how many milliliters of 2.50 m hcl (aq) are required to react with 8.05 g of an ore containing 44.0% zn (s) by mass? the molecular weight of zn is 65.38 g/mol.

Newton's laws of motion are stated and explained below:

First law - an object remains in its state of motion in a straight line unless acted upon by an external force. This explains why moving objects are reluctant to stop and objects are rest are reluctant to move.

Second law - the change in the momentum of a body is directly proportional to the applied force and takes place in the direction of the applied force. This explains why acceleration increases with force.

Third law - action and reaction are equal and opposite.

This means that every force has a balancing force acting in the opposite direction

Newton's laws of motion are the laws that describe the observed phenomena of objects in motion.

The laws of motion are useful in determining the various features of motion in a straight line such as velocity, acceleration, impulse, and momentum.

Learn more about Newton's laws of motion at: https://brainly.com/question/28171613

#SPJ1

From the problem, we know that:

The half-life of the nuclide is 30 years.

The time that we're going to study are 120 years.

The first thing we need to do is to find the number of half-lives that has elapsed (n). To do this, we divide the time studied by the half life:

How to determine the original mass?

We know that the amount remaining (N) is = 4.1g and the number of half-lives (n) = 4. To find the original amount (No), what we do is to use the following equation:

The original mass of Cs-131 sample was 65.6 grams.

The bolded portion contains an error. The correct correction should be: "This is the seasons."

The bolded portion contains an error. The correct correction should be: "This is the seasons."

The word "the" should be removed in order to have proper grammar. The corrected sentence would read: "This is seasons."

The word "the" is unnecessary in this context, as it does not add any meaning to the sentence.

The corrected version is concise and grammatically correct.

Learn more about bolded portion

brainly.com/question/29176202

#SPJ11

If an atom has one valence electron, it is most likely to form an ionic bond with another atom. The atom that bonds to the atom with one valence electron might have either seven or eight valence electrons.

Ionic bonds occur when one atom transfers its valence electron to another atom. In this case, the atom with one valence electron will likely donate it to the other atom.

The atom that bonds to the atom with one valence electron might have either seven or eight valence electrons. This is because atoms tend to gain or lose electrons in order to achieve a stable electron configuration.

If the atom with one valence electron bonds with an atom that has seven valence electrons, the atom with one valence electron will donate its electron to the other atom, resulting in both atoms achieving a stable configuration.

If the atom with one valence electron bonds with an atom that has eight valence electrons, the atom with one valence electron will transfer its electron to the other atom, resulting in the atom with eight valence electrons achieving a stable configuration.

In both cases, the formation of an ionic bond between these atoms allows them to achieve a stable electron configuration.

Learn more about valence electron -

brainly.com/question/371590

#SPJ11

Answer:

A. Anticline

Explanation:

Answer:A

Explanation:

The limiting reactant: Nitrogen gas (N2)

The excess reactant: Hydrogen gas (H2)

Molar mass of hydrogen gas: 2.016 grams/mol

Molar mass of nitrogen gas: 28.02 grams/mol

Molar mass of ammonia (NH3): 17.04 grams/mol

To find the amount of ammonia produced we can use the concept of limiting reactant. The limiting reactant is the one that runs out first and limits the amount of product that can be formed. In this case, we have 10.0 grams of nitrogen gas and 10.0 grams of hydrogen gas.

To find the amount of ammonia produced, we need to find out which reactant is limiting.

N2 + 3H2 → 2NH3

1 mole of N2 and 3 mole of H2 required for 1 mole of NH3.

10.0 g N2 / 28.02 g/mol N2 = 0.357 moles N2

10.0 g H2 / 2.016 g/mol H2 = 4.96 moles H2

To find the amount of ammonia produced we will use the limiting reactant N2, and it's stoichiometry in the reaction.

0.357 moles N2 * 2 moles NH3 / 1 mole N2 = 0.714 moles NH3

And to find the mass of ammonia produced we can use the molar mass of NH3

0.714 moles NH3 * 17.04 g/mol NH3 = 12.16 grams

Amount of ammonia produced: 12.16 grams

anaphase

or if not

telophase

Explanation:

To get a better understanding of the answer,let's take use of Fajan's rule which says that no bond is neither purely covalent or purely ionic.

For ionic compounds MP and BP are higher than covalent compounds. So in order to find the one with higher MP,it's enough to find the most ionic compound among the given options.

In LiF,LiCl,LiBr and LiI,The cation is same and anion only differs.According to Fajans rule Smaller anion and larger cation favours ionic bonding and vice versa. Since Fluoride is the smallest anion,LiF is the most ionic compound and hence it is the one with highest MP from the options.Hope it helps

Answer:

20 degrees Celsius

Explanation:

For a given fluorophore, absorption < fluorescence < phosphorescence is correct.

Fluorescence, absorption, and phosphorescence are all related to the way light interacts with matter.

Absorption occurs when a molecule absorbs a photon of light, which causes an electron to jump to a higher energy level. This process occurs at a specific wavelength, which is unique to each molecule. The absorbed energy is usually converted into heat or used to drive a chemical reaction.

Fluorescence occurs when a molecule that has been excited by absorbing light emits a photon of light as it returns to its ground state. This process occurs at a longer wavelength than the absorbed light, and the emitted light is usually of a different color than the absorbed light. Fluorescence occurs quickly, typically within nanoseconds of the molecule being excited.

Phosphorescence is a type of delayed fluorescence that occurs when a molecule remains in an excited state for a longer period of time, typically microseconds to seconds. During this time, the molecule can emit light as it returns to its ground state. Phosphorescence occurs at an even longer wavelength than fluorescence.

The order of these processes in terms of wavelength is absorption < fluorescence < phosphorescence. When a molecule absorbs light, it does so at a specific wavelength. When it fluoresces, it emits light at a longer wavelength. When it phosphoresces, it emits light at an even longer wavelength. Therefore, the wavelength increases as we move from absorption to fluorescence to phosphorescence.

To know more about the fluorophore refer here :

https://brainly.com/question/30554390#

#SPJ11

Answer:

mass is the amount of matter in an object

Explanation:

The complete chemical equation of the chemical reaction in which Beryllium chloride is heated with potassium to produce beryllium and potassium chloride is as follows:

Chemical equations are symbols and chemical formulas that depict a chemical reaction symbolically.

Chemical equations use the symbols of the elements, ions, or compounds that are involved in the reaction to represent the reaction.

The given reaction describes how Beryllium can be extracted from beryllium chloride.

The chemical reaction is as follows: Beryllium chloride is heated with potassium to produce beryllium and potassium chloride.

The chemical equation of the reaction is as follows:

BeCl₂ + 2 K ---> Be + 2 KCl

Learn more about chemical equations at: https://brainly.com/question/26227625

#SPJ1

What answers are there? you didn't add them.

physical change and chemical change.

physical change affects a substance's physical properties, and a chemical change affects its chemical properties.

Answer:

boiling water

sharpening a pencil

freezing water

Answer:

C. Partial charges in water molecules attract the charges in the atoms of the ionic crystal, pulling the atoms off the crystal.

Explanation:

Water consists of partial positive and hydrogen ions and partial negative oxygen ions. The ionic crystals also dissociate into ions when in water.These partial charges and ability of ionic compounds to dissociate in water are the main reason why ionic crystals dissolve in water.

The partial charges in the water molecules form a strong attraction towards the charges in the atoms of ionic crystals. This then pulls the atoms from the crystals and ends up in the dissolution of the ionic crystals.

Answer:

A and E

Explanation:

with Adenine ,thymine , cytosine and guanine

Answer:

4.22

Explanation:

pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes hydrogen.

pH helps to find the acidity or alkalinity of an aqueous solution.

The number of hydrogen ions (protons) present in a solution is determined by the pH scale.

A pH greater than 7 makes the water more alkaline and a pH less than 7 makes the water more acidic.

\(pH=-\log [H^+]=-\log [0.00006]=4.22\)

Answer:

42. The statement is "The value of ΔH° for the overall reaction is large and negative".

43. The value of the enthalpy change is -93kJ.

Explanation:

42. The Kp depends on the ΔH° as both are related by ΔG formula, so the statement that identifies the reason of Kp value is "The value of ΔH° for the overall reaction is large and negative".

If ΔH° is negative, then the calculation of Kp will be a large number, because the formula of Kp is:

43. To calculate the value of the enthalpy change per mole of HCl produced, it is necessary to write the whole final reaction from the reactions in steps 1, 2 and 3 (multiplying or dividing the enrgies, just like the equations). Then, we have to sum all the final energies:

In this case, it is not necessary to multiply or divide the equations, because each H cancels, and each Cl cancels as well.

-186 kJ is the enthalpy change for the whole reaction, where 2 moles of HCl are produced. So, to calculate the enthalpy change for 1 mole of HCl, we have to divide it by 2.

Finally, the value of the enthalpy change is -93kJ.

5.14m/s ...............................................

Answer:

27.5°C = Final Temperature of the metal

Explanation:

The change in temperature using the specific heat of a material could be obtained using the formula:

Q = m*S*ΔT

Where Q is heat absorbed in Joules = 128J in the problem

m is the mass of the substance = 10.5g

S is Specific Heat of the substance = 0.449J/g°C for Iron

ΔT is change in temperature = Final T - Initial T

Replacing:

128J = 10.5g*0.449J/g°C*ΔT

2.5°C = ΔT

2.5°C = Final T - 25°C

Answer:

radioactive

Explanation:

becasue i said so. Periodt

Answer:

An unstable isotope emits some kind of radiation, that is it is radioactive.

Explanation:

The mass of potassium hydroxide required to neutralize 0.955 moles of sulfuric acid is 107.08 grams.

The balanced equation you provided is for the reaction of potassium hydroxide with sulfur dioxide, not sulfuric acid. The correct equation is:

2KOH(aq) + H2SO4(aq) → K2SO4(aq) + 2H2O(l)

To find the mass of potassium hydroxide required to neutralize 0.955 moles of sulfuric acid, you can use the mole ratio between potassium hydroxide and sulfuric acid in the balanced equation, which is 2:1. That means you need twice as many moles of potassium hydroxide as sulfuric acid to completely neutralize it.

So, the number of moles of potassium hydroxide required is 2 x 0.955 = 1.91 moles.

To calculate the mass of potassium hydroxide required, you can use its molar mass, which is 56.11 g/mol:

mass = number of moles x molar mass

mass = 1.91 moles x 56.11 g/mol

mass = 107.08 g

For more such questions on sulfuric

https://brainly.com/question/15837273

#SPJ11

The rate at which atoms of radioactive sources, or radionuclides, disintegrate is measured in curies. A curie is a unit of measure for the amount of radioactive material present. It represents the amount of radioactive material in which 37 billion atoms disintegrate per second.

The disintegration of radionuclides produces ionizing radiation, which can be measured in rems or roentgens.

A rem is a unit of measurement for the amount of ionizing radiation absorbed by living tissue, while a roentgen is a unit of measurement for the amount of ionizing radiation in the air.
In summary, the rate at which atoms of radioactive sources disintegrate is measured in curies, while the amount of ionizing radiation produced by the disintegration can be measured in rems or roentgens. It is important to understand these units of measurement in order to properly monitor and regulate exposure to ionizing radiation, as it can have harmful effects on living organisms.

The rate at which atoms of radioactive sources (radionuclides) disintegrate is measured in curies (c).
To explain further, radioactive sources contain unstable atoms, called radionuclides. These radionuclides undergo disintegration or decay, during which they emit radiation. To quantify this process, we use various units.
Curies (Ci) is a unit of measurement specifically used to express the activity of a radioactive substance, or how quickly atoms in the radioactive source are disintegrating. One curie represents 37 billion disintegrations per second.

It's important to note the other units you mentioned:
- Rems (roentgen equivalent in man) is a unit used to measure the biological impact of ionizing radiation on human tissue.
- Roentgens (R) is a unit used to measure the exposure to ionizing radiation, specifically the amount of radiation that produces a certain amount of ionization in air.
- Rods is not a unit related to radioactivity, but might be confused with control rods, which are used in nuclear reactors to control the rate of nuclear reactions.

In summary, the appropriate unit for measuring the rate at which atoms of radioactive sources disintegrate is curies.

Learn more about radioactive at : brainly.com/question/1770619

#SPJ11

Soaps clean up dirt by acting as emulsifying agents. The nonpolar chain in the soap is attracted to the dirt and the ionic end is attracted to the water. Thus, the soap creates b)dispersed droplets that wash the dirt away with the water.

In the field of chemistry, soap can be described as a washing material that is made by adding a base to a fat or oil.

As it contains fats and oils, soaps work by acting as an emulsifying agent.

The non-polar fats and oil absorb any kind of dirt and kill microorganisms.

When water is added to soap, the mixture acts as a dispersed droplet to absorb dirt particles in it. In this way, any kind of dust, microorganisms and dirt are removed.

The correct question format is:

Soaps clean up dirt by acting as emulsifying agents. The nonpolar chain in the soap is attracted to the dirt and the ionic end is attracted to the water. Thus, the soap creates ............. that wash the dirt away with the water.

a) floating bubbles

b) dispersed droplets

c)solid precipitate

To learn more about soaps, click here:

https://brainly.com/question/15188106

#SPJ4

Balanced equation :

C₂H₆+7O₂⇒4CO₂+6H₂O

Conservation of mass :

In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

This is the basis of reference, that the total atoms in the reactants will be equal to the total atoms in the product

The elements in the reaction will also be found in the product, but in the form of other compounds

Reaction

\(\tt C_2H_6+O_2\rightarrow CO_2+H_2O\)

Let's look at the number of atoms in the reactants and products

C,left=2, right=1

H,left=6, right 2

O,left=2, right 3

So the equation not balanced

To balance, we can use the formula for burning alkanes or by using mathematical equations

1. Formula(in this case the hydrocarbon is ethane,n=2)

\(\large {\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \dfrac {3n + 1} {2} O_2 \rightarrow nCO_2 + (n + 1) H_2O}}}\)

2. Mathematical equations

give equation

C₂H₆+aO₂⇒bCO₂+cH₂O

C,left=2, right=b⇒b=2

H,left=6,right=2c⇒2c=6⇒c=3

O,left=2a,right=2b+c⇒2a=2b+c⇒2a=2.2+3⇒2a=7⇒a=7/2

C₂H₆+7/2O₂⇒2CO₂+3H₂O x 2

C₂H₆+7O₂⇒4CO₂+6H₂O

Answer:

An ionic bond occurs between two opposite charges are attracted

Explanation: Two opposite charges are attracted to each other

0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

We can use the balanced chemical equation to determine the stoichiometry of the reaction and calculate the number of moles of HBr produced.

From the balanced chemical equation:

1 mol of H2 reacts with 1 mol of Br2 to produce 2 moles of HBr.

Since we are given the volume of hydrogen gas, we need to convert it to moles using the ideal gas law:

PV = nRT

Where

Assuming standard temperature and pressure (STP) conditions of 0°C and 1 atm, the volume of 6.6 L of hydrogen gas is:

n = PV/RT = (1 atm) x (6.6 L) / [(0.08206 L atm mol^-1 K^-1) x (273 K)]

n = 0.270 mol

Since the balanced chemical equation tells us that 2 moles of HBr are produced for every 1 mole of H2, we can calculate the number of moles of HBr produced as:

moles of HBr = (0.270 mol H2) x (2 mol HBr/1 mol H2) = 0.540 mol HBr

Therefore, 0.540 moles of hydrogen bromide can be made from 6.6 L of hydrogen gas.

Learn more about ideal gas law here : brainly.com/question/909628

#SPJ1