A person's heartbeat is 80 beats per minute. if his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? disregard leap years.

The items can be used to control the boiling when heating liquid is in a round bottom flask are boiling chips or stones,a stir bar and stir plate.

What is Boiling?

When a liquid is heated to its boiling point, which is the temperature at which the vapour pressure of the liquid equals the pressure placed on it by the surrounding atmosphere.

Because they provide even boiling and stop the solution from boiling over, boiling stones are very helpful in chemical labs. These chips are designed to be porous in order to permit the formation of solvent vapors in the air cavities.

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The sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

The food we eat chiefly consists of three nutrients namely carbohydrates, proteins and fats.

Proteins are the most abundant among the bio molecules present in the living organisms.

The word protein is derived from Greek word, “proteios” which means primary or of prime importance.

The proteins are the polymers of amino acids.

The structure of amino acid consists of a carbon atom surrounded by four functional groups i.e, Carboxyl(COOH) group, the Amino(NH2) group, hydrogen(H) and an alkyl group(R).

In a protein, amino acids are linked to each other by peptide bonds which are formed between the COOH group of one amino acid and the NH2 group of another amino acid, as shown in the adjoining image.

In primary structure, the amino acids are joined to each other in a linear manner without any branching, as shown in the given diagram.

Hence, the sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

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The difference between ideal gases and real gases are most pronounced under conditions of inter molecular forces.

Difference between ideal gases and real gases are discussed below :

Real gases differ from ideal gases thanks to the presence of inter molecular forces, which cause the molecules of a true gas to deviate from perfect random motion.

As a result, real gases deviate from the perfect gas law at high densities and low temperatures, where the results of inter molecular forces are more pronounced.

So, the difference between ideal gases and real gases are most pronounced under conditions of inter molecular forces.

What are inter molecular forces?

The attractive forces that exist between molecules are liable for many of the bulk physical properties exhibited by substances.An inter molecular force (IMF) (or secondary force) is that the force that mediates interaction between molecules, including the electromagnetic forces of attraction or repulsion which act between atoms and other sorts of neighboring particles, e.g. atoms or ions.

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The mass percent of gold in the piece is 79.08%

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

Thus,

Mass = density × volume

Mass = density × volume

Mass of gold = 19.3 × V

Mass of gold = 19.3V

Mass = density × volume

Mass of silver = 10.5 × (1.25 - V)

Mass of silver = 13.125 - 10.5V

Mass of piece = mass of gold + mass of silver

20.5 = 19.3V + 13.125 - 10.5V

Collect like terms

19.3V - 10.5V = 20.5 - 13.125

8.8V = 7.375

Divide both sides by 8.8

V = 7.375 / 8.8

Volume of gold = 0.84 cm³

Thus,

Mass of gold = 19.3V

Mass of gold = 19.3 × 0.84

Mass of gold = 16.212 g

Mass percent of gold = (mass of gold / mass of piece) × 100

Mass percent of gold = (16.212 / 20.5) × 100

Mass percent of gold = 79.08%

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Control Experiment: Those experiment where a control is taken as a reference to notice the changes in same reaction in the presence of external stress.

Need for a control in a experiment: The control is required to analyse the effect of stress applied to reaction. For e.g. If there are two compounds AB and XY & they are undergoing displacement reaction to form AX & BY, But all sudden another salt let MN is added into the reaction then there are possibilities of formation of different products depending upon the reactivity of initial reactants and external compound. The product can be same as our Control i.e. AB & XY if MN remains inert in the reaction. That's why control is important to compare the results.

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Molecular formula of a molecule is C₂H₂.

Empirical formula gives the proportion of the elements present in a compound.

The proportion od carbon and hydrogen is 1 : 1.

n(C) : n(Cl) = 1 : 1

n(C) = n(H) = n; amount of substance of carbon and hydrogen is the same in a molecule

M(molecule) = 26 g/mol; molar mass of a molecule

M(C) = 12 g/mol; molar mass of carbon

M(H) = 1 g/mol; molar mass of hydrogen

M(molecule) = n × M(C) + n × M(H)

M(molecule) = n × 12 g/mol + n × 1 g/mol

26 g/mol = n × 13 g/mol

n = n(C) = n(H) = 2

There are 2 atoms of carbon and two atoms of hydrogen in a molecule, so molecular formula is C₂H₂.

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A suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.

A hypothesis is an educated guess or a tentative conjecture explaining an observation or scientific problem.

According to this question, a chemist is designing an experiment to investigate the effect of temperature on the rate of a chemical change.

This suggests that a suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Also, the Independent variable is the temperature because it is the variable that is changed.

Dependent variable is the rate of chemical change because it is the measured variable.

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Answer:

A suitable hypothesis for the above experiment conducted by the chemist is as follows: IF the temperature is increased, THEN the rate of chemical change will also increase.

Independent variable - Temperature

Dependent variable - Rate of chemical change

controlled variable - pressure or concentration of the reactants

Answer:

0.036g

Explanation:

I've learned about sig figs

The formula weight of ammonium sulfate ((NH₄)₂SO₄), rounded to the nearest integer, is 132 amu

Ammonium sulfate ((NH₄)₂SO₄) formula are as follow:

((NH₄)₂SO₄)

Now,28+8+32+64  = 132gm/mol

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The classification is:

Organic substances known as amino acids have both amino and carboxylic acid functional groups. Only 22 of the hundreds of amino acids found in nature are alpha amino acids, which are by far the most common and make up proteins. Only 22 alpha amino acids are found in the genetic code. Alpha-, beta-, gamma-, or delta-amino acids can be categorized according to where the main structural functional groups are located; further classifications relate to polarity, ionization, and the kind of side chain group (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). Amino acid residues are the second-largest component of human muscles and other tissues, behind water, in the form of proteins.

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Answer:

magnesium

Explanation:

Answer:

A liquid has a defined volume, but can change its shape. Water is an example of a liquid. A gas lacks either a defined shape or volume. Water vapor and air are examples of gas.

...

Examples of Solids

Brick.Coin.Iron bar.Banana.Rock.Sand.Glass (no, it does not flow)Aluminum foil.

To prepare the HCl solution if 1% m/v HCL was available, take 2.5ml of the stock solution and makeup to mark with 7.5 ml of water.

HCl is hydrochloric acid, and it is a highly reactive and strong acid.

Given, the dilution formula

C₁V₁= C₂V₂

C₁ = initial concentration

V₁ = initial volume

C₂ = Final concentration

V₂ = final volume

The values are

C₁ = 1% m/v

V₁ = ?

C₂ = 0.25% m/v

V₂ =  10 ml

V₁  = C₂V₂/C₁

V₁  = 0.25% m/v ×  10 ml /1% m/v

V₁  = 2.5 ml

Thus, the amount of HCl is 2.5ml of the stock solution. The amount of water is 7.5 ml of water.

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The average kinetic energy of an object's particles increases with increasing temperature. The object's thermal energy grows as the average kinetic energy of its particles rises. As a result, an object's thermal energy rises as its temperature does.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility. Temperature and thermal energy are strongly connected. Both reflect the motional kinetic energy of matter particles. Thermal energy is the total kinetic energy of matter particles, whereas temperature is the average kinetic energy of matter particles.

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Approximately, 21 kJ was released from the combustion of the 1-g sample.

Because heat is a type of energy, the SI unit for heat is also joules (J), which is defined as the quantity of energy required to increase the temperature of a given mass by one degree. This is significant because heat is a form of energy. Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred. The joule is the S.I. unit for heat.

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The final temperature of the gas is 137°C at which it must be heated to occupy the volume of 557 ml.

Given,

V₁= 371ml

V₂ = 557 ml

T₁ = 0°C or 273 okay

We ought to locate the very last temperature of the fuel that must be heated.

as the cylinder is transferring freely, the pressure is equal to the outside pressure, i.e., 1 atm, beneath all situations.

consequently, by using the use of Charles regulation, we get

V₁ / T₁ = V₂ / T₂

where V₁ and V₂ are preliminary and very last volumes

and T₁ and T₂ are preliminary and very last temperatures (in Kelvin).

accordingly, the very last temperature is

T₂ = V₂ × T₁ / V₁

Or, T₂ = 557 x (zero+273) / 371

Or, T₂ = 410 okay

Or, T₂ = 137°C

consequently the final temperature is 137°C.

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius)

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Answer:soluble

Explanation: bc its less then NaOh

Answer:

The pH scale ranges from 0-14.

Explanation:

Zero is the most acidic measurement while six would be the least acidic of the acids, seven is a pure substance, neither acidic nor basic, eight is the least basic measurement while 14 is the most basic of the bases.

The diameter water pipe is required to handle 0.075 m3/s and a 500 kpa pressure drop is 149.4mm.

The force applied perpendicularly to an object's surface, denoted by the symbol p or P, is stated to be applied per unit area that the force is claimed to be dispersed over. The pressure that is supposed to be related to the ambient pressure is called the gauge pressure, also known as gauge pressure.

[tex]Q=0.075m^3/s[/tex]

ΔP=500kPa

L=175m

e=2.5mm

Properties of water :

[tex]\rho=1000kg/m^3[/tex]

[tex]\mu=0.001N-s/m^2[/tex]

Reynold's number Re=ρVD/μ

where V= Q/A=Q/(π/4)[tex]D^2[/tex]=4Q/π[tex]D^2[/tex]

Re=(ρ(4Q/π[tex]D^2[/tex])D)/μ

=4ρQ/πDμ=4(1000kg/[tex]m^2[/tex])(0.075[tex]m^3[/tex]/s)/πD(0.001N-s/[tex]m^2[/tex])

Re=(95492.966/D)

Darcy friction formula

f=1.325/[ln(e/3.70+5.74/[tex]Re^{0.9}[/tex])[tex]]^2[/tex]

f=1.325/[ln(e/3.70+5.74/(95492.966/D[tex])^{0.9}[/tex])[tex]]^2[/tex]____(1)

from, [tex]h_L[/tex]=8fL[tex]Q^2[/tex]/g[tex]D^2[/tex][tex]\pi^2[/tex]

Δρ/ρμ=8FL[tex]Q^2[/tex]/[tex]\pi^2[/tex]g[tex]D^5[/tex]

500×[tex]10^3[/tex]Pa/(1000kg/[tex]m^3[/tex])=8f(175m)(0.075[tex]m^3[/tex]/s[tex])^2[/tex]/[tex]\pi^2[/tex][tex]D^5[/tex]

f/[tex]D^5[/tex]=626.642

f=626.642[tex]D^5[/tex]_____(2)

solving equation 1 and 2

we get f=0.0467 and D=0.1494m

D=149.4mm

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If we assume the density of water is 1.00 g/mL, the mass of water is 250 g

To find mass here density is given so we use density formula density=mass/volume

The volume of water is given but not the mass. Hence volume is converted into mass by using the density of water, which 1.0 g /ml. Therefore, Mass of water = 250 ml x 1.0 g/ml = 250 g

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Water molecules are held together by hydrogen bonds because they are polar covalent bond molecules.

The smallest particle of a substance has all the physical and chemical properties of that substance. A molecule is made up of one or more atoms. If they contain multiple atoms, those atoms can be the same (the oxygen molecule has two oxygen atoms) or different (the water molecule has two hydrogen atoms and one oxygen atom). Biomolecules such as proteins and DNA are made up of thousands of atoms.

A simple molecule contains only a few atoms joined by covalent bonds. An example is carbon dioxide (CO 2 ), whose molecule contains a carbon atom bonded to two oxygen atoms.

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Engineers in Russia invented a new way to create colorful art with constructive laser art.

