What happens to most embryos with extra chromosomes? Explain your answer.

The scientist I have chosen is J.J. Thomson, who made significant contributions to the study of atomic structure in the late 19th and early 20th centuries.

Thomson's most well-known contribution is his discovery of the electron, which he identified as a negatively charged particle present in all atoms. This discovery formed the basis of Thomson's "plum pudding" model of the atom, which proposed that atoms consisted of a positively charged "pudding" with negatively charged electrons scattered throughout.

While this model was eventually disproven, Thomson's discovery of the electron and his work on the measurement of atomic and molecular masses laid the foundation for the modern atomic model. Specifically, Thomson's work on mass spectrometry led to the development of more advanced techniques for determining the masses and properties of atoms and molecules, which are still used in modern research today.

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A process which involves the addition of oxygen is an oxidation reaction and the process which involves the removal of oxygen is a reduction reaction. Here the given reaction is a redox reaction.

The chemical reactions which involves both oxidation and reduction are known as redox reactions. An oxidizing agent is a substance which can accept one or more electrons whereas the reducing agent is a substance which can give one or more electrons.

The given reaction is represented as:

2Al (s) + Cr₂O₃ (s) → 2Cr (s) + Al₂O₃ (s)

The oxidation reaction is:

2Al³⁺ → 2Al + 6e⁻

The reduction reaction is:

2Cr³⁺ + 6e⁻ → 2Cr

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The mass of hydrogen gas produced when 12 grams of zinc reacts with excess sulfuric acid is 0.370 g.

Ratio between the mass and amount of substance (measured in moles) of any sample is called molar mass.

Zn + H2SO4 -> ZnSO4 + H2

Molar mass of zinc is 65.38 g/mol.

moles of zinc is mass of zinc / molar mass of zinc

moles of zinc = 12 g / 65.38 g/mol

moles of zinc = 0.1838 mol

Moles of hydrogen gas is equal to moles of zinc

moles of hydrogen gas = 0.1838 mol

So, mass of hydrogen gas = moles of hydrogen gas x molar mass of hydrogen gas

mass of hydrogen gas = 0.1838 mol x 2.016 g/mol (molar mass of H2)

mass of hydrogen gas = 0.370 g

Therefore, the mass of hydrogen gas produced when 12 grams of zinc reacts with excess sulfuric acid is 0.370 g.

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The correct name for P4Br7 is Tetraphosphorus heptabromide, which results from using prefixes to indicate the numbers of each type of atom present.

The correct name for the compound P4Br7 is D. Tetraphosphorus heptabromide. In chemical naming, the prefix 'tetra-' is used for four of an atom, in this case, phosphorus. Similarly, 'hepta-' is the prefix for seven, referring to the seven bromide atoms present. Therefore the name becomes Tetraphosphorus heptabromide.

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IO2 is C. Iodine dioxide.

Iodine dioxide can be defined  as a chemical compound that is made up of of an  atom of iodine and two atoms of oxygen.

The prefix di- indicates that there are two atoms of oxygen in the compound, and since the oxidation state of iodine in the compound is +4, it is named iodine dioxide.

It is a yellowish-brown solid at room temperature and is used as an oxidizing agent in various chemical reactions.

Therefore the correct option is C.

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6.84 is the pOH of a solution that has a [OH⁻] value 5.8 x 10⁻⁹. The correct option is option B among all the given options.

The concentration of hydroxide ions (OH-) is measured by pOH. It can be employed to express a solution's alkalinity.

Aqueous solutions containing pOH less than 7 at 25 degrees Celsius are alkaline, pOH larger than 7 are acidic, as well as pOH equal to 7 constitute neutral.

pOH = -log[ OH ]

pOH = -log[ 5.8 x 10⁻⁹ ]

        = 5.84

Therefore, 6.84 is the pOH of a solution that has a [OH⁻] value 5.8 x 10⁻⁹. The correct option is option B among all the given options.

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Explanation:

Floods can drastically change the land in an area due to what is known as erosion. Erosion is the process of water carrying away small pieces of rock and soil. Over time, this can lead to large changes in the landscape. Floods can also deposit sediment, which can change the land in a different way. Deposition is the process of sediment being left behind by water. This can cause the land to become higher in some areas and lower in others.

We must first convert the fuel's weight from pounds to grammes because the energy release is specified per gramme. 18143.68 g is the result of multiplying 40 pounds by the weight in grammes per pound.

We must first convert the fuel's weight from pounds to grammes because the energy release is specified per gramme. 18143.68 g is the result of multiplying 40 pounds by the weight in grammes per pound.

The total amount of energy released can then be determined by multiplying the mass of the pellets by the energy release per gramme:

18143.68 g x 742 cal/g equals 13462351.36 cal.

This outcome can be written as follows in scientific notation:

1.3462 x 10^7 cal

As a result, 1.3462 x 107 calories will be produced during the complete combustion of a 40-lb sack of pellets.

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Eons are the current name for the large units of time that make up the geologic time scale. Eons can be further broken down into eras, which are then further broken down into periods.

The evolution of life on Earth is frequently depicted alongside the geologic time scale. It occasionally also refers to significant occurrences on Earth, such as the creation of the world's great mountains or the demise of the dinosaurs.

1. Since fossils revealed similar organisms coexisting on Earth at various periods of time, scientists divided Earth's history into several periods. To keep track of how Earth has changed, they gave each period of time a name.

For instance, the Jurassic period included a large number of dinosaurs. Fossils of the planet's very earliest green vegetation from the Ordovician period have been discovered. European scientists made up a large portion of those who originally gave historical periods on Earth names.

2. During the Precambrian age in earth, multicellular organisms are believed to be evolved. The development of life significantly started at the Precambrian era.

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The bond is a double covalent bond

The bond in the N2 molecule is a  double covalent bond. In a covalent bond, atoms share electrons to fill their outermost valence shells and achieve greater stability.

In the case of the N2 molecule, each nitrogen atom has five valence electrons, and they share three electrons with each other to form a triple covalent bond. This results in a stable N2 molecule, with each nitrogen atom having a full outer shell of eight electrons.

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As per the pictorial representation,the first image is of an element while the second one is that of a mixture of an element and a compound.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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The Lewis dot structure for water is H-O-H. The oxygen atom has a partial negative charge, while the hydrogen atoms have partial positive charges.

Structure is the arrangement of components within a system or object. It is the way in which individual parts are organized to form a whole. Structures can be physical, such as a building, or intangible, such as a system of government or an organization. Structures provide an orderly arrangement of components and help to keep the system functioning properly. By designing structures that are efficient, stable, and able to withstand external forces, engineers and architects are able to create safe and reliable structures.

The Lewis dot structure for ethanol is C-H-O-H. The oxygen atom has a partial negative charge, while the carbon and hydrogen atoms have partial positive charges.

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Answer:What is the main idea of climates

Explanation:

The main idea of climates is that they are long-term patterns of weather conditions in a particular region. Climate is determined by various factors such as latitude, altitude, topography, ocean currents, and prevailing winds. These factors influence the amount of solar radiation received by a region, the distribution of temperature and precipitation, and the types of vegetation and animal life that can thrive in that area.

Climate is typically classified into different types based on temperature and precipitation patterns. The most commonly used classification system is the Köppen climate classification system, which divides climates into five major groups: tropical, dry, temperate, continental, and polar. Each group is further subdivided into more specific climate types based on additional factors such as seasonality and humidity.

Understanding climate is important for a variety of reasons. It helps us predict weather patterns and natural disasters such as hurricanes and droughts. It also plays a critical role in agriculture, water management, and energy production. Additionally, climate change has become an increasingly important topic in recent years as human activities have led to significant changes in global climate patterns.

The atom economy for this reaction to produce nickel is approximately 44%.

What is Percentage Composition?

Percentage composition is a term used in chemistry to describe the percentage by mass of each element in a chemical compound. It is calculated by dividing the mass of each element by the total mass of the compound and multiplying by 100%. For example, the percentage composition of water (H2O) can be calculated by dividing the mass of hydrogen by the total mass of the compound (2 x 1.008 g / 18.015 g) and multiplying by 100%, which gives approximately 11.2%.

To calculate the atom economy, we need to compare the mass of the desired product (Ni) with the total mass of all the reactants.

The molar mass of NiO is 74.71 g/mol, and the molar mass of CO is 28.01 g/mol.

The equation shows that 1 mol of NiO reacts with 1 mol of Ni to produce 1 mol of Ni and 1 mol of CO.

The mass of 1 mol of Ni is 58.69 g.

74.71 g (NiO) + 58.69 g (Ni) = 133.4 g

The mass of the desired product (Ni) is 58.69 g.

Therefore, the percentage atom economy is:

(58.69 g / 133.4 g) x 100% = 44.04%

So the atom economy for this reaction to produce nickel is approximately 44%.

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Answer:

4.20 atm

Explanation:

PV = nRT

convert the temperature from Celsius to Kelvin:

T(K) = T(C) + 273.15

T(K) = 17 + 273.15

T(K) = 290.15 K

plug in the values:

n = 0.4 moles

V = 7.0 L

R = 0.08206 L atm / (mol K) (Gas constant)

T = 290.15 K

PV = nRT

P = nRT / V

P = (0.4 moles) x (0.08206 L atm / (mol K)) x (290.15 K) / (7.0 L)

P = 4.20 atm (rounded to two significant figures)

Therefore, the pressure of the gas is 4.20 atm.

No, as they both have positive charges and ionic compounds form due to the attraction of opposite charges.

In the case given, Na and Zn both have +1 charges. They cannot be compatible for forming an ionic compound. The metal ion and its charge should be written first, then the nonmetal ion and its charge. Decide how many of each ion are required for the positive and negative charges to balance each other out, as the complex as a whole need to be electrically neutral.

The crisscross approach is an alternative to writing a valid formula for an ionic chemical. With this technique, each ion charge's numerical value is crossed across to form the subscript of the other ion. Charges' indicators are removed.

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The statement which best describes a pure substance is that it has constant physical properties which is therefore denoted as option B.

This is referred to as a single kind of matter that cannot be separated into other kinds of matter by any physical means.

This type of sample of matter has both definite and constant composition and distinct chemical properties and is referred to as being homogeneous in nature with no form of impurities which is therefore the reason why it was chosen a the correct choice.

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The percent yield for this reaction is 147.2%.

What is a good percentage yield?

A good percentage yield depends on the specific reaction and the conditions under which it is performed. In general, a high percentage yield (e.g. 90% or higher) is desirable, as it indicates that the reaction is efficient and that little of the starting material was wasted. However, a 100% yield is often not possible in practice due to factors such as incomplete reactions, impurities in the reactants, and loss of product during isolation and purification.

The balanced equation for the electrolysis of MgCl2 is:

2 MgCl2(l) → 2 Mg(l) + Cl2(g)

To calculate the percent yield, we need to first find the theoretical yield of magnesium. This can be calculated using stoichiometry and the given amount of MgCl2:

Molar mass of MgCl2 = 95.211 g/mol

Moles of MgCl2 = 1311 g / 95.211 g/mol = 13.77 mol

From the balanced equation, 2 moles of Mg are produced for every 2 moles of MgCl2.

Therefore, moles of Mg produced = 13.77 mol / 2 = 6.885 mol

Theoretical yield of Mg = 6.885 mol x 24.305 g/mol = 167.38 g

Now we can calculate the percent yield using the actual yield of Mg:

Percent yield = (Actual yield / Theoretical yield) x 100%

Percent yield = (246.43 g / 167.38 g) x 100% = 147.2%

Therefore, the percent yield for this reaction is 147.2%.

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Answer:

In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.

They share electrons between them

Answer:

Calculating the net force on a roller coaster at any time while it is moving requires knowledge of several factors, including the coaster's mass, velocity, acceleration, and the forces acting on it. Here are the general steps to calculate the net force:

Determine the forces acting on the roller coaster: To calculate the net force, you need to know all the forces acting on the coaster. The main forces acting on a roller coaster are gravitational force, normal force, frictional force, and air resistance (if applicable).

Find the direction of each force: You need to determine the direction in which each force is acting. Gravitational force is always acting downwards, normal force acts perpendicular to the surface of the track, and frictional force acts opposite to the direction of motion.

Determine the magnitude of each force: You need to know the magnitude (or strength) of each force acting on the coaster. Gravitational force can be calculated using the equation F = mg, where m is the mass of the coaster and g is the acceleration due to gravity (9.8 m/s^2). Normal force can be calculated using the equation N = mg*cos(theta), where theta is the angle between the coaster's velocity and the horizontal surface of the track. Frictional force can be calculated using the equation F_friction = friction coefficient * N, where friction coefficient is a constant that depends on the materials in contact and N is the normal force.

Determine the direction of motion: You need to know the direction in which the roller coaster is moving. This will be used to determine the direction of the net force acting on the coaster.

Calculate the net force: Once you know the magnitude and direction of each force, you can calculate the net force on the coaster using the equation F_net = ma, where m is the mass of the coaster and a is the acceleration.

Calculate the acceleration: To calculate the acceleration of the roller coaster, you can use the equation a = F_net / m.

Once you have calculated the net force and acceleration of the roller coaster, you can use these values to determine the coaster's speed and position at any given time, using kinematic equations.

Explanation:

The statement "Positive ∆H means that the reaction tends to go forwards. Negative ∆H means that the reaction tends to go in reverse" is generally true.

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The addition of iodide ion (I-) to a solution of silver nitrate (AgNO3) forms a black precipitate of silver iodide (AgI) and nitric acid (HNO3) is formed as a byproduct.

The pink color observed with petroleum ether is due to the formation of AgI complexes with organic compounds present in the petroleum ether. The balanced chemical equation for this reaction is as regards:

2 AgNO₃ + 2 KI → 2 AgI (s) + 2 KNO₃

This equation shows that two moles of silver nitrate (AgNO₃) react with two moles of potassium iodide (KI) to form two moles of silver iodide (AgI) precipitate and two moles of potassium nitrate (KNO₃) in solution.

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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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The friction force is the force that is created when two surfaces move against each other. The gravity force is the force of attraction between the puck and the Earth.

Friction is the force that resists motion when two objects rub against each other. On the ice, the puck is in contact with the ice surface, creating a frictional force between the two surfaces.

Friction: Friction is the force that resists motion when two objects rub against each other. On the ice, the puck is in contact with the ice surface, creating a frictional force between the two surfaces. The frictional force is proportional to the normal force, which is the force that the ice surface exerts on the puck in the direction perpendicular to the surface.

Gravity: The force of gravity is the force that pulls the puck towards the center of the Earth. This force is always present and is directed downwards towards the ground.

Normal: The normal force is the force that the ice exerts on the puck in the direction perpendicular to the surface. This force is a reaction force to the force of gravity and is what prevents the puck from sinking into the ice.

Drag: Drag is the force created by the air resistance from the air molecules surrounding the puck. This force acts in the opposite direction of the puck's velocity, slowing it down. This force increases with the speed of the puck, but is always negligible compared to the other forces acting on the puck.

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The final temperature of the water will be approximately 50.0°C (to two significant figures).

To solve this problem, we need to use the specific heat capacity equation:

q = m * c * ΔT

where

q is the amount of heat energy added,

m is the mass of the water,

c is the specific heat capacity of water, and

ΔT is the change in temperature.

First, we need to determine the initial temperature of the water. We are given that the water is initially at 40.0°C.

Next, we can calculate the amount of heat energy that is added to the water:

q = 418 J

m = 10.0 grams.

c is 4.184 J/g°C.

We can rearrange the equation to solve for ΔT:

ΔT = q / (m * c)

ΔT = 418 J / (10.0 g * 4.184 J/g°C) = 9.99°C

This is the change in temperature of the water. To find the final temperature, we add this to the initial temperature:

Final temperature = 40.0°C + 9.99°C = 49.99°C

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A Lewis base compound has a pair of electrons that are 'donated' to an electron-acceptor forming a covalent bond. A Lewis Base will have lone-pair electrons. All anions are Lewis Bases considering they donate electrons.

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The lone pair on the nitrogen atom is transferred to the hydrogen ion, making the NH3 a Lewis base while the H+ is a Lewis acid.

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BF3 is a Lewis acid, but be aware it has no H to donate, it represents a new type of acids.

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Answer:NH3

Just know I got it wrong so you can get it right

Answer:by brig correct

Explanation:

Answer:

There is attraction between oxygen atom and sodium ion due to their significant electonegative difference so therefore they face each other........

Answer:

25.0 grams of propane (C3H8) reacts with 25.0 grams of oxygen according to the following equation: C3H8 (g) + 5O2 (g) arrow 3CO2 (g) +...

Explanation: