Which symbol in a chemical equation separates the reactants from the products ?

Answer:

43

a) 6.730 x 10^-4

b) 5.0 x 10^4

c) 3.010 x 10^-6  

44

a) 7050. g

b) 40000500. mg

c) 2350.0 mL

Answer:

133.333333333 cm^3

Explanation:

Volume = Mass/Density

Answer:

3)low pressure and high voltage

Answer:

Gas, Solid, or liquid

Explanation:

When two liquids are mixed in a test tube, a precipitate forms and the test tube feels cold to the touch. This is an exothermic reaction.

Exothermic refers to chemical reactions that release energy. When bonds are created in the products of exothermic processes, more energy is produced than is required to break the bonds between the reactants. The temperature of the reaction mixture rises as a result of exothermic reactions.

The temperature of the reaction mixture rises as energy is released in an exothermic process. In an endothermic reaction, the temperature drops as energy is absorbed. A thermometer can be inserted into the reaction mixture to track temperature changes.

Thus, it is an exothermic reaction.

To learn more about exothermic reaction, follow the link;

https://brainly.com/question/10373907

#SPJ1

Frequency – The frequency of a wave is the number of waves that pass a given point in a certain amount of time. Frequency is measured in units called hertz (Hz), and is defined as the number of waves per second. A wave that occurs every second has a frequency of 1 wave per second (1/s) or 1 Hz.

Answer:

it's -C......................

Answer:

Sulfur

Explanation:

it has 16 proton and 2- charges

The most accurate value for the boiling point of water is about 102°.

The term accuracy refers to the fact that the value is close to the accepted or the true value. The term precision refers to how closely bound together the values in a replicate measurement are.

Having said that, we can see that the most accurate value for the boiling point of water is about 102°. In the case of second question, the table is not shown hence the question can not be answered.

For the third question, we know that the value of the load that the roller coaster can carry is 1686.5 kg, when the sign says that the roller coaster can carry as much as 1700 kg, the roller coaster could become overloaded and become harder to move.

Learn more about roller coaster:https://brainly.com/question/19920727

#SPJ1

During pearlite transformation the temperature drops down to 600 degree C and it occurs in the Eutectic point.

What is phase diagram?

Graphical representations of the phases that exist in an alloy under various temperature, pressure, or chemical composition conditions are called phase diagrams.

The graphic illustrates the necessary elements for the equilibrium of two or more phases. A site where water can coexist in three different phases at once is described as a "triple point" in the water phase diagram, for instance. This occurs at a temperature of 0.01 °C and an atmospheric pressure of 0.006.

The pearlite transformation happens when the temperature changes from 675 degree C to 600 degree C. The point where which the transformation occurs is called as Eutectic point.

Eutectic point - A junction of several phases is known as a eutectic point. In the iron-carbon alloy diagram, the intersection of lines A1, A3, and ACM is known as the eutectic point. These points happened to develop at the same time.

To know more about phase diagrams click here,

https://brainly.com/question/1612862

#SPJ4

To form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

The compound Al2O3, commonly known as aluminum oxide, is formed when two aluminum atoms and three oxygen atoms bond. To determine the number of total electrons that must be transferred to form one formula unit of Al2O3, we first need to find the number of electrons that are present in one formula unit of Al2O3.

Aluminum has an atomic number of 13, which means it has 13 protons and 13 electrons in a neutral atom. Each aluminum atom in Al2O3 contributes 3 electrons, and since there are two aluminum atoms in one formula unit of Al2O3, the total number of electrons contributed by aluminum atoms is 6.

Oxygen has an atomic number of 8, which means it has 8 protons and 8 electrons in a neutral atom. Each oxygen atom in Al2O3 contributes 2 electrons, and since there are three oxygen atoms in one formula unit of Al2O3, the total number of electrons contributed by oxygen atoms is 6.

Therefore, to form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

To learn more about electrons click on the given link:

https://brainly.com/question/860094

#SPJ11

The percentage of theoretical air used is approximately 190.3%.

To determine the percentage of theoretical air used in the combustion of 1 kg of butane (C4H10), we need to calculate the amount of air required for complete combustion and compare it to the actual amount of air used.

The balanced chemical equation for the combustion of butane is:

\(C_4H_{10} + 13/2 O_2 - > 4 CO_2 + 5 H_2O\)

This means that for every mole of butane that is burned, 13/2 moles of oxygen are required. The molar mass of butane is 58.12 g/mol, so 1 kg of butane is equivalent to 17.20 moles.

Therefore, the amount of oxygen required for complete combustion of 1 kg of butane is:

(13/2) mol O_2/mol butane x 17.20 mol butane = 111.4 mol O_2

Next, we need to calculate the amount of air required for complete combustion. Air is approximately 21% oxygen and 79% nitrogen by volume. Therefore, the volume of air required for complete combustion is:

111.4 mol O_2 / (0.21 mol O2/mol air) = 530.5 mol air

Assuming ideal gas behavior, the volume of air at 30°C and 90 kPa can be calculated using the ideal gas law

PV = nRT

where P is the pressure (90 kPa), V is the volume, n is the number of moles of air, R is the gas constant, and T is the temperature in Kelvin (303 K).

V = nRT/P = (530.5 mol x 0.08206 L atm K^-1 mol^-1 x 303 K) / (90 kPa x 101.3 kPa/atm) = 12,425 L

Therefore, the percentage of theoretical air used in the combustion of 1 kg of butane is:

(actual air used / theoretical air required) x 100%

= (25,000 g air / 12,425 L) / (530.5 mol air / 1 kg butane) x 100%

= 190.3

So, the percentage of theoretical air used is approximately 190.3%. This value is greater than 100% because the actual amount of air used is more than the theoretical amount due to the excess nitrogen present in air.

To learn more about : theoretical

https://brainly.com/question/14714924

#SPJ11

Answer:

Well, it´s dangerous because it displaces oxygen in the blood and deprives the heart, the brain and other vital organs.

Explanation:

What i mean by that is that breathing carbon monoxide reduces the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. It can also causes E.g. dizziness, confusion, unconsciousness and even death.

I hope this answered yor question, if i did misundertood the question do tell me and i will try my best to explain it. Have a nice day!! :)

Answer:

Explanation:

Well the gas is the fuel for the flame of course. The collision theory comes into play when the gas turns on, chemicals collide with one another. Then  reactions occur causing the flame. Then when you take away the fuel, the flame stops because there is no atoms or molecules to come together/collide with one another.

Sorry if its wrong or doesn't make sense... Wish you the best of luck on whatever your doing!

The flame go out on the Bunsen burner when the gas is turned off because there is no collision between the molecules of the gas.

A Bunsen burner can be defined as a small, adjustable laboratory equipment that is used to produce a single but continuously open gas flame, especially by mixing a flammable gas such as propane, with a controlled amount of air before lighting (igniting) it.

The collision theory states that a chemical reaction occurs when the reacting particles of a gas molecule collide with sufficient kinetic energy.

According to the collision theory, the rate of a chemical reaction is directly proportional to the collision between the molecules of its reactant.

For gas-phase chemical reactions, molecules must collide with sufficient kinetic energy to react and form a product in accordance with the collision theory.

In this context, the flame of a Bunsen burner would go out when its gas is turned off because the reacting particles in the gas molecules will no longer collide with one another.

Read more: https://brainly.com/question/8335908

Answer: Mg(OH)2 + 2 HCl → MgCl2 + 2 H2O

Explanation: To balance a chemical equation, we need to ensure that the same number of atoms of each element is present on both sides of the equation.

In this chemical reaction, we have magnesium hydroxide (Mg(OH)2) and hydrochloric acid (HCl) as the reactants, which react to form magnesium chloride (MgCl2) and water (H2O) as the products. To balance this equation, we start by checking the number of atoms for each element on both sides of the equation.

For magnesium (Mg), we have 1 atom on the left and 1 atom on the right.

For hydrogen (H), we have 2 atoms on the left and 2 atoms on the right.

For chlorine (Cl), we have 1 atom on the left and 2 atoms on the right.

For oxygen (O), we have 2 atoms on the left and 2 atoms on the right.

To balance the equation, we can adjust the coefficients in front of each compound until the number of atoms is the same on both sides.

For example, we can start by placing a coefficient of 2 in front of hydrochloric acid to balance the number of chlorine atoms. This gives us:

Mg(OH)2 + 2 HCl → MgCl2 + H2O

Now we can see that we have 2 hydrogen atoms on the left and 2 hydrogen atoms on the right, and 2 chloride atoms on the right as well. However, we have 2 hydroxide (OH) groups on the left and only 1 on the right. To balance this, we can multiply magnesium chloride by 2:

Mg(OH)2 + 2 HCl → 2 MgCl2 + 2 H2O

Now the equation is balanced with the same number of atoms on both sides, so this is our final balanced equation.

Answer:74

Explanation:

Answer:

I believe Tungsten has 2 valence electrons.

Explanation:

Hope this helps!

sodium and chlorine Because Sodium and chlorine make Salt which are ionic compound.

