The atomic notation for a particular atom of boron is ' B. The
atomic number is while the mass number is

All the participants in the Genius Dog Challenge are Border Collies, which some experts believe to be the intelligent breed of dog.

Border Collie is the name of a breed of dog that is characterized by:

Border Collies have physical characteristics such as:

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Answer:

I agree

Explanation:

because the sunlight passes through the atmosphere and is absorbed by earth's surface.

The green house gases in the atmosphere can change the behavior of energy on earth. Thus i agree with this statement.

The green house effect is defined as a process by which the radiations from the sun are absorbed by the green house gases like methane, Chloro fluoro carbons and not reflected back into the space. This makes the surface as insulator and prevents it from freezing.

Due to the increased level of green house gases, the temperature of the earth increases considerably and thereby causes global warming, depletion of ozone layer, smog and air pollution, etc.

It is the natural green house effect which affect the behaviour of heat energy radiated by the sun. The green house gases never let the radiations escape from the earth and increase the surface temperature of earth. This leads to global warming.

Thus green house gases affects the solar energy.

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Answer:

I want to say 10 grams

Explanation:

80 grams is your start

and a half-life is half of that so...

half of 80 ( and or 80/2)

40 grams

then another half is...

half of 40 (and or 40/2)

20 grams

then another half-life is...

half of 20 (and or 20/2)

10 grams

That is 3 half-life of 80 grams

*becareful not to just divide 80 / 3 you will get 26.666 (repeating) that is  incorrect

you want a half of a half of a half

Answer:

623 kgm^-3

Explanation:

Density = Mass/Volume

Mass = 1209 kg

Volume = 1.94 m^3

Density = 1209 / 1.94 kgm^-3

             = 623.1958763 kgm^-3

             = 623 kgm^-3 (3sf)

The label for the activation energy that can be added to the graph below is B. The correct option is C.

The lowest amount of energy that must be absorbed by the reactant molecules in order for their energy to match the threshold energy is known as activation energy.

The activation energy equation is

Ea = E activated complex - E reactant

Finally, since the activation energy is the difference between the energy of the reactants and the activated complex (highest energy point), we can say that the activation energy label would be in the letter B.

Therefore, the correct option is C. B.

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Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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Answer: It is D: All of the listed answers have distinct structures and sets of functions.

Explanation:  Hope this helps

Answer:

d

Explanation:

One career in which it would be important for people to understand the gas laws is chemist.

A chemist is a person who specializes in the science of chemistry, especially at a professional level.

The gas laws are an integral component of chemistry as a subject or course of study. The fundamental gas laws in chemistry are as follows;

These laws explain the interaction of an ideal gas, which is a gas whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container.

Therefore, being a chemist as a career path means understanding the gas laws.

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Answer:

The small bodies from which the planets formed are called planetesimals.

Answer:

Milk's heavy

Explanation:

A sample of gas at 2815 torr is cooled from 150.0 C to 100.0 C. Assuming the volume is constant, 2482.2torr is the pressure in atm of the gas at 100.0 C.

The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure (symbol: p / P). The pressure in relation to the surrounding air pressure is known as gauge pressure, also spelt gauge pressure.

Pressure is expressed using a variety of units. Some of these are calculated by dividing a unit of force by a unit of area; for instance, the metric system's unit of pressure, a pascal (Pa), is equal to one newton / square metre (N/m2).

P₁/T₁=P₂/T₂

2815 ×373/423=2482.2torr

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According to the Foliated Metamorphic Rock Chart slate, phyllite, schist, and gneiss can all have the same parent rock (shale) is a true statement.

Slate, phyllite, schist, and gneiss are all types of metamorphic rocks that can be formed from shale, which is a sedimentary rock composed of clay and other fine-grained minerals. The specific type of metamorphic rock that is formed from shale depends on the conditions under which the shale undergoes metamorphism, including the temperature, pressure, and presence of fluids.

Slate is a fine-grained metamorphic rock with a uniform, flat surface and a layered structure. It is formed when shale undergoes low-grade metamorphism, which occurs at relatively low temperatures and pressures.

Therefore, Gneiss, on the other hand, is a medium- to coarse-grained metamorphic rock with a banded or wavy texture. It is formed when shale undergoes high-grade metamorphism, which occurs at higher temperatures and pressures.

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Answer:

A mole is the amount (10) of material containing 6.02214 × 10 raised to the power of 23 particles.

Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer: gold foil. It's in the experiment's name

The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.

To understand why this is the correct electron configuration, let's break it down step by step:

The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.

The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.

The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².

The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.

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Answer:

its A

Explanation:

The only one that makes sense

Answer:

1.30 g/cm3

Explanation:

d = m/V = 32.4g / 24.9cm3 = 1.30 g/cm3

Answer:

C. Both depend on how much matter an object has.

Explanation:

weight is the gravitational force acting on an object, so it does vary depending on gravity.

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Answer:

Historically, Hardanger employed linen evenweave fabric of 36 count or higher. However, modern Hardanger fabric is an evenweave cotton material woven with pairs of threads, typically 22 pairs per linear inch in both directions, referred to as '22-count'.

We need to determine how is the PH in the given mixtures:

A) A weak base and a strong acid:

Acid and base react to form an acidic solution and, being acidic, this results in a solution with a pH lower than 7

B) A strong base and a strong acid:

When mixing a strong base and a strong acid, neutralization occurs, that is, a neutral pH or equal to 7 is obtained

C) A strong base and acid:

If we have a weak acid, when adding a strong base the pH approaches neutrality without sudden changes, but once the acid has been neutralized, just add a few drops of excess soda to obtain a sudden increase in pH as if there were only base. free. In this case, at the equivalence point the pH> 7

ANSWER:

A) Less than 7

B) Equal to 7

C) Greater than 7

Answer:

causing the particles to move faster and farther apart.

Explanation:

hope this helps

As the kinetic energy possessed by the particles of matter increases and so does the distance, hence particles tend to move faster.

Kinetic energy is "a form of energy that an object or a particle has by reason of its motion".

Particle is "a small portion of matter".

What is matter?

Matter is "anything that occupies space and has mass".

What is distance?

Distance of "an object can be defined as the complete path travelled by an object".

Hence, the kinetic energy of particles of matter increases with the increase in the distance between the particles.

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Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.

Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.

This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.

In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.

Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.

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Answer:

the size of an object changes with a change in temperature.

Explanation:

Answer:i thinks its A

Explanation:but who knows

The correct answer is D. to have eight electrons in their valence shells.

A covalent bond is a chemical relationship that requires the sharing of electrons between atoms to generate electron pairs. These electron couples are known as bonding pairs or sharing pairs.

Covalent bonding is the steady balance of attractive and repulsive forces between atoms when they share electrons.

Covalent Bond Types

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