Fossil A is estimated to be 5,000 years old and fossil B is estimated to be 2,000 year old. If the two fossils had the same amounts of radioactive carbon-14 when they were formed, which of the following statements is true?

Select one:

a. Fossil A contains more carbon-14 than fossil B does.

b. Fossil A and fossil B contain approximately the same amounts of carbon-14.

c. Fossil B contains more carbon-14 than fossil A does.

d. Not enough information given.

​

Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Answer:

The volume of a given mas of a gas is directly proportional to the temperature if the pressure remains constant

V is directly proportional to T

V=1/T

V=constant/T

Explanation:

Charles law states that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.

e.g., In winters as the temperature falls off, when you take a basketball outside in the ground the ball shrinks.

The mathematical equation that represents Charles law:

V₁/T₁ = V₂/T₂

where, V₁ = initial volume

T₁ = initial absolute temperature

V₂ = final volume

T₂ = final absolute temperature

The applications of Charles law has in daily life are:

A gas-filled balloon experiment:

If a balloon is filled with air, it will shrink when cooled and the balloon expands if heated. This happens because the air inside the balloon, which is a gas molecules, occupies a smaller volume when it is cool, and occupies  a larger volume when it is hot.

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Borosilicate glass test tubes typically work well for heating because they can endure high temperatures without cracking or breaking.

Some forms of glass, such soda-lime glass, may not be able to resist high temperatures and may shatter or break when heated, such as test tubes.

Before to heating glassware, it is crucial to always review the manufacturer's instructions for that particular type of glassware. Also, heated glassware should be handled carefully because it can get quite hot and result in burns or other injuries.

While handling hot glassware, always use the proper safety gear, such as heat-resistant gloves or tongs.

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Answer:

81 °C

Explanation:

This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:

q = heat added/released by a sample

m = mass of sample

c=specific heat of sample

ΔT = change in temperature

from here we can rearrange the equation to state:

q/(mc) = ΔT

1200J/((20.0g)(4.2J/g•°C)) = ΔT

14°C = ΔT

If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.

Answer:

C. 81 c

Explanation:

took the test :)

Answer:

D) The solution in the unknown beaker is 0.5NaCL, and the common chloride ion is reducing the solubility of the KCL .

Explanation: Just got it correct on USATESTPREP :)

Answer:

False

Explanation:

A model is a representation of a more complex system.

Answer:

False

Definition:

The scientific model is a condensed depiction of complicated or invisible to the human sight scientific systems, such an atom or a solar system. Although this representation is simplified, it is nevertheless accountable for producing all of the original systems' essence, substance, and behavior. This allows the models to be employed in scientific studies and research and to provide tangible outcomes that accurately reflect the actual systems.

What is a scientific model?

A scientific model is a simplification that roughly represents the real world while making it simple to think about issues, gain clarity and understanding, and perhaps forecast behavior.

Say, "The world is flat!" as an example. Actually, if you were alive 10,000 years ago, this estimate wasn't so awful. In general, everything you see around you suggests that the globe *is* flat, especially if you're living on a large grassy plane. Forget some of the boundary difficulties around the "edge of the globe"; perhaps it just never ends.

Then, though, you could start to see ships if you go to the ocean and stare out across that huge horizon. The sail is shown first, followed by a little portion of the mast, and then the ship's body. Hmm. That must imply that the spacecraft was underneath the earth's "flat surface," or...

The globe that is the earth (Or having a burrito-like form. But for now, let's stick with spherical.) That's fascinating. That would indicate that if I go from one location on Earth to another and keep moving, I would ultimately return to the original location. This proposition is testable!

The Earth is not a perfect spherical, of course. Its core protrudes a little bit. But a sphere is a reasonably good scientific model for the Earth for all everyday practical purposes (with the exception of things like GPS and satellite communications, etc.).

Similar to this, other scientific models should be as straightforward as feasible in order to explain occurrences and offer some level of testable prediction potential.

Thanks,
Eddie

Answer:

The correct answer is B. 1-propanamine.

Explanation:

Amines can form hydrogen bonds with water molecules, which makes them soluble in water. The more hydrogen bonding sites an amine has, the more soluble it will be in water.

Out of the given options, 1-propanamine has only one carbon chain, which allows it to form more hydrogen bonds with water molecules compared to amine molecules with longer carbon chains. Also, it does not have any other functional groups that could interfere with hydrogen bonding. Therefore, 1-propanamine would be the most soluble in water.

Hope it helps!

Answer:

1.5 moles

Explanation:

O   mole weight = 15.999

O2 mole weight = 2 * 15.999 = 31.998 gm

48 / 31. 998  = ~ 1.5 moles

Answer:

opción c es la respuesta correcta espero que te ayude

Answer:

Strontium

Explanation:

In the periodic table, an element with two (2) valence electrons is found on group 2. Group 2 is a group of the periodic table that harbors element called ALKALINE EARTH METALS. As the name implies, they are metals that possess shiny and solid characteristics at room temperature.

