* If you found a fossil like the one pictured above in an open grassy field, what could you infer about this particular part of Earth
during much earlier times?
Earth's earlier environment in this particular area was covered with water.
Earth's earlier environment in this particular area was most likely a deep
canyon
Earth's earlier environment in this particular area was frozen like the
ground coverings of a tundra.
Earth's earlier environment in this particular area was also similar to the
open, grassy field you see today.

Answer:

60 J

Explanation:

The law of conservation of energy states that energy is neither created nor destroyed, just converted into different forms. This means the total mechanical energy of the object at point A will be the same as the total mechanical energy at point B, and the question tells us the total of that mechanical energy is 150 J. Note we are assuming no energy is lost from the system as heat.

At point B, if the potential energy is 90 J, the remainder of the 150 J total must be kinetic energy. KE = 150 J - 90 J = 60 J.

The kinetic energy of the object at point B is 60 J. This is calculated by subtracting the potential energy at point B from the total mechanical energy, because total mechanical energy, the sum of kinetic and potential energy, remains conserved.

This question deals with the concept of mechanical energy, which in physics is the sum of kinetic energy and potential energy. In this case, the total mechanical energy of the object is given as 150 Joules. At point A, the kinetic energy is 30 J and the potential energy is 120 J, adding up to the total mechanical energy.

At point B, the potential energy is stated to be 90 J. Because the total mechanical energy is conserved (i.e. it does not change between point A and point B), we can subtract the potential energy at point B from the total mechanical energy to find the kinetic energy at point B.

So, the kinetic energy at point B can be calculated using the equation: Kinetic energy = Total mechanical energy - Potential energy = 150 J - 90 J = 60 J.

https://brainly.com/question/34112071

#SPJ2

Answer:

Wind is caused by differences of pressure in the Earth's atmosphere. Air from a high pressure area will move towards an area of low pressure. High winds are caused when air moves between areas with large differences in air pressure.

Explanation:

Wind is the movement of air. When the sun heats one part of the atmosphere differently than another, wind forms. This causes warmer air to expand, resulting in less pressure where it is warmer than where it is cooler.

Wind is the movement of air caused by the sun's uneven heating of the Earth and the rotation of the Earth itself. Winds range from gentle breezes to natural disasters like hurricanes and tornadoes.

Air will move from a high pressure area to a low pressure area. High winds occur when air moves between areas with significant differences in air pressure.

Wind is the movement of air from a high pressure area to a low pressure area.

Thus, Wind is caused by pressure differences in the Earth's atmosphere.

To learn more about the wind, follow the link;

https://brainly.com/question/12005342

#SPJ6

Answer:

The answer to your question is Ferns

Explanation:

Ferns are called nonflowering plants and produce spores instead of seeds.

Answer: The number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

Explanation : Given,

Mass of [tex]O_2[/tex] = 14.9 g

Molar mass of [tex]O_2[/tex] = 32 g/mol

First we have to calculate the moles of [tex]O_2[/tex]

[tex]\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}[/tex]

[tex]\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol[/tex]

Now we have to calculate the moles of [tex]CO_2[/tex]

The balanced chemical equation is:

[tex]2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2[/tex]

From the reaction, we conclude that

As, 13 mole of [tex]O_2[/tex] react to give 8 moles of [tex]CO_2[/tex]

So, 0.466 mole of [tex]O_2[/tex] react to give [tex]\frac{8}{13}\times 0.466=0.287[/tex] mole of [tex]CO_2[/tex]

Therefore, the number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles.

Explanation:

In water the following process undergoes to show water's ability to dissolve substances.

Dissociation is the process in which an ionic compound breaks into  cations and anions

Hydration is the process in which water surrounds the broken cations and anions.

In Dissolving process elements in water breaks down and surrounds respective individual molecules or particles.

Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles. This is most likely because of the strong attractive forces between water and solute particles as water is a polar molecule.

Answer:

6 oxygen atoms

Explanation:

From the equation,

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

From the reactant (left hand side) we have 2 moles of Fe(OH)₃ having (2 * 3 = 6) atoms of oxygen and decomposed to give Fe₂O₃ which contains 3 atoms of oxygen and 3 moles of water that also contains 3 atoms of oxygen.

Since the number of oxygen participating in the reaction is independent on the product (not a reversible reaction) then the total number of oxygen atoms participating in the reaction is 6

Final answer:

In the reaction 2Fe(OH)3 — Fe2O3 + 3H2O, there are a total of 6 oxygen atoms involved, with 6 on both the reactants' side and the products' side, indicating that the equation is balanced.

Explanation:

The chemical reaction in question is: 2Fe(OH)3 — Fe2O3 + 3H2O. To determine the number of oxygen atoms involved in this reaction, we can inspect the chemical formulae of the reactants and products.

On the left side of the equation, we have 2 moles of Fe(OH)3. Each molecule of Fe(OH)3 contains 3 oxygen atoms, thus in 2 molecules there are 2 × 3 = 6 oxygen atoms.

On the right side, we have 1 mole of Fe2O3 and 3 moles of H2O. Fe2O3 contains 3 oxygen atoms and each H2O molecule contains 1 oxygen atom. Therefore, on the right side, we have 3 + 3 × 1 = 6 oxygen atoms.

The reaction is balanced with an equal number of oxygen atoms on both sides of the equation, confirming that 6 oxygen atoms are involved in the chemical reaction.

Answer:

230.3 kJ

Some chemical reactions show release of heat while some show absorption of heat. On these bases, the reaction is classified as either endothermic or exothermic. Negative sign of ΔH means exothermic reaction.

Final answer:

For 2.25 mol of H₂O₂, the total energy released is approximately -0.509175 kilojoules per Kelvin, based on the enthalpy change of -226.3 J/K per mole of H₂O₂.

Explanation:

The student has asked, "How many kilojoules are released when 2.25 mol of H₂O₂ reacts?" To answer this question, we need to look at the thermochemical equation given for the decomposition of hydrogen peroxide (H₂O₂) and calculate the enthalpy change for the given amount of moles.

Using the information provided, we know that -226.3 J/K is released per mole of H₂O₂. To find out the total amount of energy released for 2.25 mol, we perform the following calculation:

Energy released = -226.3 J/K × 2.25 mol = -509.175 J/K = -0.509175 kJ/K (since 1 kJ = 1000 J)

Thus, when 2.25 mol of H₂O₂ react, approximately -0.509175 kilojoules per Kelvin are released.

Answer:

temperature

Explanation:

it is not composed of atoms or molecules

In the context of chemistry, matter is anything that has mass and occupies space. Among the given options, temperature cannot be classified as matter as it does not have mass or volume but is a measure of the average kinetic energy of particles.

In the context of chemistry, matter refers to anything that has mass and occupies space. Among the given choices, air, fog, and oxygen molecule - they all have mass and occupy space, hence they can be classified as matter. On the other hand, temperature is not a form of matter. It is a measure of the average kinetic energy of the particles in a system and does not have mass or volume.

https://brainly.com/question/34699081

#SPJ11

Answer:

The answer is c

5.33 Liters is the volume of 15.2 grams of SO2 at STP.

Explanation:

If the mass of the gas, then you can divide the mass by the molecular weight of the gas molecules to get the number of moles. Then multiply this by 22.4 Liters / mole to get the volume.

PV = nRT => The Ideal Gas Law.

Each unit occurs three times and the cube root yields L-atm / mol-K, the correct units for R when used in a gas law context.

PV / nT = R. or  PV = nRT.

R is called the gas constant.

PV = nRT => V = nRT/P

n = moles SO₂ = 15.2g/64g·mol⁻¹ = 0.238 mole

R = Gas Constant = 0.08206 L·atm/mol·K

T = Kelvin Temp = 273K at STP

P = pressure in atmospheres = 1.0 atm at STP

∴ V = (0.238mol)(0.08206 L·atm/mol·K)(273K)/(1.0atm)

=> 5.33 Liters SO₂.

Answer:

i think its a

Explanation:

The genotypes of each square for the freckles trait are A: dominant,  B: recessive, C: dominant and D: recessive.

The Punnett square is a diagram used in genetics to determine the allele and phenotypic proportions in the offspring.

In conclusion, the genotypes of each square for the freckles trait are A: dominant,  B: recessive, C: dominant and D: recessive.

Learn more in:

https://brainly.com/question/3522181

#SPJ2

Answer:

endergonic reaction.

Explanation:

an endergonic reaction requires energy to be driven.

Answer: 52.39%

Explanation:

Just did on edg.

The percent by mass of carbon dioxide in sodium bicarbonate is 52.38%.

Percentage by mass is a way of representation of concentration of an element in a compound  or that of component of a mixture. It is calculated as mass of component divided by total mass of the mixture and then multiplied by 100.  

In this example, mass of carbon dioxide=44 gram and that of sodium bicarbonate is 84 grams

To find the percent mass of carbon dioxide  mass of carbon dioxide is divided by mass of sodium bicarbonate which is then multiplied by 100. That is, 44/84×100=52.38%.

In this method , the concentration is expressed in terms of mass percent.It describes the component in a particular mixture. It represents mass of solute present in given mass of solution.

It is expressed in mass or in moles and is referred to as percent by weight .

Learn more about mass percent,here:

https://brainly.com/question/14990953

#SPJ2

Answer:

14.65 mL

Explanation:

First figure out the formula which will be...

V2 = P1V1T2/P2T1

Next, put our numbers into the formula. We should get...

V2 = 710 x 14.8 x 293 / 284 x 740

Do the math and you should get 14.65 mL

- Hope this helps! If you need a more in-depth explanation let me know. Once you learn the basics it will become easy.

To solve this problem, we use the combined gas law and re-arrange it to solve for the final volume (V2). After substituting the given values and performing the calculation, the new volume of the gas at 20.0°C and 740 mm Hg is found to be approximately 14.00 mL.

The subject of this problem is applying the combined gas law, which states that the ratio of the product of pressure and volume to temperature remains constant: P1V1 / T1 = P2V2 / T2. Let's convert all the temperatures to Kelvin (absolute temperature) first: T1 = 11.0 °C + 273.15 = 284.15 K and T2 = 20.0 °C + 273.15 = 293.15 K. The pressures are already in the same units (mm Hg), so we don't need to convert those.

We can re-arrange the formula to solve for V2: V2 = (P1V1T2) / (T1P2).

Substituting the values into the formula gives V2 = (710 mm Hg * 14.8 mL * 293.15 K) / (284.15 K * 740 mm Hg). After calculation, V2 comes out to be approximately 13.9933 mL, which can be rounded to 14.00 mL for the sake of significant figures.

https://brainly.com/question/30458409

#SPJ2

Answer:

Insulation creates a barrier to heat gain and loss in ceilings, roofs, floors, and walls. It is a cost-effective and practical way to keep your house warmer in winter and cooler in summer. It may also reduce condensation, decreasing your chances of damp and mold.

Explanation:

Wall insulation helps keep a house warm by reducing heat conduction, with materials having a high R value that resist heat transfer. Double-paned windows use air's low conductivity to prevent heat loss, and materials like mineral wool and polystyrene trap air to keep energy inside the building, making insulation effective for maintaining home temperatures.

Insulation in walls helps keep a house warm on a cold day by reducing the conduction of heat from inside to outside. Materials like fiberglass, cellulose, and foam have a high R value, which determines their effectiveness at suppressing heat transfer. The higher the R value, the greater the material's resistance to heat transfer. During cold weather, insulation limits heat from escaping the home, and double-paned windows prevent convection through the air gap, taking advantage of air's low conductivity for better insulation.

Insulation materials like mineral wool and polystyrene are effective because they trap air within their structure, which minimizes heat loss since air is a poor conductor and a good insulator. These insulation methods are essential for energy-efficient homes, as they require less energy for heating, making them cost-effective and environmentally friendly. Properly insulating your home not only keeps it warm in winter but also cool in summer, showing the versatility of insulation.

Final answer:

The question asks to balance the chemical equation for the reaction of C2H6O with O2 to produce CO2 and H2O. The balanced equation is 2C2H6O + 7O2 → 4CO2 + 6H2O.

Explanation:

The question is about balancing the chemical equation C2H6O + O2 = CO2 + H2O, which involves finding the correct coefficients to ensure that the number of atoms for each element is the same on both sides of the equation.

To correctly balance the equation, we start by balancing the carbons (C) and hydrogens (H), then adjust the oxygens (O2). After determining that adjusting with simple integers leads to an imbalance due to an odd number of oxygen atoms, the equation is scaled up to balance all elements with integer coefficients.

The balanced equation is: 2C2H6O + 7O2 → 4CO2 + 6H2O.

Answer:

i think it is molecules.

Explanation:

Answer:

d

Explanation:

a) This is not an equation.

b) This is not an equation.

c) The reactant side has 1 Na and 2 O while the product side has 2 Na and 2 O, therefore it is not balanced

d) The reactant side has 4 H and 4 O and the product side has 4 H and 4 O, therefore it is balanced.

The polarity of a molecule like O3 or NH3 is determined by its molecular geometry and the electronegativity of its atoms. O3 with its bent shape has a molecular dipole, and NH3 has a molecular dipole pointing from H towards the more electronegative N.

Predicting the polarity of molecules involves understanding their molecular geometry, electronegativity of atoms, and bond dipoles. For O3 (ozone), the molecule has a bent geometry, resulting in an overall molecular dipole due to the uneven distribution of electron density. The bond dipoles do not cancel each other out because of this bent structure.

In NH3, the nitrogen atom is more electronegative than the hydrogen atoms, resulting in bond dipoles pointing towards nitrogen. The geometry of NH3 is trigonal pyramidal, which means the bond dipoles do not cancel, and there is an overall molecular dipole pointing away from the hydrogens and towards the nitrogen.

By using the molecule polarity simulation, one can visualize these molecular structures and confirm the direction of dipoles. Remember to always draw the Lewis structure and use VSEPR theory to determine the molecule's geometry before predicting its polarity.

Answer:

Yes, this hypothesis is true. The ancestor of whale belongs to amphibians.

Explanation:

Amphibians are those organisms which has the ability to live both on land and water. Wales are evolved from land animals such as ungulates. Ungulates are those organisms which belongs to mammals and having hooves. For example, deer, cow, horse and zebra etc. The ancestor of whale lives on land 50 million years ago. So the hypothesis is true.

Answer:had four legs of equal length

Explanation:

Answer:

B. Algae can grow in extreme conditions and provide food for many different organisms.

Explanation:

pioneer species are harden species that are first to colonize a barren environment or previously existing ecosystem that has been disrupted by earth natural phenomenon like volcanism etc.

Pioneer species are the first to colonize an ecosystem that has been previously damaged or disturbed because of there ability to grow in extreme condition. Example is the colonization of an environment that has been formed from lava flow .  This species can withstand a disturbed or damaged habitat. Examples of pioneer species are lichen, Algae etc.

The pioneer species are photosynthetic as the new habitat will have limited nutrient and largely expose to light energy to hasten photosynthesis. This organism when they die will provide  the organic material for further higher level of colonization.  Further more the mode of reproduction is usually asexual for most of these organisms.

Ionic bonding typically occurs between a metal that loses electrons (such as sodium) and a nonmetal that gains electrons (like chlorine), forming a compound such as sodium chloride.

Ionic bonding often occurs between a metal and a nonmetal because of their tendencies to lose and gain electrons, respectively. Metals tend to lose electrons and become positively charged ions, while nonmetals tend to gain electrons and become negatively charged ions. An example of such an ionic bond is the bond between sodium (Na), a metal that easily loses one electron to form Na⁺, and chlorine (Cl), a nonmetal that readily gains an electron to form Cl⁻.

The resulting compound, sodium chloride (NaCl), or table salt, is a classic example of ionic bonding; it is held together by the electrostatic attraction between the positively charged sodium and the negatively charged chloride ions.

This bonding forms a crystalline lattice that is neutral overall but consists of ions with opposite charges that are strongly attracted to each other.

Answer:

An intermediate phenotype between the homozygous genotypes parents.

Explanation:

Dominance in genetics, refers to the phenomenon in which one variant (allele) of a gene on a chromosome masks or overrides the effect of the other variant of the same gene on the other copy of the chromosome.

Different kinds of dominance include; complete dominance, incomplete dominance, and co-dominance.

Incomplete dominance occurs when the phenotype of the heterozygous genotype appears different from the phenotypes of the homozygous genotypes and it is often intermediate.

For example, when a cross between an RR with an rr yields an Rr, we have an incomplete dominance.

Living things  are  interdependent with each other  and the  environment.

Explanation:

Living things to grow, thrive, survive and reproduce are interdependent on each other and their surrounding environment. They depend on each other and the environment for basic requirements which support life like water, air, food etc.

The food cycle starting with the producers, consumers, decomposers and their interdependence with each other for energy production is a clear example for this.  They are dependent on each other for reproduction and growth. They are dependent on the environment for living in their habitat and for raw materials for producing food.

Answer:

You can dissolve about 1g of chloroform in a 100g of water; slightly less if the water is hot. This would not generally be considered 'soluble', but it's not entirely negligible either, depending on your purposes. chloroform is insoluble in water since it does not have any hydrophillic groups.

hope this helps you uwu

Answer:

9 moles of the reactant form 8 moles of the product

Explanation:

The number in front of an alement or compound in a chemical equation is the number of moles. If there isn't a number...just know that the number of moles is 1

PLEASE MAKE ME BRAINLIEST

Answer:

5 moles

Explanation:

CaO+H20--> Ca(OH)2

mass 280 90 370g

RFM 56 18 74

moles 5 5 5

Final answer:

To produce 370g of calcium hydroxide, 4.99 moles of CaO are required, based on the molar mass of Ca(OH)2 (74.1 g/mol) and the stoichiometry of the reaction CaO + H2O → Ca(OH)2.

Explanation:

To determine how many moles of CaO are needed to react with excess water to produce 370g of calcium hydroxide (Ca(OH)2), we will use the molar mass of Ca(OH)2 and a balanced chemical equation. First, let's calculate the moles of calcium hydroxide:
Molar mass of Ca(OH)2 = 74.1 g/mol
Mass of Ca(OH)2 = 370 g

Using the formula moles = mass ÷ molar mass, we find:

Moles of Ca(OH)2 = 370 g ÷ 74.1 g/mol = 4.99 mol

Now, looking at the balanced chemical equation for the reaction of calcium oxide with water:

CaO + H2O → Ca(OH)2

According to the equation, 1 mole of CaO reacts to produce 1 mole of Ca(OH)2. Therefore, 4.99 moles of CaO are needed to produce 370 g (which is equivalent to 4.99 moles) of calcium hydroxide.

Answer:

Im pretty sure it would be 23

Explanation:

If it divide asexually it would be identical

Answer:

B. An acid-base reaction that leaves no excess H" or OH

Explanation:

a chemical process in which an acid and a base combine to produce salt and water as residues. H+ ions and OH- ions combine to generate water during a neutralisation process

Final answer:

A neutralization reaction is an acid-base reaction in which an acid reacts with a base to produce salt and water, and there is no excess H+ or OH- left in the solution. So the correct option is B.

Explanation:

A neutralization reaction is a specific type of acid-base reaction where an acid reacts with a base to produce salt and water. For instance, when hydrochloric acid (HCl) is mixed with sodium hydroxide (NaOH), the resulting products are sodium chloride (NaCl), which is a salt, and water (H2O). This reaction can be represented by the chemical equation:
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

After removing the spectator ions, the net ionic equation for a neutralization reaction is:
H+ (aq) + OH−(aq) → H2O(l)

This shows that the essence of a neutralization reaction is the combination of hydronium ions (H+) from the acid with hydroxide ions (OH−) from the base to form water. Therefore, the correct answer to the student's question is:

B. An acid-base reaction that leaves no excess H+ or OH−