3. Which of these statements is false?
A. Electrons have a negative charge
B. Electrons have a mass of 1 amu
C. The nucleus of an atom is positively charged
D. The neutron is found in the nucleus of an atom

Answer:

37

Explanation:

( 98.6 - 32 ) × 5(100c) ÷ 9(180f) = 37

8.96 is the pH after 15.00 ml of hcl has been added.

What is pH?

The H+ ion concentration's negative logarithm is known as pH

We are aware that not every acid or base reacts with a chemical substance at the same pace. Other people respond extremely strongly, some people mildly, and some people don't react at all. We utilise a universal indicator that exhibits various colours at various concentrations of hydrogen ions in solution to objectively assess the strength of acids and bases

0 mL of NaOH has not been added, leaving a pH of 2.32.

Only HCOOH is present in the solution prior to the addition of any NaOH. The balance of the HCOOH in solution controls pH.

Ka = HCOO- concentration times H3O+ concentration divided by HCOOH concentration

8.96 is the pH after 15.00 ml of hcl has been added.

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When human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere, then atmosphere is most greatly impacted.

Greenhouse gases are gases the in the atmosphere of Earth that trap heat.

The greenhouse gases trap heat in the atmosphere and contribute to the phenomenon of global warming, which has numerous negative effects on the climate and environment.

Excessive greenhouse gas emissions can cause rising global temperatures, more frequent and severe weather events, sea level rise, ocean acidification, and other environmental changes that have significant impacts on ecosystems, agriculture and human societies. Therefore, it is important to reduce greenhouse gas emissions to mitigate the impacts of the climate change.

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Answer: The atom's radius increases and the atom becomes a negative ion.

Explanation: The chlorine atom gains an electron, and its radius becomes larger. The chlorine atom loses an electron, and its radius becomes smaller. The chlorine atom loses an electron, and its radius becomes larger.

Answer:

Chlorine gains an electron, leaving it with 17 protons and 18 electrons. Since it has 1 more electron than protons, chlorine has a charge of −1, making it a negative ion. When ions form, atoms gain or lose electrons until their outer energy level is full.

Explanation:

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Answer:

\(\boxed {\tt 944.748 \ grams}\)

Explanation:

The formula for density is:

\(d=\frac{m}{v}\)

Rearrange the formula for mass, m. Multiply both sides by v.

\(d*v=\frac{m}{v} *v\)

\(d*v=m\)

Mass is found by multiplying the mass by the volume.

The density of the gold is 19.32 grams per cubic centimeter. The volume is 48.9 cubic centimeters.

\(d= 19.32 \ g/cm^3 \\v=48.9 \ cm^3\)

Substitute the values into the formula.

\(m= 19.32 \ g/cm^3 *48.9 \ cm^3\)

Multiply. Note the centimeters cubed will cancel out.

\(m= 19.32 \ g * 48.9\)

\(m= 944.748 \ g\)

The mass of the gold is 944.748 grams.

Option C is the appropriate response. In the third energy level of an element with five electrons, the electron configuration is 1s22s22p63s23p3. This is so because the third energy level, 2p, can only contain a maximum of six electrons while the first two energy levels, 1s and 2s, can each hold two electrons.

Accordingly, two  electrons in the 3s orbital and two electrons in the 3p orbital combine to fill the final four electrons in the third energy level. The symbol for this is 1s22s22p63s23p3.

Because Option A has an additional electron in the third orbital, Option B has an extra electron in the third orbital, and Option D has an extra electron in the second orbital, those other possibilities are erroneous.

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The products of the reaction between strontium hydroxide (Sr(OH)2) and nitric acid (HNO3) are strontium nitrate (Sr(NO3)2) and water (H2O). This can be seen by examining the reactants and balancing the equation:

Sr(OH)2 + 2 HNO3 → Sr(NO3)2 + 2 H2O

In this equation, there are two molecules of nitric acid reacting with one molecule of strontium hydroxide. The reaction between these compounds results in the formation of one molecule of strontium nitrate and two molecules of water.
In chemical reactions, it is important to identify the products that are formed. This information can be used to determine the efficiency of the reaction, as well as to predict the outcomes of other chemical reactions. By understanding the products of a reaction, scientists and engineers can design new compounds and processes that are safer, more efficient, and more environmentally friendly.

