C-14 is an isotope of the element carbon. How does it differ from the carbon atom seen here?

A) C-14 has two more protons.

B) C-14 has two more neutrons.

C) C-14 has a larger atomic radius.

D) C-14 has two additional valence electrons.


This column of the periodic table represents the halogen family. This is a family of reactive elements. How do the members of the family differ? How are they alike?

A) The mass numbers differ; they have the same number of protons and valence electrons.

B) They have different atomic numbers and mass numbers; they have the same number of electrons.

C) They have different atomic numbers and mass numbers; they have the same number of valence electrons.

D) They have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.


Young stars, just beginning their life in the galaxy, would contain mostly

A) carbon.

B) helium.

C) iron and nickel.

D) hydrogen and helium

The mixing of two particular liquids are spontaneous nonetheless due to the increase in disorder that accompanies formation of the solution.

A spontaneous reaction is one that favours the creation of products under the reaction's current circumstances. An illustration of a spontaneous response is a raging campfire (see illustration below). A fire is exothermic, which implies that when heat is discharged into the environment, the energy of the system decreases. Since gases like carbon dioxide and water vapour make up the majority of a fire's byproducts, the entropy of the system rises during most combustion reactions. Because of this drop in energy and rise in entropy, combustion processes take place on their own.

A nonspontaneous reaction is one that, under the specified conditions, does not favour the creation of products. A driving force or driving factors must favour the reactants over the products for a reaction to be nonspontaneous. In other words, the reaction is endothermic, the entropy is reduced, or both. The majority of the gases that make up our atmosphere are a combination of nitrogen and oxygen. The formation of nitrogen monoxide from these gases might be represented by an equation.

Learn more about Spontaneous:

https://brainly.com/question/30127476

#SPJ4

The valence electrons are located in an atom's outermost energy level

In an atom, there are levels of energy in the shell and subshell  

This energy level is expressed in the form of electron configurations.  

Electrons fill the orbitals based on the Aufbau principle, namely the filling of electrons starts from the lowest energy level

Usually used in describing Lewis structures, placed around the element

Each orbital in an atom consists of 4 quantum numbers  : n, l, ml, ms

Each electron has a different quantum number and this conforms to Pauli's rule: no electrons have the same 4 quantum numbers

Valence electrons are electrons used in a chemical bond , and  in an atom's outermost energy level

Noble gas has a stable electron configuration of 8 valence electrons which guides the formation of chemical bonds called the octet rule

The terms "soluble", "solubility", and "hydrolysis" are important when discussing the solubility of compounds.

Out of the given compounds, \(PbCO_3\) (lead carbonate) has a solubility greater than that calculated from its solubility product due to hydrolysis of the anion present. This occurs because the carbonate ion (\((CO_3)^2-\)) can undergo hydrolysis in water, forming bicarbonate ions (\((HCO_3)^-\)) and hydroxide ions (\((OH)^-\)). The reaction is as follows:
\((CO_3)^2- + H_2O <-->(HCO_3)^- + (OH)^-\)
The formation of hydroxide ions increases the solubility of \(PbCO_3\) by shifting the equilibrium towards dissolution. This leads to a greater solubility than what would be calculated from the solubility product alone.

To learn more about solubility click here https://brainly.com/question/28170449

#SPJ11

The relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

The weight of an object is determined as the product of the object's mass and acceleration due to gravity.

F = mg

The gravitational force between two objects in the universe is directly proportional to the product of mass of the objects and inversely proportional to the square of the distance between the objects.

\(F = \frac{GmM}{R^2} \)

\(mg = \frac{GmM}{R^2} \\\\ g = \frac{GM}{R^2} \)

where;

M is the mass of the earth

R is the radius of the earth

Thus, the relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

Learn more about Newton's gravitational law here: https://brainly.com/question/9373839

Approximately 6.73 g of sodium nitrite (NaNO2) should be added to the 1.00 L solution of nitrous acid (HNO2) to create a buffer with a pH of 2.86.

To calculate the mass of sodium nitrite required, we need to consider the Henderson-Hasselbalch equation for a buffer solution:

pH = pKa + log([A-]/[HA])

Given:

pH = 2.86

Ka (HNO2) = 4.0 × 10^(-4)

From the equation, we can see that [A-]/[HA] is the ratio of the concentrations of the conjugate base (NO2-) to the acid (HNO2). In a buffer solution, this ratio should be equal to 1 for maximum buffering capacity.

First, we need to calculate the concentration of nitrous acid (HNO2) in the solution:

Concentration (HNO2) = Mass (HNO2) / Volume (solution)

= 23.52 g / 1.00 L

= 23.52 g/L

Next, we can use the Henderson-Hasselbalch equation to find the ratio [A-]/[HA]:

2.86 = -log10(4.0 × 10^(-4)) + log10([A-]/[HA])

log10([A-]/[HA]) = 2.86 + log10(4.0 × 10^(-4))

[A-]/[HA] = 10^(2.86 + log10(4.0 × 10^(-4)))

Now, we can calculate the concentration of the conjugate base (NO2-) and the acid (HNO2) in the solution:

Concentration (NO2-) = [A-] = [A-]/[HA] * Concentration (HNO2)

Concentration (HNO2) = [HA] = Concentration (HNO2)

To find the mass of sodium nitrite (NaNO2), we need to consider the molar mass and stoichiometry:

Molar mass (NaNO2) = Sodium (Na) + Nitrogen (N) + Oxygen (O) = 22.99 g/mol + 14.01 g/mol + 16.00 g/mol = 52.00 g/mol

Mass (NaNO2) = Concentration (NO2-) * Volume (solution) * Molar mass (NaNO2)

Mass (NaNO2) = [A-] * 1.00 L * 52.00 g/mol

Finally, we can calculate the mass of sodium nitrite required:

Mass (NaNO2) = [A-] * 1.00 L * 52.00 g/mol

= [A-] * 52.00 g

Approximately 6.73 g of sodium nitrite (NaNO2) should be added to the 1.00 L solution of nitrous acid (HNO2) to create a buffer with a pH of 2.86.

To know more about Nitrite, visit : brainly.com/question/14281987

#SPJ11

Answer:

Cl-35 isotope is more abundant.

Explanation:

How to calculate the abundance of isotopes in a mixture from the mass of isotopes and the average atomic mass of the element?

Solution :

Say the % abundance of Cl - 35 is x, i.e, 100 units of Cl contains x units of Cl-35.

Therefore, the % abundance of Cl - 37 is (100 - x).

∴ [35 x + 37 (100-x)] = 35.45 x 100

Simplifying the above equation, we get

-2x + 3700 = 3545

Subtracting 3700 from both sides of the equation, we get

-2x = -155

or, 2x = 155

Dividing both sides of the equation by 2, we get

x = 155 ÷ 2 = 77.5

∴ 100 -x = 22.5

Thus, Cl-35 is more abundant (77.5%) than Cl-37 (22.5%).

To know more about isotopic abundance, visit:

https://brainly.com/question/24873591

An ionic compound's name and formula always place the cation before the anion.

To learn more about ionic compound's refer to:

https://brainly.com/question/2687188

#SPJ4

Answer

its a potassium elements

Explanation:

K 2,8,8,1     period num 4

                  group 1A

or 1s1 ,2s2 2p6, 3s1

its a metal reacted  rapidly with water to form a colorless basic solution of potassium hydroxide (KOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

Answer:

Explanation:

The space between the large nucleus and the electrons is huge. We know this because the alpha particles shot at the gold foil most went right on through. That means that the space between hold atoms is very large.

B

Not only that but the deflection that takes place is not frequent further telling us that the the nucleus must be positively charged. That observation comes from the deflection itself. The charge on the nucleus must be the same as the alpha particle. If they were different, and the nucleus was negative, those particles that were deflected would now be absorbed.

Isotopes are atoms that belong to the same element: 11 protons, 10 neutrons, 11 electrons, 13 protons 14 neutrons, and 13 electrons

An isotope is one of two or more atom types of a chemical element that share the same atomic number, position on the periodic table, chemical behavior, and physical properties, but differ in atomic mass. One or more isotopes can be found in any chemical element. The number of protons in an atom's nucleus is the first criterion for determining its identity and labeling.

The observation that all atoms with the same atomic number have roughly the same chemical properties—if not exactly the same—gives this atomic number its significance. The symbol Z is typically used to represent this number. An ingot of pure uranium, for instance, only contains atomic number 92 atoms. Each atomic number has a place on the periodic table of elements, and each of these places is labeled with the element's common name, like calcium, radon, or uranium.

Learn more about isotopes :

brainly.com/question/28039996

#SPJ1

The best estimate for the amount of energy released in this hypothetical nuclear decay process is approximately 1.503 x 10^-10 joules.

The amount of energy released in a nuclear decay process can be calculated using Einstein's famous equation:

E = mc^2

where E is the energy released, m is the mass that is transformed, and c is the speed of light.

In this hypothetical nuclear decay process, the mass of one proton is transformed into energy. The mass of a proton is approximately 1.0073 atomic mass units (amu) or 1.6726 x 10^-27 kg. Using this value for m, and the speed of light, c = 299,792,458 m/s, we can calculate the energy released:

E = (1.6726 x 10^-27 kg) x (299,792,458 m/s)^2

E = 1.503 x 10^-10 joules

For more question on energy click on

https://brainly.com/question/5650115

#SPJ11

Answer:

Water(H20)

Explanation:

Water is called the universal solvent because more substances dissolve in water than in any other chemical. This has to do with the polarity of each water molecule. The hydrogen side of each water (H2O) molecule carries a slight positive electric charge, while the oxygen side carries a slight negative electric charge.

There are 0.83 moles of ammonium ions present in 567 mL of solution.

This can be calculated by first converting the given amount of ammonium sulfate into moles (0.083 moles) and then multiplying it by the number of ammonium ions present in each mole of ammonium sulfate (2). The resulting number is 0.83 moles of ammonium ions. This number can then be converted to milliliters using the molarity equation (M = n/V). This equation can be rearranged to solve for n (the number of moles). Plugging in the values from the given problem yields n = 0.83 moles of ammonium ions present in 567 mL of solution.

To know more about  ammonium ions  refer to the link brainly.com/question/11173657

#SPJ4

1) Noble gases. Elements in the periodic table are organized in groups. We can find the noble gases in the eighteenth group (column).

2) Zoom in to the right part of the periodic table.

We can see in this image that Krypton (Kr), Neon, and Argon ARE noble gases.

Iron is NOT a noble gas.

.

Answer:

0.603J/g°C is the specific heat of the metal object

Explanation:

To solve this question we must know the heat given by the metal is equal to the heat absorbed by the water. The change in heat follows the equation:

Q = m*S*ΔT

Where Q is heat in Joules, m is the mass of the substance, S its specific heat and ΔT change in temperature

The equation to solve the problem is:

m(Object)*S(Object)*ΔT(Object) = m(Water)*S(Water)*ΔT(Water)

Where:

m(Object) = 29.0g

S(Object) = ??

ΔT(Object) = (97.0°C - 23.7°C = 73.3°C)

m(Water) = 95.8g

S(Water) = 4.184J/g°C

ΔT(Water) = (23.7°C - 20.5°C = 3.2°C)

29.0g*S(Object)*73.3°C = 95.8g*4.184J/g°C*3.2°C

S (Object) * 2125.7g°C = 1282.6J

S(Object) = 0.603J/g°C is the specific heat of the metal object

Answer:

B

Explanation:

because HCl donates a proton to water. Therefore, HCl is an acid. H2O accepts a proton from HCl. Therefore, H2O is a base.

Answer:

Examples of how the ideas can be applied to the issues and practices of hydraulic fracturing for the acquisition of shale gas are;

Reuse; The produced water in obtained from oil and gas well production are reused for fracking, drilling, and if the water is good enough, it can be used for farming

Reduce; The use of recycled brine and water in drilling and fracking process reduces the application of freshwater in the those processes and reduces pollution of natural water sources

Recycle; Recycling involves creating products from waste. In the hydraulic fracturing process approximately 13 percent of the water produced and the flowback water are recycled to be used more than once thereby reducing the net consumption of freshwater

Explanation:

In hydraulic fracturing, also known informally as fracking, is the drilling method used in oil and gas well development process that makes use of water sand and chemical injection through the well bore to open and widen cracks in the bedrock formations in the areas around the wellbore.

To produce exactly 20 moles of CO₂ from the reaction, 30 moles of O₂ are required.

During a chemical reaction, reactants interact chemically and change into products. As an example, when we breathe in oxygen, it reacts with glucose to create carbon dioxide, water, and energy.

The chemical reaction is said to be balanced when there are equal numbers of each type of atom in the reaction on both the reactant and product sides of the equation. An equilibrium chemical equation will have an equal distribution of mass and change.

