The molecular weight of carbon dioxide, CO2, is 44.00 amu, and the molecular weight of nitrous dioxide, NO2, is 46.01
amu, so NO2 diffuses
CO2

Answer:

Explanation:

The noticeable exception in the trends of ionization energy of Mg and Al can best be explained using the arrangements of the electrons in the sub-levels.

Mg with 12 electrons has an electronic configuration of 2,8,2 = 1S²2S²2P⁶3S²

Al with 13 electrons has an electronic configuration of 2,8,3 = 1S²2S²2P⁶3S²3P¹

Lets take a little peep into what ionization energy is.

Ionization energy is a measure of the readiness of an atom to lose electron. The amount of energy needed to remove an electron is called the ionization energy. In this regard, the first ionization energy is the energy need to remove the valence or the most loosely held electron in an atom.

The magnitude of the ionization energy depends on a number of factors. The most important to our discuss here are:

The arrangement of electrons in Mg confers a special stability on it because of the filled sublevel.

The maximum number of electrons in each sub-levels are:

s-orbital = 2 electrons

p- orbital = 6 electrons

d - orbital = 10 electrons

f - orbital = 14 electrons

In Mg, 1S²2S²2P⁶3S² , the outermost s-sublevel have 2 electrons and s-orbital can accomodate a maximum of 2 electrons in this subshell. This makes the arrangement stable.

For Al, 1S²2S²2P⁶3S²3P¹,  the outermost p-subshell houses just one electron but it can accommodate a maximum of 6 electrons. This arrangement is unstable.

Due to this electron arrangements, Mg would have a very stable configuration and a greater first ionization energy compared to Al.

Answer:

IRON NAIL

Explanation:

Answer:

B.) Iron nail

Explanation:

I took this quiz, k12 8th grade

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Best of luck to all future comers...<3

Answer:

D-B-C-A

Explanation:

D: Atoms are hard, indivisible spheres — John Dalton: Atomic theory (1803)

B: Atoms have small, negatively charged particles — J. J. Thomson: cathode rays (1897)

C. The center of an atom is a small, dense nucleus — Lord Rutherford: gold foil experiment (1909)

A: Electrons have wavelike properties — Niels Bohr: Bohr model (1913)  

The development of the idea of atoms passed through various stages.

The history of the development of the atomic theory passed through several stages. Each stage in the development of atomic theory was backed by empirical evidence. The theory was jettisoned only when more compelling evidence suggests that the current model is inaccurate.

The order of development of atomic theory is shown below;

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Answer:

The same amount of energy as

Explanation:

The complete combustion of 1 mole of glucose in a living cell releases the same amount of energy as the complete combustion of 1 mole of glucose by fire.

The same amount of glucose contains a fixed amount of energy

Answer: The same amount of energy

Explanation: Glucose the primary source of energy for all the living organism. In order to sustain a life, organisms need to use energy for all the vital processes of the body.

Combustion of glucose inside the body or combustion of glucose outside in the environment with the help of fire will generate the same amount of energy.

Answer:

it is a base because they accept H+ ions

Explanation:

The correct answer is a base because they accept H+ ions.

          [tex]OH^{-} + H^{+}[/tex]⇄ [tex]H_{2}O[/tex]

Acetic acid provides a proton and functions as an acid in this process, whereas the water molecule (base) takes a proton.

[tex]CH_{3}CO_{2}H + H_{2}O[/tex] ⇄[tex]CH_{3}CO_{2} ^{-} + H_{3}O^{+}[/tex]

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Answer:

C

Explanation:

Answer: C. A thoroughly tested and widely accepted explanation. Explanation: A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted.

Answer:

0.0074 °C.

Explanation:

ΔTb = i.Kb.m,

where, ΔTb is the elevation in boiling water.

i is van 't Hoff factor, The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

i for BaCl₂ = 3/1 = 3.

Kb is the molal elevation constant of water (Kb = 0.512 °C/m).

m is the molality of the solution.

m = (no. of moles of BaCl₂)/(mass of water (kg)) = (mass/molar mass of BaCl₂)/(mass of water (kg)) = (1.5 g/208.23 g/mol)/(1.5 kg) = 0.0048 m.

∴ ΔTb = i.Kb.m = (3)(0.512 °C/m)(0.0048 m) = 0.0074 °C.

Insulin has a complex structure that involves primary, secondary, tertiary, and quaternary levels, with its three-dimensional tertiary structure being essential for its biological function.

The structure of insulin can be described in terms of primary, secondary, tertiary, and quaternary levels. The primary structure refers to its amino acid sequence. Insulin exhibits a secondary structure through regions of alpha-helices and beta-sheets. The tertiary structure of insulin is its unique three-dimensional shape resulting from the folding of the protein, and is essential for its biological function. Finally, insulin may also exhibit a quaternary structure when two insulin monomers (A and B chains) come together, stabilized by disulfide bonds and other interactions, as seen in its storage form within the body.

Answer:

Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.

Explanation:

edge 2023

C=n/V

V=n/C=0.34/0.0606=5.61L

Answer:

chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds

Explanation:

Answer:

D the liquids are allowed to seperate into layers

D. The liquids are allowed to separate into layers.

Density refers to the weight of the substance. The substance which is light in weight remains at the top of the substance which is heavy or with more density. This principle is used for separation of liquid based on their density.

In the process, the liquid sample composed of various liquids of varying density is poured in a separating funnel. The setup is left as it is without disturbance for considerable period of time. Based upon the weight of the liquid it forms a layer in which liquid with high density settles at the bottom, whereas liquid with less density remain at the top.

Answer:

The correct choices are:

Explanation:

The theoretical yield is the maximum amount of product that could be obtained by the chemical reaction, from a given amount  of reactants. You calculate the theoretical yield using the stoichiometry coefficients of the balanced chemical equation.

The percent yield is the ratio of the actual yield (the actual amount obtained) of a product to the theoretical yield for the same product, expressed as a percentage (i.e. multiplied by 100).

As the actual yield decrease (the numerator of the ratio), the percent yield decrease.

To increase the percent yield it is important:

Using accurate measurements: if you do not add the correct amounts of each reactant, then the product obtained will not be what you can predict from the theoretical calculations and  you will be wasteing one or other reactant, without reaching the maximum yield possible.

Using pure chemicals: if the chemicals are not pure, the amount of actual reactants will be lower than they should be, leading to a lower actual yield.

Performing the reaction under the most ideal conditions: the actual rate of reactions depend on the conditions: temperature and pressure are the most commons. Since, temperature and pressure may change that rate of reactions, you should find and use the most ideal conditions to get the greatest actual yield.

Adding water, can just dilute the reactants and would decrease the rate of reaction, which would not be helpful to increase the yield.

Answer is using accurate measurements

using pure chemicals

performing the reaction under the most ideal conditions

Answer:

Its lysogenic cycle if a virus integrates its DNA into host cell.

Explanation:

Bacteriophages are the viruses which infect bacteria. Viruses are obligatory parasites which need host for their survival. Viruses which infect bacteria can either take up the lytic cycle or lysogenic cycle. Lytic as the name suggests involves the lysis of host bacterial cell after the replication of virus. Once the bacterial cell is lysed and the virions are released they invade another host bacterial cell. In the other case i.e. lysogenic cycle, the bacteriophage after infecting the host bacterial cell integrates its genome into the host cell genome. At this stage we call it as prophage. The viral genome gets replicated with the host cell machinery but does not produces the viral protein and remains dormant with in the host cell. The integrated genome of virus is passed on to the daughter cells as the cell division occurs. Once the bacterial host cell condition becomes progressively worse, the reproductive cycle of virus begins resulting in the lysis of host cell.

Answer:

C. mobile electrons in the copper can shift without disrupting the solid

Explanation:

Most of the properties of metals results from the metallic bonds between atoms of the metals. The bond forms from the attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by the atoms losing their outermost shell electrons due to their low ionizatin energy.

This is not so in ionic solids.

Answer:

2AgCl == 2Ag + Cl2

Explanation:

when a white colour salt silver chloride is placed in a sunlight in a watch glass decomposition by sunlight takes place and this type of reaction is takes place when a single compound breaks down into two or more reactants name the energy is supplied in the form of Sunlight the following is the chemical equation for for this reaction

2AgCl == 2Ag + Cl2

Answer:

When white silver chloride is exposed to sunlight, thermal energy excites the silver atoms which appears in flakes and it is black in colour which overtime spreads over to the silver chloride which is white in colour and turns it grey.

This reactions with sunlight dissociate the silver atoms into silver metals and chlorine molecule and it's called PHOTOCHEMICAL REACTION, since its requires energy in form of light to be initiated. Silver chloride are kept in amber bottles away from sunlight so as to prevent this decomposition.

Sunlight

2AgCl —————》 2Ag + Cl2

Answer:

Explanation:

1) Percent formula: % = (mass of solue / mass of solution)×100

Substitue the values in the percent formula:

Mass of solute = 2.26 g ← answer

2) Mass of solution = mass of solute + mass of solvent

Answer:

[tex]\boxed{\text{Mass of solute = 2.26 g; mass of solution = 47.1 g}}[/tex]

Explanation:

[tex]\text{Mass percent} = \dfrac{\text{mass of solute }}{\text{mass of solute + mass of solvent}} \times 100 \, \%[/tex]

1. Calculate the mass of solute

Let x = mass of solute. Then

[tex]\begin{array}{rcl}4.8 & = & \dfrac{x}{x + 44.8} \times 100\\\\4.8(x + 44.8) & = & 100x\\4.8x + 215 & = & 100x\\215 & = & 95.2x\\\\x & = & \dfrac{215}{95.2}\\\\x & = & \textbf{2.26 g}\\\end{array}[/tex]

2. Calculate the mass of solution

Mass of solution = mass of solute + mass of  solvent = (2.26 + 44.8) g

= 47.1 g

[tex]\boxed{\textbf{Mass of solute = 2.26 g; mass of solution = 47.1 g}}[/tex]

To find the volume of hydrochloric acid (HCI) required to react completely with aluminum hydroxide (AI(OH)3), use the balanced chemical equation and stoichiometry. The equation is AI(OH)3 (s) + 3HCl (aq) -> AICl3 (aq) + 3H2O (l). Convert the mass of AI(OH)3 to moles, then use the mole ratio to find the volume of HCl.

To find the volume of hydrochloric acid (HCI) required to react completely with aluminum hydroxide (AI(OH)3), we need to use the balanced chemical equation for the reaction and the stoichiometry of the reaction.

The balanced chemical equation is: AI(OH)3 (s) + 3HCl (aq) -> AICl3 (aq) + 3H2O (l)

From the equation, we can see that 1 mole of AI(OH)3 reacts with 3 moles of HCl. Given that the concentration of HCl is 0.500 mol/L, we can convert the mass of AI(OH)3 to moles, then use the mole ratio to find the volume of HCl:

Plug in the values above to calculate the volume of HCl required.

If the price of gasoline is 3.85 dollars per US gallon, the price per litre will be 0.844 dollars. Because 1 gallon = 4.56 litres.

Volume is used for the measurement of capacity. Thus the unit for measuring volume is basically a unit for measuring the capacity or the extent of space in an object. A unit is used to indicate the volume of goods or liquids. It should be kept in mind that mass and volume are two different physical quantities.

The SI Unit for volume is measured in cubic metres or m^3. Here the three-dimensional use of the base unit of length is used which is metres.

1 m^3 = 1 m • 1 m • 1 m.

The metric unit for volume is the litre and is widely used. Also, there are standard metric prefixes which are used for highlighting large or small volume measures. These are millilitre (ml)  which is also used as a unit for measuring volume.

Few other units are used to depict the volume. These are the British system of measurements like barrels, drams, gills, bushels, and pecks. In the British system, more standard units used are the cubic inch or cubic foot and the gallon.

Therefore, If the price of gasoline is 3.85 dollars per US gallon, the price per litre will be 0.844 dollars. Because 1 gallon = 4.56 litres.

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Final answer:

To convert the price of gasoline from $3.85 per US gallon to the cost per liter, divide $3.85 by 3.78541, which results in approximately $1.017 per liter.

Explanation:

If the price of gasoline is $3.85 per US gallon, we need to convert this to the cost per liter. Since 1 US gallon is equivalent to 3.78541 liters, we divide $3.85 by 3.78541 to get the price per liter.

The calculation is as follows:
$3.85 per gallon ÷ 3.78541 liters per gallon = approximately $1.017 per liter.

Therefore, the cost of gasoline is roughly $1.017 per liter.

Answer:

1- Equilibrium determines the rate of reactants and products at the same time.

General expression for equilibrium:

                                     Reactants⇌ Products

2- At equilibrium, all the reactants and products are constant.

3- At equilibrium forward and reverse reaction does not stop, in fact, it continues at all times.

4- When the concentrations of reactants and products become equal dynamic equilibrium is obtained.

For example:

         A + B ⇌ C + D

In this reaction, if the concentration of reactant  A has increased the equilibrium will shift to the right to form more products.

If the concentration of reactant A has decreased the equilibrium will shift to the left in the backward direction to form reactants.

Answer:At equilibrium, the forward and backward reaction rate is the same.

Explanation:The equilibrium counteracts any change in the condition of the reactant or product. The le'chatalier principle highlights three main factors that affect the state of equilibrium. The three factors are: amount of moles, concentration and pressure.If the amount of reactant is increased, the equilibrium will shift to the right in order to create a balance between the forward and backward reaction and vice versa.

Answer:

10

Explanation:

The atomic mass = 20

The atomic number = 10

The number of neutrons = mass - number = 20 - 10 = 10

This formula is always true. There are no exceptions.

Answer:

53 cm³

Explanation:

When the student used dilute sulfuric acid, the reaction was complete after 60 s, because no more hydrogen was formed in the next 10 s.

The reaction would go faster if the student used a more concentrated acid, but 53 cm³ of hydrogen is the most that would form.

Answer:

Hydrogen ion concentration is 2.773E-4Mole per DM3

Hydroxide ion concentration is 4.093E-11

It is an acid

Explanation:

PH(H3O)=-LogH3O

PH=3.557

H3O=antilog of -3.557

antilog of -3.557=antilog (0.443 -4)

antilog0.443 ×antilog -4=2.773E-4mole per DM3.

(H3O)(OH)=10^-14

H30=2.773×10^-14

OH= 1.00E-14/2.773E-4

=4.093E-11

it is an acid since the concentration of hydrogen ion is more than the hydroxide ion

Answer:

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Lower the value of pH more acidic will the solution.

Mathematically written as:

[tex]pH=-\log[H^+][/tex]

The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Lower the value of pOH more alkaline will the solution.

Mathematically written as:

[tex]pOH=-\log[OH^-][/tex]

The sum of ph and pOH is equal to 14.

pH + pOH = 14

We have:

Solution with pOH = 3.557

The pH of the solution = 14 - pOH = 10.443

[tex]pH=-\log[H^+][/tex]

[tex]10.443=-\log[H^+][/tex]

[tex][H^+]=3.606\times 10^{-11} M[/tex]

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

[tex]pOH=-\log[OH^-][/tex]

[tex]3.557=-\log[OH^-][/tex]

[tex][OH^-]=0.0002773 M[/tex]

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Answer:

10

Explanation:

You can tell with the name of the molecule. Just remember that the prefix will tell you how many.

di = 2

deca = 10

The name of the molecule is

disulfur decaflouride

This means that there are 2 sulfur atoms and 10 flourine atoms.

To eliminate the other choices:

penta = 5

pentadeca = 15

Answer:

Humidity is the answer.

I would go with option D.integumentary system

The mass of the copper is approximately 1085.55 g.

To solve this problem, we can use the principle of heat transfer, which states that the heat lost by the metal (copper) is equal to the heat gained by the water.

The heat gained or lost by a substance can be calculated using the formula:

[tex]\[ Q = mc\Delta T \][/tex]

Where:

- Q is the heat gained or lost (in joules)

- m is the mass of the substance (in grams)

- c is the specific heat capacity of the substance (in J/g°C)

- [tex]\( \Delta T \)[/tex] is the change in temperature (in °C)

For copper, the specific heat capacity is approximately [tex]\( 0.385 \, J/g ^\circ C} \)[/tex], and for water, it's 4.18 J/g°C.

Let's denote:

- [tex]\( m_c \)[/tex] as the mass of the copper

- [tex]\( m_w \)[/tex] as the mass of the water

- [tex]\( \Delta T_c \)[/tex] as the change in temperature of the copper

- [tex]\( \Delta T_w \)[/tex] as the change in temperature of the water

Given:

- [tex]\( \Delta T_c = \Delta T_w = 5.5 \, ^\circ C} \)[/tex]

- [tex]\( c_c = 0.385 \, J/g^\circ C} \)[/tex] (specific heat capacity of copper)

- [tex]\( c_w = 4.18 \, J/g^\circ C} \)[/tex] (specific heat capacity of water)

- [tex]\( T_{c,i} = 75.6 \, ^\circ C} \)[/tex] (initial temperature of copper)

- [tex]\( T_{w,i} = 19.1 \, ^\circ C} \)[/tex] (initial temperature of water)

We can set up the equation:

[tex]\[ m_c \cdot c_c \cdot \Delta T_c = m_w \cdot c_w \cdot \Delta T_w \][/tex]

Solving for [tex]\( m_c \)[/tex]:

[tex]\[ m_c = \frac{m_w \cdot c_w \cdot \Delta T_w}{c_c \cdot \Delta T_c} \][/tex]

Substituting the given values:

[tex]\[ m_c = \frac{100.0 \, \text{g} \cdot 4.18 \, {J/g ^\circ C} \cdot 5.5 \, {^\circ C}}{0.385 \, {J/g^\circ C} \cdot 5.5 \, {^\circ C}} \][/tex]

[tex]\[ m_c = \frac{2299 \, \text{J}}{2.1175 \, \text{J}} \][/tex]

[tex]\[ m_c \approx 1085.55 \, \text{g} \][/tex]

So, the mass of the copper is approximately 1085.55 g.

A metal cooking pot is an alloy.

Hence, Option (C) is correct answer.

An alloy is a mixture of metals and other elements. It is a substance which has metallic properties.

Examples: Steel is an alloy of iron and carbon. Bronze is an alloy of copper and tin. Brass is an alloy of copper.

A metal cooking pot are made from stainless steel, cast iron, copper or glass.

Thus, from the above conclusion we can say that A metal cooking pot is an alloy.

Hence, Option (C) is correct answer.

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Answer:

Eukaryotic cells

Explanation:

Prokaryotic cells do NOT have nuclei.

I hope this helps, and as always, I am joyous to assist anyone at any time.