Overall, the products of the reaction between strontium hydroxide and nitric acid are strontium nitrate and water, as represented by the balanced chemical equation.

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Answer:

It should be B: 0.01 kJ

Answer:

Hey...The answer is B) 0.01 kJ

Photosynthesis:

Reactants - H2O + CO2;

Products - CsH12O6 + O2

Cellular Respiration:

Reactants - CsH12O6 + O2;

Products - H2O + CO2

Explanation:

Photosynthesis:

Reactants -

H2O + CO2Products - CsH12O6 + O2

The process of converting light energy to chemical energy occurs in photosynthesis, which occurs in plant cells.

The process of photosynthesis entails the use of carbon dioxide (CO2) and water (H2O) to produce organic molecules such as glucose (C6H12O6) and oxygen (O2).

The reaction for photosynthesis is 6CO2 + 6H2O -> C6H12O6 + 6O2. In addition, the process of photosynthesis entails two stages: light-dependent reactions and light-independent reactions.

Cellular Respiration:

Reactants - CsH12O6 + O2Products - H2O + CO2

Cellular respiration is the process by which cells transform nutrients into adenosine triphosphate (ATP). When oxygen is present, cellular respiration occurs. Aerobic respiration is another name for cellular respiration.

The three main stages of cellular respiration are glycolysis, the citric acid cycle, and the electron transport chain. C6H12O6 + 6O2 -> 6CO2 + 6H2O + 38 ATP is the reaction for cellular respiration.

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The net carbon dioxide production from glucose in mol/mol is 1.

To determine the net carbon dioxide production from glucose in mol/mol, we need to examine the stoichiometric coefficients in the simplified stoichiometric equation given for growth of hybridoma cells:

\(C_{6}\)\(H_{12}\)\(O_{6}\) + p \(C_{5}\) \(H_{10}\) \(O_{3}\) \(N_{2}\) + \(O_{2}\)+ r \(CO_{2}\) → s \(CH\)1.8200.84N0.25 + \(C_{3}\)\(H_{2}\)\(O_{3}\) + u \(NH_{3}\) + v \(CO_{2}\) + w \(H_{2}\) \(O\)

The coefficient 'r' represents the net carbon dioxide production from glucose, as it is the coefficient in front of \(CO_{2}\) .

Based on the information given in the problem, for every 1 g of glucose consumed, 0.90 g of lactic acid and 0.26 g of biomass (\(CH\)1.8200.84N0.25) are produced. Since glucose has a molar mass of 180.16 g/mol, we can convert the given masses to moles:

Mass of glucose consumed = 1 g

Moles of glucose consumed = 1 g / 180.16 g/mol = 0.00555 mol (rounded to 5 decimal places)

Mass of lactic acid produced = 0.90 g

Moles of lactic acid produced = 0.90 g / 90.08 g/mol = 0.00999 mol (rounded to 5 decimal places)

Now, we can use the stoichiometric coefficients to determine the net carbon dioxide production (mol/mol) from glucose:

Stoichiometric coefficient of glucose \(C_{6}\)\(H_{12}\)\(O_{6}\)) = 1

Stoichiometric coefficient of lactic acid (\(C_{3}\)\(H_{6}\)\(O_{3}\) ) = 1 (since 'r' is the coefficient in front of \(CO_{2}\) )

Net carbon dioxide production from glucose (mol/mol) = r / p = 1 / 1 = 1

So, the net carbon dioxide production from glucose in mol/mol is 1.

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Answer :

A.) Kinetic energy

Explanation:

When work is either added to or taken away from a system, it forces the kinetic energy to change.

The work-energy theorem states : change in kinetic energy of an object is equal to the work done on the object

[ I took the quiz already on Edgenuity and received 100% ]

Hope this helped ! :)

Answer:

Kinetic energy

Explanation:

Edge 2020

Note that the experiment described is the Rutherford Scattering Experiment invented by Ernest Rutherford for simulating alpha particle dispersion. See the procedure below.

Students might use the above contraption to simulate alpha particle dispersion by rolling the marble down the moveable slope towards the circular weight placed on the huge sheet of lined paper.

The scattering of alpha particles can be studied by measuring the angle of deflection using a protractor.

The significance of this experiment is that it contributes to our understanding of subatomic particle behavior, notably how alpha particles disperse when they contact with other particles. See a clearer image attached.

