I need the Formulas for:
* Density: (I think it's - D = M/V?)
* Mass: ?
* Volume?

(CHEMISTRY FORMULAS ONLY!!)

Answer:

City Hall - directs necessary activities throughout the city

Explanation:

Answer:

Town Hall,

Explanation:

The pH of the solution is 3.63.

The Henderson-Hasselbalch equation is pH = pKa + log ([A-]/[HA]), where [A-] is the concentration of the conjugate base (sodium formate, HCOONa) and [HA] is the concentration of the weak acid (formic acid, HCOOH). First, we need to find the pKa of formic acid, which is 3.75.

Now, we can plug in the given concentrations into the equation:
pH = 3.75 + log ([0.270]/[0.130])
pH = 3.75 + log (2.0769)
pH = 3.75 + 0.3174
pH = 3.63

Summary: Using the Henderson-Hasselbalch equation, we calculated the pH of a solution containing 0.270 M sodium formate and 0.130 M formic acid to be 3.63.

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Using only the periodic table, we can arrange the given elements in order of increasing ionization energy as follows :-  Bi < Po < At < Rn.

The ionization energy of an element is the energy required to remove an electron from a neutral atom in the gas phase. As we move across a period from left to right, the ionization energy generally increases due to the increasing nuclear charge and decreasing atomic radius.

Similarly, as we move down a group, the ionization energy generally decreases due to the increasing distance between the outermost electrons and the nucleus.

1. Bismuth (Bi): The outermost electron of Bi is in the 6p orbital, and the atomic radius is relatively large. Thus, Bi has the lowest ionization energy among the given elements.

2. Polonium (Po): The outermost electron of Po is in the 6p orbital, but the atomic radius is smaller than Bi due to the smaller atomic size. Thus, Po has a slightly higher ionization energy than Bi.

3. Astatine (At): The outermost electron of At is in the 6p orbital, but the atomic radius is smaller than Po due to the increasing nuclear charge. Thus, At has a higher ionization energy than Po.

4. Radon (Rn): The outermost electron of Rn is in the 6p orbital, and the atomic radius is smaller than At due to the smaller atomic size. Thus, Rn has the highest ionization energy among the given elements.

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Radioactive atoms undergo decay and transform into stable daughter atoms by emitting radiation in the form of particles and/or energy.

Radioactive atoms have an unstable nucleus, and they undergo a process called decay. During decay, radioactive atoms emit radiation, which can take the form of tiny particles and/or energy.

This emission of radiation leads to the transformation of the radioactive atom into a stable daughter atom.

The decay process is random and can occur at any time, similar to how an unpopped kernel in a microwave can pop at any moment.

In the analogy of microwave popcorn, the popping of kernels represents the decay of radioactive atoms.

Just like the rate of popping in a microwave can change over time, the rate of decay of radioactive atoms can also vary.

The rate of decay is determined by the half-life of the radioactive material, which is the time it takes for half of the radioactive atoms in a sample to decay.

Different radioactive isotopes have different half-lives, which can range from fractions of a second to billions of years.

Radioactive decay is a fundamental concept in nuclear physics and has important applications in various fields, including medicine, geology, and archaeology.

The process of decay allows unstable atomic nuclei to become more stable by releasing excess energy or particles.

This transformation results in the formation of a daughter atom, which has a different atomic number and, in some cases, a different mass number.

Radiometric dating is a technique that relies on the decay of radioactive isotopes to determine the age of rocks, fossils, and artifacts.

By measuring the ratio of parent and daughter isotopes in a sample, scientists can calculate the amount of time that has passed since the material was last heated or exposed to certain conditions.

This method provides valuable insights into Earth's history and the chronology of geological events.

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The final temperature of the water is 308 K.

To find the final temperature of the water, we need to 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. The heat lost by the iron will be equal to the heat gained by the water, so we can set the equations equal to each other and solve for the final temperature.

  Qiron = Qwater

Heat lost by iron:

  Q = iron mass x specific heat of iron x temperature of iron

      = 25 x 0.449 x (398 - T)

Heat gained by water:

  Q = water mass x specific heat of water x temperature of water

      = 25 x 4.18 x (T - 298)

Since heat lost = heat gained, therefore:

  25 x 0.449 x (398 - T) = 25 x 4.18 x (T - 298)

                        115.725T = 35608.55

                                    T = 308 K

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The gas with the highest rms speed at 200°C is H2O (choice B).

What is root-mean-square speed.?

The root-mean-square (rms) speed of gas molecules is a measure of the average speed of the molecules in a gas sample. It is defined as the square root of the mean of the squares of the velocities of individual gas molecules in the sample, where the velocity is the speed and direction of a molecule.

Mathematically, the formula for rms speed is:

rms speed = √(3RT/M)

According to the kinetic-molecular theory, the root-mean-square (rms) speed of gas molecules is directly proportional to the square root of the temperature and inversely proportional to the square root of the molar mass. Therefore, lighter molecules will have higher rms speeds than heavier molecules at the same temperature.

The formula for rms speed is:

rms speed = √(3RT/M)

where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.

At 200°C, the temperature in Kelvin is 200 + 273.15 = 473.15 K.

Comparing the molar masses of the gases given, we see that H2O has the lowest molar mass, followed by HCl, Cl2, and SF6, which has the highest molar mass.

Using the above formula, we can calculate the rms speeds of the gases at 200°C:

For H2O: rms speed = √(3RT/M) = √(3 x 8.314 x 473.15 / 18.015) = 603.2 m/s

For HCl: rms speed = √(3RT/M) = √(3 x 8.314 x 473.15 / 36.461) = 468.5 m/s

For Cl2: rms speed = √(3RT/M) = √(3 x 8.314 x 473.15 / 70.906) = 376.4 m/s

For SF6: rms speed = √(3RT/M) = √(3 x 8.314 x 473.15 / 146.06) = 259.8 m/s

Therefore, the gas with the highest rms speed at 200°C is H2O (choice B).

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Answer:

608 L

Explanation:

Using Boyle's law equation as follows:

P1V1 = P2V2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (L)

V2 = final volume (L)

According to the information provided in this question;

P1 = 1.00atm

P2 = 2.8atm

V1 = ?

V2 = 217L

Using P1V1 = P2V2

V1 = P2V2/P1

V1 = 2.8 × 217/1

V1 = 607.6/1

V1 = 607.6

The initial volume is 608 L

Answer:

Option D. fluorine-18

Explanation:

The attached photo gives the explanation.

In the attached photo, A zX represent the atom that will undergo beta decay to produce oxygen–18.

After the calculation, A zX was found to be fluorine–18.

Below is an example of the open-chain structure (as a Fischer projection) of 2-deoxy-D-glucose.

The Fischer projection should be aligned vertically, with the carbon atoms at the top and bottom and the oxygen atoms on the left and right. The chiral carbon atoms should be labeled and any hydrogens attached to them should be explicitly shown. Note that bonds to other hydrogens should not be shown.

O O | /| | / | | H | H | H | | H | | H | | H | H | H | | H | |H | C--C--C--C--C

The diagram provided is a Fischer projection of 2-deoxy-D-glucose. The vertical alignment of the carbon atoms at the top and bottom, and the oxygen atoms on the left and right is correct. The chiral carbon atoms should be labeled and any hydrogens attached to them should be explicitly shown. Note that bonds to other hydrogens should not be shown.

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Under ordinary circumstances, a gas that takes up 75 ml is heated to 17 °C and the pressure is lowered to 0.97 atm. The gas has now filled a capacity of 79.9 ml.

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:

(P₁ × V₁) / T₁ = (P₂ × V₂) / T₂

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P₂, V₂, and T₂ are the final pressure, volume, and temperature, respectively.

We are given P₁ = 1 atm (standard conditions), V₁ = 75 ml, T1 = 273 K (standard conditions + 0°C), P2 = 0.97 atm, and T₂ = 17°C + 273 = 290 K.

Substituting these values into the formula and solving for V₂, we get:

(1 atm × 75 ml) / 273 K = (0.97 atm × V₂) / 290 K

Simplifying and solving for V2, we get:

V₂ = (1 atm × 75 ml × 290 K) / (273 K × 0.97 atm) = 79.9 ml

Therefore, the new volume occupied by the gas is approximately 79.9 ml (three significant figures).

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4th pic is solid, gas

and the other one is further apart; increase

5th pic for second question is D

and the first question is kinetic energy

yw bakugo

After looking at answers I agree with the statement Chemistry is fun.

Answer:

Question 1:

Answer: True

• A nucleus comprises of "proton and neutron"

Question 2:

Answer: True

• Lithium atom has 3 protons while helium atom has 2 protons.

Question 3:

Answer: False

• Molecular compounds are formed when elements are combined be it metal or non-metal.

• A compound formed from a metal and non-metal is an ionic compound.

Question 4:

Answer: False

• Noble gases are inert / unreactive. They don't undergo any reaction because they are very stable.

Question 5:

Answer: True

Question 6:

Answer: False

\({ \rm{H _{2}O \: \dashrightarrow \: water}}\)

• The formular in the question is for hydrogen peroxide.

Question 7:

Answer: False

• What you have to know is that, molecular compounds such as halogens are made of discrete particles with weak vander waals forces of attraction, hence energy required to break these forces is quite low. Hence low melting points.