Modern industrial life and urban space were intended to be reflected in constructivist art. It produces art using industrial manufacturing techniques and inexpensive materials.

The idea behind constructivism was to replace conventional art by emphasizing engineering rather than painting. Russia started a colorful way to create new art.

Thus, Russian engineers developed a fresh method for producing vivid artwork using constructive laser art.

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The term molecular mass can only be applied to a(n) covalent compound since compounds do not consist of molecules. the correct term that is applicable to all types of compounds is mass. covalent

The molecular components of a compound offer the smallest integer ratio of the atoms withinside the compound. Different compounds may have identical molecular components. The term "molecular weight" isn't suitable while speaking about ionic compounds that aren't made from personal molecules

An atom and its ion have identical atomic mass due to the fact the mass of the electron that turns an atom into an ion is negligible. The term "molecular weight" won't be suitable due to the fact the components of an ionic compound now no longer describe the composition of an unmarried molecule.

Something like desk salt (NaCl) is a compound due to the fact it's miles made from a couple of elements (sodium and chlorine), however, the bonds that keep NaCl collectively are ionic bonds, so in a molecule There is none. Sodium chloride may be stated to be an ionic compound if desired.

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Banded iron formations are made of minerals like iron-rich silicates and iron-rich carbonates.

Banded iron is the sedimentary rocks that are formed by the iron-rich contents and iron-rich carbonates and silicates. These minerals are hematite and magnetite.

The organisms that release oxygen are converted into iron oxides underwater, and they form sedimentary rocks like banded iron. The oxides are composed on the ocean floor, and they turn into rocks.

Thus, the correct minerals for banded iron formation are iron-rich silicates and iron-rich carbonates.

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Matter is anything that has mass and occupies space.

Characteristics:

1. Volume

2. Density

3. Compressibility

The experiment is performed to determine the solution and the observations. Variables are the data that are present in the experiment. Temperature is the independent and solubility is the dependent variable.

Independent variables are defined by the variables that vary in the experiment and are the temperature in this case as the dissolution capability of the sugar is studied in the experiment.

The solubility of the sugar is a dependent variable as it varies based on the temperature of the beaker which affects the solubility factor. It gets altered by the temperature.

Therefore, the temperature is the independent variable.

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Aerobic refers to exercise that primarily uses the oxygen-dependent energy system, oxidative phosphorylation.

Aerobic Respiration is the method of cellular respiration that takes place in the presence of oxygen gasoline to produce electricity from food. This type of breathing is frequent in most of the plant life and animals, birds, humans, and different mammals. In this process, water and carbon dioxide are produced as quit products.

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Charge can be transferred from one object to another in three way conduction, polarization, and friction

Whenever electrons are transferred between objects, neutral matter becomes charged and three ways this can occur are referred to as conduction, polarization, and friction conduction means when there is direct contact between materials that differ in their ability to give up or accept electrons when two different materials are rubbed together, there is a transfer of electrons from one material to the other material and this causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer)

Here given object is water + balloon; balloon + wall; tape then you rub a balloon against your clothes and it sticks to the wall, you are adding a surplus of electrons (negative charges) to the surface of the balloon the wall is now more positively charged than the balloon and we tested the conductivity of deionized water positively charged

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Answer:

a diagram of hydrogen has 1 proton with charge (+1) inside it's nucleus and no neutrons

also it has 1 electron with charge (-1) outside the nucleus in orbit

Explanation:

Composition in mole % is 0.091%

Given:

Copper alloy has 9.3 wt % Al2O3 = 9.3 wt/wt%

So the mol % of Al2O3 can be find by

      Mole% = w/w% / Mwt

      Mwt og Al2o3 = 101.968

      Mole% = w/w% / Mwt

                  = 9.3 / 101.96

      Mole% = 0.091%

The term "mole percent" (mol%) refers to the mole fraction in a different format. By multiplying the mole fraction by 100, the mole percent of the specified component can be calculated. Mole fraction multiplied by 100 equals Mole percent.

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