The world map below shows the locations of San Francisco and Dublin which of these statements best explains why Dublin is not cooler than San Francisco although it is over 1600 km further north?

Answer:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Explanation:

Conductivity is an example of a physical property. Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical composition.

Conductivity specifically refers to a material's ability to conduct electricity or heat. Materials with high electrical conductivity allow electricity to flow easily through them, while materials with high thermal conductivity conduct heat efficiently.

Examples of conductive materials include metals like copper and aluminium, which are widely used in electrical wiring and heat transfer applications due to their excellent conductivity properties.

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Answer:

Clavulanic acid has two (2) chiral centers.

Explanation:

A chiral center is a center (usually carbon) with four different substituents.

The structure of clavulanic acid is shown in the attachment below.

Consider the labeled diagram in the attachment,

Carbon A is not a chiral carbon because it has two hydrogen atoms attached to it

Carbon B is not a chiral carbon because it has only three substituents

Carbon C is a chiral carbon because it has four different substituents

Carbon D is a chiral carbon because it has four different substituents

Carbon E is not a chiral carbon because it has only three atoms directly attached to it

Carbon F is not a chiral carbon because it has only three atoms directly attached to it

Carbon G is not a chiral carbon because it has two hydrogen atoms attached to it

Carbon H is not a chiral carbon because it has only three substituents

Then, only carbons C and D are chiral carbons.

Hence, clavulanic acid have two (2) chiral centers.

Answer:

dinosaur footprint

Explanation:

dinosaur footprint because the deffinition of trace fossil is a fossil of a foot print

Answer: Dinosaur footprint should be correct!

Explanation: As in the name, trace footprints are practically just traces, so a Dino print is a perfect example! The dinosaur left a trace, leaving evidence about it, for science to study:) please let me know if this helps! :)

The molar extinction coefficient is specific to the substance being measured and the wavelength of light used. Accurate and precise values for absorbance, concentration, and path length are necessary for an accurate calculation.

To calculate the molar extinction coefficient (ε) using wavelength (λ) and absorbance (A):

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Answer:

The balanced chemical equation for the reaction of sulfuric acid (H2SO4) with calcium phosphate (Ca3(PO4)2) to produce phosphoric acid (H3PO4) and calcium sulfate (CaSO4) is:

3H2SO4 + Ca3(PO4)2 → 2H3PO4 + 3CaSO4

From the balanced equation, we can see that for every 3 moles of sulfuric acid that react, 2 moles of phosphoric acid are produced.

So, if 10 moles of sulfuric acid react, we can calculate the amount of phosphoric acid produced as follows:

10 moles H2SO4 × (2 moles H3PO4/3 moles H2SO4) = 6.67 moles H3PO4

Therefore, 10 moles of sulfuric acid reacting would produce 6.67 moles of phosphoric acid.

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The formula represents dissociated free ions as dissolved ionic compounds. An illustration is AgNO3(aq) + NaCl(aq) = AgCl(s) + NaNO3 (aq).

We only need to take out the spectator ions in order to formulate the net ionic equation. We are left with the net ionic equation after removing the spectator ions! The net ionic equation can be obtained by repeating this procedure for any reaction.

When a reaction reaches equilibrium, or when the concentrations of the reactants and products stop changing, it is said to be "finished." The answer becomes more straightforward if the equilibrium constant is large: the reaction is complete when the concentration of a reactant reaches zero.

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The statement that best describes the activation energy on the graph below is the vertical difference between 1 and 2 (option B).

Activation energy is the energy required to initiate a reaction. For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy.

According to this question, a reaction proceeds from 1 to 3. The activation energy needed for the reaction to be initiated is the vertical line that extends to the peak of 2.

Therefore, it can be said that the statement that best describes the activation energy on the graph below is the vertical difference between 1 and 2.

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Answer:

A

Explanation:

In genetic terms, a dominant trait is one that is phenotypically expressed in heterozygotes

Answer:

Specific heat capacity is a measure of how much energy is needed to raise the temperature of a material and is defined as follows:

Answer:

That would be 90 grams

Explanation:

This should be right but please, please, please correct me if I'm worng because I dont  want anyone to fail because of me. Have a great day luv <3  

The answer is option B , 90 grams of potassium chloride(KCl) is needed to saturate exactly 300 grams of water at 10°C

The measure of the degree to which a substance gets dissolved in a solvent to become a solution.

The solubility of KCl in water at 10°C is 31.2gm/100gm of water .

So in 300 gm of water 3 * 31.2 gm = 93.6 gm

Using Significant Figures we can select option B  i.e. 90 gm.

Hence Option B , 90 grams of potassium chloride is needed to saturate exactly 300 grams of water at 10°C

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Answer:

the answer above is correct

Explanation:

Yes, chemical processes like electrolysis or thermal decomposition can break down compounds into simpler forms.

When an electric current is passed through ionic substances, the process known as electrolysis breaks them down into simpler forms. The movement of ions or electrons is electricity. Ions must be present in the compound for electrolysis to work.

Positively charged ions travel to the negative electrode while negatively charged ions travel to the positive electrode during electrolysis. After that, ions with positive charges get electrons, while ions with negative charges lose them. At the electrodes, both dissociation products are collected.

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Answer:

Hello, Otaku Kun Here! >:3

Explanation:

Electromagnetic waves? This is also called light!

hope this helps!

from: Otaku Kun! ^^

This is an exercise in the general or combined gas law.

To start solving this exercise, we obtain the data:

We use the following formula:

Where

We clear the general formula for the final pressure.

\(\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{P_{1}V_{1}T_{2} }{V_{2}T_{1}} \ \to \ Clear \ formula \end{gathered}$}\)

We substitute our data into the formula to solve:

\(\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{(1.3 \ atm)(13\not{l})(288\not{k} )}{(27 \not{l})(298 \not{K})} \end{gathered}$}\)

\(\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{4867.2}{8046} \ atm \end{gathered}$}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf P_{2}=0.604 \ atm \end{gathered}$}}\)

If I measure the pressure after the change by 1.3 atm, the original pressure of the gas will be 0.604 atm.

Answer:

-security hardware

- artificial intelligence

wifi, internet, phones, voice assistants, drones.

Answer: 5 electrons

Explanation:

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The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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The correct rate law of the reaction from the experimental data is k[NO]^2 [O2]. Option D

The rate of reaction is usually expressed in terms of the amount of reactant consumed or product formed per unit time, and is typically measured in units of moles per liter per second (mol/L/s) or similar units.

We have that;

For NO;

3.4 * 10^-5/8.4 * 10^-6 = 2 * 10^-4/ 2 * 10^-4

4 = 2^n

n = 2

For O2;

8.4 * 10^-6/2.8 * 10^-6 = 3 * 10^-4/ 1 * 10^-4

3 = 3^n

n = 1

Thus the rate law of the reaction is;

Rate = k[NO]^2 [O2]

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Answer:

If capital R is round, than the RR and Rr will mean round, and the two rr's are wrinkled. that means the answer to both is 50%

Explanation:

hope that helps

Answer:

The rearrangement of particles in a physical change.

Explanation:

When things are liquid the particles tend to be spread out because they aren't tightly compacted as they would be with a solid. So when liquid gold is changing from a liquid to a solid the properties are changing and the particles in the gold are getting closer together.

Answer:

D is correct answer

Explanation:

Answer: water

For many centuries, it was considered that there were only three states of matter: solid, liquid and gas (the three that are present and stable in our world). And water is the substance that best represents them, because it is the only one that exists naturally in the three states.

Explanation: Matter can exist in one of three main states: solid, liquid, or gas.

Solid matter is composed of tightly packed particles. ...

Liquid matter is made of more loosely packed particles. ...

Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.

Answer:

Water is the only common substance that is naturally found as a solid, liquid or gas. Solids, liquids and gases are known as states of matter.

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Ignore this part unless you want to understand out of your syllabus:

However, if you take into account the fifth state of matter, Bose-Einstein Condensate, which has been recently discovered, there is no substance as such.

Answer: When a solute is added to water, the vapor pressure will decrease and the boiling point will increase.

Explanation:

The volume of gas when the pressure is 45 psi is 2,833.33mL.

The volume of a substance can be calculated using Boyle's law equation as follows:

P₁V₁ = P₂V₂

Where;

According to this question, a tank of carbondioxide has a pressure of 850 psi and a volume of 150 mL. The volume can be calculated as follows:

850 × 150 = 45 × V

V = 127,500 ÷ 45

V = 2,833.33mL

Therefore, 2,833.33mL is the volume of the gas.

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The balanced equation for the given reaction is:

4 Si4C3 + 15 O2 → 8 Si2O3 + 3 C

What is Balanced Chemical Equation?

The coefficients in a balanced chemical equation represent the stoichiometric relationship between the reactants and products. They show the relative amounts of each substance that are involved in the reaction. In the given chemical equation, Si4C3 + O2 -> Si2O3 + C, the coefficients can be determined by balancing the number of atoms of each element on both sides of the equation.

Starting with Si, there are 4 Si atoms on the left and 2 Si atoms on the right, so a coefficient of 2 is needed in front of Si2O3 to balance the number of Si atoms.

Moving on to C, there are 3 C atoms on the left and 1 C atom on the right, so a coefficient of 3 is needed in front of C to balance the number of C atoms.

Finally, for O, there are 2x3=6 O atoms on the left and 2x2=4 O atoms on the right, so a coefficient of 3 is needed in front of O2 to balance the number of O atoms.

The balanced equation is thus: Si4C3 + 3O2 -> 2Si2O3 + 3C, with coefficients of 1, 3, 2, and 3 for Si4C3, O2, Si2O3, and C, respectively.

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Answer:

A. 9.83g

B. 13.06

Explanation:

A) To calculate the mass of BaSO4 formed, you need to first write the balanced equation for the reaction:

Ba(OH)2 + H2SO4 -> BaSO4 + 2H2O

Then, you need to find the limiting reactant, which is the one that runs out first and determines how much product is formed. You can do this by converting the volumes and concentrations of the solutions to moles and comparing them with the stoichiometric coefficients.

50 mL of 1.00 M Ba(OH)2 = 0.050 L x 1.00 mol/L = 0.050 mol Ba(OH)2 88.7 mL of 0.475 M H2SO4 = 0.0887 L x 0.475 mol/L = 0.0421 mol H2SO4

According to the equation, 1 mol of Ba(OH)2 reacts with 1 mol of H2SO4, so Ba(OH)2 is in excess and H2SO4 is the limiting reactant.

Next, you need to use the mole ratio between the limiting reactant and the product to find how many moles of BaSO4 are formed:

0.0421 mol H2SO4 x (1 mol BaSO4 / 1 mol H2SO4) = 0.0421 mol BaSO4

Finally, you need to multiply the moles of BaSO4 by its molar mass to get its mass:

0.0421 mol BaSO4 x 233.39 g/mol = 9.83 g BaSO4

So, the mass of BaSO4 formed is 9.83 g.

B) To calculate the pH of the mixed solution, you need to first find the concentration of OH- ions that remain after the reaction. You can do this by subtracting the moles of OH- that reacted with H+ from the initial moles of OH- and dividing by the total volume of the solution.

The initial moles of OH- are equal to the moles of Ba(OH)2:

0.050 mol Ba(OH)2 x (2 mol OH- / 1 mol Ba(OH)2) = 0.100 mol OH-

The moles of OH- that reacted with H+ are equal to the moles of H2SO4:

0.0421 mol H2SO4 x (2 mol H+ / 1 mol H2SO4) = 0.0842 mol H+

The remaining moles of OH- are:

0.100 mol OH- - 0.0842 mol H+ = 0.0158 mol OH-

The total volume of the solution is:

50 mL + 88.7 mL = 138.7 mL = 0.1387 L

The concentration of OH- is:

0.0158 mol OH- / 0.1387 L = 0.114 M

Next, you need to use the relationship between pH and pOH to find the pH:

pOH = -log[OH-] = -log(0.114) = 0.94 pH + pOH = 14 pH = 14 - pOH = 14 - 0.94 = 13.06

So, the pH of the mixed solution is 13.06.

Each signal's splitting (number of lines) is specified in terms of an increasing chemical shift, and the splitting tells us what is associated to a certain carbon (a). Lines N When moving from spectrum to structure, N-1 "neighbor" H's (b). N adjacent N+1 lines

In the atom's nucleus, protons, which are positively charged particles, are found. The constituents of an atom are protons, electrons, and neutrons. The nucleus, located in the middle of an atom, contains all of its mass. Protons and neutrons, known collectively as nucleons, are found in the nucleus.

While the electric field of an electron is pointed inward, that of a proton is outward. These fields interact with other particles in a manner similar to a particle distorting the space around it.

A proton is, for instance, the nucleus of a hydrogen atom or the H+ ion. No of the isotope, every hydrogen atom has one proton, every helium atom has two, every lithium atom has three, etc.

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Answer: 6.23

Explanation:

1) solve for pH  

pH=-log (H3O+) = - log 1.7 X 10^-8 =7.77

2) now do 14-pH  = 14 -7.77=6.23

Answer:

Explanation:

decomposers