Question 8:

Answer: True

• Ionic compounds such as sodium chloride are highly soluble in water.

Question 9:

Answer: False

• Water is a polar covalent compound because it is formed due to hydrogen and covalent bonding. It is polar because oxygen is highly electronegative than hydrogen.

Question 10:

Answer: False

• Check answer for question 4

Question 11:

Answer: False

• They form charge of +1

Question 12:

Answer: True

• This are called radicals

Question 13:

Answer: False

• least reactive families are halogens and noble gases.

Question 14:

Answer: True

• This is a situation of ionic bonding.

Question 15:

Answer: False

• It is made up of 3 atoms.

The mass of silver produced at room conditions is approximately 54.324 grams.

To calculate the mass of silver produced, we need to determine the number of moles of silver nitrate used in the reaction, and then use the stoichiometry of the balanced equation to find the number of moles of silver produced.

First, let's calculate the number of moles of silver nitrate used:

Molar mass of AgNO3 = 108 + 14 + (3 * 16) = 169 g/mol

Number of moles of AgNO3 = Mass of AgNO3 / Molar mass of AgNO3

Number of moles of AgNO3 = 85 g / 169 g/mol

Number of moles of AgNO3 ≈ 0.503 moles

According to the balanced equation, 2 moles of AgNO3 produce 2 moles of Ag.

Since the molar ratio is 1:1, the number of moles of Ag produced is also 0.503 moles.

Now, let's calculate the mass of silver produced:

Molar mass of Ag = 108 g/mol

Mass of Ag = Number of moles of Ag * Molar mass of Ag

Mass of Ag = 0.503 moles * 108 g/mol

Mass of Ag ≈ 54.324 g

According to the molar concentration, the  concentration of the sulfuric acid is 0.9 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

In case of 2 solutions, molarity is calculated as, M₁V₁=M₂V₂ thus, M₁=0.75×30/25= 0.9 M.

Thus, the  concentration of the sulfuric acid is 0.9 M.

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Answer: To test the properties of the particles, Thomson placed two oppositely-charged electric plates around the cathode ray. The cathode ray was deflected away from the negatively-charged electric plate and towards the positively-charged plate. This indicated that the cathode ray was composed of negatively-charged particles.

Thomson also placed two magnets on either side of the tube, and observed that this magnetic field also deflected the cathode ray. The results of these experiments helped Thomson determine the mass-to-charge ratio of the cathode ray particles, which led to a fascinating discovery−-−minusthe mass of each particle was much, much smaller than that of any known atom. Thomson repeated his experiments using different metals as electrode materials, and found that the properties of the cathode ray remained constant no matter what cathode material they originated from. From this evidence, Thomson made the following conclusions:

The cathode ray is composed of negatively-charged particles.

The particles must exist as part of the atom, since the mass of each particle is only ~1/2000 the mass of a hydrogen atom.

These subatomic particles can be found within atoms of all elements.

While controversial at first, Thomson's discoveries were gradually accepted by scientists. Eventually, his cathode ray particles were given a more familiar name: electrons. The discovery of the electron disproved the part of Dalton's atomic theory that assumed atoms were indivisible. In order to account for the existence of the electrons, an entirely new atomic model was needed.

Answer:

Dalton's

Explanation:

Answer:

5 atoms

Explanation:

it has 4 hydro atoms and 1 nitrogen atom therefore it is 5

Answer:

the answer is 14

Explanation:

i just took the test on  Edg an i got it right

Answer:

Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.

These are some of the important functions of the cytokinesis hormone in plants :-

Cytokinesis is a group of growth regulators that is found in plants. It helps in performing cell divison of plant roots, and shoot system. It also helps in promoting the cell's growth, development, flowering, and seed formation.

It helps in the protein production which is important for mitosis. It provides resistance against certain diseases causing bacteria in crops. It mainly contains Nitrogen, Hydrogen, and a few atoms of oxygen in its structure.

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The options for the function of cytokinesis should be:

(A) performing cell division in plant roots

(B) shoot system

(C) promoting the cell’s growth, development

(D) All of these

Answer - (D) All of these

Answer:

The volume of the tank can be calculated using the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature.

In this case, we have P = 179 atm, n = 7.75 moles, R = 0.08206 Latm/(Kmol), and T = 295 K. Plugging these values into the ideal gas law equation and solving for V gives us:

V = (nRT)/P V = (7.75 moles * 0.08206 Latm/(Kmol) * 295 K) / (179 atm) V ≈ 1.01 L

So the volume of this tank at these conditions is approximately 1.01 liters.

Explanation:

Answer:

Volume = 1.05 L (3 s.f.)

Explanation:

To find the volume of the tank, we can use the ideal gas law.

\(\boxed{\sf PV=nRT}\)

where:

The given values are:

Substitute the given values into the formula and solve for V:

\(\implies \sf 179 \cdot V=7.75 \cdot 0.082057366080960\cdot 295\)

\(\implies \sf V=\dfrac{7.75 \cdot 0.082057366080960\cdot 295}{179}\)

\(\implies \sf V=\dfrac{187.6036532 \dots }{179}\)

\(\implies \sf V=1.04806510 \dots\;L\)

\(\implies \sf V=1.05\;L\;(3\;s.f.)\)

Therefore, the volume of the tank in these conditions is 1.05 liters (3 s.f.).

Answer:

89.51g of KClO4 is 0.03566 Liters (4 sig figs)

Explanation:

o calculate the liters in 89.51 grams of KClO4, we need to use the density of the substance. The density of KClO4 is 2.52 g/mL. To convert from grams to milliliters, we can use the formula:

Volume (mL) = mass (g) / density (g/mL)

Now we can plug in the given values:

Volume (mL) = 89.51 g / 2.52 g/mL = 35.66 mL

To convert mL to Liters we divide by 1000, so the volume of 89.51g of KClO4 is 0.03566 Liters (4 sig figs)

The two terms apply to oceanic crust rather than continental crust C. Denser and D. Younger in age

Oceanic Crust Oceanic crust, extending 5-10 kilometers (3-6 kilometers) beneath the ocean floor, is mostly composed of different types of basalts. Geologists often refer to the rocks of the oceanic crust as “sima.” Sima stands for silicate and magnesium, the most abundant minerals in oceanic crust.

Oceanic crust is thin (6 km thick) and dense (about 3.3 g/cm), consisting of basalt, gabbro, and peridotite. They include oceanic sediments (e.g. radiolarites, turbidites) and oceanic crust (e.g. basalt, pillow lava).

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Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green

hoped I helped

Neither the reduction and phosphorylation of glyceraldehyde 3-phosphate to produce 1,3-bisphosphoglycerate nor the oxidation of a molecule of NAD+ to NADH.

What is G3P and how does it work?

The energy-producing processes glycolysis and glycerolipid biosynthesis both require glycerol-3-phosphate (G3P), which is a necessary component.

                               Enzymes involved in G3P biosynthesis and catabolism, as well as those involved directly or indirectly in G3P biosynthesis, control the amount of G3P in plants.

What is the purpose of glyceraldehyde 3-phosphate?

The end result of the Calvin cycle is glyceraldehyde 3-phosphate, or G3P. A 3-carbon sugar, it serves as the building block for the creation of other carbs.

                                The cycle is continued in part by using this G3P to regenerate the RuBP, but some of it is also available for molecular synthesis and is utilized to create fructose diphosphate.

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Answer:

The answer is carbon and silicon

Answer and Explanation:

The answers would be:

A. Domestic cats live in about 34% of homes in the United States. (Statistical statements are, most of the time, facts and not an opinion)

C. Modern domestic cats are closely related to Near Eastern wildcats. (Fact)

D. Cats eat rodents that can spread disease. (Fact)

The above statements are facts because they don't make a judgement or show a position on the topic, only show what is known and proven to be true.

B and E are incorrect because they take a side of the topic, in which someone else might disagree with the opinion. These opinions aren't proven to be true.

#teamtrees #PAW (Plant And Water)

I hope this helps!

Answer:

pure hydrogen is a pure substance even though it consists of many different types of molecules. what makes it pure substance is that it is free from contamination.

Photosynthesis is a redox reaction. This means that H₂O is oxidized during the light reactions and CO₂ is reduced during the Calvin cycle.

The chemical reaction in which the oxidation and reduction take place simultaneously is known as a redox reaction. In this type of reaction, the reactants that are reduced gain electrons, while the reactants that are oxidized lose electrons during the reaction.

The oxidation of water and the reduction of carbon dioxide is the core of photosynthesis, an energy transducing process in which light energy is converted to chemical energy. During photosynthesis, water molecules are oxidized to produce oxygen gas and positively charged hydrogen ions. The process of photosynthesis is of two types, light-dependent reactions and light-independent reactions.

The light-dependent reactions occur in the thylakoid membranes of chloroplasts and involve the conversion of light energy into chemical energy. On the other hand, the light-independent reactions take place in the stroma of chloroplasts, where carbon dioxide is reduced to produce glucose molecules. Therefore, Photosynthesis is a redox reaction. This means that H2O is oxidized during the light reactions and CO2 is reduced during the Calvin cycle.

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Answer:Switch off lighting in refrigeration areas when not in use?

Explanation: