Why do metals have delocalised electrons?

A is automatically out! since you can't put liquid on an electronic balance.

D.is also out! the most you can do with a meter stick is see how high the water is.

C. IS wrong A measuring cup is closer but not what were looking for.

the answer is B.Graduated Cylinder!

Answer:

It is the graduated cylinder

Explanation:

There are at least 60 elements in our bodies.

Other elements may be present, but in such small quantities that we cannot detect them with current technologies.

The six most abundant elements (by mass) in our bodies are:

Oxygen           65    %

Carbon            18    %

Hydrogen       10    %

Nitrogen          3.2 %

Calcium           1.4 %

Phosphorus    1.1  %

TOTAL =      99     %

m₁ = mass of water = 75 g

T₁ = initial temperature of water = 23.1 °C

c₁ = specific heat of water = 4.186 J/g°C

m₂ = mass of limestone = 62.6 g

T₂ = initial temperature of limestone = ?

c₂ = specific heat of limestone = 0.921 J/g°C

T = equilibrium temperature = 51.9 °C

using conservation of heat

Heat lost by limestone = heat gained by water

m₂c₂(T₂ - T) = m₁c₁(T - T₁)

inserting the values

(62.6) (0.921) (T₂ - 51.9) = (75) (4.186) (51.9 - 23.1)

T₂ = 208.73 °C

in three significant  figures

T₂ = 209 °C

To find the specific heat capacity of the metal, we can use the formula: q = mcΔT, where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Substituting the given values and solving, we find that the specific heat capacity of the metal is approximately 0.252 J/g °C.

To find the specific heat capacity of the metal, we can use the formula: q = mcΔT, where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. In this case, we know the initial and final temperatures of the metal, as well as the mass of the water, so we can plug these values into the equation. Rearranging the equation to solve for c, we have: c = q / (mΔT). Substituting the values and solving, we find that the specific heat capacity of the metal is approximately 0.252 J/g °C.

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A option is correct answer   .

Answer:

A. three dimensions

Explanation:

Crystal lattice have a three dimensional array of repeating units. For example, in the NaCl crystal the repeating units are the Na⁺ and Cl⁻ ions. The Na⁺ and Cl⁻ ions are arranged alternately along the x, y and z axis. The smallest repeating unit of a cell is called unit cell. Crystal lattice have a definite geometry which is because of this rigid array of unit cells.

1. 5,400 inches to miles: 0.085227 miles.

2. 16 weeks to seconds: 8,966,400 seconds.

3. 54 yards to mm: 49,381.76 mm.

4. 36 cm/sec to mph: 0.080502 mph.

using the dimensional analysis-

1. 5,400 inches to miles:

5,400 inches * (1 foot / 12 inches) * (1 mile / 5,280 feet) = 0.085227 miles.

2. 16 weeks to seconds:

16 weeks * 7 days/week * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 8,966,400 seconds.

3. 54 yards to mm:

54 yards * 3 feet/yard * 30.48 cm/foot * 10 mm/cm = 49,381.76 mm.

4. 36 cm/sec to mph:

36 cm/sec * (1 foot / 30.48 cm) * (1 mile / 5,280 feet) * (3600 sec / 1 hour) = 0.080502 mph.

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The complete question is -Dimensional Analysis Worksheet Set up and solve the following using dimensional analysis.

1 mile = 5,280 ft 1 inch = 2.54 cm

3 feet = 1 yard 454 g = 1lb

946 ml 1 qt 4 qt=1 gal

1) 5,400 inches to miles

2) 16 weeks to seconds

3) 54 yards to mm

4) 36 cm/sec to mph

The size difference between the beams indicates the weights and reading scales that each beam measures.

The triple beam balance is a precision instrument for measuring mass. It gets its name from its three beams, with the middle beam being the largest, the far beam being medium in size, and the front beam being the smallest.

It is made up of three beams, each with a single sliding weight whose size corresponds to the gradations of the notched scale on the beam.

It gets its name from its three beams, with the middle beam being the largest, the far beam being medium in size, and the front beam being the smallest.

The size variation among the beams implies the weights and reading scales that each beam measures.

