PLEASE HELP FAST WILL MARK BRAINLIEST
Which element(s) is/are not balanced in this equation?

Pb(NO3)2 + 2KCl -> PbCl2 + KNO3

A.) K
B.) K, N, and O
C.) N amd O
D.) Pb, N, and O
(Even though you don't need the Periodic Table to figure this out, feel free to use it if you think it will help you)

When an electron falls to a lower energy level, a photon is emitted representing the energy difference between the higher and the lower state. This process is a fundamental aspect in atomic physics and basis of many light effects.

When an electron falls to a lower energy level, energy is released. This energy transition is represented as an emitted photon, a packet of electromagnetic energy. Based on Bohr's model, a hydrogen atom is most stable in its ground state, when an electron is in its lowest energy orbit. An atom can absorb energy, causing an electron to shift to a higher energy level, or an excited state. However, an atom usually exists in the excited state for a brief period before the electron naturally transitions back to a lower energy level, or ground state. During this decline, a photon of specific wavelength is emitted, accounting for the energy difference between initial and final energy levels.

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Answer:

ok so the answer is 6×12÷24= THE Answer if u were look for this

Explanation:

SO IN KHAN I DID IT AND I GOT IT RIGHT

THX PERSON

The hydrocarbon with the empirical formula C3H8 is Propane, a saturated hydrocarbon that belongs to the alkane family.

The hydrocarbon with an empirical formula of C3H8 is Propane. The empirical formula provides the simplest, reduced ratio of elements within a compound. In the case of C3H8, this represents 3 carbon atoms to 8 hydrogen atoms, which is the formula for propane. Propane is a member of the alkane family of hydrocarbons, which are characterized by single bonds between the carbon and hydrogen atoms, therefore classified as saturated hydrocarbons.

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The air is warmer than the pool water because water has a high specific heat, requiring more energy to increase its temperature than air does. Option B is correct.

Specific heat is the amount of energy required to raise the temperature of a substance. Water has a high specific heat, which means it takes more energy to increase its temperature compared to air. This property allows water to absorb a lot of heat without a significant rise in temperature, hence it often feels cooler than the air on a sunny day.

Furthermore, it's also worth noting that this high specific heat of water plays a crucial role in Earth's climate and helps to moderate temperatures.

Hence, B. is the correct option.

The complete question is:

Why is the air warmer than the water in a pool on a hot sunny morning?  

A) due to surface tension  

B) because of water’s specific heat    

C) because of capillary action    

D) due to water’s solvent properties

Final answer:

Newton's three laws of motion are fundamental principles in classical mechanics, explaining how objects behave under various forces. The first law, or law of inertia, says objects maintain their state of motion unless acted upon by an external force. The second law relates force, mass, and acceleration, while the third law states that every action has an equal and opposite reaction.

Explanation:

Isaac Newton's three fundamental laws of motion form the basis for classical mechanics, describing the relationship between a body and the forces acting upon it. The laws are integral to our understanding of interactions and forces in physics.

Newton's first law, also known as the law of inertia, asserts that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by an external force. Newton's second law advances this concept by stating that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. Lastly, Newton's third law establishes that for every action, there is an equal and opposite reaction, meaning that forces between two interacting objects are equal in magnitude and opposite in direction.

Answer:

$24000

Explanation:

We are given that

Sales tax=8%

Sales tax amount=$1920

We have to find the cost of the Buick before the tax.

Let x be the cost of Buick before the tax.

According to question

8% of x=1920

[tex]\frac{8}{100}\times x=1920[/tex]

[tex]x=\frac{1920}\times \frac{100}{8}[/tex]

[tex]x=24000[/tex]

Hence, the cost of the Buick before the tax=$24000

yes because you have 2 H 2Na 2O on both sides

Answer : Yes, the given chemical reaction is balanced equation.

Explanation :

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

The given chemical reaction is,

[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]

In this reaction, there are 2 atoms of sodium, 4 atoms of hydrogen and 2 atoms of oxygen are present on both side of the reaction. So,

This chemical reaction is a balanced reaction because in this reaction, the number of atoms of sodium, hydrogen and oxygen are balanced on the side of the reaction.

Hence, yes the given chemical reaction is balanced equation.

Answer : The sodium and chlorine are the products.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on the reactant side must be equal to the product side.

The given balanced chemical reaction is,

[tex]2NaCl\rightarrow 2Na+Cl_2[/tex]

In the balanced chemical reaction, the species present on the left side of the reaction is known as reactant and the species present on the right side of the reaction is known as product.

From this we conclude that, the sodium, [tex]Na[/tex] and chlorine, [tex]Cl_2[/tex] are the products and sodium chloride, [tex]NaCl[/tex] is the reactant.

Hence, the sodium and chlorine are the products.

The amount of oxygen in 585 g of Li2O is calculated using the molar mass of Li2O and the proportion of oxygen's molar mass to Li2O's molar mass, then multiplied by the total mass of Li2O.

To determine how many grams of oxygen are in 585 grams of Li2O, we use the molar mass of Li2O and the molar mass of oxygen. The molar mass of Li2O (lithium oxide) is the sum of the mass of two lithium atoms and one oxygen atom. One mole of Li2O weighs approximately 29.88 g/mol (2 x 6.94 + 16.00), and one mole of oxygen weighs 16.00 g/mol.

To find the mass of oxygen in Li2O:

Therefore, to calculate the exact grams of oxygen in 585 g of Li2O, you use the proportion of oxygen's molar mass to Li2O's molar mass, which is 16.00/29.88. Multiply this by the given mass of Li2O to find the mass of just the oxygen part:

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To determine the grams of oxygen in 585 g of Li₂O, first calculate the molar mass of Li₂O, find the number of moles in 585 g, and then convert the moles of oxygen to grams. The final result is 335.84 grams of oxygen.

To find the number of grams of oxygen in 585 g of Li₂O, we need to follow these steps:

Therefore, there are 335.84 grams of oxygen in 585 grams of Li₂O.

Part 1 : Answer is only B substance is soluble in water.

In this experiment undissolved mass of each substance was measured. According to the given data, undissolved mass of substance B at 20 °C is 10 g while A is 50 g. Since, the initial added mass of each substance is 50 g, we can see that substance A is not soluble in water since the undissolved mass is 50 g.

Part 2 : Substance A is not soluble in water and substance B is soluble in water.

According to the given data, the undissolved mass of substance A remains as same as initial added mass, 50 g throughout the temperature range from 20 ° to 80 °C. Hence, we can conclude that substance A is not soluble in water.

But, according to the data, undissolved mass of substance B at 20 °C is 10 g. That means, 40 g of substance B was dissolved in water. When the temperature increases the undissolved mass of substance B decreases. Hence, we can conclude that substance B is soluble in water and solubility increases with temperature.

Answer:

Bitter Taste

Explanation:

Acids have a sour taste and Bases have a Bitter taste. Acids turn litmus paper red because their pH level is less than 7. They are corrosive and can break down materials. They can also dissolve metals. Hope this helped ú⩊ù

The right is Separation by density .

Take the blood which is a good example of a heterogeneous mixture.

Blood is a vital liquid in our body, which transports oxygen from the air to our lungs so we can breathe. It is also used to eject wastes, such as carbon dioxide, to bring cells and molecules of the immune system to the tissues, and to spread hormones throughout the body. It corresponds to plasma, red blood cells, white blood cells, platelets and hemoglobins combined.

In medical tests centrifugal force is used to separate the different components of the blood.

In general, the centrifugation will allow to separate and analyze the different components of the blood, to know if the rate of white blood cells in the blood of a patient, for example, is normal, and therefore to know if his system Immune is integrity.

Under the action of centrifugal force, the solid components in the blood are drawn to the bottom of the tube in which the blood is contained. The centrifugal force then acts as an accelerated settling. It separates plasma from red blood cells and white blood cells.

Answer:

The answer is seperation by density! Hope this helped

Explanation: