chlorine and bromine are in the same group in the periodic table. how many valcence elctrons o thy have? are they emtals or non metals?

Answer:

2NaCl + 2H2O --> Cl2 + 2NaOH + H2

Explanation:

Answer:

Well we know that matter is neither created nor destroyed by chemical reactions or physical transformations. It is not destroyed it simply was converted to gas. =D

The scientific law that is of importance here is the 'Law of conservation of mass'.

So, from this, we can conclude that the scientific law that is of importance here is the 'Law of conservation of mass'.

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Answer:

Nucleus is the answer of your question

Answer:

nucleus is your awnser

Answer: Click the puzzle pdf I did some of the words but if you need more let me know because I will go back in and do more!

Explanation:

Gas must be increased to 706 L.

STP the pressure is 1atm and the temperature is 273K.

Therefore,

P1 V1 = P2 V2

V2= (P1V1T2)/T1P2

V2 = (3×250×273)/(290×1)

V2 = 706 L

The 3 main factors that affect barometric (air) pressure are:

The pressure and volume of a gas are inversely proportional. Therefore as you increase the pressure on a gas the volume decreases. This means that as the pressure on a gas increases the gas has less space to spread out and the particles are closer together.

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A constant current of 0.729 a is passed through an electrolytic cell containing molten mncl4 for 21.0 approximately 15.71 g of Mn(s) is produced during this electrolysis process.

To find the mass of Mn(s) produced, we can use Faraday's law of electrolysis. First, we need to determine the amount of charge passed through the cell:
Charge (Q) = Current (I) × Time (t) = 0.729 A × 21.0 h × 3600 s/h = 55188 C
Next, we'll find the moles of electrons involved using Faraday's constant (F = 96485 C/mol):
Moles of electrons = Charge (Q) / Faraday's constant (F) = 55188 C / 96485 C/mol ≈ 0.5716 mol
In MnCl₄, the manganese ion (Mn²⁺) has a charge of +2. Therefore, 1 mol of Mn requires 2 mol of electrons:
Moles of Mn = Moles of electrons / 2 = 0.5716 mol / 2 ≈ 0.2858 mol
Finally, we'll find the mass of Mn(s) produced using the molar mass of manganese (54.94 g/mol):
Mass of Mn = Moles of Mn × Molar mass of Mn = 0.2858 mol × 54.94 g/mol ≈ 15.71 g

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Answer:

I would say C.)

Explanation:

Freezing and condensation are both ways that heat is let out from an object.

Answer: Molarity of the solution is 0.028 M.

Explanation:

Given : Moles of sucrose (solute) = 0.112 mol

Volume of solution = 4.0 L

Molarity is the number of moles of solute dissolved in a liter of solvent.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.112 mol}{4.0 L}\\= 0.028 M\)

Thus, we can conclude that molarity of the solution is 0.028 M.

Answer:

Atoms of reactants rearrange to form new substances

Explanation:

During a chemical reaction, atoms  of reactants rearrange to form new substances.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

The answer is 101.1032

Explanation:

Answer: suspension

Explanation:

Baby oil is primarily composed of mineral oil, which is a mixture of hydrocarbons. The Lewis structure of hydrocarbons consists of carbon and hydrogen atoms connected by single, double, or triple bonds.

Baby oil is not a single compound but a mixture of hydrocarbons, which are organic compounds composed of carbon and hydrogen atoms. These hydrocarbons are obtained from the distillation of petroleum or mineral oil. The Lewis structure represents the arrangement of atoms and their bonds in a molecule.

For hydrocarbons, carbon atoms usually form four bonds, while hydrogen atoms form one bond. The bonds between carbon and hydrogen atoms can be single, double, or triple, depending on the specific hydrocarbon. In the case of mineral oil, the hydrocarbons are predominantly alkanes, which have single bonds between the carbon and hydrogen atoms.

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Answer and Explanation:

Given that

Length of race = 5km

Maximum speed = 45 yards

Based on the above information,

We transform the yards to kilometer i.e.

1 km = 1093.613 yards

And,  

x = 45 yards

So,

1093.613 × x = 45

x = 45 ÷ 1093.613

x = 0.0411480 km

Where

x = Maximum length for which the maximum speed demonstrated in kilometers is sustained.

So, we concluded that Lamor cannot go for the overall 5km as he maintained till 0.0411 km

Answer:

174.259 g/mol

Explanation:

The molecular weight of potassium (K2so4) is 174.259 g/mol .

Hope it is helpful to you

According to this ratio of effusion rates, the gas with the lower molar mass or density has a higher rate of effusion. The rate is 1.07 after being adjusted for the necessary significant figures. N2 is 1.07 times as fast as O2 according to this.

Rate of effusion of gas A /Rate of effusion of gas B = √Molar Mass of gas B/√Molar Mass of gas A  = √density of gas B /√density of gas A

Alternatively, the equation would be:

The rate of N2 effusion is 32.0 g/mol.

Rate of O2 effusion is 28.0 g/mol.

This amounts to:

Rate of N2 effusion is 1.069044968.

Oxygen effusion rate

After making the necessary significant figure adjustments, we determine that the rate is 1.07. This indicates that the speed of N2 is 1.07 times that of O2. Although barely, it is faster.

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Answer:

The three states of matter are the three distinct physical forms that matter can take in most environments: solid, liquid, and gas. In extreme environments, other states may be present, such as plasma, Bose-Einstein condensates, and neutron stars.

Explanation:

A yellow-gold sphere has a mass of 15.2 g when passes in the orange liquid with volume 43 mL

Density= mass/volume

Density = 15.2 g/ 43mL

Density = 0.35 g/mL

Question is to find density

The average atomic mass of the element is 116.70 u. To calculate the average atomic mass of an element with two naturally-occurring isotopes with mass numbers 115.00 u and 117.00 u, and natural abundances of 15% and 85%, respectively, follow these steps:

1. Convert the natural abundances into decimals: 15% = 0.15 and 85% = 0.85.

2. Multiply the mass number of each isotope by its corresponding abundance: (115.00 u × 0.15) and (117.00 u × 0.85).

3. Add the products from step 2 together: (115.00 u × 0.15) + (117.00 u × 0.85).

4. Round the result to 2 decimal places.

Calculating the values: (115.00 u × 0.15) = 17.25 u; (117.00 u × 0.85) = 99.45 u; 17.25 u + 99.45 u = 116.70 u. The average atomic mass of the element is 116.70 u.

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An Arrhenius base is a molecule that when dissolved in water will break down to yield an \(OH^-\)or hydroxide ion in solution.

An Arrhenius base is a compound that increases the \(OH^-\) ion concentration in aqueous solution.

An Arrhenius base is a substance that, when dissolved in an aqueous solution, increases the concentration of hydroxide, or , \(OH^-\) ions in the solution.

Bases Properties

Arrhenius bases that are soluble in water can conduct electricity.

Bases often have a bitter taste and are found in foods less frequently than acids. Many bases, like soaps, are slippery to the touch.

Bases also change the colour of indicators. Red litmus turns blue in the presence of a base (see figure below), while phenolphthalein turns pink.

Some bases react with metals to produce hydrogen gas.

Acids (pH < 7.0) react with bases (pH > 7.0) to produce a salt and water. When equal moles of an acid and a base are combined, the acid is neutralized by the base. The resulting mixture will have a more neutral pH.

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of \(H^+\) ions in the water. In contrast, an Arrhenius base dissociates in water to form hydroxide ions \(OH^-\).

Example, sodium hydroxide, is added to an aqueous solution. NaOH dissociates into sodium, \(Na^+\), and hydroxide, \(OH^-\) ions.

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Answer: 57.C

Explanation: simple subtraction

Answer:

The grater the difference in electronegativity, the more ionic the bond

Answer:

I don't know

Explanation:

I'm sorry I didn't learn this in my life,I have never reach in this level

Answer: B Is the answer

Explanation:  I just did this

Answer:

thank you so much i really needed that

Explanation:

Answer:

What do the key results indicate?

Key Results are the measures and milestones that indicate how you know you will accomplish our Objective.

If you constructed graphs, what trends do they indicate in your data?

A linear pattern is a continuous decrease or increase in numbers over time. On a graph, this data appears as a straight line angled diagonally up or down (the angle may be steep or shallow). So the trend either can be upward or downward.

Were there any problems with the experiment or the methods? Did you have any surprising results?

Yes, i was surprised and learn so much and it was no problem.

Section IV: Conclusions

What do the results tell you about your hypothesis(es)?

Results will tell you which hypothesis is true

How do the data support your claim above?

describe specific part of the procedure.

If you could repeat the experiment and make it better, what would you do differently and why?

If I were able to repeat the lab and do it differently I would try to do two different things to improve it. I would try to create the model in a simpler manner that allowed me to better see how the erosion factored in. I would also try to take more detailed notes on it if I were to repeat it.

Explanation:

when forces are balanced the object does not move.

Explanation:

if you and your friend push both sides of the chair at the same time with the same amount of strength the chair wouldn't move.

Answer:

It depends on the acid.

Explanation:

The conjugate base for a Brønsted-Lowry acid is the product which is produced for the acid losing a proton. For example, the conjugate base of NH3 in:

NH3 (aq) + H2O (l) -> NH4^+ (aq) + OH^-

would be NH4^+/ the base produced from NH3 donating a H+ proton.

When the leaving group in a reaction is changed from Br- to F-, the reaction's is affected due to the differences between the two leaving groups, so the reaction rate may decrease due to the decreased leaving group ability of F-.

Bromide (Br-) is considered a better leaving group than fluoride (F-) due to its larger atomic size, weaker bond strength, and higher polarizability. The larger atomic size allows bromide to more readily accept the negative charge that develops upon leaving, thereby stabilizing the transition state. The weaker bond strength between the bromine atom and the rest of the molecule also contributes to bromide's superior leaving group ability, as it requires less energy to break the bond.

In contrast, fluoride (F-) has a smaller atomic size, stronger bond strength, and lower polarizability, as a result, it is less effective in stabilizing the negative charge that develops upon leaving. The stronger bond strength between the fluorine atom and the rest of the molecule also makes it harder for the bond to break, reducing the reaction rate. When the leaving group is changed from Br- to F-, the reaction rate may decrease due to the decreased leaving group ability of F-. Consequently, the reaction's efficiency and overall success may also be compromised.

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The bohr's model of the atom: Electrons exist in discrete energy levels, transition between levels by absorbing/emitting energy, energy levels farther from the nucleus have higher energy, and Chadwick's discovery of the neutron explained nuclear stability.

The following statements that are true about Bohr's model of the atom, including Chadwick's discovery:

1. Electrons exist in discrete energy levels or orbits around the nucleus.

2. Electrons can transition between energy levels by emitting or absorbing energy in discrete amounts.

3. The energy levels farther from the nucleus have higher energy.

4. Electrons in the lowest energy level (closest to the nucleus) have the lowest energy and are more stable.

5. Chadwick's discovery of the neutron helped to explain the stability of atomic nuclei by accounting for the neutral charge and adding mass to the nucleus.

Please note that while the Bohr model made significant contributions to our understanding of the atom, it has been refined and expanded upon by subsequent atomic models, such as the quantum mechanical model.

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Answer:

creo q es electrico

Explanation: