Rotation is the spin of a body on its axis. Revolution is the movement of one body around another in an ellipse-shaped path called an orbit. Earth rotates on its axis and revolves around the Sun. The moon rotates on its axis and revolves around Earth.

Answer:

4

4, because when there is no number after decimal then all the numbers are considered significant even 0 is the last number.

The question is incomplete, the complete question is;

Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the position of the object on the slide.

An object at position has all kinetic energy. A B or C

An object at position has all potential energy. A B or C

An object at position has about half potential energy and half kinetic energy. A B or C

Answer:

An object at position C has all kinetic energy.

An object at position A has all potential energy.

An object at position B has about half potential energy and half kinetic energy.

Explanation:

Lets take a good look at the image.

At position A, the object is stationary and we know that the energy possessed by an an object by virtue of its position is known as potential energy. Hence at A, the energy possessed by the body is all potential.

At position B, the total mechanical energy of the object becomes potential energy + kinetic energy as the object is now in motion.

At position C, the object is still in motion and the energy is all kinetic.

Answer:

C

A

B

Explanation:

Approximately 25.43 grams of carbon dioxide would be required to react with 27.7 grams of LiOH in the given chemical reaction.

To determine the amount of carbon dioxide (CO₂) required to react with 27.7 grams of LiOH in the given chemical reaction, we need to use the stoichiometry of the reaction.

The balanced equation is:

2 LiOH(s) + CO₂(g) → Li₂CO₃(s) + H₂O(l)

From the balanced equation, we can see that the molar ratio between LiOH and CO₂ is 2:1. This means that for every 2 moles of LiOH, we need 1 mole of CO₂.

First, we need to calculate the number of moles of LiOH:

Molar mass of LiOH = 6.941 (Li) + 15.999 (O) + 1.008 (H) = 23.949 g/mol

Moles of LiOH = Mass of LiOH / Molar mass of LiOH = 27.7 g / 23.949 g/mol

Next, we can determine the moles of CO₂ using the mole ratio:

Moles of CO₂ = Moles of LiOH / 2

Finally, we can calculate the mass of CO₂ using the molar mass of CO₂:

Molar mass of CO₂ = 12.011 (C) + 2 * 15.999 (O) = 44.01 g/mol

Mass of CO₂ = Moles of CO₂ * Molar mass of CO₂

By substituting the values into the equations, we find:

Moles of LiOH = 27.7 g / 23.949 g/mol ≈ 1.157 mol

Moles of CO₂ = 1.157 mol / 2 ≈ 0.5785 mol

Mass of CO₂ = 0.5785 mol * 44.01 g/mol ≈ 25.43 g

To know more about carbon dioxide, visit:

https://brainly.com/question/10533331

#SPJ11

For Question 5, the temperature of the mixed air can be calculated using the weighted average method. Taking into account the proportions of the return air and fresh outdoor air, the temperature of the mixed air is approximately 27.2 °C (option C).

For Question 6, the required mass flow rate of the chilled water can be determined using the energy balance equation. By comparing the sensible cooling of the air and the allowable temperature rise of the chilled water, the required mass flow rate of the chilled water is approximately 0.045 kg/s (option B).

Question 5: To find the temperature of the mixed air, we can use the weighted average method. The return air and outdoor air contribute to the mixture in proportion to their percentages. Given that 22% of the mixed air is from outdoor air, the remaining 78% is from the return air. We can calculate the temperature of the mixed air using the weighted average formula: (0.22 × 35°C) + (0.78 × 25°C) = 27.2°C. Therefore, the temperature of the mixed air is approximately 27.2 °C (option C).

Question 6: The energy balance equation for sensible cooling is given by m_air * cp_air * ΔT_air = m_water * cp_water * ΔT_water, where m_air is the mass flow rate of air, cp_air is the specific heat capacity of air, ΔT_air is the temperature change of air, m_water is the mass flow rate of water, cp_water is the specific heat capacity of water, and ΔT_water is the temperature change of water. The temperature change of water is given as 5°C. By rearranging the equation, we can solve for m_water: m_water = (m_air * cp_air * ΔT_air) / (cp_water * ΔT_water). Plugging in the given values, we have m_water = (0.55 kg/s * 1005 J/kg·K * (21°C - 19°C)) / (4186 J/kg·K * 5°C) ≈ 0.045 kg/s. Therefore, the required mass flow rate of the chilled water is approximately 0.045 kg/s (option B).

To learn more about weighted average method: -brainly.com/question/28565969

#SPJ11

The monosaccharides as the D- or the L-isomer are

Monosаcchаrides аre essentiаl аnd simple sugаrs, which contаin only one unit. They cаn be clаssified bаsed on the number of cаrbon аtoms in the molecule. Depending on the direction of their chirаlity centers, eаch of these monosаcchаrides cаn exist in two mirror imаge forms: D- аnd L-isomers.

The D- аnd L-isomers аre used to identify eаch type of isomer. The D-isomer is identicаl to the glycerаldehyde d-isomer, whereаs the L-isomer is identicаl to the glycerаldehyde L-isomer. The three monosаcchаrides are D-Glucose, D-galactose and D-fructose.

Your question is incomplete, but most probably your full question can be seen in the Attachment.

Learn more about monosaccharides:

https://brainly.com/question/27998227

#SPJ11

Answer:

G - H2SO4

Explanation:

two hydrogen atoms and 4 oxygen atoms

The correct answer is Carbon Monoxide (CO). When organic matter is burned with insufficient oxygen, it leads to incomplete combustion and the production of various gases, including carbon monoxide. Carbon monoxide is a colorless, odorless gas that is extremely poisonous and can be fatal in high concentrations.Carbon dioxide (CO2) is a product of complete combustion and is not produced when there is insufficient oxygen.Benzene is a hydrocarbon compound composed of six carbon atoms and six hydrogen atoms, and it is not produced from combustion.Methane (CH4) is a hydrocarbon compound composed of one carbon atom and four hydrogen atoms, and it is not produced from combustion.Mercury is a metallic element and is not related to combustion.

The assumption that the aqueous activity of H4SiO4 is controlled by amorphous silicic acid (am-H4SiO4) rather than by quartz is based on the fact that am-H4SiO4 is more reactive and readily available for dissolution in soils than quartz.

This means that in soils, the concentration of dissolved H4SiO4 is more likely to be controlled by the dissolution of am-H4SiO4 rather than by quartz.

Additionally, the dissolution of quartz requires more energy than the dissolution of am-H4SiO4, making it a slower process.

Therefore, when evaluating the stability of soil silicates and aluminosilicates, the assumption is made that the aqueous activity of H4SiO4 is controlled by am-H4SiO4 rather than by quartz because am-H4SiO4 is more readily available and reactive in soils.

To Know more about aqueous activity, refer here:

https://brainly.com/question/29501908#

#SPJ11

5) Convert molarity to percent, calculate moles of acetic acid, convert moles to grams, divide grams by volume in mL, multiply by 100 to obtain experimental percent, and calculate percent error.

6) Phenolphthalein could have been used as an alternative indicator.

7) When using barium hydroxide instead of sodium hydroxide, adjust the calculations by considering the stoichiometry of the reaction and using a molar ratio of 2:1 between acetic acid and barium hydroxide.

5. To calculate the percent error in the concentration of acetic acid, we need to convert our molarity (M) results to percent (%). Using the average molarity and the average volume (converted to liters) of acetic acid, we can calculate the number of moles of acetic acid.

Then, by converting moles to grams using the molar mass of acetic acid (CH3COOH), we can divide the grams of acetic acid by the average volume (in milliliters) of acetic acid and multiply by 100 to obtain the experimental percent.

Finally, we can calculate the percent error by comparing the experimental percent to the labeled percent (4% vinegar on the bottle).

6. An alternative indicator that could have been used is phenolphthalein. Phenolphthalein is commonly used in acid-base titrations and changes color in a specific pH range, indicating the endpoint of the reaction.

6. If barium hydroxide (Ba(OH)2) were used instead of sodium hydroxide (NaOH), the adjustment in calculations would involve the stoichiometry of the reaction. The balanced chemical equation for the reaction between acetic acid and barium hydroxide is:

2CH3COOH + Ba(OH)2 → Ba(CH3COO)2 + 2H2O

The molar ratio between acetic acid and barium hydroxide is 2:1. Therefore, the number of moles of barium hydroxide used would be half the number of moles of acetic acid in the calculation.

The rest of the procedure, including converting moles to grams and calculating the percent, would remain the same.

For more such questions on molarity visit:

https://brainly.com/question/30404105

#SPJ8

Answer:

B. All of these

Explanation: They are all correct and beneficial

Answer:

B) all of these

all the given options are correct

Answer:

sorry i can't figure out the exact answer but i think it is 2amu if it is wrong again i'm so sorry

Explanation:

Hydrogen has three isotopes, which include hydrogen, deuterium, and tritium with atomic masses of about 1 amu, 2 amu, and 3 amu. Then the average atomic mass will be 2 amu. Thus option b is correct.

Isotopes are defined as a variation of an element that posses same atomic number but different atomic mass.

Isotopes has nearly same chemical behavior by different physical properties.
It can also be defined as the variant of chemical elements that posses same number of protons and electrons but different number of neutrons.

Radioactive isotopes are used in agriculture, food processing, pest control, archaeology and medicines.

Thus, Hydrogen has three isotopes, which include hydrogen, deuterium, and tritium with atomic masses of about 1 amu, 2 amu, and 3 amu. Then the average atomic mass will be 2 amu. Thus option b is correct.

To learn more about isotopes, refer to the link below:

https://brainly.com/question/11680817

#SPJ5

Your question is incomplete but probably your fell question was

Hydrogen has three isotopes, which include hydrogen, deuterium, and tritium with atomic masses of about 1 amu, 2 amu, and 3 amu, respectively. Considering the average atomic mass of hydrogen that appears on the Periodic Table, which statement is correct?

a. 1.5 amu

b. 2 amu

c. 3 amu

d. 1.01 amu

Answer:

C: the repulsion of electrons and electrons.

Explanation:

According to the VSEPR theory, molecular shapes adjust so that the electrons can be as far apart as possible due to electrons repelling each other, which would mean the only possible answer is C.

The specific heat capacity of a substance is the amount of heat needed to elevate it by 1 degree kelvin per gram. The easier it is for something to heat up, then, the smaller the heat capacity. We would suppose that a cook in a hurry would want a pan that heats up more quickly and would choose one with a lesser heat capacity.

0.385 for copper and 0.900 for aluminum.

Despite using non-SI units, we can still compare using it. It is obvious to him that copper has a lower specific heat, so he will pick that.

In case you're curious, you can also approach this issue from the perspective of heat conduction. To do this, look up the thermal conductivities of each material, and then apply Fourier's rule of heat conduction to determine that Copper would be best.

To know more about specific heat visit:-

https://brainly.com/question/11297584

#SPJ1

Answer:

Independent variable

aluminium ball

The first step is to write the combustion reaction of hexane:

Now, we can use Avogadro's Number to find the amount of moles of hexane and O2 that are reacting:

Using the stated reaction we can determine the amount of moles of O2 that react with 0.43 moles of hexane:

From this we can conclude that the limiting reactant is the O2, which means that we have to use the amount of O2 to make the calculations. Use this amount and the stoichiometric ratio of O2 and H2O to find the amount of water produced from 1.16moles of oxygen:

Now, we can use Avogadro's number to convert the amount of moles produced to molecules:

It means that 5.12x10^23 molecules of water are produced.

Answer:

divide the distance by the average

Explanation:

ash QC ok

O2 can only be ionized by light with a maximum wavelength of 99.39 nm.

The ionization energy measures an element's ability to participate in chemical processes that call for the creation of ions or the donation of electrons.

ionization energy of O2 = 1205 kJ

energy = hv

= h × wavelength/speed of light

wavelength = 1205000× 3 ×10⁸ /6.626 ×10³⁴

wavelength = 99.39 nm.

He is symbolized by the highest ionization energy. The outermost shell has a high ionization energy, is stable, and does not frequently become unstable due to electron loss. Ionization can be induced by waves with energies greater than 134 nm. 225nm light lacks the energy to ionize gold because it is greater than 134nm.

To know more about ionization energy, visit:

https://brainly.com/question/28385102

#SPJ4

Answer:

vaporize the liquid water

Explanation:

Since you don't have to heat ice that much to become liquid water, and you    

need it to be like 252 Fahrenheit to vaporize (or evaporate) water, you need the atoms to move a lot more to evaporate water than to melt ice.

If the reactivity order of the four aromatic compounds is not clear from the class data, it would be difficult to determine the reactivity order experimentally.

However, one possible experiment to verify the reactivity of the aromatic compounds would be to perform a series of reactions between the compounds and different reagents and observe the rate of reaction for each compound.

For example, one could perform the following series of reactions:

The rate of reaction for each compound can be determined by measuring the amount of product formed per unit time. The order of reactivity can then be determined by comparing the rate of reaction for each compound with the other compounds in the series.

Learn more about aromatic compounds

https://brainly.com/question/29753641

#SPJ4

The attractive forces between the particles in a liquid determine the equilibrium vapor pressure of the liquid. Explanation: In a liquid, the particles are in constant motion, and they attract each other due to the intermolecular forces. As a result of the attraction forces, a few of the molecules at the surface have enough energy to break free of the liquid's attractive forces and become vapor molecules.

The equilibrium vapor pressure is the pressure exerted by the vapor molecules above the liquid surface in a closed container when the rate of vaporization equals the rate of condensation.

In other words, when the rate of liquid molecules becoming gas is equal to the rate of gas molecules becoming liquid, then a system is said to be at equilibrium.

The liquid will continue to evaporate and condense, but the number of particles in each phase will remain constant in a closed system. The temperature and strength of intermolecular forces in the liquid determine the vapor pressure of a liquid.

Stronger forces will require a higher temperature for evaporation to occur, leading to a lower vapor pressure, while weaker forces will allow for a higher vapor pressure.

Therefore, the stronger the attractive forces between the particles in a liquid, the lower its equilibrium vapor pressure.

To know more about pressure, visit

https://brainly.com/question/28012687

#SPJ11

Answer: in order, cellular respiration, carbon dioxide, agricultural, methane, digestion, volcanic activity, eruption

Explanation:

its hard to explain why these things are thing you will have to memorize at first and then as you get later into science, you will learn about chlorophyll and mitochondria, and all sorts of fun things!

The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an SN2 mechanism. The effect of doubling the concentration of NaN₃ on the rate of the reaction is the rate increases by a factor of 2. The correct answer is C.

The alkyl halide is attacked by the nucleophile as the SN2 mechanism. as a partial bond is formed involving the nucleophile and carbon atom. Halide and carbon's bond partially dissolves. A transition is created where there are five bonds around the carbon atom. The product is created when the leaving group, which is a halide, removes the electrons from the C-X link and departs the molecule.

R-X + Nu⁻ → Nu 

--R--X → Nu-R + X⁻ 

Since a transition state that contains both a nucleophile and a substrate is used for the nucleophilic substitution. It was discovered that the concentration of the substrate and the nucleophile both affect the rate of the reaction.

Rate = k [substrate] [nucleophile]

Since sodium azide is the nucleophilic species and methyl iodide is the substrate,

Rate = k[CH₃I][NaN₃]

both the reactants take part in the reaction and the rate law for the reaction. As a concentration of NaN₃ is doubled, the new rate becomes,

Rate' = k[CH₃I][2 NaN₃]

        = 2 k[CH₃I][NaN₃]

        = 2 Rate

Learn more about SN2 mechanism at https://brainly.com/question/29561608

#SPJ4

Answer: gamma-ray telescopes

Explanation:

this is the answer because the question is asking what telescope must be

placed to observe SHORT-WAVELENGTH radiation. Gamma-rays have very short wave-lengths so therefore it would be gamma-ray telescopes. visible, infrared, and radio all have long wave-lengths, so we can instantly eliminate them.

The Earth's atmosphere is known to be able to blocks all X-rays from space.  telescopes must be places in orbit around Earth in order to observe short-wavelength radiation is gamma-ray telescope.

X-rays is known to have high energy that are in reflecting telescope. Gamma rays from space is commonly blocked by the Earth's atmosphere as the radiation is lethal.

This rays are able too be detected by the optical flashes that they emit when interacting with the material in a particular defined instrument.

Learn more about Gamma-ray telescope from

https://brainly.com/question/279592

Answer:

Flerovium

Explanation:

Answer:

Fl or flerovium. Atomic number is the number above the element on a periodic table.

Answer:

it's rn and the atomic number is 86 if u needed that

Explanation:

:)

Answer:

So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.

Explanation:

The decay rate of the radioisotope on the previous morning at 10 am is 38.7 million decays per second.

The initial mass of the radioisotope is calculated as follows;

N = N₀(¹/₂)^t/h

where;

24 M/s = N₀(¹/₂)^(22/32)

24 M/s = N₀(0.62)

N₀ = (24 M/s)/(0.62)

N₀ = 38.7 M/s

Thus, the decay rate of the radioisotope on the previous morning at 10 am is 38.7 million decays per second.

Learn more about radioisotope here: https://brainly.com/question/18640165

#SPJ1

The correct balanced equation for hydrogen and oxygen reacting to form water is 2H₂ + O₂ ⇒ 2H₂O₂. Therefore, option B is correct.

Chemical equations are symbols and chemical formulas that depict a chemical reaction symbolically. Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations.

The left and right sides of the reaction arrow of a balanced equation have an equal number of each type of atom. The reactants and products are placed on the left and right sides of the arrow, respectively, to create a balanced equation.

Thus, The correct balanced equation for hydrogen and oxygen reacting to form water is 2H₂ + O₂ ⇒ 2H₂O₂. Therefore, option B is correct.

To learn more about balanced equation, follow the link;

https://brainly.com/question/7181548

#SPJ2