an atom with an imbalance of electrons to protons is a. a hadron. b. a baryon. c. an ion. d. an isotope. e. none of these

Answer:

Father - Mother

Sperm - Egg and those fertilized are called a Zygote

Explanation:

Answer:

one half from the father and the other half from the mother

Explanation:

hope it helps

When only 1 mol of oxygen was intended to be produced, a process instead yields 4.93 L of oxygen. The percent yield of the reaction is 493%.

Percent yield is a measure of how much of the desired product is produced in a chemical reaction. It is calculated by comparing the actual yield of a product to the theoretical yield, which is the amount of product that would be produced if the reaction were 100% efficient.

To calculate the percent yield, you can use the formula:

= percent yield

= (actual yield / theoretical yield) x 100%

The theoretical yield of a reaction is calculated by multiplying the number of moles of reactant used by the stoichiometry of the reaction. In this case, the reaction is supposed to produce 1 mol of oxygen, which is the theoretical yield. To calculate the actual yield, we can use the Ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of mol. Since we know that V = 4.93 L, we can use this information to find n:

= n

= (PV) / RT

The actual yield is 4.93 L of O2 or 4.93 L of any gas at STP (Standard Temperature and Pressure) is equivalent to 4.93 moles of O2.

Then we can use this information to calculate the percent yield:

= percent yield

= (actual yield / theoretical yield) x 100%

= (4.93 moles O2 / 1 mole O2) x 100%

= 493%

So, the percent yield of the reaction is 493%.

It's important to note that a percent yield of greater than 100% is usually an indication of an error in the measurement or calculation of the actual yield, or it could be an indication that the theoretical yield is incorrect.

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Answer:

respritory and circulatory systems

lungs and heart

Explanation:

a. AgNO₃ + NaBr → AgBr + NaNO₃

b. 8.10 mol of sodium bromide is required.

c. 616 g of silver bromide is formed.

6. Copper is the limiting reactant.

7. Aluminum hydroxide is the limiting reactant.

8. The percentage yield of the reaction is 75%.

a. The balanced equation for the double-displacement reaction between silver nitrate and sodium bromide is:

AgNO₃ + NaBr → AgBr + NaNO₃

b. To determine the amount of sodium bromide required, we need to use the balanced equation and the stoichiometry of the reaction. From the balanced equation, we know that the molar ratio of AgNO₃ to NaBr is 1:1. Therefore, if 4.50 mol of AgNO₃ reacts, we need an equal amount of NaBr:

4.50 mol AgNO₃ x (1 mol NaBr/1 mol AgNO₃) = 4.50 mol NaBr

c. To determine the mass of silver bromide formed, we need to use the balanced equation and the molar mass of AgBr. From the balanced equation, we know that the molar ratio of AgNO₃ to AgBr is 1:1. Therefore, if 4.50 mol of AgNO₃ reacts, we form an equal amount of AgBr:

4.50 mol AgNO₃ x (1 mol AgBr/1 mol AgNO₃) x (187.77 g AgBr/1 mol AgBr)

= 841.965 g AgBr or 616 g of silver bromide.

6. To identify the limiting reactant, we need to compare the amount of each reactant to the stoichiometry of the reaction. The balanced equation for the single replacement reaction between copper and silver nitrate is:

Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

From the balanced equation, we see that the molar ratio of Cu to AgNO₃ is 1:2. Therefore, we need twice as many moles of AgNO₃ as we have moles of Cu. If we have 2.50 mol of Cu and 5.50 mol of AgNO₃, we have enough AgNO₃ to react with all of the Cu and there will be some excess AgNO₃ left over. Therefore, the limiting reactant is Cu.

7. To identify the limiting reactant, we need to calculate the amount of product that can be formed from each reactant and compare them. The balanced equation for the double-displacement reaction between sulfuric acid and aluminum hydroxide is:

H₂SO₄ + 2Al(OH)₃ → Al₂(SO₄)₃ + 6H₂O

From the balanced equation, we see that the molar ratio of H₂SO₄ to Al(OH)₃ is 1:2. Therefore, we need twice as many moles of Al(OH)₃ as we have moles of H₂SO₄. If we have 30.0 g of H₂SO₄ and 25.0 g of Al(OH)₃, we can calculate the number of moles of each reactant:

moles of H₂SO₄ = 30.0 g / 98.08 g/mol = 0.306 mol

moles of Al(OH)₃ = 25.0 g / 78.00 g/mol = 0.320 mol

From the balanced equation, we see that the molar ratio of H₂SO₄ to Al₂(SO₄)₃ is 1:1. Therefore, the maximum amount of Al₂(SO₄)₃ that can be formed is 0.306 mol. Since we need twice as many moles of Al(OH)₃ as we have moles of H₂SO₄, the amount of Al₂(SO₄)₃ that can be formed is limited by the amount of H₂SO₄. Therefore, the limiting reactant is H.

8. To calculate the percentage yield of a reaction, we use the formula:

% yield = (actual yield / theoretical yield) x 100%

In this case, the estimated theoretical yield is given as 20.0 g and the actual experimental yield is 15.0 g. Plugging these values into the formula, we get:

% yield = (15.0 g / 20.0 g) x 100%

% yield = 75%

Therefore, the percentage yield of this reaction is 75%.

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Based on the data, propane, being a nonpolar molecule, will not be attracted to a charged rod. On the other hand, propanol, as a polar molecule with a hydroxyl group (-OH), will experience an attraction towards the charged rod due to its dipole moment. Therefore, only propanol will bend towards a charged rod.

To predict whether propane, propanol, or both will bend toward a charged rod, we need to consider the polarity and molecular structure of these substances. Propane is a nonpolar molecule, meaning that its electrons are equally shared between the carbon and hydrogen atoms. Propanol, on the other hand, is a polar molecule due to the presence of an OH group, which gives it a slightly negative and positive end.

When a charged rod is brought near these substances, the nonpolar propane will not be affected by the electric field and will not bend toward the rod. However, the polar propanol will experience an attractive force towards the charged rod due to the separation of positive and negative charges within the molecule. Therefore, propanol is likely to bend towards a charged rod, but propane is not.

In summary, based on the data, propanol is predicted to bend toward a charged rod, but propane is not.

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1) C2H2 + O2 -> CO2 + H2O. 2) 2.5 moles of C6H12O6 reacts to produce 15 moles of CO2. 3) 19.55 grams of C6H12O6 was initially used.

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Answer:

F

Explanation:

Answer:

atomicity of water is 3

Explanation:

Answer:

please mark brainliest!

Explanation:

one molecule of water contains two atoms of hydrogen and one atom of oxygen, the atomicity of water is three.

The relative abundance of isotopes is the number of atoms of a particular isotope divide by the total number of atoms of all isotopes of that element, multiplied 100 percent.

The relative abundance of an isotope is the percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.

Also relative abundances refers to the relative proportions of the stable isotopes of each element. They are most often quoted as atom percentages

To calculate the percent abundance of each isotope in a sample of an element,  the number of atoms of a particular isotope is usually divide by the total number of atoms of all isotopes of that element and then multiply the result by 100 since it is expressed in percentage.

Mathematically, the formula for relative abundance is given as;

R.A = ( number of atoms of isotope / total number of atoms ) x 100%

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Answer:

3.07g of NaCl are present in the solution

Explanation:

A 1.05 M NaCl solution means you have 1.05 moles of NaCl per liter of solution. In 50.0mL = 0.0500L you will have:

0.0500L * (1.05mol / L) = 0.0525 moles of NaCl.

To convert these moles to grams you must use molar mass of the compound (Molar mass NaCl: 58.44g/mol). In 0.0525 moles of NaCl you will have:

0.0525mol * (58.44g / mol) =

Answer:

Sodium hydrogencarbonate or sodium carbonate

This is Single displacement reaction as copper is displacing silver from silver nitrate

A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another. Starting ingredients are always pure elements combined with an aqueous compound, such as pure hydrogen gas or zinc metal. A new aqueous compound and a different pure element will be produced as products when a replacement reaction occurs.

Cu(s) + 2AgNo3(aq) → 2Ag(s) + Cu(NO3)2(aq)

When an atom or group of atoms in a molecule are replaced by another atom, this is referred to as a displacement reaction. For instance, copper metal is displaced when iron is added to a solution of copper sulphate.

A + B-C → A-C + B

The above equation exists when A is more reactive than B.

A and B have to be either:

Halogens where C indicates a cation.

Different metals wherein C indicates an anion.

Different kinds of single replacement reactions

The reactivity series identifies three primary categories of single replacement reactions:

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The density of an unknown metal object if its mass is 53.72 g and it displaces 7.9 ml of water is 6.8 g/mL.  

Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.

In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.

According to the question,

The mass of the metal object = 53.72 g.

The volume of the metal object = 7.9 ml.

The formula for calculating the density is as follows:

                      = 53.72 g / 7.9 ml = 6.8 g/mL.

Therefore, the density of an unknown metal object if its mass is 53.72 g and it displaces 7.9 ml of water is 6.8 g/mL.  

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An element can have multiple isotopes. Isotopes correspond to variations of the same element with respect to the number of neutrons in its nucleus. the number they give us, 35 and 37 correspond to the mass number of chlorine. The percentage will be how abundant the element is.

To find the average atomic mass we must multiply the mass of the isotope by its respective percentage of abundance and add these two results.

So, the average atomic mass of Cl will be:

Answer: the average atomic mass of chlorine is 35.454 amu

The melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid is dependent on several factors, including the purity of the compound and the presence of any impurities.

Therefore, an exact melting point cannot be provided without specific experimental data. However, it is generally observed that organic compounds have a range of melting points rather than a single specific value.

If you are conducting an experiment and need to determine the melting point of (2R,3S)-2,3-dibromo-3-phenylpropanoic acid, it is recommended to perform the melting point determination experimentally using appropriate laboratory techniques and equipment. This involves heating a small amount of the compound and observing the temperature range at which it melts. The observed melting point can then be compared to known literature values to assess the purity of the compound.

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Answer:

19

Explanation:

The number below the element Fluorine is 18.99 which rounds to 19.

Answer:

The atomic mass of F is 19.

Explanation:

The measure of average kinetic energy of molecules is called tempreture.

What is kinetic energy ?

kinetic energy is a form of energy that an particle has by reason of it's motion.

If we want to accelerate an object then we must apply a force .

The average of all kinetic energy the molecule assumed to be directly proportional to the absolute tempreture of the gas.

The Kelvin tempreture of a substance is directly proportional to the average kinetic energy of the particles of the substance.

This is the reason why measure of the average kinetic energy of the molecule of a material called tempreture.

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Option (c) 38.9 atm

Given that: Mass of CO2 (m) = 35.0 g

Temperature of the system (T) = 25 o*C or 298 KV = 500 mL or 0.5 L

To find out the pressure (P) exerted by CO2 using the ideal gas equation which is

                                                PV = nRT

                      where,

                                  P = Pressure of the system

                                  n = number of moles of gas

                                  R = Ideal Gas Constant (R = 0.0821 Latm/molK)

                                  T = Temperature of the system

                                  V = Volume of the system

Substitute the given values in the ideal gas equation,

                                  PV= 38.9g

So, the pressure exerted by 35.0 grams of carbon dioxide at a temperature of 25oC and a volume of 500. mL is approximately 38.82 atm.

Hence, option (c) 38.9 atm is the correct answer.

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7. The pH of water is pH7.

The pH scale measures the acidity or alkalinity of a substance. It ranges from 0 to 14, with pH7 considered neutral. Water has a pH of 7, indicating that it is neither acidic nor basic. It is important to note that the pH of pure water can vary slightly due to the presence of dissolved gases and minerals, but it generally remains close to pH7.

8. When fish die from pollution, the pH is typically around pH4.

Pollution can introduce harmful substances into water bodies, leading to a decrease in pH. Acidic pollutants, such as sulfur dioxide and nitrogen oxides, can cause the pH of water to drop significantly. When fish are exposed to highly acidic water, their physiological processes are disrupted, and they may die as a result. A pH of around pH4 is considered highly acidic and can be detrimental to aquatic life.

9. A solution with a pH less than 7 is acidic.

This statement is false. A solution with a pH less than 7 is actually considered acidic, not basic. The pH scale ranges from 0 to 14, with pH7 being neutral. Solutions with a pH below 7 are acidic, indicating a higher concentration of hydrogen ions (H+) in the solution. On the other hand, solutions with a pH above 7 are basic or alkaline, indicating a higher concentration of hydroxide ions (OH-) in the solution.

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Answer:

sodium dihydrogen phosphate (NaH2PO4),

Phosphate Salt

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Rock formations change over the years and their position within the formation helps scientists and researchers determine the age of each layer. The oldest layers are at the bottom of the structure and the newest layers are at the top.

The bottom layer of rock forms first so it is the oldest layer. All layers above are younger and the top layer is the youngest of them all. This order is relative because we cannot know exactly when each layer was formed, only that each layer is younger than the layer below it. The superposition principle shows that younger rock layers lie on top of older rock layers.

Each layer is older than the layer above it. Layer D was deposited first so it is the oldest layer because it is at the bottom. Younger rock units in the order of layers C, B, and A. Sedimentary rocks are piled on top of each other. So the youngest layer is on top of the sequence and the oldest layer is on the bottom.

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Answer:

Explanation:

Engineers use their understanding of kinetic energy (KE) and potential energy (PE) to make their designs better and safer in several ways, such as:

   Energy Absorption: Engineers use materials that can absorb and dissipate kinetic energy in order to reduce the impact of collisions or other high-energy events. This can be achieved through the use of materials such as crushable foam or crush zones in cars, or the use of energy-absorbing barriers in buildings and bridges.

   Stored energy: Engineers also use their understanding of potential energy to design systems that can store energy for later use. For example, in the design of hydroelectric dams, engineers use the potential energy stored in water behind the dam to generate electricity. Similarly, engineers use the potential energy stored in compressed gases or springs to power various machines or devices.

   Safety feature: Engineers also use their understanding of Kinetic energy to design safety features such as seat belts and airbags in cars. They use the energy-absorbing materials to decrease the kinetic energy of the passengers during a collision.

   Energy Efficiency: Engineers also use their understanding of energy to design systems that are more energy efficient. For example, they use their knowledge of potential energy to design wind turbines that can generate more electricity from the wind, or use their knowledge of kinetic energy to design more efficient cars that use less fuel.

The fish would not survive because the amount of the oxygen corresponds only to 0.0047ppm.

We know that the ppm is one of the units that can be used to measure the concentration. Note that the ppm is the acronymn that stands for parts per million.

In this case, we have to note that the parts per million that we talking about in the problem that we have here is actually mL or oxygen per mL of water. We can see that in the case that we have, the amount of the oxygen is 0.0047 mL in 1L of water which is less than the threshold amount required.

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Answer:

The bacteria cell has cytoplasm.

The concentration of the NaOH solution is approximately 0.12 M. To determine the concentration of the NaOH solution, we can use the concept of stoichiometry and the balanced chemical equation for the reaction between NaOH and HCl:

NaOH + HCl -> NaCl + H2O

First, let's determine the amount of HCl used in the titration. Since the volume of the HCl solution is 24.53 mL and its concentration is 0.250 M, we can calculate:

Amount of HCl = Volume × Concentration

             = 24.53 mL × 0.250 mol/L

             = 6.1325 mmol

According to the balanced equation, the stoichiometric ratio between NaOH and HCl is 1:1. Therefore, the amount of NaOH in the solution is also 6.1325 mmol.

Now, let's calculate the concentration of the NaOH solution:

Concentration of NaOH = Amount of NaOH / Volume of NaOH solution

                    = 6.1325 mmol / 50.00 mL

                    = 0.1227 mol/L

Rounding to the appropriate number of significant figures, the concentration of the NaOH solution is approximately 0.12 M.

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Explanation:

The ice melting would make more water because ice is water and if it melts it make water.

hope this helps :)

Answer:

19) 3.6920 × 10⁻⁵

20) 4.059× 10²

21) 2.46810121416 × 10³

22)  1.0000× 10⁻³

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

For example:

0.000036920

In scientific notation =  3.6920 × 10⁻⁵

405.9

In scientific notation  = 4.059× 10²

2468.10121416

In scientific notation  = 2.46810121416 × 10³

0.0010000

In scientific notation  = 1.0000× 10⁻³