Thus, these are the differences between the three beams on a triple beam balance.

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A molecule is the smallest particle of a covalent compound that has the properties of that compound.

A molecule is the smallest particle of a covalent compound that still has the properties of the compound.

Answer : The chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.

Explanation :

The rules for naming the chemical name of the compound :

In the given compound, the nickel is the cation and first element in the formula and the oxidation state of nickel is, (+3). The second element is oxygen which is named as oxide.

Thus, the chemical name of the compound [tex]Ni_2O_3[/tex] is, nickel(III)oxide.

The chemical name of the compound represented by the formula Ni₂O₃ is nickel (III) oxide.

Ionic compounds are formed when ions with opposing negative and positive charges form ionic bonds and form compounds, which are compounds made of ions.

Ionic compounds are named by stating the cation first, followed by the anion. When a neutral atom loses one or more electrons, it acquires a positive charge and is called a cation and when an atom gains one or more electrons, it becomes an anion and acquires a negative charge.

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Answer is: 8568.71 of baking soda.

Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.

V(H₂SO₄) = 17 L; volume of the sulfuric acid.

c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.

n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).

n(H₂SO₄) = 17 L · 3 mol/L.

n(H₂SO₄) = 51 mol; amount of sulfuric acid.

From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.

n(NaHCO₃) = 2 · 51 mol.

n(NaHCO₃) = 102 mol, amount of baking soda.

m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).

m(NaHCO₃) = 102 mol · 84.007 g/mol.

m(NaHCO₃) = 8568.714 g; mass of baking soda.

um I believe its heat transfer, or something called ligma.

Given data:

 x ∝ 1/y

Equation related to question:

 x = k/y ,                                                y = K / x

x=1 y=______ , K = 18

Solution:

Equation : y = K / x

Putting values:

y= 18 / 1 = 18       ,                               Hence  Y = 18

x=2 y=______ , K =18

Equation : y = K /x

Putting values:

y = 18/2 = 9         ,                              Hence y = 9

x=3 y=_______, K = 18

Equation : y = K /x

Putting values:

y = 18 / 3 = 54  ,                                  Hence y = 6

x=6 y=_______, K = 18

Equation : y = K /x

Putting values:

y = 18 / 6 = 108                                    Hence y = 3

x=9 y=______, K = 18

Equation : y = K /x

Putting values:

y = 18 /9 = 2                                       Hence y = 2

x=18 y=_______ , k = 18

Equation : y = K /x

Putting values:

y = 18 / 18 = 324                                  Hence y = 1

Here are the answers:

A virus is considered living in some ways, but in the end, they cannot be considered a living organism because they cannot reproduce by themselves.

B is correct, a virus is not classified as living

The entity that contains genetic material but are not classified as living are viruses. Thus, option B is correct.

Genetic material is described as the hereditary substance. It is carried in the cell, and contains the specified information to the organism. The material can be of two types, Deoxyribose nucleic acid (DNA), and Ribonucleic acid (RNA).

The characteristics that defines the entity to be living is the presence of the nucleic acid and the ability to reproduce. Viruses are the organisms that can reproduce inside the host cell only.

Thus, with the inability to reproduce outside the host cell, viruses are considered as non-living in spite they contain genetic material. Hence, option B is correct.

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Answer: [tex]C_9H_8O_4[/tex]

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula is [tex]C_9H_8O_4[/tex]

The empirical weight of [tex]C_9H_8O_4[/tex] = 9(12)+8(1)+4(16)= 180g.

The molecular weight = 180 g/mole

Now we have to calculate the molecular formula:

[tex]n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{180}{180}=1[/tex]

The molecular formula will be=[tex]1\times C_9H_8O_4=C_9H_8O_4[/tex]

Thus molecular formula of aspirin will be [tex]C_9H_8O_4[/tex]

The molecular formula of aspirin is C9H8O4.

In the molecular formula of aspirin, there are 9 carbon atoms, 8 hydrogen atoms and 4 oxygen atoms.

The empirical formula C9H8O4 gives the ratio of the elements in the compound, but the molecular formula provides the actual number of atoms. Therefore, the molecular formula of aspirin is C9H8O4.

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Hey there!:

Given the reaction:

CaCO3(s) + H2SO4(aq) -------> CaSO4(s) + CO2(g) + H2O(l)

volume in liters( H2SO4 )  = 100 mL / 1000 => 0.1 L

Moles of H2SO4:

Molarity * Volume ( L )

0.100 * 0.1 => 0.01 moles of H2O4

1 mole H2SO4 reacted with -------------- 1 mole  CaCO3

0.01 moles H2SO4 reacted with ------- 0.01 moles CaCO3

Molar mass CaCO3 = 100.0869 g/mol

Mass of CaCO3 :

Moles of CaCO3 * Molar mass CaCO3

0.01 * 100.0869 => 1.000869 g of CaCO3

Therefore:

% mass =  ( Mass of CaCO3 /  mass of sample ) * 100

% mass =  ( 1.000869 / 5.00 ) * 100

% mass = 0.2001738 * 100

% mass = 20.01%

Hope that helps!

Cake batter is not a pure substance but rather a mixture because it is made of different ingredients like flour, sugar, and eggs that retain their original properties even when mixed together.

Cake batter is not a pure substance, but rather a mixture. In Chemistry, a pure substance is an elemental or compound matter with constant composition and properties throughout. This means it's made up of a single type of particle, like gold (element) or water (compound), which can't be separated into other kinds of matter by physical means.

On the other hand, a mixture consists of two or more different substances which are mixed but not combined chemically.

In cake batter, one can find flour, sugar, eggs, and other ingredients that retain their original properties even when mixed together to make the batter. Therefore, we can classify cake batter as a mixture.

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Final answer:

Dan most likely described a liquid state of matter because the particles are in constant contact, can move around each other, and don't bounce off, unlike in a gas. This movement is due to the relatively strong intermolecular forces that are characteristic of liquids.

Explanation:

Based on Dan's description of particles that 'move around each other but do not bounce off,' he is likely describing the liquid state of matter. In a liquid, the particles are close enough to experience strong intermolecular interactions, which usually keep the particles contained within the liquid boundary. However, unlike solids, the particles within a liquid are not fixed in position and have the ability to move around and flow, thus allowing them to take the shape of their container while maintaining a definite volume. Liquids are characterized by the ability of particles to slide past one another, which differentiates them from the fixed positions of particles in a solid and the free, independent movement of particles in a gas.

Answer: Energy locked in the nucleus of an atom

Explanation:

Nuclear energy is an energy which binds the constituents of nucleus of an atom together.

There are two types of nuclear reaction from which nuclear energy is produced:

Magnesium AR: 150 pm

Chlorine AR: 100 pm

When a substance undergoes a chemical change, it results in different physical properties .

it turns into diffrent pyshical properties

Explanation:

a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas. These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell. When a volume of fluid is heated, it expands and becomes less dense and thus more buoyant than the surrounding fluid. The colder, denser part of the fluid descends to settle below the warmer, less-dense fluid, and this causes the warmer fluid to rise. Such movement is called convection, and the moving body of liquid is referred to as a convection cell.

Final answer:

Air density impacts movement in convection cells, with warm, less dense air rising and cool, denser air sinking, creating a cycle that drives convection currents and influences weather patterns.

Explanation:

The density of air affects its movement in a convection cell because warm air that is less dense rises, while cooler, denser air sinks. This movement of air due to differences in density is what drives convection currents. As a fluid, such as air, is heated, it expands, becoming less dense than the surrounding fluid. This decrease in density results in buoyancy, causing the air to rise. At higher elevations or as the air mass expands and comes into contact with cooler environments, it loses heat, becomes denser and hence sinks back down, creating a convection cell, as seen in phenomena such as Hadley cells and local weather patterns like thunderstorms. In essence, the difference in density affected by the temperature is responsible for the movement of air within these cells, transferring energy from one place to another.

Answer: Polar bonds

Carbon (C) has 4 electrons in the valence electrons whereas chlorine has 7. Each carbon and chlorine (Cl) will form a polar covalent bond.