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Understanding the relationship between reactants and products in a reaction is crucial for understanding chemistry. That is what stoichiometry is.

It is a quantitative relationship between the mass (and thus the number of moles) of different products and reactants in a chemical reaction.

Chemical reactions must be balanced, or in other words, the products and reactants must both contain the same number of different atoms.

A chemical reaction cannot yield any knowledge about the relationship between its products and reactants if it is not balanced. In order to balance a chemical reaction, you should do so initially.

By placing coefficients in front of the reactants and products, we may balance processes. The stoichiometric coefficients are these values.

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A measurement of the amount of light taken in by a sample is called absorbance or optical density. It is a measure of how much light is absorbed by a material, such as a solution or a sample, as it passes through it.

Absorbance is often used to quantify the concentration of a particular substance in a solution. This is because the amount of light absorbed by a sample is proportional to its concentration. In other words, the more of a particular substance present in a solution, the more light it will absorb.

The measurement of absorbance is usually carried out using a spectrophotometer, which measures the intensity of light before and after it passes through a sample. The difference in intensity between the two measurements is used to calculate the absorbance of the sample.

The absorbance of a sample is typically reported in units of absorbance units (AU) or optical density (OD). The higher the absorbance or OD value, the more light is absorbed by the sample, and the higher the concentration of the substance being measured.

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The structure of organic compounds allows them to function as pigments through chromophore and acid or basic groups.

This is defined as a colored substance which is completely or nearly insoluble in water.

The structure of organic compounds allows them to function as pigments include chromophore and the acid or basic groups such as OH, SO3H, etc.

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Aluminum (Al) and magnesium (Mg) are diamagnetic in their ground state, while bromine (Br) and silver (Ag) are paramagnetic.

In chemistry, diamagnetic substances are those that do not possess any unpaired electrons in their electron configuration. This means that all the electrons in the atom or ion are paired up within their respective orbitals, resulting in no net magnetic moment.

Both aluminum (Al) and magnesium (Mg) have completely filled electron configurations in their ground state.

Aluminum (atomic number 13) has the electron configuration 1s² 2s² 2p⁶ 3s² 3p¹, where all the available orbitals are occupied by paired electrons. Therefore, it is diamagnetic.

Magnesium (atomic number 12) has the electron configuration 1s² 2s² 2p⁶ 3s², which is also fully filled with paired electrons. As a result, magnesium is diamagnetic.

On the other hand, bromine (Br) and silver (Ag) have unpaired electrons in their ground state electron configurations.

Bromine (atomic number 35) has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵, and the 4p⁵ subshell contains one unpaired electron. Hence, bromine is paramagnetic.

Silver (atomic number 47) has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d¹⁰, and the 5s¹ subshell contains one unpaired electron. Thus, silver is paramagnetic.

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The molarity of the solution that results from dissolving 31.8 g of lithium nitrate in 1.0 L of water is 0.461 M.  To calculate the molarity of a solution, we use the formula: Molarity (M) = moles of solute ÷ liters of solution.

The steps to calculate the molarity of lithium nitrate are

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The initial volume of the container can be calculated using the ideal gas formula, PV = nRT, where P is pressure, V is volume, n is number of moles, R is gas constant, and T is temperature:

The best illustration of Avogadro's law is when a balloon is inflated. The volume of the balloon grows as you add moles of gas. Similar to how a balloon loses gas and its volume as you collapse it

According to Avogadro's law, all gases with an identical volume and the same temperature and pressure have an equal number of molecules. The volume of an ideal gas at a certain mass.

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a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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Answer:

a

Explanation:

Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

The states of matter are the different forms of the matter in which it can exist. They are solids, liquids and gases. Solids are the states of matter in which molecules are very near to each other. They have fixed shape and volume. Liquids is the states of matter in which molecules are a little far from each other. They have different shape and fixed volume. Gas is the states of matter in which molecules are a very far from each other. They have different shape and different volume.

There are two more states of matter which are called as Plasma, Bose Einstein Condensate.

Plasma have highest energy and Bose Einstein Condensate have lowest energy.

Therefore, Solids are the most organized state of matter. States of matter change when energy is added or removed. Gas is the state of matter has the most movement of its particles.

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Answer:

Gas laws, Laws that relate the pressure, volume, and temperature of a gas. ... These two laws can be combined to form a single generalization of the behavior of gases known as an equation of state, PV = nRT, where n is the number of gram-moles of a gas and R is called the universal gas constant.

Explanation:

Hope it helps

Answer:

Increases by 100 Pa

Explanation:

According to The Ideal Gas Equation,

On the Modified Mercalli Scale, intensity XII is described as "Catastrophic" or "Total Destruction."

Intensity XII represents the highest level of damage and destruction caused by an earthquake. It indicates that the shaking is so severe that virtually all buildings and structures experience extensive damage or complete collapse.

Ground fissures, landslides, and other significant ground deformations may also occur. Utility systems, such as water, gas, and electrical networks, are likely to be extensively disrupted or completely destroyed. Additionally, there may be widespread panic, and the overall social and economic impact can be devastating.

The Modified Mercalli Scale is a subjective scale that assesses the effects of an earthquake based on observed damage and the impact on people, structures, and the environment. It provides a qualitative description of the level of shaking and its consequences rather than relying on instrumental measurements.

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The mass of solid precipitate formed when you react 85.6 mL of 0.32 M \(AgNO_{3}\) with excess aqueous \(K_{2}CrO_{4}\) is 4.54 g (Option E).

To determine the mass of solid precipitate formed when you react 85.6 mL of 0.32 M \(AgNO_{3}\) with excess aqueous \(K_{2}CrO_{4}\), follow these steps:

1. Determine the moles of \(AgNO_{3}\):

Moles = Molarity × Volume (in liters)

Moles = 0.32 M × (85.6 mL × 0.001 L/mL) = 0.027392 mol \(AgNO_{3}\)

2. Write the balanced chemical equation for the reaction:

2 \(AgNO_{3}\) (aq) + \(K_{2}CrO_{4}\) (aq) → \(Ag_{2}CrO_{4}\) (s) + 2 \(KNO_{3}\) (aq)

From the balanced equation, 2 moles of \(AgNO_{3}\) react with 1 mole of \(K_{2}CrO_{4}\) to produce 1 mole of \(Ag_{2}CrO_{4}\).

3. Determine the moles of \(Ag_{2}CrO_{4}\) formed:

Moles of \(Ag_{2}CrO_{4}\) = (0.027392 mol \(AgNO_{3}\)) × (1 mol Ag2CrO4 / 2 mol \(AgNO_{3}\))

= 0.013696 mol \(Ag_{2}CrO_{4}\)

4. Calculate the mass of \(Ag_{2}CrO_{4}\) formed:

Mass = moles × molar mass

The molar mass of \(Ag_{2}CrO_{4}\) is approximately 331.73 g/mol.

Mass = 0.013696 mol × 331.73 g/mol = 4.54 g

Thus, the mass of solid precipitate formed is 4.54 g (Option E).

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Answer:

b

Explanation:

The only option that is not an effect of increasing carbon dioxide levels in the atmosphere is cutting down forests.

An increasing level of carbon dioxide in the atmosphere causes ocean acidification due to the dissolution of the gas in the oceans. Carbon dioxide also causes global warming - an increase in the average global temperature due to the heat (from the sun) absorbing ability of the gas.

Global warming causes an increase in the level of seas and oceans as a result of the melting of glaciers and polar ice caps. The rise in sea levels causes flooding with associated loss of habitats and biodiversity.

The increase in global temperature also means that cold-related deaths will reduce.

Correct option: b

Answer:

C. cutting down forests

Explanation:

edge test

Answer:

Temperature is being used

Carbonyl groups is bonded to sp2 hybridized carbon atom.

The interaction within a carbonyl group, when both the oxygen and carbon atoms are sp2 hybridized, is explained by the same hypothesis.

When a carbon atom bonds with one s-orbital and two p orbitals, it becomes sp2 hybridized. Between the three atoms, 2 individual connections and a double bond are formed. The hybridization orbitals are arranged in a triangle with bonds at 120° angles.

A carbon atom is the double to an oxygen atom to form a carbonyl group, which is a chemical organic functional group. Aldehydes and ketones, which are typically joined to another carbon compound, are the simplest carbonyl groups. Many aromatic chemicals have these structures, which contribute to flavor and fragrance.

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Answer: Actual Yield