which type of fossils is formed by sediments and found in sedimentary rock

Answer:

Stannic fluoride, SnF4

Explanation:

The chemical formula of Barium nitride is Ba(NO3)2.

The chemical formula of Cobaltous chloride is COCl2.

The chemical formula of Sodium Oxide is Na2O.

So the correct one is stannic fluoride, SnF4.

Answer:

The name and formula is paired correctly for Stannic Fluoride - [tex]SnF_4[/tex]

Explanation:

In this case, we have four names of chemical substances and four formulas. So, we should check each one of those in order to be sure if the name and the formula are paired correctly.

First: Sodium Oxide. The formula for this oxide is [tex]Na_2O[/tex]. The formula paired is NaO. In this case, formula and name are not correctly paired. NaO is not a chemical substance, due to the fact that Oxygen always should have -2 of valence as it was shown in the right formula [tex]Na_2O[/tex]

Second: Cobaltous Chloride. The formula for this Chloride is [tex]CoCl_2[/tex]. The formula paired is [tex]CoCl_3[/tex].

[tex]CoCl_3[/tex] name is Cobaltic Chloride. Taking into account both formula we can mention that formula and name are not correctly paired.

Third: Barium Nitride. The formula for this Nitride is [tex]Ba_3N_2[/tex]. The formula paired is BaN. Formula and name are not correctly paired. BaN is not a chemical substance, Valence of elements are not coherent with the groups in the periodic table.

Finally: Stannic Fluoride. The formula for this Fluoride is [tex]SnF_4[/tex]. The formula paired is [tex]SnF_4[/tex]. So, this is the formula and name correctly paired.  

Answer:

Weathering is the breakdown of rocks into smaller particles called sediment (not sediments)

Mechanical weathering is when rocks are physically broken into smaller pieces, but the minerals in the rock remain the same

When a rock is broken down in a way that changes the mineral composition, it is called Chemical Weathering.

The blanks about Weathering in the question are filled as follows;

According to the question;

For Statement 1:

For Statement 2;

For Statement 3:

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D

Temperature is equivalent to kinetic energy under the collision theory of matter. This shows that losing kinetic energy to the air (a "transfer" of thermal energy) is the same as a decreasing temperature.

Answer:

D

Explanation:

Answer: The benzoic acid is a weak acid.

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

The chemical equation for the reaction of potassium benzoate with water follows:

[tex]C_6H_5COOK+H_2O\rightarrow C_6H_5COOH+KOH[/tex]

Here, benzoate anion is accepting a proton from water and is acting as conjugate base. Water is acting as conjugate acid.

The solution formed is basic solution because of the formation of potassium hydroxide.

When a strong base and weak acid reacts, it leads to the formation of basic solution.

Hence, the benzoic acid is a weak acid.

A conjugate base differs from the forming acid in that it has one additional negative charge and one fewer H atom. It is a material that remains after an acid loses its hydrogen ion. Here benzoic acid is a weak acid. The correct option is C.

Benzoic acid is a weak acid because it is an organic acid. The acid is more potent at higher proton-leaving rates. Because of its resonance structure, benzoic acid has a reduced ability to leave protons, which restricts its proton-leaving potential.

The chemical equation for the reaction of potassium benzoate with water follows:

C₆H₅COOK + H₂O → C₆H₅COOH + KOH

Here, the benzoate anion is accepting a proton from water and is acting as a conjugate base. Water is acting as conjugate acid. When a strong base and weak acid react, it leads to the formation of a basic solution.

Thus the correct option is C.

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Answer:

A double covalent bond.

Explanation:

A double covalent bond forms between two oxygen atoms.

A double covalent bond is when two pairs of electrons are shared between the atom. Usually, there is only one pair, rather than two pairs.

The electrostatic attractive interaction between the same or different elements is called bonds. A nonpolar covalent is formed between two oxygen atoms. Thus, option a is correct.

A chemical bond that involves the mutual sharing of electrons between the outer valence shell of the elemental atom is called a covalent bond. The covalent bonds are of two types namely polar and non-polar.

The polar covalent bond is the unequal sharing of the electrons in the outer shell due to differences in electronegativities. The non-polar covalent bond is formed between the same or different elements in a compound.

In a non-polar covalent bond like two oxygen atoms, the valence electrons are shared equally and have negligible electronegativity differences.

Therefore, option a. two oxygen atoms form a nonpolar covalent.

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Answer:

Explanation:

Such a reaction used to be called a hydrocarbon burning reaction. For example, the burning of gasoline (octane) looks like this.

C8H18 + 13.5 O2  ===> 8CO2 + 9H2O

Answer:

Biodiversity is the variety of life in the world or in a particular habitat or ecosystem.

Explanation:Biodiversity is the shortened form of two words "biological" and "diversity." It refers to all the variety of life that can be found on Earth (plants, animals, fungi and micro-organisms) as well as to the communities that they form and the habitats in which they live.

Final answer:

Biodiversity represents the variety and complexity of life on Earth, encompassing the many species, genetic variations, and ecosystems.

Explanation:

Biodiversity refers to the variety of life and its processes, which includes the diversity of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur. The term encompasses everything from the smallest bacteria to the largest plants and animals.

While scientists have identified about 1.9 million species, it is estimated that the true number of species ranges from 5 to 30 million. This diversity can be measured at three levels: species diversity, genetic diversity, and ecosystem diversity. Biodiversity is essential as it contributes to the resilience of ecosystems and to our planet's overall health.

Answer:

C,D

Explanation:

Answer:

C D

Explanation:

Answer:

Volume = 4.28L

Explanation:

Charles's gas law relates the volume and temperature of a gas at constant pressure. This law says that at constant pressures if we raise the temperature of a gas it will expand and if we reduce the temperature the volume will decrease. The formula is as follows:

[tex] {\displaystyle {\frac {V_{1}}{T_{1}}}={\frac {V_{2}}{T_{2}}}} [/tex]

So, the initial conditions are 2.22L and 23.9 °C ant the final conditions are 46.1 °C we replace them in the equation. And then we solve it.

[tex] {\displaystyle {\frac {2.22}{23.9}}={\frac {V_{2}}{46.1}} [/tex]

[tex] {\displaystyle {\frac {2.22}{23.9}} {46.1}={V_{2} [/tex]

[tex] {\displaystyle {4.28}={V_{2} [/tex]

Final answer:

Using Charles's Law, the new volume of a gas when the temperature is increased from 23.9°C to 46.1°C at constant pressure is calculated to be approximately 2.37 liters.

Explanation:

Calculating Change in Gas Volume Due to Temperature Increase

To calculate the new volume of a gas when the temperature is raised, we can use Charles's Law. This law states that at constant pressure, the volume of a gas is directly proportional to its absolute temperature. We can set up the relationship as follows:

V1/T1 = V2/T2

Where:
V1 = initial volume of the gas
T1 = initial temperature in Kelvins
V2 = final volume of the gas
T2 = final temperature in Kelvins

We can convert the temperatures from Celsius to Kelvin by adding 273.15 to each temperature.

T1 = 23.9 °C + 273.15 = 297.05 K
T2 = 46.1 °C + 273.15 = 319.25 K

Substitute the values into the equation:

2.22 L / 297.05 K = V2 / 319.25 K

Solving for V2, we get:

V2 = (2.22 L * 319.25 K) / 297.05 K

V2 ≈ 2.37 L

The new volume of the gas when the temperature is raised to 46.1°C at constant pressure is approximately 2.37 liters.

Answer:

A molecule is tetrahedral if the central atom has four bonds and no lone pairs. Explanation: ... The electron pairs in the bonds repel the electrons in the other bonds, so they all try to get as far from each other as possible.

According to the molecular geometry,four atoms bound to a central atom with no lone pairs would cause the shape of a molecule to be tetrahedral.

Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.

It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.

They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.

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Answer:

=C₄H₄O₂

Explanation:

Given the empirical formula of a molecule, the he the quotient of the molecular mas and and the empirical mass=constant.

