Degradates, unlike their parent compounds, are always completely harmless true or false

Answers

Answer 1

Answer:

The correct answer fro above statement is:

False

Explanation:

Some elements in the atmosphere start the body and are consistent when they are dropped. Others are diminishing. Degradation stocks may be more lethal or less virulent than the first chemical. Other chemicals are deposited momentarily in the organs and are discharged shortly after. After a while, most chemicals and degradation stocks are ordered of as body waste, in the stool, urine, sweat and breathed air.

Answer 2

Answer:

Answer:

false

Explanation:

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Dr. Bunsen has a problem—he stored a rack of six bottles filled with clear colorless liquids too close to a heat vent and the labels fell off of each of the bottles. He needs your help in order to correctly identify each of the solutions. Below is a list of the solutions:  Pure DI water  0.10 M AgNO3  0.20 M HCl  0.20 M HNO3  0.20 M KOH  0.50 M NaHCO3 we are provided with ph paper and phenolphthalein

Find the final equilibrium temperature when 15.0 g of milk at 13.0 degrees c is added to 148 g of coffee with a temperature of 88.3 degreesc. assume the specific heats of coffee and milk are the same as for water (c = 4.19 j/g•c), and disregard the heat capacity of the container.

Answers

According to zeroth law of thermodynamics, when two objects are kept in contact, heat (energy) is transferred from one to the other until they reach the same temperature (are in thermal equilibrium). When the objects are at the same temperature there is no heat transfer.

So, at equilibrium, $q_(lost)$ = $q_(gain)$ , $q_(lost)= q_(milk)$ + $q_(coffee)$

q=m×c×T, where q = heat energy, m = mass of a substance, c = specific heat (units J/kg∙K), T is temperature

$q_(lost)= (15X13X4.19)+(148X88.3X4.19), (15+148)X4.19XT_(final)$ =(15X13X4.19)+(148X88.3X4.19)

$T_(final)$ = 81.37 ° C

Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a(1) higher boiling point and a higher freezing point
(2) higher boiling point and a lower freezing point
(3) lower boiling point and a higher freezing point
(4) lower boiling point and a lower freezing point

Answers

The correct answer is option 2. A 0.8 M aqueous solution of NaCl has a higher boiling point and a lower freezing point than a 0.1 M aqueous solution of NaCl. This is explained by the colligative properties of solutions. For the two properties mentioned, the equation for the calculation of the depression and the elevation is expressed as: ΔT = -Km and ΔT = Km, respectively. As we can see, concentration and the change in the property has a direct relationship.

Answer:

(2) higher boiling point and a lower freezing point

Explanation:

Which statement explains why a molecule of CH4 is nonpolar?(1) The bonds between the atoms in a CH4 molecule are polar.
(2) The bonds between the atoms in a CH4 molecule are ionic.
(3) The geometric shape of a CH4 molecule distributes the charges symmetrically.
(4) The geometric shape of a CH4 molecule distributes the charges asymmetrically.

Answers

The answer is the option (3) The geometric shape of a CH4 moleculedistributes the charges geometrically. the CH4 is a tetrahedral with theCarbon atom in the center and the four H atoms in the vertices of thetetrahedral. The C-H bond angles are all identical which makes themolecule perfectly symmetrical and so any dipolar moment will cancelmaking the molecule non polar.

The following statement explains why a molecule of $\text{CH}_4$ is nonpolar:

$\boxed{\left( 3 \right){\text{ The geometric shape of a C}}{{\text{H}}_4}{\text{ molecule distributes the charge symmetrically}}}$ .

Further explanation:

Covalent Bond

This type of bonding takes place when the bonded atoms mutually share electron pairs between them. It is also called the molecule bond. The chemical compounds formed as a result of this bond are called chemical compounds.

The polarity of any bond is primarily governed by two factors; electronegativity difference and symmetry. A bond is said to be polar if the bonded atoms have a considerable molecular bondelectronegativity difference between them. But if there is very small or no electronegativity difference between the bonded atoms, the resulting bond is nonpolar in nature.

Symmetry is another factor responsible for the polarity of the bond. The charge distribution is symmetrical in case symmetry is present in the molecule and as a result, the molecule is said to be nonpolar. But if there is asymmetry in the shape of the molecule, it will be polar in nature.

The electronegativity difference between carbon and hydrogen atoms in $\text{CH}_4$ molecule is very small or negligible so the bonds between the atoms in $\text{CH}_4$ are nonpolar in nature. But the hydrogen atoms are placed in symmetrical positions with respect to the central carbon atom, imparting symmetry to $\text{CH}_4$ molecule and therefore it is nonpolar (For structure, refer to the attached image).

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
Chemical bonds in NaCl: brainly.com/question/5008811

Answer details:

Grade: High School

Chapter: Ionic and covalent compounds

Subject: Chemistry

Keywords: covalent bond, covalent compounds, CH4, carbon, hydrogen, symmetry, electronegativity difference, nonpolar.

What is best way to get salt out of salt water solution

Answers

Answer:

Distillation

Explanation:

In order to turn seawater into freshwater you have to remove the dissolved salt in seawater. That may seem as easy as just boiling some seawater in a pan, capturing the steam and condensing it back into water (distillation).

Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with twelve neutrons 3)25 electrons and 28 neutrons 4)a mass number of 24 and 13 neutrons 5)a titanium atom with 25 neutrons

Answers

Isotopes are elements that differ in the number in neutrons while the numner of protons are the same. The answers of the questions are: 1) 18/8 O 2) 22/10 Ne 3) 53/25 Mn 4) 37/24 Cr 5) 106/81 Ti.

All of the following are abiotic factors in an ecosystem except:Minerals
Soil
Plants
Temperature

Answers

Answer:

The correct answer is ' plants'.

Explanation:

Abiotic factors : These are the non living physical and chemical parts of the environment that effects living organism and the ecosystem.For example: miner;as, soil, temperature, pressure etc.

Biotic factors: These are the living organisms which effects the functioning of the ecosystem and other living beings. For example: plants , animals, microorganism etc.

Final answer:

In an ecosystem, plants are not considered an abiotic factor, but a biotic factor since they are living organisms. Abiotic factors are non-living components such as minerals, soil, and temperature.

Explanation:

In an ecosystem, factors are broken down into two components: abiotic and biotic. Abiotic factors are the non-living components of an ecosystem, which include sunlight, temperature, wind patterns, soil, and minerals. On the other hand, biotic factors are the living components that interact with both the abiotic factors and other biotic factors. Examples of these include plants, animals, fungi, and bacteria.

In your given options, minerals, soil, and temperature are all examples of abiotic factors as they are all non-living components. However, plants are considered biotic factors as they are living organisms that directly interact with both the abiotic and biotic components of the ecosystem. Thus, the answer is plants.

Learn more about Abiotic and Biotic Factors here:

brainly.com/question/12537530

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Which characteristic is a property of molecular substances?(1) good heat conductivity(2) good electrical conductivity(3) low melting point(4) high melting point

A mixture of uneven distribution and easy separation is called. homogeneous a solution heterogeneous a standard

Which element is the most reactive?sodium, nickel, carbon, or oxygen