Group 2 elements include the following: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), barium (Ba), and radium (Ra). Based on the descriptive information in this question, the element being described is a GROUP 2 element. Based on the elements in the option, only STRONTIUM (Sr) is a group 2 element.

The time it takes for the partial pressure of cyclopropane to decrease from 1.0 atmosphere to 0.125 atmosphere at 500°C can be estimated using the half-life of the isomerization reaction.

The half-life of a first-order reaction is defined as the time it takes for the concentration of the reactant to decrease by half. In this case, the half-life of the isomerization of cyclopropane to propylene is 19 minutes at 500°C. To find the time it takes for the partial pressure to decrease from 1.0 atmosphere to 0.125 atmosphere, we can use the relationship between concentration and time in a first-order reaction. The time can be calculated as the half-life multiplied by the logarithmic ratio of the initial concentration to the final concentration. This calculation would give an estimate of the time required for the partial pressure of cyclopropane to decrease from 1.0 atmosphere to 0.125 atmosphere.

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Answer:

(a) 20,000 seconds

(b) 333.33 repeating minutes

(c) 0.0006341958 years

We are given that,  

Volume of container A = V = 742 ml

Volume of container B = v = 189 ml

Pressure of container A = P = 2.20 atm

Pressure of container B = p = 4.30 atm

we are asked to determine the final pressure if the gases are allowed to mix together, let it say be P*

as the total volume after mixing of gases will be V +v = 931 ml

P*V* = PV + pv

P* = (PV + pv)/V*

P* = (2.20)(742) + (4.30)(189)}/ 931

P* = 2.62 atm

The resulting pressure is 2.62 atm.

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On the Modified Mercalli Scale, intensity XII is described as "Catastrophic" or "Total Destruction."

Intensity XII represents the highest level of damage and destruction caused by an earthquake. It indicates that the shaking is so severe that virtually all buildings and structures experience extensive damage or complete collapse.

Ground fissures, landslides, and other significant ground deformations may also occur. Utility systems, such as water, gas, and electrical networks, are likely to be extensively disrupted or completely destroyed. Additionally, there may be widespread panic, and the overall social and economic impact can be devastating.

The Modified Mercalli Scale is a subjective scale that assesses the effects of an earthquake based on observed damage and the impact on people, structures, and the environment. It provides a qualitative description of the level of shaking and its consequences rather than relying on instrumental measurements.

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To be an effective disinfectant, bleach needs to contain chlorine bleach as its active ingredient. Chlorine bleach works by breaking down the proteins, enzymes, and other molecules inside bacteria and viruses, ultimately killing them.

Other ingredients such as perm solution, ointments, or foaming agents are not necessary for bleach to effectively disinfect surfaces. It is important to use bleach according to the instructions on the label, as it can be dangerous if not used properly. Additionally, bleach should not be mixed with other cleaning products, as this can create toxic fumes.

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The balanced chemical reaction is given as follows: AgNO3 + NaCl ⟶ AgCl + NaNO3Here, it is required to determine the number of grams of AgCl that will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.

So, let's start by writing the balanced chemical reaction using the molar ratio between AgNO3 and AgCl:AgNO3 + NaCl ⟶ AgCl + NaNO3Molar mass of AgNO3 is 169.87 g/molNumber of moles of AgNO3 = Molarity × Volume = 0.500 mol/L × 0.0600 L= 0.03 molNumber of moles of AgCl = Number of moles of AgNO3 = 0.03 molMolar mass of AgCl is 143.32 g/mol

So, the mass of AgCl that will be formed is:Mass of AgCl = Number of moles of AgCl × Molar mass of AgCl= 0.03 mol × 143.32 g/mol= 4.3 gTherefore, 4.3 grams of AgCl will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.

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37.5 grams of AgCl will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.

The balanced chemical reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) is as follows:

AgNO3 + NaCl → AgCl + NaNO3

From the balanced equation, we can see that 1 mole of AgNO3 reacts with 1 mole of NaCl to produce 1 mole of AgCl. Therefore, the molar ratio between AgNO3 and AgCl is 1:1.

To find the number of moles of AgNO3 present in 60.0 mL of 0.500 M AgNO3 solution, we can use the formula:

moles of solute = concentration × volume

moles of AgNO3 = 0.500 M × 0.060 L

moles of AgNO3 = 0.030 moles

Since the molar ratio between AgNO3 and AgCl is 1:1, the number of moles of AgCl formed will also be 0.030 moles.