84.0 g/mol/mass of(C₂H₂O)=constant

=84/(12×2+1×2×16)

=84/42

=2

Therefore, the molecular formula is (C₂H₂O)₂=C₄H₄O₂

Answer:

[tex]C_2 H_2 O \times 2=C_4 H_4 O_2[/tex] is the molecular formula

Explanation:

Empirical formula is the simplest form of a Molecular formula.

For example  

Molecular formula of glucose is [tex]C_6 H_{12} O_6[/tex]

Its empirical formula is [tex]C_1 H_2 O_1[/tex]

The subscript numbers of the molecular formula is divided by a common number n=6 here.

Another example:

Molecular formula of Octane is [tex]C_8 H_{18}[/tex] and Its empirical formula will be [tex]C_4 H_9[/tex]  

Subscripts divided by n=2.

To find n we make use of the formula  

[tex]\frac {(molecular mass )}{(empirical formula mass)}=n[/tex]

[tex]= \frac {84.0g}{(C_2H_2O mass)}\\\\=\frac {84.0g}{(24+2+16)g}=\frac {84.0g}{42g}=2[/tex]

So, we see n=2 here

Empirical formula × n = molecular formula

[tex]C_2 H_2 O \times 2=C_4 H_4 O_2[/tex] is the molecular formula

(Answer)

Please note:

Molar mass is the mass of 1 mole of the substance and its unit is g/mol .

n is the number of moles by which the empirical formula is multiplied to get the molecular formula of the compound.

Answer:

oxidation

Explanation:

oxidation number are based on the distribution of electrons in a molecule

Answer:

nobel gass are found atmosphere

Answer:

Noble gases are found as monatomic molecules is a TRUE statement.

Explanation:

Noble gases are monoatomic elements. That is they exist as a single atom in nature.

Noble gases are the only elements which are stable at room temperature and pressure.

Except helium which has 2 valence electrons all other elements have 8 valence electrons (electrons in the outer shell) This is the reason why the noble gases are non reactive that is they are inert in nature.

It is difficult to oxidize or reduce noble gases and hence they form very few compounds.

Answer:

Constant volcanic eruption

Explanation:

Answer:

1+2i

Explanation:

Answer:

1+2i

Explanation:

Let the two complex numbers in the question to be as shown below,

a + bi = 4 − 3i and s + ti = -2 + 7i.

Apply the Midpoint Formula for the 2 complex numbers which are a + bi and s + ti is:

[tex]Midpoint=\frac {a+s}{2}+ \frac {b+t}{2}i[/tex]

Applying values as:

[tex]Midpoint=\frac {4-2}{2}+ \frac {-3+7}{2}i[/tex]

Hence, the midpoint is 1+2i

Answer:

Explanation:

Since the equation is not given, let us write and balance it:

  Reactants: Carbon dioxide (CO₂)

                      Water(H₂O)

 Products: Glucose(C₆H₁₂O₆)

                   Oxygen(O₂)

The reaction equation is shown below:

                  CO₂ + H₂O → C₆H₁₂O₆ + O₂

But the equation is not balanced:

    to balance the equation

          aCO₂ + bH₂O → cC₆H₁₂O₆ + dO₂

  for C:

         a = 6c, if c = 1 then a = 6

  for O:

        2a + b = 6c + 2d

  for H:

       2b = 12c, since c = 1, b = 6

In 2a + b = 6c + 2d, solving for d:

   2(6) + 6 = 6(1) + 2d

      18 = 6 + 2d

         d = 6

Therefore, the balanced equation is:

                       6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Photosynthesis is the process where six molecules of carbon dioxide and six molecules of water combine, using light energy, to produce one molecule of glucose and six molecules of oxygen. This procedure is unique to plant cells and fosters life as we know it on Earth.

The process you're referring to is indeed called photosynthesis and this process happens in cells of plants, which absorb sunlight to carry out this operation. The balanced equation for photosynthesis is written as:

6CO₂ + 6H₂O -------light------> C₆H₁₂O₆ + 6O₂

In other words, this equation reads: Six molecules of carbon dioxide plus six molecules of water, using light energy, produce one molecule of glucose and six molecules of oxygen. This procedure, which can only be completed by plant cells, enhances life on Earth as we know it.

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Answer: 0.4

Explanation: The easiest way to do this is to get a denominator of 10. To do this, multiply each number in 2/5 by 2. You will get the fraction 4/10. With the denominator of 10, the answer would be 0.4 by putting the decimal in front of the number.

Answer : The volume of NaOH stock solution used should be, 250 ml

Solution :

According to the neutralization law,

[tex]M_1V_1=M_2V_2[/tex]

where,

[tex]M_1[/tex] = molarity of NaOH solution = 0.50 M

[tex]V_1[/tex] = volume of NaOH solution = 3.0 L

[tex]M_2[/tex] = molarity of NaOH stock solution = 6.0 M

[tex]V_2[/tex] = volume of NaOH stock solution = ?

Now put all the given values in the above law, we get the volume of NaOH stock solution.

[tex](0.50M)\times (3.0L)=(6.0M)\times V_2[/tex]

[tex]V_2=0.25L=250ml[/tex]       (1 L = 1000 ml)

Therefore, the volume of NaOH stock solution used should be, 250 ml

Answer:

1, 3, 4

Explanation:

Answer:

I just took the lesson

Explanation:

Answer:

Explanation:

She would have about 21,000 back

Answer:

42.5 g

Explanation:

Calculate the mass of the soft drink given the density and volume:

355 mL × 1.04 g/mL = 369.2 g

Now calculate the mass of sucrose given the percentage:

0.115 × 369.2 g = 42.46 g

Rounded to 3 significant figures, the mass is 42.5 g.

Answer:

42.458 g of sucrose is contained in 355 mL (12 oz) of the soft drink

Explanation:

Volume of the soft drink = 355mL

Density = 1.04 g/mL

We know

Density = Mass / Volume

Rearranging the formula  

Mass of soft drink = Density × volume

[tex]=1.04 g/mL \times 355mL=369.2 g[/tex]

[tex]Mass = \frac {(mass of solute)}{(mass of solution )} \times 100%[/tex]

[tex]11.5  = \frac {(mass of solute (sucrose))}{(mass of solution(soft drink) )} \times 100%[/tex]

[tex]11.5  = \frac {(mass of solute (sucrose))}{(369.2 g)} \times 100%[/tex]

So

Mass of sucrose

[tex]=\frac {(11.5 \times 369.2g)}{(100)}[/tex]

= 42.458 g  is the Answer

Answer:

From n=1 to n=2

Explanation:

Electrons in n=1 are strongly attracted to the nucleus and therefore will require great force to overcome the electrostatic force of attraction to displace them from the energy level to another.

The electrostatic force reduces as you progress to the outer energy levels.

Answer:

C. from n = 1 to n = 2

Explanation:

A.

[tex]\Delta E=E_{final}-E_{initial}[/tex]

[tex]\Delta E=-1312[\frac{1}{(n_f^2 )}-\frac {1}{(n_i^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(4^2 )}-\frac {1}{(3^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(16 )}-\frac {1}{(9)}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[0.0625-0.111]KJ mol^{-1}[/tex]

[tex]\Delta E=64 KJ mol^{-1}[/tex]

B.

[tex]\Delta E=E_{final}-E_{initial}[/tex]

[tex]\Delta E=-1312[\frac{1}{(n_f^2 )}-\frac {1}{(n_i^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(3^2 )}-\frac {1}{(2^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(9 )}-\frac {1}{(4)}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[0.111-0.25]KJ mol^{-1}[/tex]

[tex]\Delta E=182 KJ mol^{-1}[/tex]

C.

[tex]\Delta E=E_{final}-E_{initial}[/tex]

[tex]\Delta E=-1312[\frac{1}{(n_f^2 )}-\frac {1}{(n_i^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(2^2 )}-\frac {1}{(1^2 )}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[\frac{1}{(4)}-\frac {1}{(1)}]KJ mol^{-1}[/tex]

[tex]\Delta E=-1312[0.25-1]KJ mol^{-1}[/tex]

[tex]\Delta E=984 KJ mol^{-1}[/tex]

Answer:

Organic

Explanation:

Glucose is an organic compound, as its structure contains atoms of carbon, which are the main constituents of organic molecules. Glucose is specifically a monosaccharide that belongs to the group of carbohydrates, one of the four types of organic molecules.

C6H12O6 is an organic compound because it contains carbon in its structure.

Organic compounds are carbon-based molecules, essential to life and diverse in structure. They include hydrocarbons like methane, functional groups like alcohols, and complex biomolecules such as proteins and DNA. Organic chemistry studies their synthesis, structure, and properties, playing a crucial role in pharmaceuticals, agriculture, and materials science

In the given case C6H12O6 is an organic compound as organic compounds are defined as covalently bonded compounds containing carbon, excluding carbonates and oxides. C6H12O6 is composed of carbon (C), hydrogen (H), and oxygen (O) atoms, making it an organic compound.

The answer is answer choice 3

The part of the engineering process that she is most likely engaged in is identifying a need. Thus, the correct option is D.

Skin cancer may be defined as the circumstance in which there is an uncontrolled growth of abnormal skin cells occur. It causes severe damage to the skin.

After observing the mortality data of last year, scientists identified a need to overcome the threat of a situation that causes a higher number of deaths last year.

Therefore, the correct option for this question is D.

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Final answer:

The scientist noticing an increase in skin cancer deaths is engaged in Identifying a need, the first step of the engineering process where problems are recognized.

Explanation:

If a scientist has noticed a significant increase in the number of deaths related to skin cancer from the previous year, she is most likely engaged in Identifying a need (Option D). This is the first step in the engineering process, where a problem or opportunity is recognized that may need a new or modified technological solution. In the context of this scenario, the identification of the increased skin cancer deaths could lead to a need for improved public health policies, educational programs on sun safety, or the development of better skin protection products.

Answer:

P2 = 778.05 mm Hg = 1.02 atm

Explanation:

We are to find the final pressure (expressed in atm)  of a 3.05 liter system initially at 724 mm hg and 298 K which is compressed to a final volume of 2.60 liter at 273 K.

For this, we would use the equation:

[tex]\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}[/tex]

where P1 = 724 mm hg

V1 = 3.05 L

T1 = 298 K

P2 = ?

V2 = 2.6 L

T2 = 173 K

Substituting the given values in the equation to get:

[tex]\frac{(724)(3.05)}{298} =\frac{P_2(2.6)}{173}[/tex]

P2 = 778.05 mm Hg = 1.02 atm

Answer:

Water

Explanation:

Water molecules are known to have a melting point of 0°C and a boiling point of 100°C.

The melting and boiling points are as a result of the intermolecular force of attraction between the molecules of water. The predominant bond type that dictates the property of the melting and boiling point is the hydrogen bonding. This bond is a strong force of attraction and it impacts on the physical properties of water.

Answer:

Water

Explanation:

The substance that has a melting point at 0 and a boiling point at 100 is water.  Water is the only substance that fits into this category.  According to van.physics.illinois.edu, it states the following "For pure water, the boiling point is 100 degrees Celsius (212 Fahrenheit) at one atmosphere of pressure, and the melting point is 0 degrees Celsius (32 degrees Fahrenheit) at one atmosphere of pressure."

Answer:  Water

Answer:

Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

Explanation:

Final answer:

Nuclear fission is used primarily in nuclear reactors to generate electricity and in nuclear weapons. While it is more environmentally friendly than fossil fuels, it still produces radioactive waste, challenging the perception of it as a zero-waste energy source.

Explanation:

Applications of Fission Reactions

Nuclear fission reactions involve the splitting of a heavy atomic nucleus into two or more lighter nuclei, along with the release of energy and neutrons. This process is not only fundamental in nuclear power plants, where the energy released is harnessed to generate electricity, but also underlies the destructive power of nuclear weapons.

Nuclear reactors use controlled fission reactions to heat water, producing steam that drives turbines to generate electricity. This method of producing power is seen as a more environmentally friendly alternative to fossil fuels, as it does not produce greenhouse gases. Moreover, many countries see the development and application of nuclear technology as critical for ensuring energy security.

However, it is important to note that while nuclear power is seen as a potential solution to global warming, it is not a zero-waste energy source. The spent nuclear fuel and other radioactive waste generated by nuclear reactors pose significant disposal challenges.