Help! Please and thank you

Answer:  The bonds that are made and broken in a reaction release energy when forming products that contain less total energy than the reactants.

Explanation:  Elements form bonds with each other when the total energy of the resulting products is less than the starting energy.  The term "energy" refers to the energy of the electrons that are being held in an atom by the nucleus.  Keeping the positively charged nucleus happy means that the electrons are trying to get closer, but they repel each other as they get closer to the nucleus.  This results in orbits, preferred areas around the nucleus where the electrons spend their day in a delicate balance with the nucleus and other electrons.  These orbits offer housing for the electrons that involve discreet energies for the electrons.  When elements react, the resulting bonding pattern often results in an overall reduction in total energy.  The energy reduction results in heat, light, and/or sound.  The release is termed "exothermic."

Answer:

5:2

//answer was too short //

Answer:

The ratio by mass for calcium and oxygen in a calcium oxide is given by 5:2

hope it helps

Answer:

1162m/s is the faster speed

Explanation:

The speed is a physical property defined as the distance travelled of an object in determined amount of time.

A speed of 316m/s means the object is travelling 316 meters per second transcurred.

In the same way, the speed of 1162m/s means the object is travelling 1162m per second.

As the second object is travelling more distance per second than the first,

Answer:

H2SO4 sulfuric acid 2.75

Explanation:

I hope it will help you

Answer:

welcome

Explanation:

Uses of Rutherfordium

Because rutherfordium is made within the lab, there are not very many uses for this element commercially. On the other hand, rutherfordium has been used within the laboratory setting to conduct research. Most elements that are highly radioactive are used for nuclear power and medicinal purposes.

Answer:

Solution given:

2 Al + 3 H2SO4 – Al2(SO4)3 + 3H2

2mole +3mole. --- 1 mole + 3 mole

27×2g. +3×98g-------- 342,g. + 6g

we have

2 mole of Al gives. 6g of h2

5 moles of Al gives 6/2×5=15g of hydrogen

15 g is your answer

Answer:

Nuclide, , also called nuclear species, species of atom as characterized by the number of protons, the number of neutrons, and the energy state of the nucleus. ... The term nuclide is not synonymous with isotope, which is any member of a set of nuclides having the same atomic number but differing mass number.

Explanation:

Answer:

a distance isotope of an atom

Explanation:

Answer:

A.5

Explanation:

Answer:

For the reaction to be spontaneous at high temperatures, ΔG < 0 and, ΔH > 0 and ΔS > 0.

Explanation:

According to the Gibbs free energy equation, for the reaction to be spontaneous at high temperatures when it was not spontaneous at low temperatures, the free energy change ΔG < 0.

Since ΔG = ΔH - TΔS where ΔH = enthalpy change and ΔS = entropy change,

For ΔG < 0 at high temperatures, ΔH > 0 and ΔS > 0. That is both ΔH and ΔS are positive at high temperatures.

So, for the reaction to be spontaneous at high temperatures, ΔG < 0, and ΔH > 0 and ΔS > 0.

When ΔH and ΔS are both positive

Answer:

a. 250 atm

Explanation:

IT MIGHT BE WRONG PLS DOUBLE CHECK

Answer:

dbdbdbdjdbdjdb zbdjdjdjdirfjfjrjdudhdhdhd

Answer:

Yeah, it allowed according to the basics of chemistry.

Answer:

C

Explanation:

cause i'm smart

Answer:

D

Explanation:

Because it says tree roots breaking rocks into smaller rocks.

Hope this helped!

Answer:

35.8 g

Explanation:

Step 1: Given data

Mass of water: 63.5 g

Step 2: Calculate how many grams of KCl can be dissolved in 63.5. g of water at 80 °C

Solubility is the maximum amount of solute that can be dissolved in 100 g of solute at a specified temperature. The solubility of KCl at 80 °C is 56.3 g%g, that is, we can dissolve up to 56.3 g of KCl in 100 g of water.

63.5 g Water × 56.3 g KCl/100 g Water = 35.8 g KCl

Answer:

Solid

Explanation:

The reason is because the liquid aspirin has a plastic cover with a liquid inside and it doesn't take long for out stomach acid to dissolve the cover unlike the Solid aspirin where is slowly dissolves.

Answer:

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions.

Plz mark me brainliest.

Respuesta:

1.50 moles

Explicación:

Paso 1: Escribir la ecuación química ajustada para la descomposición del carbonato de calcio

CaCO₃ ⇒ CaO + CO₂

Paso 2: Calcular los moles correspondientes a 150 g de CaCO₃

La masa molar de CaCO₃ es 100.09 g/mol.

150 g × 1 mol/100.09 g = 1.50 mol

Paso 3: Calcular los moles de CO₂ producidos a partir de 1.50 moles de CaCO₃

La relación molar de CaCO₃ a CO₂ es 1:1.

1.50 mol CaCO₃ × 1 mol CO₂/1 mol CaCO₃ = 1.50 mol CO₂

Answer:

4.5 × 1015 J

Explanation:

Energy was released through this form of mass.

The energy released if a sample loses 0.05 kg mass through

radioactive decay is  45 ×10¹⁴ J.

The ability to do work is called energy.

The Einstein's formula can be used to find the energy released. Energy is the product of mass  and  the velocity of light in a vacuum squared.

Given that the mass is 0.05 kg and speed of light in vacuum is 3×10⁸ m/s.

E = 0.05 × (3×10⁸)²

E = 45 ×10¹⁴ J

The energy is released if a sample loses 0.05 kg mass through

radioactive decay is 45 ×10¹⁴ J.

Learn more about Energy.

https://brainly.com/question/17858145

#SPJ2

Todo en un estado sólido de materia tiene una forma y una longitud distintas. El volumen de un objeto es la cantidad de espacio que ocupa. Un sólido es un bloque de madera que conserva su forma y volumen cuando se coloca sobre una mesa.

Hope that helps!!!

¡Espero que ayude!

Answer:

Pull

Explanation:

The higher the effective nuclear charge, the more the nucleus will be gaining protons. This process makes the electrons to be drawn closer to the positive charge of the nucleus.

Thus, it leads to a greater pull exerted by the nucleus on the added electrons.

Answer:

D). The kinetic energy of the water particles decreases.

Explanation:

Your welcome!

ANSWER

D

Explanation: Got it correct on edge 2022

Answer:

4121 years

Explanation:

From;

0.693/t1/2 = 2.303/t log No/N

t1/2= half life of the carbon-14

No= count rate of the living tissue

N= count rate of the sample

t = age of the sample

0.693/5730 =2.303/t log (13.5/8.2)

1.21 * 10^-4 = 2.303/t * 0.2165

1.21 * 10^-4 = 0.4986/t

t = 0.4986/1.21 * 10^-4

t = 4121 years

Answer:

67.3 kPa

Explanation:

We're focusing on pressure and volume of gases, so we can use our ideal gas law formula PV=nRT. Everything is constant except pressure and volume, but the values change when moving from city 1 to city 2, so we can say PV city 1= PV city 2.

We can simplify our formula to be P1V1=P2V2. This is specifically Boyle's Law, where if pressure increases (from city 1 to city 2) then volume decreases, thus we can say pressure and volume have an inverse/opposite relationship.

This is an important formula to understand, you can easily memorize it by referring to PV=nRT.

Let's plug in the values we know.

P1V1=P2V2

(101)(6) = (9)(V2)

Now let's solve for V2.

[tex]\frac{101 x 6}{9}[/tex]  = V2

[tex]\frac{606}{9}[/tex] = V2

67.3 kPa = V2

bud but i think

is in it forsure

Answer:

Have Nice Day

Explanation:

2NaCI is the answer

now that i do and I also believe adopt don't shop and also no puppy mill.