To calculate the mass of AgCl formed, we can use the molar mass of AgCl, which is 143.32 g/mol:

mass of AgCl = moles of AgCl × molar mass of AgCl

mass of AgCl = 0.030 moles × 143.32 g/mol

mass of AgCl = 4.2996 grams

Rounding to the appropriate number of significant figures, the mass of AgCl formed is 4.30 grams.

When 60.0 mL of 0.500 M AgNO3 is completely reacted, 37.5 grams of AgCl will be formed. This calculation is based on the balanced chemical equation and the given concentration and volume of the AgNO3 solution.

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Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.

b. false Water is a good conductor of electricity, and if it comes into contact with electrical components or wiring, it can create a risk of electrical shock. Therefore, team members should indeed be careful not to let water splash into the lemonade dispenser when the panels are off for cleaning.

This precaution is necessary to ensure the safety of the individuals handling the equipment. It is important to note that electrical shock can occur when there is a complete or partial path for electric current to flow through the body. Water can provide this path of conductivity and increase the likelihood of electrical shock. Therefore, team members should take appropriate precautions to prevent water from reaching the electrical components and ensure their own safety.

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Answer:

Yes

Explanation:

The rate at which a solute dissolves depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.

Brainliest?

The electron configuration for each of the following elements is provided below along with the symbol of the previous noble gas in brackets to represent the core electrons.1.

The electron configuration of an atom represents the distribution of electrons within the atom's atomic orbitals. Each electron shell is filled with electrons, beginning with the innermost shell, which is closest to the nucleus, and progressing outward. The symbol of the previous noble gas in brackets represents the core electrons.

The electron configuration of Ga, which has atomic number 31, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹ (Ar)The electron configuration of As, which has atomic number 33, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³ (Ar)The electron configuration of Rb, which has atomic number 37, is as follows: 1s²2s²2p⁶3s²3p⁶4s¹ (Kr)The electron configuration of Sn, which has atomic number 50, is as follows: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p² (Kr)

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Answer:

Water plays many important roles in the body including,flushing waste from the body,regulating body temperature,transportation of nutrients and is necessary for digestion.No wonder it is considered "essential"!.Plain water is the best choice for hydrating the body.

Explanation:

hope it helps you><

The atom with the smallest atomic radius in Group (i) is Rb (Rubidium), and in Group (ii), it is C (Carbon).

In Group (i), the atom with the smallest atomic radius is Rb (Rubidium).

As you move down a group, the atomic radius generally increases due to the addition of new electron shells.

In Group (ii), the atom with the smallest atomic radius is C (Carbon).

Moving from left to right within a group, the atomic radius tends to decrease due to the increased effective nuclear charge.

This means that the attraction between the electrons and the nucleus is stronger, leading to a smaller atomic radius.

So, Rb has the smallest atomic radius in Group (i), and C has the smallest atomic radius in Group (ii).

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Answer:

in copper from different plastics because appliances of codes to power day in wire copper the cover to use to plastic

ANSWER

Water molecule is a compound

EXPLANATION;

Water molecule is formed from the combination of oxygen and hydrogen atoms

Recall, that compound is the combination of two or more elements that are chemically combined together

Therefore, water molecule is a compound

Answer:

red blood cells and diffusion.

Explanation:

this process involves red blood cells and diffusion. Red Blood cells (RBCs) are a type of blood cell whose role is to transport oxygen from the lungs to the peripheral tissues of the body. Oxygen diffuses from the alveoli of the lungs in to the RBC's, where it binds to hemoglobin.

Diffusion is a very important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes. The lungs process millions of tiny air sacs that are called alveoli, each of which are in close contact with capillaries.

The difference between the molecular orbital (MO) theory and the valence bond (VB) theory is MO theory considers the formation of molecular orbitals by linear combination of atomic orbitals, while VB theory focuses on localized bonding due to the overlap of atomic orbitals, highlighting the geometrical arrangement of bonds in molecules

Molecular orbital theory is a method that describes the electronic structure of molecules by combining atomic orbitals to form molecular orbitals, which are delocalized over the entire molecule. This theory focuses on the formation of new orbitals from atomic orbitals and gives insight into the distribution of electron density, bond order, and magnetism of the molecule.

On the other hand, valence bond theory is based on the idea that atomic orbitals of individual atoms overlap to form bonds between the atoms, this theory emphasizes the localized nature of bonding, where electrons are shared between two specific atoms. It explains the bonding in terms of hybridization of atomic orbitals and their orientation in space.

In summary, MO theory considers the formation of molecular orbitals by linear combination of atomic orbitals, providing a more global view of bonding, while VB theory focuses on localized bonding due to the overlap of atomic orbitals, highlighting the geometrical arrangement of bonds in molecules. Both theories are essential for understanding the electronic structure and properties of molecules.

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Answer:

Explanation: