrogens are combined in order to form helium .

Radiative zone- This is the zone through which the energy is radiated by the photon from the core outward in the form of electromagnetic radiation that usually takes more than about 170,000 years to radiate.

Convection zone- This layer starts from the interior of about 200,000 kilometers extending up to the visible surface of the sun. The temperature in this zone is extremely high but comparatively less than the core. The energy emitted from the core is then radiated through this zone. Here, the convection cells are generated due to the continuous heating and cooling of heated materials.

The outer layers of sun are as follows-

Photosphere- This layer is considered as the solar surface which is mostly concealed by the presence of granulations, that are initiated by the bubbles of gases formed in the convection zone and also presence of sunspots that are formed due to the stronger magnetic field. The temperature ranges here from 4000° to 6500°K.

Chromosphere- Here, the temperature rises extensively as one goes away from the sun and the temperature in this layer ranges from 4000° to a maximum of 8000°K.

Transition region- It is a thin layer which is about 60 miles only where the temperature highly increases from about 8000° to 500,000°K. The reason behind this increase in temperature is yet to be discovered.

Corona- It is the outermost layer where the temperature range is from 500,000° K to 1,000,000° K. This layer is difficult to be seen with the naked eye but can be seen using a coronagraph telescope during the time of solar eclipse.

8 0

3 years ago

Read 2 more answers

Un atleta se dirige hacia la línea de salida a 6 m/s. Cuando pasa por la marca de 100 m, ponemos el cronómetro en marcha. Escrib

Romashka [77]

Answer:

Los parámetros dados del movimiento son;

La velocidad con la que el atleta se dirige hacia la línea de salida = 6 m / s

El punto en el que se inicia el cronómetro = marca de 100 m

La ecuación para la distancia recorrida, 's', se da como sigue;

s = 6 m / s × t

La distancia total recorrida, d = 100 + s

∴ d = 100 + 6·t

Los gráficos de las ecuaciones se crean con Microsoft Excel y se presentan de la siguiente manera;

Explanation:

4 0

3 years ago

I really need help with this ASAP

Norma-Jean [14]

Answer:

1) Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.

2) By collecting the hydrogen gas that is produced over water or in a syringe, rate graphs can be produced. The volume of gas produced and the time taken need to be recorded. The rate of the same reaction could be monitored by measuring the change in the mass of reactants as they react to form products.

6 0

3 years ago