Define evaporation

Giving Brainliest​

The reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.

The reaction cell or the voltaic cell has been the one that has been able to convert electrical energy into chemical energy. In the chemical cell, electrical energy has been provided to the cell for bringing the chemical change.

The chemical change has been brought by the oxidation and reduction of the elements with the application of electric current. The reaction that has been based on the oxidation and reduction of the elements has been termed the redox reaction.

Thus, the reaction in the chemical cell has been best classified as the redox reaction. Thus, option B is correct.

For more information about the chemical cell, refer to the link:

https://brainly.com/question/995105

The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the gravitational force which points along the direction of the ball's motion can accelerate the ball. The other component pushes the ball into the ramp, and the ramp pushes back, so there is no acceleration of the ball into the ramp. If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. If the ramp is vertical, the ball just drops with acceleration due to gravity. These arguments are changed a bit by the fact that the ball is rolling and not sliding, but that only affects the magnitude of the acceleration but not the fact that it increases with ramp steepness.

Answer:

I will go for a heterogeneous mixture

Explanation:

alloy is basically a mixture

Answer:

Reaction Rate is the reaction rate or reaction is the speed at which chemical reaction takes place.

Rate constant is the chemical kinetics a reaction rate constant or reaction rate

Answer:

Explanation:

From the given information:

The two reactions occurring in the reactor are:

[tex]\mathtt{CH_3COOH + 2H_2 \to C_2H_5OH + H_2O}[/tex]

[tex]\mathtt{2C_2H_5OH \to (C_2H_5)_2O+H_2O}[/tex]

Let molar flowrate of [tex]\mathtt{CH_3COOH}[/tex] entering reactor = [tex]\mathtt{x_n}[/tex]

From the first reaction:

[tex]\mathtt{CH_3COOH + 2H_2 \to C_2H_5OH + H_2O}[/tex]

Since there is a 71.6% conversion of [tex]\mathtt{CH_3COOH}[/tex];

Then, amount of [tex]\mathtt{CH_3COOH}[/tex] remaining unreacted and exiting the reactor is:

= x - 0.716x

= 0.284x

Recall that; the component flow rate exiting the reactor = 3.81 mols

∴

0.284x = 3.81

x = 3.81/0.284

x = 13.42 moles

Thus, the molar flowrate of [tex]\mathtt{CH_3COOH}[/tex] entering the reactor is 13.42 moles

Answer:

The sample's volume at STP is 52.416 L.

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

Then you can apply the following rule of three: if 1 mole of a gaseous sample occupies 22.4 L, 2.34 moles how much volume does it occupy?

[tex]Volume=\frac{2.34 moles* 22.4 L}{1 mole}[/tex]

Volume= 52.416 L

The sample's volume at STP is 52.416 L.

Answer:

The volume of  5.0 g CO  2  is  2.6 L CO  2  at STP

Explanation:

STP

STP is currently  

0

∘

C

or  

273.15 K

, which are equal, though the Kelvin temperature scale is used for gas laws; and pressure is  

10

5

.

Pascals (Pa)

, but most people use  

100 kPa

, which is equal to  

10

5

.

Pa

.

You will use the ideal gas law to answer this question. Its formula is:

P

V

=

n

R

T

,

where  

P

is pressure,  

V

is volume,  

n

is moles,  

R

is a gas constant, and  

T

is temperature in Kelvins.

Determine moles

You may have noticed that the equation requires moles  

(

n

)

, but you have been given the mass of  

CO

2

. To determine moles, you multiply the given mass by the inverse of the molar mass of  

CO

2

, which is  

44.009 g/mol

.

5.0

g CO

2

×

1

mol CO

2

44.009

g CO

2

=

0.1136 mol CO

2

Organize your data

.

Given/Known

P

=

100 kPa

n

=

0.1136 mol

R

=

8.3145 L kPa K

−

1

mol

−

1

https://en.wikipedia.org/wiki/Gas_constant

T

=

273.15 K

Unknown:  

V

Solve for volume using the ideal gas law.

Rearrange the formula to isolate  

V

. Insert your data into the equation and solve.

V

=

n

R

T

P

V

=

0.1136

mol

×

8.3145

.

L

kPa

K

−

1

mol

−

1

×

273.15

K

100

kPa

=

2.6 L CO

2

rounded to two significant figures due to  

5.0 g

Answer link

Doc048

May 18, 2017

I got 2.55 Liters

Explanation:

1 mole of any gas at STP = 22.4 Liters

5

g

C

O

2

(

g

)

=

5

g

44

(

g

mole

)

=

0.114

mole

C

O

2

(

g

)

Volume of 0.114 mole  

C

O

2

(

g

)

= (0.114 mole)(22.4 L/mole) = 2.55 Liters  

C

O

2

(g) at STP

Answer: A

Explanation:

that temperature is saturated.

Answer:

277.0g of CO₂ is theoretical yield

Explanation:

In the reaction, 2 moles of C₄H₁₀ react with 8 moles of CO₂.

To solve this question, we must convert the volume of the C₄H₁₀to moles. Then, using the chemical reaction, find the moles of CO₂ produced and its mass as follows:

PV = nRT

Assuming STP conditions:

P = 1atm

V = 35.5L

n are moles

R = 0.082atmL/molK

T = 273.15K

Replacing:

n = PV/RT

n = 1atm*35.25L / 0.082atmL/molK*273.15K

n = 1.574 moles C₄H₁₀

Assuming all these moles are converted in CO₂ (theoretical yield), the moles of carbon dioxide are:

1.574 moles C₄H₁₀ * (8mol CO₂ / 2mol C₄H₁₀) = 6.295 moles CO₂

And the theoretical yield in mass is:

6.295 moles CO₂ * (44.01g / mol) =

Answer:

Balanced equations and mole ratios

In general, mole ratios can be used to convert between amounts of any two substances involved in a chemical reaction.

Explanation:

yw

Answer:

ask your mom and your family

Explanation:

tell your mom that she sucks

Answer:

its valnce electrons is 2 and the reaction to metal

Answer: 1.825 moles of hydrogen gas are produced.

Explanation:

The balanced chemical equation is:

[tex]Mg(s)+2HCl(aq)\rightarrow H_2(g)+MgCl_2(aq)[/tex]  

According to stoichiometry :

2 moles of [tex]HCl[/tex] require = 1 mole of [tex]Mg[/tex]

Thus 3.65 moles of [tex]HCl[/tex] will require=[tex]\frac{1}{2}\times 3.65=1.825moles[/tex]  of [tex]Mg[/tex]

Thus [tex]HCl[/tex] is the limiting reagent as it limits the formation of product and [tex]Mg[/tex] is the excess reagent.

As 2 moles of [tex]HCl[/tex] give = 1 mole of [tex]H_2[/tex]

Thus 3.65 moles of [tex]HCl[/tex] give =[tex]\frac{1}{2}\times 3.65=1.825moles[/tex]  of [tex]H_2[/tex]

Thus 1.825 moles of hydrogen gas are produced.

Explanation:

The bonding in Magnesium Bromide is ionic bonding. Ionic bonding occurs between metals and non metals, due to the transfer of electrons.

Strontium Sulphide is also an ionic compound. The metal is Strontium and the non metal is sulphur.

In terms of electrons, it is similar to Magnesium bromide in the sense that the metal lost two electrons and the non metal gained two electrons which is the same as in Magnesium Bromide.

Answer:

91

Fact box

Group Actinides 1572°C, 2862°F, 1845 K

Block f 15.4

Atomic number 91 231.036

State at 20°C Solid 231Pa

Electron configuration [Rn] 5f26d17s2 7440-13-3

Explanation:

Answer:

C

Explanation:

C

Aspects of horse anatomy evolved over millions of years to suit their

environment.

Evolution refers to the various ways and forms organisms developed

throughout the years. This is usually as a result of their adaptation to

different living conditions.

Horses were believed to be similar to dogs millions of years ago according

to discovered fossils but became taller  as a result of their adaptation to the

plains which they now lived in.

Read more about Horse here https://brainly.com/question/16331056

Answer:

d. supersaturated.

Explanation:

A solution naturally contains a solute and a solvent. The solute is the solid substance that dissolves in the solvent, which is usually a liquid substance. A solution has a maximum amount of solute that can dissolve in its constituent solvent.

However, when the amount of dissolved solute in a solution at a given temperature is greater than the amount that can permanently remain in the solution at that temperature, the solution is said to be SUPERSATURATED. This means that the solution contains more than the maximum amount of solute.

Answer:

78 : 71

Explanation:

From the question given above, the following data were obtained:

Mass of KCl = 149 g

Mass of K = 78 g

Mass ratio of K and Cl =?

Next, we shall determine the mass of Cl in the compound. This can be obtained as follow:

Mass of KCl = 149 g

Mass of K = 78 g

Mass of Cl =?

Mass of Cl = (Mass of KCl) – (Mass of K)

Mass of Cl = 149 – 78

Mass of Cl = 71 g

Finally, we shall determine the mass ratio of K and Cl. This can be obtained as follow:

Mass of K = 78 g

Mass of Cl = 71 g

Mass ratio of K and Cl =?

Mass ratio = mass of K / mass of Cl

Mass ratio = 78 / 71

Therefore, potassium, K and chlorine, Cl are released in mass ratio of 78 : 71

Answer:

The great age of continental rocks results from their inability to be subducted. ... We also know that the increase in age of ocean crust away from ocean basins results from creation of new sea floor at the MORs, with destruction of older sea floor at ocean trenches, which are often located near continental margins.

Explanation:

The age of the ocean crust used as evidence for plate tectonics because older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries. Therefore, option A is correct.

Plate tectonics is a theory because it supplies an explanation of why and how segments of the earth displace and make earthquakes and mountains and volcanos.

This states why ocean floor rocks are generally less than 200 million years old whereas the oldest continental rocks are more than 4 billion years old.

The great age of continental rocks effects from their inability to be subducted. We also know that the addition in age of ocean crust away from ocean basins results from activity of new sea floor at the MORs, with destruction of older sea floor at ocean trenches.

Thus, option A is correct.

To learn more about the plate tectonics, follow the link;

https://brainly.com/question/19317822

#SPJ2

Your question is incomplete, most probably your question was

Why is the age of the ocean crust used as evidence for plate tectonics?

A Older ocean crust is being melted back into the mantle at divergent boundaries.Older ocean crust is being melted back into the mantle at divergent boundaries.

B There are striations on the ocean crust where the continental crust moved over the top of it.There are striations on the ocean crust where the continental crust moved over the , top of it.

C Ocean crust is older than continental crust so it shows that the continents are younger.Ocean crust is older than continental crust so it shows that the continents are , younger.

D New ocean crust is being formed at underwater divergent boundaries pushing away older crust.

Answer:

a. mass of glucose required = 4.50 g

b. mass of glucose required = 0.05 g

c. mass of glucose required = 25g

Explanation:

1a. molar mass of glucose = 180.156 g/mol

volume of solution = 250 mL or 250 mL * 1 L/1000 mL = 0.25 L

concentration of solution = 100 mM or 100mM * 1 M/1000 mM = 0.10 M

amount in moles = mass/ molar mass = concentration * volume

mass in grams = concentration * volume * molar mass

mass = 0.10 * 0.25 * 180.156

mass of glucose required = 4.50 g

b. mass concentration of 0.05 % solution = 0.05 g/100 ml = 0.5 g/L

volume of solution = 100 mL = 0.1 L

mass in grams = mass concentration * volume

mass in grams =  0.5 g/L * 0.1 L

mass of glucose required = 0.05 g

c. mass concentration of solution = 50 mg/ mL = 0.05 g/ 0.001 L = 50 g/L

volume of solution = 500 mL = 0.5 L

mass of solute required = concentration * volume

mass required = 50 g/L * 0.5 L

mass of glucose required = 25g

Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as hematite contain iron(III) oxide, Fe2O3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.

Carbon is more reactive than iron, so it can displace iron from iron(III) oxide. Here are the equations for the reaction.

Step 1 – Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace.

C(s) + O2(g) → CO2(g)

Step 2 – More coke is added to the furnace and reduces the carbon dioxide into carbon monoxide, a good reducing agent.

CO2(g) + C(s) → 2CO(g)

Step 3 – iron(III) oxide is reduced.

iron(III) oxide + carbon → iron + carbon dioxide

2Fe2O3(s) + 3C(s) → 4Fe(l) + 3CO2(g)

In this reaction, the iron(III) oxide is reduced to iron, and the carbon is oxidized to carbon dioxide.

In the blast furnace, it is so hot that carbon monoxide can be used, in place of carbon, to reduce the iron(III) oxide:

iron(III) oxide + carbon monoxide → iron + carbon dioxide

Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)

More than you asked