help on this too please!!

Answer:   Ionic Bonds

"When it forms the nitride ion, it gains three electrons to form a 3- ion: N3− . In ionic compounds, the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N"

Explanation:

https://socratic.org/questions/what-is-the-formula-for-sodium-nitride#:~:text=When%20it%20forms%20the%20nitride,nitride%20is%20Na3N%20.

Answer:

C

Explanation:

KCl - the flame test for Potassium produces a lilac flame

The metal in the salt has been potassium, and the salt has been KCl. Thus, option C is correct.

The flame test has been performed with the burning of the salt under the flame. The electrons of the elements after gaining the energy have been excited to the higher energy level.

There has been the returning of the electrons to the ground state. In the process. the absorbed energy has been released in the form of visible radiations. The determination of the radiations results in the determination of the metal, as each metal has a unique flame.

The burning of the salt results in the lilac flame. The flame has resembled the burning of potassium. Thus, the metal in the salt has been potassium, and the salt has been KCl. Thus, option C is correct.

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Answer:

It's spiral for any of my study island people.

Explanation:

the answer is deceleration.

Answer:

26.0 moles

Explanation:

Given the formula;

PV =nRT

P= pressure of the gas

V = volume of the gas

n = number of moles of the gas

R = gas constant

T = temperature

n = PV/RT

n = 125 * 5/0.082 * (20 + 273)

n = 625/24.026

n = 26.0 moles

Answer:

7.30g O₂ are in excess and 21.3g of SO₂ should be produced.

Explanation:

The reaction of Zinc sulfide (ZnS) with oxygen (O₂) produce ZnO and SO₂ as follows:

2ZnS + 3O₂ → 2ZnO + 2SO₂

Using this reaction we can find the amount of SO₂ produced converting the ZnS and O₂ to moles and finding limiting and excess reactant as follows:

Moles ZnS -Molar mass: 97.47g/mol-:

32.5g * (1mol / 97.47g) = 0.333 moles ZnS

Moles O₂ -Molar mass: 32g/mol-:

23.3g O₂ * (1mol / 32g) = 0.728 moles O₂

For a complete reaction of the 0.333 moles of ZnS are required:

0.333 moles ZnS * (3mol O₂ / 2mol ZnS) = 0.500 moles O₂.

As there are 0.728 moles of O₂, limiting reactant is ZnS and excess reactant is O₂.

The moles and mass of O₂ in excess are:

0.728mol - 0.500mol = 0.228moles O₂ * (32g / mol) = 7.30g O₂ are in excess

The produced mass of SO₂ -Obtained from the moles of ZnS- is:

0.333 moles of ZnS * (2mol SO₂ / 2mol ZnS) = 0.333 moles SO₂

0.333 moles SO₂ * (64.066g / mol) =

Answer:

Physical change

Explanation:

The molecules are being rearranged as the water changes phases from liquid to gas, but this doesn't change the chemical structure of the water.

Answer:

The atomic number is the number of the elements inside the periodic table and the mass is the weight or a number under the elements.

Explanation:

Correct me if I am wrong

Answer:

Atomic number

The number of protons in the nucleus of an atom.

Atomic Mass

The mass of an atom of a chemical element expressed in atomic mass units.

Answer:

You can simply use process of elimination to find your answer. The only option that results in SOUND energy is C. Therefor your answer would be C.

Explanation:

<3

The rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.

Crickets have been the nocturnal animals that sleep in the daytime and were awake at the night. The crickets have been consisted of the front limbs and hind limbs with a pair of wings that support them to fly.

The crickets make the sound by the rubbing of the legs, thereby creating the vibrational sounds that have been sound energy.

The rubbing of legs has been utilized as the mechanical energy or the energy of doing work. The mechanical energy has been converted to the vibrational energy that contributes to the energy of the sound waves, thereby the sound energy.

Thus, the rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.

For more information about the energy transformation, refer to the link:

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Answer:

Explanation:

Cuz the color is a light yellow and water to make it loose color

The mixing of two different liquids together to form a new mixture is called a solution.

The correct option is acid.

In a solution, there are two components which are known as solute and solvent. In which solute is less in amount and solvent is more in an amount which is water.

According to the question, the smoothie turns the color to pink from purple because lemon act as an acid and changes the ph of the solution.

Hence, the Lemon act as an acid.

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brainy ki maa ki chut bhag bakwas aap

Answer:

Strontium chloride

Explanation:

get that W

Answer:

Strontium chloride or strontium nitrate

Explanation:

Answer: The temperature would increase assuming it is 30 degree water causing a change in the temperature and assuming it is a seismic groundwater source you are using the earths core to heat the school so it would likely be a stable energy source. There are very few places on the planet where that warm of water is accessible without drilling really deep into the core but if it is there and is a stable fault then the energy would be consistent and stable.

The groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

Groundwater heating system:

Although the temperature of the ground water is not much but the amount of groundwater is too much.

This large amount water slowly releases heat energy which is transferred in the ambient atmosphere of school.

Therefore, the groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

To know more about groundwater heating system,

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Answer:

Actinides

Explanation:

They are defined as "any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence"

Answer:

Actinides

Explanation:

Actinides are radioactive and human-made elements.

Answer:

1.0 V

Explanation:

Step 1: Given data

Step 2: Convert "I" to Ampere

We will use the conversion factor 1 A = 1000 mA.

100 mA × 1 A/1000 mA = 0.100 A

Step 3: Calculate the potential difference

We will use Ohm's law.

V = I × R

V = 0.100 A × 10 Ω = 1.0 V

Answer:Sexual reproduction produces offspring with novel combinations of genes

Explanation:

yes

Answer: The reaction is endothermic.

Explanation:

Endothermic reaction : It is a type of chemical reaction where the energy is absorbed from the surrounding. In the endothermic reaction, the reactant have less energy than the energy of products

In endothermic reaction, enthalpy terms is located on the reactant side.

Example: [tex]A+B+energy\rightarrow C+D[/tex]

Exothermic reaction : It is a type of chemical reaction where the energy is released into the surrounding. In the exothermic reaction, the energy of reactants are more than the energy of products

In exothermic reaction, enthalpy terms is located on the product side.

Example: [tex]A+B\rightarrow C+D+energy[/tex]

Answer:

1.33 x 10^-3 mol H2

Explanation:

? mol H2 = 8.00 x 1020^20 molecules H2 x  1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2

Hope that helps!

8.00 x 10²⁰ molecules of H₂ present in 1.33 x 10⁻³ mole of H₂.

Mole is used to define the amount of quantity of any substance and 1 mole equals to the 6.023 × 10²³ elementary entities or atoms in it.

According to the question:

1 mole of H₂ = 6.023 × 10²³ molecules of H₂

or 1 molecules of H₂ = 1 mole of H₂ / 6.023 × 10²³ molecules of H₂

To convert 8.00 x 10²⁰ molecules into mole we calculate as follow:

x mole of H₂ = (8.00 x 10²⁰ molecules x  1 mole of H₂) / 6.023 × 10²³ molecules

x mole = 1.33 x 10⁻³ mole

Hence, 1.33 x 10⁻³ mole of H₂ consist 8.00 x 10²⁰ molecules.

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Answer:

It means Sulfurous Acid

Explanation:

Answer:

a.0.837 moles of silver phosphate

b. 14.55

c. 2.61

Explanation: it is all about the molar ratio so the numbers of front of the molecular formulas there is a 3 in front of the silver nitrate and the other 2 we are asked abuoit have no number so that is a 1 so you are multiplying or dividing by that ratio whichever way you go

Answer:

D 25°c is the highest rate of photosynthesis.

Answer:

Unbalanced forces are forces whose net amount is not zero.

This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.

Unbalanced forces make some change in the position of the object on which force is exerted.

Answer:

This can take place when two equal forces are acting in the same direction or opposite direction but with different forces.

Unbalanced forces make some change in the position of the object on which force is exerted.

Answer:

I believe it would be 2

Explanation:

if there are 2 nitrogen molecules then there would have to be 2 hydrogen molecules but this could be completely wrong

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Answer:

Anwer is A  0.60

Explanation:

Answer:2

Explanation: