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Answer:  9.007

Explanation:

Be-8  8 x   0.20%  = 0.016

Be-9 9 x 98.90% =     8.901

Be-10 10 x 0.90%  =        0.09

        100.00%       9.007

The hybridization state of the atom determines its shape in the molecule. C1  is sp2 hybridized and has trigonal planar geometry while C2 is sp3 hybridized and has a tetrahedral geometry.

The shape of a molecule or a moiety in a molecule is determined by the number of electron pairs that are present on the valence shell of the central atom in the molecule.

The hybridization state of the atom also determines the shape of the atom. In the compound, the carbon atom labelled 1 is sp2 hybridized so it will have a trigonal planar geometry. The carbon atom labelled 2 is sp3 hybridized hence it is tetrahedral.

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Answer:

-The ionic solids are hard and brittle because the ions in ionic solids are held in a lattice due to the electrostatic forces of attraction in cations and anions as well as the repulsion with the like charges. ... Because the ionic solids are localized, these solids tend to be stiff and brittle like covalent solids.

Explanation:

Answer:

Gas>Liquid>Solid

Explanation:In a gas state, molecules are allowed to move freelyand  rarely collide into nearby particles. In a liquid state, the molecules are contained within the liquid and occasionally bump into each other. now in a solid state the atoms arrange themselves into a structure that the atoms sit very tightly next to each other, sometimes vibarating

The quantity which determines how two atoms bond is; The difference in their electronegativities.

Ultimately, the difference between the electronegativities of two atoms determines how the atoms bond.

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Explanation:

The nitrogen group is considered mixed because it is composed of elements of equally different classifications of metal, non-metal, and metalloids.  The group contains the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metals bismuth (Bi) and Moscovium (Mc).

In periodic table, metal, nonmetal and metalloids are mixed in group is know to be mixed group. Nitrogen group is mixed.

Define periodic table?

The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number. There are five parts in periodic table Component Groups, Ionic Bonds, element periods, and so forth, ionic bonds and Bonds made of metal.

The nitrogen group is said to be mixed because it is contains metal, nonmetal and metalloids. Elements can be classified into metal, non-metal, and metalloids.  Nitrogen group mixed group contains the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metals bismuth (Bi).

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Answer:

Many organic compounds are very flammable.

Explanation:

Because we do not want to inadvertently ignite chemicals and cause a fire or explosion. Most organic chemicals are incompatible with inorganic chemicals, and certain mixtures can cause violent reactions.

Cell division resulting in two new nuclei having the same number of chromosomes as the

original nucleus is called mitosis

Answer:

C - 2 e- → C

Explanation:

2 NaHCO3 → 2 Na + H2O + -1 CO + 3 CO2

2 NaI + 2 e- → 2 Na0

C - 2e - C

ur so ok.

Explanation:

i need points ok.

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Answer:

gxibdkkzvsosvjzkxvdkbdsibsisbdkbslabdldvslbskskd

Explanation:

please mark me as brainlest

Answer:

depending on the air masses involved and which way the fronts move, fronts can be either warm, cold, stationary, or occluded.

Answer:

it is true

Explanation:

Aeration basins increase the rate of bacteria working to break down the organic matter in wastewater is true.

Aeration basins is defined as the biomass consumes both oxygen and organic pollution, resulting in net microorganism growth and carbon dioxide release.

It can also be defined as the process of introducing air into wastewater in order to allow aerobic bio-degradation of pollutant components.

Aeration is frequently used to reduce the amount of carbon dioxide released by a treatment process.

It is the best methods for waste water treatment .

The main disadvantage of the aeration process is that too much oxygen is absorbed and the water becomes corrosive.

Thus, aeration basins increase the rate of bacteria working to break down the organic matter in wastewater is true.

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Explanation:

Carbon Dioxide is a colorless, odorless, incombustible gas resulting from the oxidation of carbon. Carbon dioxide appears as a colorless odorless gas at atmospheric temperatures and pressures. Heavier than air and may asphyxiate by the displacement of air.

Answer:

cholera and salmonella

Explanation:

i believe so

hope it helps ..............

Considering the definition of ideal gas law,  a pressure of 1.5 atm is required to achieve a CO₂ concentration of 0.0620 mol L⁻¹ at 20°C.

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P×V = n×R×T

So the pressure is calculated as:

[tex]P=\frac{n}{V}xRxT[/tex]

In this case, you know:

Replacing:

P=0.0620 [tex]\frac{mol}{L}[/tex]× 0.082 [tex]\frac{atmL}{molK}[/tex]× 293 K

Solving:

P= 1.489612 atm≅ 1.5 atm

Finally, a pressure of 1.5 atm is required to achieve a CO₂ concentration of 0.0620 mol L⁻¹ at 20°C.

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Answer:

chlorine atom

A chlorine atom has 17 protons, 18 neutrons, and 17 electrons.

Explanation:

Answer:

chlorine atom

Explanation:

A chlorine atom has 17 protons, 18 neutrons, and 17 electrons.

lanuage ? lanuage ? lanuage ?

In cup A, the temperature of the water will drop after 1 hour and the temperature of the aluminium will rise. In cup B, there will be no change in temperature of the water and the aluminium. The type of heat transfer taking is conduction.

When two bodies at different temperatures come into contact which other. Heat is transferred from the hotter body to the cooler body until thermal equilibrium is achieved between the two bodies. The temperature of the water decreases while that of the aluminium bar rises.

The aluminium bars were put into the two cups holding water at 90℃ and 20℃ respectively. Since the water in cup A is at a higher temperature than the aluminium, heat is transferred from the water to the aluminium bar until thermal equilibrium is achieved.

In cup B, there is no temperature difference between the water and aluminum hence no heat transfer occurs. Note that a mode of heat transfer that depends on temperature difference between two bodies in contact is conduction.

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Answer:  In a perfectly isolated system, the total energy is the same.

Explanation:  The conservation laws for mass and energy hold in a system that is isolated from its surroundings.  The enegy released by the dissolution of solid NaOH in water is absorbed by the water.  So the total energy of the syetm remains the same.  It is simply converted from lattice energy of the NaOH into heat energy as measured by the temperature of the water.  As long as it is operfectly isolated, the total energy remains the same.

The chemical formula of aluminium carbonate is written as Al2(CO3)3.

The chemical formula of a compound is a representation of the atoms that compose the compound. Usually, the chemical formula is derived from the name of the compound.

We know that the carbonate ion is CO3^2- while the aluminium ion is Al^3+. It follows that the compound, aluminium carbonate ought to have the formula, Al2(CO3)3. The compound aluminum oxide has the formula Al2O3 while the compound aluminum bicarbonate has the formula Al(HCO3)3.

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Answer:

red because its the flavor

Explanation:

Answer:

Radiation is responsible for most of the heat transferred into the room. Heat transfer also occurs through conduction into the room, but at a much slower rate. Heat transfer by convection also occurs through cold air entering the room around windows and hot air leaving the room by rising up the chimney.

When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises. ... A space heater is a classic convection example.

Answer:

Explanation: the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in. the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.

Answer:

d

Explanation:

because the chemicals or substances mix together so it's basically like chemical bonding.

Answer:

Fe will displace On but no the reaction is not vigorous.