How does gravity depend on the mass of the two objects

Answer: 8.754831

Explanation:

Answer: 8. 75 kilometers

Explanation:  5.44x 1.609344= 8.7548 Kilometers

Option (b) K + Br₂  → 2KBr is the chemical reaction that does not follow the law of conservation of mass.

According to the law of conservation of mass or principle of mass conservation in physics and chemistry, any system that is closed to all transfers of matter and energy must have a constant mass over time because the mass of the system cannot change, meaning that neither more nor less of the quantity can be added or taken away.

The Law of Conservation of Mass has been in force ever since Antoine Lavoisier discovered that mass is neither created nor destroyed during chemical reactions. For instance, the carbon atom in coal burns and becomes carbon dioxide. Although the carbon atom's shape changes from solid to gas, its mass remains constant.

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Answer:

Your television produces light energy by transforming electrical energy into light energy.

Explanation:

"Polar" and "ionic" materials will most likely dissolve in water.

The two classes of materials that will dissolve in water are "polar" and "ionic" materials. Polar materials, such as sugar or alcohol, have an uneven distribution of charges, which allows them to interact with water molecules and dissolve. Ionic materials, such as table salt (sodium chloride), consist of positive and negative ions that are attracted to the positive and negative poles of water molecules, leading to their dissolution in water.

In both cases, the ability of a substance to dissolve in water depends on the interactions between the water molecules and the molecules or ions of the substance. Water's polarity and its ability to form hydrogen bonds make it an excellent solvent for many polar and ionic substances.

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Answer:

b.

Explanation:

As the ozone layer is essential for nullifying the rays of the sun, without it there would be much more UV radiation.

The probability that both employees selected are men is 11/60 or approximately 0.1833.

To find the probability that both employees selected are men, we need to consider the total number of possible outcomes and the number of favorable outcomes.

Total number of employees = 14 women + 11 men = 25 employees

First, we select one employee, and the probability of selecting a man on the first draw is given by:

P(First draw is a man) = Number of men / Total number of employees

= 11 / 25

After the first draw, there are 10 men left out of 24 remaining employees. So, the probability of selecting a second man is:

P(Second draw is a man) = Number of men remaining / Total number of remaining employees

= 10 / 24

Since the two draws are independent events, we can multiply the probabilities:

P(Both employees selected are men) = P(First draw is a man) * P(Second draw is a man)

= (11/25) * (10/24)

= 110 / 600

= 11 / 60

Therefore, the probability that both employees selected are men is 11/60, or approximately 0.1833, which can be expressed as 18.33% or 18.33 out of 100.

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The empirical formula = the molecular formula = C₁₀H₂₀O

Given

m =  0.15 g menthol

V = 0.0337 L

T = 150 +273 = 423 K

P = 100.2 kPa =0.99 atm

Required

molar mass

The molecular formula

Solution

Ideal gas law :

PV=nRT

n=PV/RT

n=0.99 x 0.0337/0.082 x 423

n=9.6 x 10⁻⁴

n =  mass/Molar mass

Molar mass = mass/n

Molar mass = 0.15/9.6 x 10⁻⁴

Molar mass = 156.25 g/mol

The empirical formula of Menthol : C₁₀H₂₀O

(The empirical formula)n= molecular formula

(C₁₀H₂₀O)n=156.25

(12.011.10+1,007.20+15,999)n=156.25

(156.25)n=156.25

n=1

Answer:

There are seven periods in the modern periodic table.

Answer:

Seven periods

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Answer:

A single bond between two atoms corresponds to the sharing of one pair of electrons. Two hydrogen atoms can then form a molecule, held together by the shaped pair of electrons. Each H atom now has the Noble gas electron configuration of helium ( He). The pair of shared electrons forms a single covalent bond.

When an unknown compound with the formula \(K_XCl_YO_Z\). Given that a 100 g sample of the compound is comprised of 24.75g K, 44.88g Cl and 30.37g O and has a molar mass of 316 g/mol than the empirical formula is: \(K_2Cl_4O_6\)

To determine the empirical formula, we need to find the simplest whole-number ratio of the atoms in the compound. We can do this by converting the given masses to moles and finding the smallest mole ratio.

Moles of K = 24.75 g / 39.10 g/mol = 0.632 mol

Moles of Cl = 44.88 g / 35.45 g/mol = 1.265 mol

Moles of O = 30.37 g / 16.00 g/mol = 1.898 mol

Dividing each value by the smallest number of moles (0.632) gives the following mole ratios:

K:Cl:O = 1.000 : 2.002 : 3.000

The ratio of K:Cl:O is not a whole number, so we need to multiply each by the same integer to obtain whole numbers. Multiplying each by 2 gives:

K:Cl:O = 2 : 4 : 6

This is the empirical formula of the compound.

