What is the relationship between gravity and the size of an object?

Answer:

see explanations

Explanation:

a. The central atom bonded to four substituent atoms and having no lone pair.

This is an AX₄ geometry => tetrahedron

b. The central atom bonded to three substituent atoms and having one lone pair.

This is an AX₃E geometry => pyramidal

c. The central atom bonded to two substituent atoms ảnd having

one lone pair.

This is an AX₂E geometry => bent angular

d. The central atom bonded to two substituent atoms and having no lone pair.

This is an AX₂ geometry => linear

_______________________________

Based upon the VSEPR Theory there are 6 parent geometry configurations and associated derived geometries.

Parent geometries  => Derivatives => Examples

For graphic images of each geometry do an internet search for 'molecular geometry'.

A) Ethanol in water: Distillation.

B) Boiling the mixture of chloride crystals with water: Evaporation.

C) Pure water from muddy water: Filtration.

D) Sodium chloride in water: Evaporation or Crystallization.

E) Sodium carbonate in water: Filtration or Evaporation.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol.

G) Mixture of acetic acid and alcohol: Distillation.

H) Serum from blood sample: Centrifugation.

I) Kerosene from water: Separatory funnel or Decantation.

J) Ammonium chloride in sand: Sublimation or Dissolving in water and Filtration.

A) Ethanol in water: Distillation can be used to separate ethanol from water based on their different boiling points.

B) Boiling the mixture of chloride crystals with water: By heating the mixture, the water will evaporate, leaving behind the chloride crystals.

C) Pure water from muddy water: Filtration can be used to separate the solid particles (mud) from the water.

D) Sodium chloride in water: Evaporation can be used to separate sodium chloride from water by heating the mixture until the water evaporates, leaving behind the salt.

E) Sodium carbonate in water: Filtration can be used to separate solid sodium carbonate from water, similar to muddy water.

F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol or acetone can be used to separate chlorophyll from leaves.

G) Mixture of acetic acid and alcohol: Distillation can be used to separate the mixture based on their different boiling points.

H) Serum from blood sample: Centrifugation can be used to separate the serum, which is the liquid part of blood, from the solid components like cells.

I) Kerosene from water: Separatory funnel or decantation can be used to separate the immiscible liquids by pouring off the top layer (kerosene) from the bottom layer (water).

J) Ammonium chloride in sand: Sublimation can be used to separate ammonium chloride by heating the mixture, causing the ammonium chloride to vaporize and then condense back into solid form in a cooler region, leaving the sand behind.

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the amount of energy required to remove an electron from an isolated atom or molecule.

Answer:

Ionization energy is the energy required to remove electrons from gaseous atoms or ions.

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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The number of gold atoms is 1.590x10^23.

- First, with the molar mass of Au2Cl6 (607g/mol) we can find the grams of Au in 80g of Au2Cl6:

Now we know that there are 51.93g of Au in 80g of Au2Cl6.

- Second, with the molar mass of gold (197g/mol) we can calculate the number of moles in 51.93g of gold:

Now we know that there are 0.264 moles of gold in the sample.

- Third, with the Avogadro's number (6.022*10^23) we can calculate the number of gold atoms in the sample:

So, the number of gold atoms is 1.590x10^23.

In this question, we need to choose the option that represents one of the differences between Carbon and Silicon. Based on the answers, the only possible option will be letter C, because Carbon is located in the 2nd period and Silicon is located in the 3rd period in the periodic table, thus making Carbon to have 1 less electron energy shell than Silicon

Answer will be letter C

The steps required to determine the empirical formula of a compound from the mass % are:

1. Convert the mass percentages of each element to moles using the molar mass formula.

2. Divide the mass percentages among the smallest number to calculate the ratio of atoms of each element present.

3. Ensure that the ratio of atoms of each element is a ratio of integer numbers.

The empirical formula of a compound is the simplest whole number ratio of the elements present in the compound. It is often represented using the symbols of the elements involved and can be calculated from the relative masses of the elements. It is helpful in identifying the composition of a compound. For example, the empirical formula for glucose is CH2O, indicating that there is one carbon atom, two hydrogen atoms, and one oxygen atom present in the compound.

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Calculating relative atomic mass of an element is ordered sequentially as followed:

Part 2:

1. Relative atomic mass of Magnesium =

((23.99 x 0.787) + (24.99 x 0.1013) + (25.98 x 0.1117)) / 100 = 24.31 amu

a) Percentage abundance of silver-109 =

100% - 51.86% = 48.14%

b) Average atomic mass of silver = (106.90509 x 0.5186) + (108.90470 x 0.4814) = 107.8682 amu.

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Answer:

One atom of sulfur has a mass of 32.07 AMU; one mole of S atoms has a mass of 32.07 g.

Explanation:

Therefore, the answer should be 32.07 g

Explanation:

2-metylbutene should be the profuct

Answer:

To determine the identity of metal X, we need to compare the standard reduction potentials of the possible metals with the standard reduction potential of the Mg half-reaction.

From Table 18.1, we can find the standard reduction potentials for each of the metals listed:

Pb: -0.13 V

Zn: -0.76 V

Ni: -0.25 V

Fe: -0.44 V

Mn: -1.18 V

The reduction half-reaction for the Mg electrode is:

Mg2+ + 2e- → Mg E° = -2.37 V

The overall reaction for the galvanic cell is:

Mg(s) + X2+(aq) → Mg2+(aq) + X(s)

The standard cell potential is given by:

E°cell = E°(cathode) - E°(anode)

where the cathode is the reduction half-reaction and the anode is the oxidation half-reaction.

Substituting the given values, we get:

1.61 V = E°(X2+/X) - (-2.37 V)

Simplifying, we get:

E°(X2+/X) = 1.61 V + 2.37 V = 3.98 V

Comparing E°(X2+/X) with the standard reduction potentials in Table 18.1, we see that only zinc (Zn) has a reduction potential that is more negative than 3.98 V. Therefore, the metal X is zinc (Zn).

Therefore, the answer is (b) Zn.

Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

Answer:

X2Y4–6Z8O20 (OH, F)4

Explanation:

The chemical formula for micas is X2Y4–6Z8O20 (OH, F)4, where X is K, Na, or Ca or less commonly Ba, Rb, or Cs; Y is Al, Mg, or Fe or less commonly Mn, Cr, Ti, Li, etc.; Z is chiefly Si or Al, but also may include Fe3+ or Ti1. Structurally, micas can be classed as dioctahedral (Y = 4) and trioctahedral (Y = 6)1.

The chemical formula for micas varies, but they typically have the general formula:

(K,Na,Ba,Rb,Ca)(Al,Mg,Fe)2(Si3Al)O10(OH,F)2

Where:

So in summary, micas have a layered aluminosilicate structure with interlayer cations that can vary, but they are generally characterized by an approximate 3:1 ratio of silicon to aluminum within the silica tetrahedral sheets. The chemical formula given is the generalized structural formula for micas, but the actual compositions can vary based on the specific mica.

The chemical formula for copper(II) sulfate is CuSO4.

Copper(II) sulfate is a chemical compound that is made up of copper, sulfur, and oxygen. It has the chemical formula CuSO4 and is commonly referred to as "blue vitriol" or "bluestone." Copper(II) sulfate can be prepared by reacting copper oxide or copper metal with sulfuric acid. It is a blue-colored crystalline solid that dissolves easily in water.

Copper(II) sulfate has many uses in industry and can be used as a fungicide, herbicide, pesticide, and in the manufacture of other chemicals. It is also commonly used in schools and laboratories as a reagent in chemical reactions and experiments.

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The equilibrium constant for the reaction given that the equilibrium concentration of [PH₃] = 0.250 M, [H₂] = 0.580 M, and [P₄] = 0.750 M is 7.3

From the question given above, the following data were obtained:

The equilibrium constant for the reaction can be obtained as shown below:

Equilibrium constant = [Product]ᵐ / [Reactant]ⁿ

Where

Equilibrium constant = [H₂]⁶[P₄] / [PH₃]⁴

Equilibrium constant = [(0.580)⁶ × 0.750] / (0.250)⁴

Equilibrium constant = 7.3

Thus, the equilibrium constant for the reaction is 7.3

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Answer:

18 minutes is the half life

Answer:

Explanation:

A molecule is a basic unit of a chemical substance made up of two or more atoms that are bonded together. A compound, on the other hand, is a substance made up of two or more different elements that are chemically bonded together.

Every compound is a molecule because it is made up of at least two chemically bonded atoms, but not every molecule is a compound because a molecule can be made up of the same type of atoms and not be a compound.

For example, molecular oxygen (O2) is made up of two oxygen atoms, but it is not a compound because both atoms are the same element. On the other hand, water (H2O) is a compound made up of hydrogen and oxygen atoms.

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Answer:

922.202

Explanation:

4.192+ 913.30+ 4.71 complying with sig figs would be solved like this:

004.192+ 913.300+ 004.710= 922.202

The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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Answer:

I would not accept it.

Explanation:

Although it is tempting to accept the janitor's offer and save the scholarship, which is not easy to get, I would not accept his offer, as I do not believe in victories based on dishonesty and would be heavy on conscience if I did the opposite. Obviously, I would not like to lose my scholarship and for that reason, I would look for other ways that would be honest and help me improve my grade. If I could not improve and lose the scholarship, I would be extremely sad, but I would be at peace with my conscience.

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer: 1.5mol NH3

Explanation: 1N2+3H2= NH3

                      0.5 mol N2x 3NH3/1molN2= 0.5x3= 1.5mol NH3

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

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If heat is going into the system, then energy must have come out from the surroundings.

If heat is entering a system, it means that the system is gaining thermal energy, which can lead to an increase in temperature, changes in state, or other effects depending on the nature of the system and the heat transfer mechanism.

The first law of thermodynamics, also known as the law of conservation of energy, states that the total amount of energy in a closed system remains constant, and energy can neither be created nor destroyed, only transferred or converted from one form to another.

When heat enters a system, it is either used to increase the internal energy of the system or to perform work, such as moving a piston or driving an electrical generator.

The amount of heat transferred to a system can be quantified using the equation Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is its specific heat capacity, and ΔT is the change in temperature.

Therefore, if the system is gaining energy in the form of heat, then the surroundings (the rest of the universe) must be losing that same amount of energy. This is because energy is conserved.

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1. Dependant Variable

2. Scientific Method

3. Data

4. Consistency

5. Metric Balance

6. Mean

7. Technology

8. Dependant Variable

9. Hypothesis

10. Spring Scale

Hello! I hope this helped and please correct me if some are wrong. I did my research and matched them. Have a good one!

Answer:

hope it is helpful to you