Non polar bonds, develop where two atoms share a pair of electrons with each other. Hence they are known as Non-polar covalent bonds and they have equal electronegativities

In polar bonds, the electrons are shared unequally between the atoms which as a result increases the electronegativity difference which makes it ionic.

The bond is polar bond.

So the bond is C—Cl is polar. Carbon is partial positive while chlorine is partial negative.

Metals have the property of being shiny. Tellurium is a metal and belongs to the metallic region of the periodic table. Solid nonmetals are brittle, and most nonmetals are poor conductors of electricity.

The property that most metals have in common is that they are shiny. This is due to the way metals reflect light. Metals have free electrons that are able to move around, creating a smooth and shiny surface.

Tellurium is a silvery-white, brittle element that belongs to the metals region of the periodic table.

Most of the elements located directly to the right of the metalloids in the periodic table are nonmetals.

The property that most solid nonmetals have in common is that they are brittle. Nonmetals tend to be brittle because they lack the metallic bonding that gives metals their strength and ductility.

A property that most nonmetals have in common is that they are poor conductors of electricity. Nonmetals do not have free electrons like metals, so they are not able to conduct electricity as well.

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A fusion reaction takes place between carbon and another element. Neutrons are released, and a different element is formed. The different element is Lighter than helium.

A fusion reaction takes place between carbon and another element neutrons are released and a different element is formed.

The different element is heavier than helium.

In a fusion reaction, two light nuclei merge to form a single heavier nucleus.

Nuclear fusion produces elements that are heavier than helium.

A fusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed.

The reason behind that helium is the lightest element and if carbon fused with another element, it would be heavier.

Hence,  a fusion reaction takes place between carbon and another element neutrons are released and a different element is formed.

The different element is heavier than helium.

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The density of the mixture will be 1.57 g/cm³.

Step 1. Calculate the mass of the butter.

[tex]\text{Mass} = \text{1.00 cm}^{3 } \times \frac{\text{0.680 g} }{\text{1 cm}^{3 }} = \text{0.860 g}\\[/tex]

Step 2. Calculate the mass of the sand.

[tex]\text{Mass} = \text{1.00 cm}^{3 } \times \frac{\text{2.28 g} }{\text{1 cm}^{3 }} = \text{2.28 g}\\[/tex]

Step 3. Calculate the density of the mixture.

Total mass = 0.860 g + 2.28 g = 3.14 g.

Total volume = 1 cm³ + 1 cm³ = 2 cm³

[tex]\text{Density} = \frac{\text{mass}}{\text{volume}} = \frac{\text{3.14 g} }{\text{2 cm}^{3 }} = \textbf{1.57 g/cm}{^{3}\\[/tex]

First structure is  CH₃-CH₃. It is an alkane with two carbon atoms hence it is called ethane.

Second structure is  CH₃-CH₂-CH₂-CH₃. It is an alkane with four carbon atoms hence it is called butane.

Third structure is CH₄. It is an alkane with one carbon atom hence it is called methane.

Fourth structure is CH₃-CH₂-CH₃. It is an alkane with three carbon atoms hence it is called propane.

calcium,phosphorus,potassium,and sulfer

Answer:

Carbon and oxegyn

Explanation:

The next step is C

It isn't A because it is not an emergency

B is for spills I believe

D  is wrong because using her hands could be dangerous as she may cut herself.

The observation that would indicate that a material is a pure substance is:

C. It cannot be physically broken down into different types of atoms.

A pure substance consists of only one type of atom or molecule, meaning it cannot be broken down into simpler substances by physical means. Option C describes this characteristic, indicating that the material cannot be physically separated into different types of atoms, thus suggesting it is a pure substance. Options A, B, and D describe properties that may or may not be indicative of a pure substance, but they do not directly address the fundamental composition of the material as being made up of only one type of atom or molecule.

The probable question may be:

Which of the following observations would indicate that a material is a pure substance?

A. It does not dissolve in water.

B. It changes color after heating.

C. It cannot be physically broken down into different types of atoms.

D. It can be physically broken down into different types of molecules.