Which property of an ancient rock allowed scientists to determine that Earth was at least 4. 3 billion years old?

The number that matches the power of ten is given below:

10⁵  = 100000

10⁻³ = 0.001

The value of numbers expressed in the power of ten is that number multiplied or divided by the given power or exponent of 10.

Writing numbers in powers of 10 is described as writing in standard form.

For a number written in powers of 10, if the power of ten is positive, the number is multiplied by 10 the number of times found in the power of 10. However, if the power of ten is negative, the number is divided by 10 the number of times found in the power of 10.

For example:

10⁵ = 1 * 10 * 10 * 10 * 10 * 10 * 10 = 100000

10⁻³ = 1 ÷ 10 ÷10 ÷ 10 = 0.001

Learn more about standard form at: brainly.com/question/19169731

#SPJ1

Explanation:

When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside

Answer:

The pressure of the liquid (blood) forces the liquid to move into the syringe when its plunger is withdrawn. When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

For the sequential deprotonations of a polyprotic acid, the equilibrium constants will typically decrease with each successive ionization.

For explaining above statement let's take an example of polyprotic acid like phosphoric acid.

In the phospheric acid \(H_{3} PO_{4}\), after deprotonation of one hydrogen results as \(H_{2} PO_{4}^{-}\) and equilibrium constant as \(K_{1}\) . \(H_{2} PO_{4}^{-}\)  donate one hydrogen results as \(H_{} PO_{4}^{-2}\) and equilibrium constant as \(K_{2}\) . Similarly,  \(H_{} PO_{4}^{-2}\)  donate one hydrogen results as \(PO_{4}^{-3}\) and equilibrium constant as \(K_{3}\) . The removing of hygen ion from nuetral molecule is easier than removal of hydrogen ion from ionic species So, the value of \(K_{1}\) is greater than  \(K_{2}\) and value of  \(K_{2}\)  is greater than \(K_{3}\).

So, the equilibrium constants of polyprotic acid will typically decrease with each successive ionization.

Learn about deprotonations

brainly.com/question/5628309

#SPJ4

the complete statement in liquid spill cleanup is 1- Surround the area with barriers, then cover the spill. 2- Scoop up the material and place it in a container.

steps for liquid spill cleanup are:

Identify and assess the type of liquid spilled.

Put on appropriate personal protective equipment (PPE)

Alert others in the area and evacuate if necessary.

Surround the area with barriers, such as caution tape or cones, to prevent anyone from entering the area.

Use absorbent materials, such as sand, clay, or kitty litter, to cover the spill and contain it.

Scoop up the material and place it in a container for proper disposal.

Clean the area with a neutralizing agent if necessary.

Dispose of the waste in accordance with local and federal regulations.

Check for any remaining traces of the spill and clean if necessary.

Document the incident and make sure it is properly reported if required by regulations.

Learn more about liquid spill cleanup here:

https://brainly.com/question/30246211

#SPJ4

The equilibrium constant of the reaction from the calculation that has been done is 0.154

The concentrations (or partial pressures) of reactants and products in chemical equilibrium for a specific chemical reaction are related by the equilibrium constant (K), a mathematical equation. It quantifies the degree to which an equilibrium has been reached in a reaction.

We have the equation of the reaction as;

A(g) + B(g) ⇔C(g)

Thus;

Keq = 45.83/11.23 * 26.50

Keq = 0.154

Learn more about equilibrium constant:https://brainly.com/question/28559466

#SPJ1

To calculate the pH of the reaction  buffer obtained by adding 4.0g NaOH to 1.00L of 0.3M CH3COOH (pKa=4.76), we use the Henderson-Hasselbalch equation.

First, we need to calculate the concentration of CH3COOH before the addition of NaOH. The number of moles of CH3COOH in 1.00L of 0.3M CH3COOH is:moles CH3COOH = Molarity x Volume= 0.3M x 1.00L= 0.3 molesWe can use the balanced chemical equation for the reaction between NaOH and CH3COOH to find the number of moles of CH3COOH and CH3COO- after the addition of NaOH:CH3COOH + NaOH → CH3COO- + H2ONumber of moles of NaOH = mass / molar mass= 4.0g / 40 g/mol= 0.1 molesNaOH is a strong base, so it reacts completely with CH3COOH to form CH3COO- and water:NaOH + CH3COOH → CH3COO- + H2ONumber of moles of CH3COOH remaining = initial moles of CH3COOH - moles of NaOH= 0.3 - 0.1= 0.2 molesNumber of moles of CH3COO- formed = moles of NaOH= 0.1 moles.

Now we can calculate the concentration of CH3COOH and CH3COO-:[CH3COOH] = moles / volume= 0.2 moles / 1.00L= 0.2M[CH3COO-] = moles / volume= 0.1 moles / 1.00L= 0.1MNext, we can use the Henderson-Hasselbalch equation to find the pH of the buffer:pH = pKa + log [A-] / [HA]pKa = 4.76[CH3COOH] = 0.2M[CH3COO-] = 0.1MpH = 4.76 + log (0.1 / 0.2)= 4.76 - 0.301= 4.459.
To know more about reaction  visit:

https://brainly.com/question/30464598

#SPJ11

Moles of gas = 0.123

In general, the gas equation can be written  

\(\large {\boxed {\bold {PV = nRT}}}\)

where  

P = pressure, atm , N/m²

V = volume, liter  

n = number of moles  

R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)

T = temperature, Kelvin  

Volume(V) =2.5 L

Pressure(P) = 1.2 atm

Temperature(T) = 25 + 273=298 K

\(\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1.2\times 2.5}{0.082\times 298}\\\\n=0.123~moles\)

Answer:

4.0 kg

Explanation:

M = W/g = 39.2/9.8 = 4.0 kg

sorry if its wrong-

Answer: The density of the rock is 3.03

Explanation:

Density formula:

P = mass/volume

= 170/56

= 3.03

Note: cannot measure density, so there is no sign beside it.

The new volume of the balloon is approximately 40,417 mL.

First we need to use the gas law equation:

PV = nRT

Where

Assuming the number of moles of helium in the balloon remains constant, we can set up the following equation:

P1V1/T1 = P2V2/T2

Where

Simplifying the equation:

V2 = V1 × T2 / T1

Plugging in the values:

V2 = 35,000 mL × 338.15 K / 293.15 K

V2 = 40,417 mL (rounded to the nearest mL)

Therefore, the new volume of the balloon is approximately 40,417 mL.

Learn more about gas law here : brainly.com/question/27870704

#SPJ1

Answer:

Explanation:ddxc

An ionic compound that is neither an acid nor a base is classified as a salt. Salts are formed when an acid reacts with a base, resulting in the neutralization of their respective acidic and basic properties.

In this reaction, the acid donates a proton (H+) to the base, forming water, while the remaining ions from the acid and base combine to form the salt. Salts are composed of positively charged cations and negatively charged anions. The cation is derived from a base, while the anion is derived from an acid. However, the resulting salt does not exhibit the characteristic properties of either an acid or a base. It does not donate or accept protons in solution, making it neutral in nature. Salts have a wide range of applications, including as flavor enhancers, preservatives, and components in chemical reactions and industrial processes. They can also be found naturally in minerals and are essential for various biological processes in living organisms. In summary, an ionic compound that is neither an acid nor a base is classified as a salt. It is formed through the neutralization reaction between an acid and a base and does not exhibit acidic or basic properties in solution.

Learn more about ionic compound here:

https://brainly.com/question/3222171

#SPJ11

In the given query, none of the options presented are the same size as one mole of gas at STP. At STP, one mole of petrol has a volume of 22.4 L, which is larger than a marble but smaller than a car or an elephant.

At STP (standard temperature and pressure), the temperature is 273 K and the pressure is 1 atm. One mole of an ideal gas at STP occupies a volume of 22.4 L.

To determine which of the items is closest in size to one mole of gas at STP, we need to use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of gas.

A) A car is much larger than one mole of gas at STP, so it is not the correct option.

B) An elephant is also much larger than one mole of gas at STP, so it is not the correct choice.

C) A microwave is much smaller than one mole of gas at STP, so it is not the correct option.

D) A marble is much smaller than one mole of gas at STP, so it is not the correct choice.

Therefore, none of the options provided is closest in size to one mole of gas at STP. One mole of gas at STP occupies a volume of 22.4 L, which is much larger than a marble and much smaller than a car or an elephant.

Learn more about STP here:

https://brainly.com/question/24050436

#SPJ12

The effective nuclear charge of sulfur is 14, and the effective nuclear charge of chlorine is 15.

Effective nuclear charge (Zeff) is a measure of the positive charge felt by the valence electrons. The effective nuclear charge (Zeff) of s and Cl is calculated using the simple formula zeff = z – s, where z is the atomic number and s is the screening constant. Screening constant (s) is the number of electrons between the nucleus and the valence electrons that shield the valence electrons from the full nuclear charge of the nucleus.

For sulfur (S), the atomic number is 16, and there are two electrons in the innermost shell and four electrons in the second shell. So, the number of valence electrons in sulfur is 6. The screening constant of S is 2. Effective nuclear charge of sulfur = z – s= 16 - 2= 14

For chlorine (Cl), the atomic number is 17, and there are two electrons in the innermost shell and eight electrons in the second shell and seven valence electrons. Therefore, the screening constant of Cl is 2. Effective nuclear charge of chlorine = z – s= 17 - 2= 15

Learn more about effective nuclear charge: https://brainly.com/question/30459988

#SPJ11

Answer:

D

Explanation:

Recall that boiling points increase with stronger intermolecular forces.

Because halogens are diatomic molecules, they are nonpolar and lack the ability to form hydrogen bonds. Therefore, the only IMF they possess are London dispersion forces.

Recall that London dispersion forces increase with increasing polarizability, which is higher in larger molecules due to the increased number of electrons.

The largest halogen is iodine (I₂). Therefore, it will have the strongest IMF and hence the highest boiling point.

Boyle's Law, which states that at constant temperature, a gas's pressure and volume are inversely related, can be used to address this issue.

Boyle's Law says that P1V1 = P2V2.

Where: P1 = The gas's initial pressure (in torr)

V1 is the container's initial volume (in millilitres).

P2 stands for the gas's post-volume change pressure (unknown).

V2 is the revised volume of the container (in millilitres).

Let's solve for P2 by entering the provided values into the equation:

P₁ = 757.2 torr

V2 = 132.5 mL V1 = 81.4 mL

P2 = ambiguous

P₁V₁ = P₂V₂

P2 equals 757.2 torr x 81.4 mL x 132.5 mL.

P2 times 132.5 mL = 61702.08 torr * mL

61702.08 torr = P₂ * 132.5

P2 = 132.5 mL / 61702.08 torr

P₂ ≈ 465.69 torr

as a result, the gas's pressure

Learn more about pressure at :

https://brainly.com/question/30673967

#SPJ1

Answer:

0.0311 moles

Explanation:

given in pic.

Have a good day!

These facts serve as the best examples of how the tissues, organs, and organ systems in all living things collaborate to maintain homeostasis because contractile vacuoles are organelles that regulate water balance

Homeostasis is the term used to describe the body's need to achieve and preserve a specific state of equilibrium. A physiologist by the name of Walter Cannon first used the term in 1926. The tendency of the body to keep internal conditions, like blood sugar and temperature, at essentially constant and stable levels is known as homeostasis.

Between cells and an entire organ, there is a biological organisational level called tissue. An assembly of comparable cells and their extracellular matrix from the same origin that work together to perform a particular function is referred to as a tissue.

Learn more about homeostasis here

https://brainly.com/question/12221049

#SPJ4

Reaction 1 has a predicted negative change in standard entropy of reaction.
Reaction 2 has a predicted positive change in standard entropy of reaction.
Reactions 3 and 4 have predicted negative changes in standard entropy of reaction.

To categorize each reaction according to its predicted change in standard entropy of reaction, we need to consider the number of moles of gas on the reactant and product side of each equation.

1. N2(g) + O2(g) → 2NO(g)
There are 3 moles of gas on the reactant side and 2 moles of gas on the product side, so there is a decrease in the number of moles of gas. This means that the predicted change in standard entropy of reaction is negative.

2. 2C(s) + O2(g) → 2CO(g)
There is 1 mole of gas on the reactant side and 2 moles of gas on the product side, so there is an increase in the number of moles of gas. This means that the predicted change in standard entropy of reaction is positive.

