What is the atomic mass of potassium,sodium and neon?

Answer:

386.14 K ( 113.14 ºC)

Explanation:

Initial Volume V1 = 28 L

Initial Temperature T1 = 45 + 273 = 318 K

Final Temperature T2 = ?

Final Volume V2 = 34 L

The relationship between these quantities is given by the charles law equation;

V1 / T1 = V2/ T2

T2 = V2 * T1 / V1

Inserting the values

T2 = 34 * 318 / 28

T2 = 386.14 K

Answer:

I dont know at all and that is confusing.

Answer:

Volume

Explanation:

Cubic centimeters are used to measure the space an object takes up, or its volume.

Answer:

Volume

Explanation:

Answer:

CuNO3

Explanation:

In order to calculate the empirical formula in this question;

Cu = 50.61% = 50.61g

N = 11.16% = 11.16g

O = 38.23% = 38.23g

Next, we convert each gram unit to moles by dividing by their respective molar mass (Where; Cu = 63.55, N = 14, O = 16)

Cu = 50.61 ÷ 63.55 = 0.796mol

N = 11.16 ÷ 14 = 0.797mol

O = 38.23 ÷ 16 = 2.389mol

Next, we divide each mole value by the smallest (0.796)

Cu = 0.796mol ÷ 0.796 = 1

N = 0.797mol ÷ 0.796 = 1.001

O = 2.389mol ÷ 0.796 = 3.001

Approximately, the simple whole number ratio between Cu, N and O is 1:1:3, hence, the empirical formula is CuNO3.

Answer:

3.2

Explanation:

i caculated give me a 1 star if incorrect

Answer:

A

Explanation:

From right to left, the atomic radius increases, electronegativity decreases, and ionization energy decreases.

(1) the atomic radius increases;

(2) the electronegativity decreases ; and

(3) the ionization energy decreases.

A. increases, decreases, decreases

On the periodic table, atomic radius generally decreases as you move from left to right across a period (due to increasing nuclear charge) and increases as you move down a group (due to the increasing number of electron shells). Electronegativity increases across a period and decreases down a group. Ionization energy to increase moving from left to right across an element period.

Thus, the correct option is A.

Find more information about Atomic radius here:

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Answer:

A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products.

Answer:

What is the total number of valence electrons in the Lewis structure of nh4+?

Total valence electrons pairs

Total electron pairs are determined by dividing the number total valence electrons by two. For, NH4+, Total pairs of electrons are 4.

Explanation:

Hope it helps! Correct me if I am wrong :>

Im sure about my answer :>

Can you please mark me as brainlest?

Answer: c

Explanation: pretty sure its c :]

Answer:

A

Explanation:

Answer:

single replacement

Explanation:

Answer:

The gravitational force between the two objects would increase.

Answer:

The gravitational force between the two objects would increase.

Explanation:

Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

Answer:

2nd or 3rd dyfudhfkfhxhxhxjxjcjcifid

The balanced equation of the given reaction include the term 2Fe (OH)₃. Because, the Fe and OH- have to be balanced in both side. Hence, option d is correct.

The balanced chemical equation of a reaction represents the prefect stoichiometry of all the reactants and products. The number of each element in the reactant side much must be equal to their number in the product side.

Therefore, no atoms can be lost or produced extra in a reaction. Thus, the total mass become conserved for the system. The complete balanced reaction between iron sulphate and barium hydroxide is given below:

[tex]\rm Fe_{2}SO_{4} + 3Ba(OH)_{2} \rightarrow 3BaSO_{4} + 2Fe (OH)_{3}[/tex]

Therefore, the balanced equation of the reaction include the term 2 Fe(OH)₃. Thus, option d is correct.

Find more on balanced reactions:

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Answer:pu-239

Explanation:

Pu-239 is regarded as the radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time

Disposal of radioactive nuclear waste is often regarded as a problem.

The waste sources are:

Disposal of bomb-grade plutonium is often difficult.

The longer lived isotopes are:

The storage of the longer lived elements is through containment for the next several thousand of years.

The control or management of radioactive waste is a hard, multifaceted procedure.

Learn more from

https://brainly.com/question/10125168

Answer:

opg

Explanation:

A series of chemical reactions transform Volatile Organic Compounds (VOCs) into substances that combine with nitrogen dioxide to produce PAN (Peroxyacytyl nitrate), yet another element in smog. Nitrogen dioxide in the air also reacts with water vapor to form nitric acid, one of the types of acid in acid rain.

Answer:

1. Molecular weight = 333.3 g/mol

2. Strenght = 2222.2 mg/L

Explanation:

First, we need to find molarity (M) from normality (N) as follows:

[tex] N = nM [/tex]      

Where n is the number of OH⁻ = 2

[tex] M = \frac{N}{2} = \frac{0.03}{2} = 0.015 mol/L [/tex]

Now, when the H₃X solution is neutralized with Ca(OH)₂ we have:

[tex]\eta_{H_{3}X} = \eta_{Ca(OH)_{2}} = M_{Ca(OH)_{2}}*V_{Ca(OH)_{2}} = 0.015*0.04 = 6 \cdot 10^{-4} moles[/tex]              

Hence, the molecular weight (MW) of H₃X is:    

[tex] MW = \frac{m_{H_{3}X}}{\eta_{H_{3}X}} = \frac{0.2 g}{6 \cdot 10^{-4} moles} = 333.3 g/mol [/tex]

Finally, we can calculate the strength (S) of this solution in ppm as follows:

[tex] S = \frac{m}{V} = \frac{200 mg}{0.050 L + 0.040 L} = 2222.2 mg/L [/tex]

I hope it helps you!

Answer:

The answer is "5 moles".

Explanation:

Please find the complete question in the attached file.

[tex]\to 3.01 \times (10^{22}) = 0.0499822251 \approx 0.05 \ moles[/tex]

Answer:

CaCO₃ ------> CaO + CO₂

Note: The breakdown products of solid calcium carbonate is not carbon dioxide gas, oxygen gas, and solid calcium. Rather, it is calcium oxide and carbon dioxide as shown in the reaction equation above.

Explanation:

Calcium carbonate is a mineral which occurs in nature in rocks as calcite and limestone. It is also the main component of eggshells, snail shells, seashells and pearls. It has the molecular formula CaCO₃.

Calcium carbonate or limestone decomposes into calcium oxide and carbon dioxide when heated and the reaction is used to make quicklime and carbon dioxide gas. The equation of the reaction is given below:

CaCO₃ ------> CaO + CO₂

Calcium oxide, one of the products of The decomposition reaction is known as lime and is an important mineral used for many purposes such as reducing the acidity of soils, in the production of limelight, as well as serving as the main ingredient in cement.

The main use of calcium carbonate is in the construction industry as an ingredient of cement. Calcium carbonate is also an important mineral required by sea organisms for making their shells.

Answer:

C3H6O3

Explanation:

Hydroxyacetone

Answer: energy is never moves

Explanation:

Answer:

i dont know either im sorry

Explanation:

Answer:

Where are the graphs?

Explanation:

Answer:

All three populations would increase.

Explanation:

Answer:

C

Explanation: