Guess how many water molecules self-ionize in one liter of water! a) 7 moles b) 1 mole c) 10,000,000 moles d) 0.0000001 moles​

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:

CH4, methane is a non polar compound whereas CH3Cl is a polar compound because of presence of electronegative element chlorine. Hence, there is a net dipole moment in case of CH3Cl( Chloromethane). This causes CH3Cl to exhibits dipole-dipole intermolecular force of attraction, which is absent in CH4. Therefore, Chloromethane has a lower vapor pressure when compared to methane.  

Answer:

barium sulfate

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.

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that temperature is saturated.

2 Ca + 2H2O ⇒ 2 Ca(OH)2 + H2

Explanation: number of atoms of every element

Need to be equal in both sides

The right ratio of chemicals for the balanced chemical equation is  2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

A chemical equation must be balanced. This is so that it can convey how many moles are reacting and creating. The amount of electrons that are transferred from one substance to another is also indicated. An equation that balances or is balanced also describes how energy is changed.

Thus, the balanced chemical equation is  2Ca + 2H₂O ⇒ 2 Ca( OH )₂ + H₂.

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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:

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:

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:

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:

True

Explanation:

Answer:

I will go for a heterogeneous mixture

Explanation:

alloy is basically a mixture

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:

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.

The given question is incomplete. The complete question is:

A brick has a mass of 4.0 kg and the earth has a mass of [tex]6.0\times 10^{27}g[/tex] Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of bricks? Round your answer to 2 significant digits. How many moles of bricks have a mass equal to the mass of the Earth? Round your answer to 2 significant digits.

Answer: The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]

2.5 moles of bricks have a mass equal to the mass of the Earth

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

Mass of 1 brick = 4.0 kg = 4000 g     (1kg=1000g)

Thus mass of 1 mole of brick or [tex]6.023\times 10^{23}[/tex] bricks will be = [tex]\frac{4000g}{1}\times 6.023\times 10^{23}=2.4\times 10^{27}g[/tex]

The mass of 1 mole of bricks is [tex]2.4\times 10^{27}g[/tex]

Now [tex]2.4\times 10^{27}g[/tex] will correspond to = 1 mole of bricks

[tex]6.0\times 10^{27}g[/tex] will correspond to =[tex]\frac{1}{2.4\times 10^{27}}\times 6.0\times 10^{27}=2.5moles[/tex]

2.5 moles of bricks have a mass equal to the mass of the Earth

Answer:

False

Explanation:

Not all of it but some of it. Hope this helps! (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧

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.

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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.

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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:

yqujsbr

Explanation:

hejsudh2ihdg4 they t sjh5c4uSvreju5 aur bd84kskythddok6vr for

The change which shift the equilibrium to produce the maximum possible amount of SO₃ is decreasing the temperature.

According to this principle if any external stress is applied in the equilibrium state then equilibrium will shift towards that side where the external stress will decreases.

In the given chemical equation energy is releases in the form of heat, then in this condition:

Hence decreasing the temperature will produce maximum SO₃.

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Answer:

-2070 kJ

Explanation:

Answer:

How fans work....Instead of sucking in hot air and pushing it down, the fan sucks up cool air and pushes it higher. When the fan forces cool air higher, the cool air forces warm air down. Instead of giving you more access to cool air in your room, the fan gives you more access to the warm air, making you feel nice and cozy.

What fans do....A fan, or a breeze, helps by replacing this hot, humid air with cooler, drier air that allows for more evaporation. Similarly, even without sweat, our body loses heat to the surrounding air simply by convection. ... The breeze from the fan carries that hot air away and perpetuates the process, effectively cooling you off.

Explanation:

Answer:

its valnce electrons is 2 and the reaction to metal

In H4SiO4, the mole ratio of carbon to hydrogen to oxygen is the same as described in the question. Therefore H4SiO4 is the empirical formula

I hope this helps you!!

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:

720 divided by 2 answer is 556 so answer per is 3.32.3

Explanation:

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:

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