To find the number of molecules in 4.00 moles of glucose (C6H12O6), we need to use Avogadro's number. Avogadro's number is 6.022 x 10^23 molecules per mole. So, to find the number of molecules in 4.00 moles of glucose:

- First, we need to multiply the number of moles by Avogadro's number:

4.00 moles x 6.022 x 10^23 molecules per mole = 2.409 x 10^24 molecules

Therefore, there are approximately 2.409 x 10^24 molecules of glucose (C6H12O6) in 4.00 moles of glucose.

To determine how many molecules are in 4.00 moles of glucose (C₆H₁₂O₆), you can follow these steps:

Step 1: Find the Avogadro's number.
Avogadro's number is the number of atoms, ions, or molecules in one mole of a substance. It is approximately 6.022 x 10²³ particles per mole.

Step 2: Multiply the moles of glucose by Avogadro's number.
To find the total number of molecules in 4.00 moles of glucose, multiply the number of moles by Avogadro's number:

Number of molecules = moles × Avogadro's number
Number of molecules = 4.00 moles × (6.022 x 10²³ particles/mole)

Step 3: Calculate the result.
Number of molecules = 4.00 × 6.022 x 10²³
Number of molecules ≈ 2.4088 x 10²⁴ molecules

So, there are approximately 2.4088 x 10²⁴ molecules in 4.00 moles of glucose (C₆H₁₂O₆).

To know more about glucose visit:

https://brainly.com/question/30548064

#SPJ11

Answer:

37.84 Liters

Explanation:

(see picture)

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

For more such questions on Freezing visit:

https://brainly.com/question/40140

#SPJ8

Answer

A

Explanation

According to the picture given, actoivation energy is the distance from the reactants to the top of the hill.

Chemical indicators are the chemical reagents that show the change in reaction by changing color. Chemical indicators must be chosen with a narrow pH range.

Indicators are the solutions or the substances used for the qualitative and the quantitative measurement by a change in color because of the absence or the presence of the sample concentration.

The chemical indicators cannot detect the exact pH and should be used with a narrow range of pH.

Therefore, option C. the narrow range of pH is the disadvantage of chemical indicators.

Learn more about chemical indicators here:

https://brainly.com/question/15114406

Answer:

C (They must be selected for a narrow ph range.

Explanation:

Edg 2022

Answer:

it is a physical change  

Explanation:

When salt dissolves in water, there is a physical change. A new substance has not been created because the molecules of salt did not bond with the water

Answer:

Chemical here's why.

Explanation:

For example salt dissolving in water is usually considered to be a physical change, however the chemical species in salt solution (hydrated sodium and chlorine ions) are different from the species in solid salt.

If ∆H is negative and the ∆S is positive, then the process is: C. Always spontaneous.

∆H (entalphy change) is the amount of heat absorbed or evolved during a reaction at a constant pressure. Whereas ∆S (entropy change) is the disorder or the change in randomness in the system. Both affect the Gibbs free energy (∆G) which correlates to the spontaneity of a reaction.

The Gibbs free energy is based on this equation:

∆G = ∆H - T∆S

There are three meanings of ∆G values, which:

However, there are 4 conditions for spontaneity regarding the value of ∆H and ∆S. This could be seen in the table given below.

Learn more about Gibbs free energy here https://brainly.com/question/13765848

#SPJ4

Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean.

Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean. When it rains, freshwater from the atmosphere mixes with the saltwater in the ocean, diluting the concentration of salt in the water. This can lead to a decrease in the overall salinity of the ocean.

Evaporation would have the opposite effect, as it removes water from the ocean and leaves behind a higher concentration of dissolved salts. Sea spray and a large volcanic eruption could also potentially impact the salinity of the ocean, but the overall effect would depend on the specific details of the event.

Learn more about Precipitation here :

brainly.com/question/29871773

#SPJ4

Complete Question :

Which of the following would decrease salinity by decreasing the amount of dissolved material in the ocean?

A. evaporation

B. a large volcanic eruption

C. sea spray

D. precipitation

Taking into account the reaction stoichiometry, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.

In first place, the balanced reaction is:

N₂ + 3 H₂ → 2 NH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 6 grams of H₂ form 2 moles of NH₃, 16 grams of H₂ form how many moles of NH₃?

\(moles of NH_{3}= \frac{16 grams of H_{2} x2moles of NH_{3}}{6 grams of H_{2}}\)

moles of NH₃= 5.33 moles

Then, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

#SPJ1

Answer:

8

Explanation:

i dunno i think its right tho

Answer:

The telescope

Explanation: