what occurs when potassium reacts with chlorine to form potassium chloride

Answer : The mass of oxygen is 160 grams.

Solution : Given,

Moles of [tex]O_2[/tex] = 5 moles

Molar mass of [tex]O_2[/tex] = 32 g/mole

Formula used :

[tex]\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2[/tex]

[tex]\text{ Mass of }O_2=(5moles)\times (32g/mole)[/tex]

[tex]\text{ Mass of }O_2=160g[/tex]

Therefore, 160 grams of [tex]O_2[/tex] are in 5.0 moles of the oxygen gas.

the answer is c) 11.2 L

edge 2021

Answer:

Mass of 2 moles of [tex]^{238}\textrm{U}[/tex] is 476.1 g

Explanation:

Answer:

Yes

Explanation:

2Na + 2H2O → 2NaOH + H2

A chemical equation is balanced if the number of atom of elements on the reactant side is equal to the number of atom of elements on the product sides.

According to the equation above the chemical equation is balanced .From the equation 2 moles of sodium reacted with 2 moles of water to form 2 moles of sodium hydroxide and hydrogen gas.

On the reactant side(left side), the sodium has 2 atom of sodium and the water molecule has 4 atom of hydrogen and 2 atom of oxygen.

On the product side(product side), the sodium hydroxide compound have 2 atom of sodium , 2 atoms of oxygen and 2 atoms of hydrogen . The hydrogen gas has 2 atoms of hydrogen. Adding the hydrogen atom on the product side will give you 4 atoms of hydrogen.

From the illustration above you could notice the equation is balanced.

Final answer:

To determine the empirical formula for a compound containing phosphorus and chlorine, convert mass to grams, calculate moles using molar mass, then find the whole-number ratio of elements. The empirical formula is PCl3.

Explanation:

To determine the empirical formula for a compound containing phosphorus (P) and chlorine (Cl), we first need to convert the mass of each element from milligrams to grams for consistency with molar mass units. The mass of P is 10.15 mg, which equates to 0.01015 g, and the mass of Cl is 34.85 mg, which is 0.03485 g.

Next, we use the molar mass of each element (P: 30.97 g/mol, Cl: 35.45 g/mol) to convert the mass of each element to moles. For P, 0.01015 g × (1 mol / 30.97 g) = 0.0003277 mol. For Cl, 0.03485 g × (1 mol / 35.45 g) = 0.0009830 mol.

To find the whole-number ratio, we divide the moles of each element by the smallest number of moles obtained from the calculation:

Therefore, the empirical formula for the compound is P1Cl3.

Answer:

D) double-displacement

Explanation:

In a displacement reaction, one or more atoms replace one or more atoms of a given molecule to form a new one.

In this case, two atoms of K replace two atoms of H in the water molecules two form H2 and KOH.

Is double because two displacement happen in the global reaction equation.  

Sodium sulfate (Na2SO4) is the ionic compound most likely to dissolve in water among the options provided.

The student is asking which of the listed ionic compounds is most likely to dissolve in water. Looking at the options, we have Calcium sulfate (CaSO4), Sodium sulfate (Na2SO4), Barium sulfate (BaSO4), and Strontium sulfate (SrSO4). According to solubility rules, most sulfate salts are soluble except for some exceptions, including BaSO4, SrSO4, and CaSO4. Given that sodium compounds are generally highly soluble, Na2SO4 is the compound that is most likely to dissolve in water. This is because there is less size mismatch between the Na+ and SO4(2-) ions compared to the other pairs of ions, which fits the trend that smaller size mismatches lead to greater solubility.

Final answer:

The correct answer is "atomic mass & atomic number". During nuclear decay by gamma rays, only the energy content of the nucleus changes; atomic mass and atomic number remain constant.

Explanation:

In the process of nuclear decay by gamma rays, there is no change in the atomic mass or atomic number of the nucleus. The only change that occurs during gamma decay is in the energy content of the nucleus. During gamma decay, a nucleus in an excited state drops to a lower energy state by emitting high-energy photons known as gamma rays. This is often represented by the metastable state, labeled with an 'm' next to the mass number. Despite this change in energy, the number of protons (atomic number) and the combined number of protons and neutrons (atomic mass) remain unchanged.

Answer:

wavelength

Explanation:

The distance from one crest to the next crest is called the wavelength.

Atoms of different elements cannot have the same atomic number since only atoms of the same kind unite to produce an element. Atoms from different elements may have distinct atomic numbers. Therefore, the correct option is option d.

Element is made up of atoms or atoms together to make element. Atoms of a given element are always the same, which means that all of the properties among all atoms within one kind of element are the same.

Two or more atoms with dissimilar physical or chemical characteristics cannot unite to form an element. For Krypton element,  the number of protons, electron, and neutrons are 36, 36, and 48 respectively.

Therefore, for Krypton element,  the number of protons, electron, and neutrons are 36, 36, and 48 respectively. the correct option is option d.

To know more about element, here:

https://brainly.com/question/8460633

#SPJ2

Water has high heat specific capacity. Heat specific capacity is the amount of heat that is needed to raise the temperature of one gram of particular substance by one degree Celsius. The high specific heat capacity of water is due to the hydrogen bond that exist among the molecules of water. The hydrogen bond is quite strong and it will take a lot of heat to break the bonds. Thus, it takes a lot of heating to increased the temperature of water by one degree Celsius. This is also the reason why water has high boiling point.

OPTION A

The mass of a sample containing a radioactive element decreases to half its original value during its half-life, following an exponential decay pattern.

During the half-life of a radioactive element, the mass of a sample containing this element decreases to half its original value. For instance, if we start with 100 grams of a radioactive isotope, after one half-life period, the sample will have decayed to provide 50 grams of the radioactive isotope. As time progresses and several half-lives pass, the amount present continues this pattern of reduction. After two half-lives, this amount will be 25 grams, and so on. This decay process follows what is known as exponential decay, where with each half-life, half of the remaining radioactive nuclei decay.

https://brainly.com/question/24710827

#SPJ2

Among the given options, MgF2 is an ionic compound.

An ionic compound is formed between a metal and a nonmetal. Among the options given, H2O and C2H4 are covalent compounds because they contain only nonmetal elements. NH3 is also a covalent compound because it contains only nonmetals. On the other hand, BrCl is a covalent compound because it contains two nonmetals. Lastly, MgF2 is the correct answer because it contains the metal magnesium (Mg) and the nonmetal fluorine (F). Therefore, MgF2 is an ionic compound.

Answer: Option (b) is the correct answer.

Explanation:

When we use a thermometer to measure the temperature of water then heat from the water will lead to represent an increase in the thermometer reading.

This is because heat or warmth from the water will get transferred to the thermometer as a result, the liquid in the thermometer will also get warm.

Therefore, this warmth will increase kinetic energy of the molecules of liquid in the thermometer. Hence, the liquid will spread.

Thus, we can conclude that the liquid in the thermometer to rise because  molecules in the thermometer’s liquid spread apart.

I think the correct answer from the choices listed above is the last option. Household hazardous waste can be eliminated by preparing your own cleaning products using the following ingredients except Windex.

It is a chemical product that is hazardous.

Explanation:

Windex may be a glass and hard-surface cleaner. Windex was unreal by the Drackett Company in 1933 and has been marketed throughout.Windex cannot be used.

Windex is the ingredient that should not be used for preparing non-toxic, homemade cleaning products. Vinegar, baking soda, and cornstarch are all safe alternatives that can effectively clean and reduce household hazardous waste when used in homemade cleaning solutions.

The student's question pertains to the elimination of household hazardous waste by preparing one's own cleaning products. Among the ingredients listed, vinegar, bicarbonate soda (baking soda), and cornstarch are common safe household ingredients used for cleaning purposes. However, Windex is a commercial product which often contains chemicals and is not a suitable ingredient for making your own non-toxic, homemade cleaning products.

Homemade cleaning solutions, such as a mixture of vinegar and baking soda, can serve as effective alternatives to reduce the presence of hazardous substances in the household. These natural products are not only eco-friendly, but also pose less risk to personal health compared to some commercially available cleaners.

Answer:

Mg+2HF>2MgF+H2

Explanation:

Henri Becquerel was studying the properties of X-rays when he discovered radioactivity. Marie Curie concluded that pitchblende must contain another, more radioactive element upon finding it was more radioactive than its uranium content. Curie was not the first to discover X-rays; that was Roentgen.

Henri Becquerel was studying the properties of X-rays when he accidentally discovered radioactivity. He was experimenting with phosphorescent materials and their ability to produce X-rays after being exposed to sunlight when he observed that uranium salts emitted rays without the need for sunlight, leading to the discovery of radioactivity.

Upon isolating uranium from pitchblende and finding that the pitchblende was more radioactive than the purified uranium, Marie Curie concluded that the pitchblende contained unknown radioactive elements. This led to the discovery of two new elements, polonium, and radium, which were significantly more radioactive than uranium.

Becquerel abandoned his first hypothesis, which postulated that fluorescent minerals excited by solar energy emitted X-rays because he found evidence that uranium emits radiation regardless of exposure to sunlight, thus invalidating his original theory. He adapted his hypothesis based on the evidence he collected that showed uranium's radiation was not dependent on light or fluorescence.

Marie Curie had many firsts in her career, but she was not the first to discover X-rays. That discovery was made by Wilhelm Roentgen in 1895. Marie Curie's notable firsts include being the first female Nobel Prize winner, the first female professor at the Faculty of Sciences at the Sorbonne, and the first person to coin the term radioactivity and suggest that atoms could change as part of radioactive decay.

Answer:

Element is a pure substance which cannot be splitted into smaller substances by simple chemical reactions. while Compound is a chemical combination of two or more substances at fixed ratio.