Given chemical reaction,

CH₃OH + O₂ = CO₂+H₂O

balance the given reaction,

20 CH₃OH + 30 O₂ = 20 CO₂+ 40 H₂O

We can use a proportion with the mole ratios,

20 moles CO₂/2 moles CO₂ = x moles O₂/3 moles O₂

x moles O₂ = 10 × 3

x moles O₂ = 30moles of O₂.

To know more about chemical reaction visit:

https://brainly.com/question/29039149

#SPJ4

The two carbon-sequestering methods that could reduce the impact of deforestation are afforestation and agriculture.

Carbon sequestering

Afforestation

Agriculture

Learn more about carbon sequestering here:

brainly.com/question/18392835?referrer=searchResults

According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

Answer:

Explanation:

Common cations found in hard water include Ca2+ and Mg2+. These ions enter a water supply by leaching from minerals within an aquifer.

Answer:

Molar mass is 325.33

Explanation:

Molar mass is 325.33

There are 0.076 moles of calcium atoms or 3.05 g of calcium.

We can start by using Avogadro's number, which tells us that there are 6.022 × 10²³ atoms in one mole of any substance.

First, we can find the number of moles of calcium atoms by dividing the given number of atoms by Avogadro's number:

4.58 × 10²¹ atoms / 6.022 × 10²³ atoms/mol = 0.076 moles of calcium atoms

Next, we can use the molar mass of calcium to convert from moles of atoms to moles of calcium:

0.076 moles of calcium atoms × (40.08 g/mol) / (1 mol) = 3.05 g of calcium

Learn more about moles: brainly.com/question/29367909

#SPJ11

The mass of an object is a measure of the total amount of matter present in it. Mass is usually measured in grams (g) or kilograms (kg).The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.

The given data is;

volume = 49 cm³,
density = 63 g/cm³.

Now, we have to calculate the mass of the object.

Density = mass / volume
Mass = density × volume

Substitute the given values in the above equation.

Mass = 63 × 49

Mass = 3087 g or 3.087 kg

The mass of the object is 3087 g or 3.087 kg.

The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg. It means the mass of the object is 3087 times its volume.

The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.

to know more about Density visit:

brainly.com/question/29775886

#SPJ11

A chemical formula is a group of chemical symbols and numbers that express the elements and the number of atoms of each element that compose a compound.

A chemical formula of a compound offers information about the proportions of each chemical element in a given chemical compound or molecule.

The chemical formula of a compound can be written by including the chemical symbols of elements, numbers as subscripts, and symbols, such as plus (+) and minus (−) signs, dashes, commas, and brackets.

A chemical formula exhibits no words but simple chemical structures can be drawn but not full structures. Chemical formulae must be limited in power rather than chemical structural formulae.

Learn more about chemical formula, here:

brainly.com/question/11140581

#SPJ1

Answer:

i. Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

On moving from left to right  ( Mg, K) in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.

As moving from top to bottom, there is an addition of shell around the nucleus and the outermost shell gets far away from the nucleus and hence, the distance between the nucleus and outermost shell increases.

Thus the order of atomic radii is : Ca > Mg > K

ii. The energy required to remove the last valence electron from isolated gaseous atom (first ionization energy) increases as we move from left to right in a period. It decreases on moving from top to bottom.

Thus the order of first ionization energy is : K > Mg > Ca

iii. The chemical properties depend on the valence elctrons and as the elements Mg and Ca both have two valence electrons , they have same chemical properties.

Answer:

Atomic radius

Explanation:

Hope this helps!

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electrons.

Explanation:

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electron

The number of ionic bond in copper is zero.

Pure copper or any pure metal for that matter are examples of metallic bonds, which are neither ionic nor covalent. The copper atoms are stacked very tightly in a solid lattice. In fact it has a face centered cubic lattice which is the closed packing of atoms possible. Each atom has twelve nearest neighbors which allows their 4s orbitals (mostly) to have the optimal overlap. All of these orbitals therefore combine in one gigantic band of delocalized orbitals that spans the entire crystal with its myriad atoms. This band is only partly filled and the difference in energy between one state and the next is puny, which explains copper’s outstanding conductive properties.

Therefore, the bonding in copper has a metallic character.

To know more about copper bonding,

https://brainly.com/question/20897148

https://brainly.com/question/17215770