3. N2(g) + 2O2(g) → N2O4(g)
There are 3 moles of gas on the reactant side and 2 moles of gas on the product side, so there is a decrease in the number of moles of gas. This means that the predicted change in standard entropy of reaction is negative.

4. 2H2(g) + O2(g) → 2H2O(g)
There are 3 moles of gas on the reactant side and 2 moles of gas on the product side, so there is a decrease in the number of moles of gas. This means that the predicted change in standard entropy of reaction is negative.

Learn More about entropy here :-

https://brainly.com/question/13135498

#SPJ11

There are approximately 300 trillion (300,000,000,000,000) red blood cells in an adult.

To calculate the number of red blood cells in an adult, we can use the ratio of the sample size to the adult's blood volume.

Given that the sample size is 0.1 mm^3 and contains approximately 6000 red blood cells, we can determine the number of red blood cells per mm^3 by dividing the number of cells by the sample size:

6000 cells / 0.1 mm^3 = 60,000 cells/mm^3

Next, we need to convert the adult's blood volume from liters to mm^3. Since 1 L is equal to 1,000,000 mm^3, the adult's blood volume is:

5.0 L * 1,000,000 mm^3/L = 5,000,000 mm^3

Finally, we can calculate the total number of red blood cells in an adult by multiplying the red blood cell concentration (60,000 cells/mm^3) by the adult's blood volume (5,000,000 mm^3):

60,000 cells/mm^3 * 5,000,000 mm^3 = 300,000,000,000,000 cells

To know more about red blood cells, please click on:

https://brainly.com/question/12265786

#SPJ11

Answer:

ionic

Explanation:

Iron(II) chloride, also known as ferrous chloride, is the chemical compound of formula FeCl2. It is a paramagnetic solid with a high melting point. The compound is white, but typical samples are often off-white

In order for an element to transform into a new element, the particles which must be released is the protons.

This is referred to as subatomic particle which is present in the nucleus and is positively charged. The proton and the electron must be equal in a neutral atom.

The proton is also equal to the atomic number which is why it is the particle which can be added removed to change the element. It is because a change in atomic number will automatically mean a change in the element which therefore makes it the correct choice.

Read more about Proton here https://brainly.com/question/1805828

#SPJ1

In order for an element to transform into a new element, the particles which must be released to change the number of protons is: beta particles.

A beta particle can be defined as an isotope which typically undergoes radioactive decay through the emission of a radiation with a negative one (-1) charge. This ultimately implies that, an atom of neutron becomes a proton and an electron (₀e⁻¹), and an atom of proton also becomes a neutron and a positron (⁰⁻e₁⁺) during beta decay.

Based on scientific information and records from radioactivity, we can reasonably infer and logically deduce that an atom of proton becomes a neutron and a positron during a beta decay as shown by this chemical reaction:

³H₁  ----->   ³He₂ + ⁰e₋₁ + ⁰v₀

Read more on beta particle here: https://brainly.com/question/12448836

#SPJ1

Mole present in 85 grams of calcium is 2.12 moles

It is given that

given mass of calcium = 85 grams

molar mass of calcium = 40 grams

We have to find the moles

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12, its symbol is “mol”

moles = given mass/molar mass

moles = 85 gram/40 gram

moles = 2.12

Hence, moles in 85 grams of calcium is 2.12 moles

Learn more about Moles here:

https://brainly.com/question/15356425

#SPJ1

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

Learn more about NaCl

https://brainly.com/question/32275922?

#SPJ11

Considering the definition of calorimetry, if 200.0 g of ice absorb 1255.0 J of heat, the temperature change is 2.988°C.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). So, the amount of heat that a body receives or transmits is determined by the following expression:

Q = c×m×ΔT

Where:

In this case:

Replacing in the definition of calorimetry:

1255 J = 2.1 J/gC× 200 g× ΔT

Solving:

1255 J ÷(2.1 J/gC× 200 g)= ΔT

2.988 °C= ΔT

Finally, the temperature change is 2.988°C.

Learn more about calorimetry:

brainly.com/question/15332904

#SPJ1

Answer:

the sun beams down on the pool and heats it up top to bottom the deeper the colder