To determine the molecular formula, we need to know the molar mass of the compound. The given molar mass is 316 g/mol, and the empirical formula mass is:

2(K) + 4(Cl) + 6(O) = 174 g/mol

Dividing the molar mass by the empirical formula mass gives:

316 g/mol ÷ 174 g/mol = 1.816

Rounding to the nearest integer, the molecular formula is: \(K_2Cl_4O_6\)

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Answer: It can affect the shape of sediment because it is scraping very slowly against it causing it to change,

Explanation:

Answer:

D) 1:2

Explanation:

In the case of the equilibrium reaction provided, if the concentration of Co(H2O)2+ is increased, the reaction will shift to the right in order to consume the excess Co(H2O)2+ and produce more CoCl2 and H2O.

Conversely, if the concentration of CoCl2 is increased, the reaction will shift to the left in order to consume the excess CoCl2 and produce more Co(H2O)2+ and Cl- ions.

According to Le Chatelier's principle, a change in concentration of one or more of the reactants or products of a chemical reaction at equilibrium will cause a shift in the equilibrium position to counteract the change and re-establish equilibrium.

Specifically, if the concentration of one of the reactants is increased, the reaction will shift in the direction that consumes that reactant in order to restore equilibrium.

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Answer:

a (F < C < Li)

b (Li < Na < K)

c (Ge < P < O)

d (C < N < Al)

e (Ga < Cl < Al)

One mole of  C₁₀H₈ contains the largest number of atoms ( option 4 )

First step : Determine the number  of atoms in each mole of the given elements

8 atoms of sulphur

∴Total atoms = 8 atoms

2 atom of Chlorine

∴ Total atoms = 2 atoms

2 atoms of Al

3 atoms of sulphur

12 atoms of oxygen

∴ Total = 17 atoms in one mole of AI₂(S0₄)₃

10 atoms of Carbon

8 atoms of hydrogen

Total atoms = 18 atoms

3 atoms of sodium

1 atom of P

4 atoms of Oxygen

Total atoms = 8 atoms

Hence we can conclude that One mole of  C₁₀H₈ contains the largest number of atoms in the set of elements listed.

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Answer:

Oxygen is composed of three isotopes: oxygen-16, oxygen-17 and oxygen-18 and has an average atomic mass of 15.9980 amu. Oxygen-17 has a mass of 16.992 amu and makes up 0.035% of oxygen. Oxygen-16 has a mass of 15.982 amu and Oxygen-18 has a mass of 17.984 amu.

The quantum numbers for the electron removed to form the Cu²⁺ ion are: n=4, l=1, ml=-1, ms=+1/2.

When a copper atom (Cu) loses one electron to form the Cu²⁺ ion, we can determine the quantum numbers of the removed electron based on the rules governing electron configurations.

The principal quantum number (n) represents the energy level of the electron. In this case, the electron is being removed from a copper atom, which has an electron configuration of [Ar] 3d¹⁰ 4s¹. Since the electron is being removed from the 4s orbital, the principal quantum number is n=4.

The azimuthal quantum number (l) specifies the orbital shape. The 4s orbital has l=0, and the 3d orbital has l=2. Since the electron being removed is from the 4s orbital, the azimuthal quantum number is l=0.

The magnetic quantum number (ml) determines the orientation of the orbital. Since the 4s orbital has only one orientation, ml can be either -1 or +1. In this case, ml=-1.

The spin quantum number (ms) describes the spin state of the electron. It can be either +1/2 or -1/2. The removed electron has a spin state of +1/2.

Therefore, the quantum numbers for the electron removed to form the Cu²⁺ ion are n=4, l=1, ml=-1, and ms=+1/2.

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When one astronaut exhales 825 L of CO₂ every day, about 582 g of water will be created.

One mole of a material weighs one molar mass. The standard unit of measurement is grams per mole (g/mol). The atomic weights of the atoms in a molecule or the formula weight of a compound are added up to determine the molar mass.

Chemical equation that is not balanced:

CO₂ + LiOH = H₂O + Li₂CO₃

The number of atoms of each element must be equal on both sides of the equation for the equation to be balanced:

CO₂ + 2LiOH = Li₂CO₃ + H₂O

According to this equation, two molecules of LiOH and one molecule each of H₂O and Li₂CO₃ are created when one molecule of CO₂ combines with them.

The atomic masses of the constituent elements in a compound must be added, multiplied by the number of atoms of each element, to determine the compound's molar mass.

The molar masses of LiOH are 23.95 g/mol (6.94 g/mol for lithium + 1.01 g/mol for hydrogen + 16.00 g/mol for oxygen) and 44.01 g/mol (12.01 g/mol for carbon + 2 x 16.00 g/mol for oxygen) respectively.

We must first determine how many moles of CO₂ are created by utilizing the ideal gas law and the volume of the gas in order to determine the quantity of water produced:

PV = nRT

where, P denotes the gas pressure, which is believed to be 1 atm, V is the gas's volume (825 L), The number of moles of the gas is n.

The ideal gas constant = R = 0.0821 L atm/mol K.

T is the gas's temperature in kelvin; it is believed that 25 °C is equivalent to 298 K.

n = PV/RT

= [(1 atm x (825 L)] ÷ [(0.0821·L atm/mol·K) x (298 K)]

= 32.3 mol CO₂

We can see from the balanced chemical equation that 1 mole of water is created for every mole of CO₂ that reacts. This means that 32.3 mol of CO₂ will result in 32.3 mol of water.

18.02 g/mol (2 x 1.01 g/mol for hydrogen + 16.00 g/mol for oxygen) is the molar mass of water. As a result, the amount of water generated is:

Mass= number of moles × molar mass

      = 32.3 mol × 18.02 g/mol

       = 582 g.

Therefore, when one astronaut exhales roughly 825 L of CO₂ every day, about 582 g of water will be created.

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Answer:

+2

Explanation:

Oxidation number of an element, also called its oxidation state, is the number of electrons its atoms lost or gain in the process of forming a chemical compound.

To determine the oxidation state of an element or compound;

- The sum of all the oxidation numbers in a neutral compound must equal zero (0).

In the compound: Fe2(CO3)2

This compound is a neutral one, hence, its oxidation state is equal to zero (0).

It contains a polyatomic ion (carbonate ion) i.e. CO3 2-, whose net charge is -2.

Hence, to find the oxidation number of Iron (Fe), which is represented by X, in the compound, we say;

X(2) + -2(2) = 0

2X + -4 = 0

2X - 4 = 0

2X = 4

X = +2

Therefore, the oxidation number of Fe in Fe2(CO3)2 is (+2)

The compound Fe2(CO3)2 is called Iron (II) carbonate

Oxidation number of Fe in \(\rm Fe_2(CO_3)_2\) is 2. An atom's oxidation number is a positive or negative number.

A notion used in chemistry to characterise the relative electron distribution and the level of oxidation or reduction of atoms in a compound or ion is known as the "oxidation number," sometimes known as the "oxidation state." Based on the presumption that electrons in chemical bonds are entirely transmitted to the more electronegative atom, it is a method of bookkeeping that assigns a notional charge to each individual atom in a molecule or ion.

The -4 stands for the overall charge that the carbonate ions provided, and the x is the Fe's oxidation number.

2x + (-4) = 0

2x - 4 = 0

2x = 4

x = 4/2

x = 2

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For an FCC crystal: calculate the density of atoms (atoms/a² where a is the lattice constant) for the (100), (110) and (111) planesThe unit cell of a FCC crystal is shown below:Here, each corner atom contributes 1 atom, and each face atom contributes 1/2 atoms.

For (100) plane:Length of unit cell along (100) plane direction = a Density of atoms = No. of atoms / Area of the plane Area of the plane = a²Density of atoms for (100) plane = 4 / a²For (110) plane:Length of unit cell along (110) plane direction = a√2Density of atoms = No. of atoms / Area of the plane Area of the plane = a x a√2Density of atoms for (110) plane = 2 x 2 / (a x a√2) = 4√2 / a²

For (111) plane:Length of unit cell along (111) plane direction = a√3Density of atoms = No. of atoms / Area of the plane Area of the plane = a²√3/2 Density of atoms for (111) plane = 3 x 4 / (a²√3) = 4√3 / a²Hence, the density of atoms for the (100), (110) and (111) planes in an FCC crystal are as follows:For (100) plane: 4 / a²For (110) plane: 4√2 / a²For (111) plane: 4√3 / a².

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Answer:

3.28

Explanation:

At some point it is best to write out an equation to cancel out the units you don't want and to get to the units that you do want.  So if you write this out in an equation, you can see how you get to the answer.

43 m           3.28 ft             ?  ft

--------   X    -----------  =   --------------

   1                  1 m                  1

You can see now that the meters on the top will cancel out the meters on the bottom so all you are left with is the feet unit.  When you write out the equation you put the unit on the bottom that you want to get rid of (meter).  You put the unit you want to get to on the top which is feet.   At this point you just have to know how many feet 1 meter is equal to and plug those number in.  1 meter is equal to 3.28 feet.

Metals may be easily molded and bent without breaking because they are malleable and ductile.

By comparing their physical and chemical characteristics, metals and non-metals may be easily identified from one another.

Metals effectively conduct heat and electricity.

Metals often react with water and acids to create basic solutions, and they also produce positive ions in an aqueous solution, according to their chemical characteristics.

Contrarily, non-metals are neither ductile nor malleable, and they have low conductivity for both heat and electricity.

When they interact with water or acids, they can also produce neutral or acidic solutions, as well as negative ions in aqueous solutions.

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Answer:

The mole and atonmicity of both the gases are different, the number of atoms is not same.

Explanation:

The number of atoms in a molecule (compound) depends on mole number and atomicity.

↬ Mole of 100 g H₂ = 100g ÷ 2u = 50 mole

∴Number of atoms in 100 g H₂

= 2 x 50 x 6.022 × 10²³

= 6.022 x 10²⁴ atoms

↬ Mole of 100 g He = 100g ÷ 4u = 25 mole

∴ Number of atoms in 100 g He

= 1 × 25 × 6.022 × 10²³

= 150.55 × 10²³

= 1.5055 x 10²⁵ atoms

Thus, The mole and atonmicity of both the gases are different, the number of atoms is not same.

-TheUnknownScientist 72

First, determine the number of moles of CH3CO2H required to react with 0.50 moles of NaHCO3. The balanced chemical equation is:CH3CO2H(aq) + NaHCO3(s) → CO2(g) + H2O(l) + NaCH3CO2(aq)From the equation, it is evident that one mole of CH3CO2H reacts with one mole of NaHCO3.

Therefore,0.50 moles of NaHCO3 will react with 0.50 moles of CH3CO2H.Now, we can calculate the volume of 0.10 M CH3CO2H required to react with 0.50 moles of NaHCO3 by using the formula: Mo l e s = C o n c e n t r a t i o n × V o l u m e 1000⇒ V o l u m e = M o l e s × 1000 C o n c e n t r a t i o n.

Hence, Volume of 0.10 M CH3CO2H = (0.50 × 1000) / 0.10= 5000 / 10= 500 mL= 0.50 L Therefore, the volume of 0.10 M CH3CO2H required to react with 0.50 moles of NaHCO3 is 0.50 L.

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Answer:

8.02

Explanation:

When 60.0 g of carbon is burned in 160.0 g of oxygen, 220.0 g of carbon dioxide is formed. 60.0 g mass of carbon dioxide is formed when 60.0 g of carbon is burned in 750.0g of oxygen.

To solve this problem, we can use the concept of stoichiometry and the balanced chemical equation for the combustion of carbon to form carbon dioxide. The balanced equation is as follows:

C + O₂ → CO₂

According to the equation, one mole of carbon reacts with one mole of oxygen to produce one mole of carbon dioxide.

Calculate the number of moles of carbon and oxygen in the given scenario:

Molar mass of carbon (C) = 12.01 g/mol

Molar mass of oxygen (O₂) = 32.00 g/mol (16.00 g/mol × 2)

Number of moles of carbon = Mass of carbon / Molar mass of carbon

Number of moles of carbon = 60.0 g / 12.01 g/mol = 4.998 mol (rounded to three decimal places)

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

Number of moles of oxygen = 750.0 g / 32.00 g/mol = 23.438 mol (rounded to three decimal places)

Since the balanced equation shows a 1:1 ratio between carbon and carbon dioxide, we can infer that 4.998 moles of carbon will produce 4.998 moles of carbon dioxide.

Now, using the molar mass of carbon dioxide (44.01 g/mol), we can calculate the mass of carbon dioxide produced:

Mass of carbon dioxide = Number of moles of carbon dioxide × Molar mass of carbon dioxide

Mass of carbon dioxide = 4.998 mol × 44.01 g/mol = 219.92 g (rounded to two decimal places)

Therefore, when 60.0 g of carbon is burned in 750.0 g of oxygen, approximately 219.92 g of carbon dioxide is formed.

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Answer:

It is Double Replacment

Explanation:

They traded bonds.

Balanced Equation is 2AgNO3 + CaCl2 = 2 AgCl +1Ca(NO3)2