Explain how inertia and gravity combine to keep earth on its orbit

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a. Autotrophic

Answer:

ok:

Explanation:

We have:

\(q = mc\Delta T\)

we know that q = -5000 J (it is negative since you release energy)

m = 320 g

and c = 376 J/kg.

We need to be careful before plugging them in. Since the units are J/kg for c, but we are talking about grams for m, we need to convert. I will just divide c by 1000  to get c = 0.376 J/g

We can now plug in:

(-5000 J) = (320 g) * (0.376 J/g) * \(\Delta T\)

We can solve that \(\Delta T\) = -41.5555

So the final temperature is \(T - \Delta T\) which equals around 8.4°C.

Answer:

Magnesium sulfide | MgS - PubChem.

Answer:

Potassium nitrate (KNO3) crystals were insoluble in water at room temperature. Heating the solution increases the solubility of the crystals in water

Potassium nitrate (KNO3) crystals were insoluble in water at room temperature. Heating the solution increases the solubility of the crystals in water.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

50 Meters North

Explanation:

Displacement is the distance/direction from the start point to

the ending point, regardless of which route you took from the start to the end.

So, you would simply subtract:

1,500 meters North- 1,450 meters South= 50 meters North

The correct formula equation for the reaction between lead (II) nitrate and potassium iodide is:

Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)

This is a double displacement reaction where the lead (II) cation (Pb2+) from lead (II) nitrate switches places with the iodide ion (I-) from potassium iodide to form solid lead iodide (PbI2) and aqueous potassium nitrate (KNO3).

It's important to note that lead (II) nitrate and potassium iodide are both soluble in water and dissociate into their respective ions (Pb2+, NO3-, K+, and I-) when mixed. However, when these ions combine, they form an insoluble compound (PbI2) that precipitates out of the solution, causing a visible color change.

This reaction can also be used to test for the presence of either lead (II) or iodide ions in a solution. If precipitate forms when lead (II) nitrate and potassium iodide are mixed, it indicates the presence of both ions in the solution. If no precipitate forms, it means that neither lead (II) nor iodide ions are present.

It's important to handle lead (II) nitrate with care as it is toxic and can cause harm if ingested or inhaled. Similarly, potassium iodide can be harmful in large doses and should be used with caution.

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we write the empirical formula using the mole ratios as subscripts: Empirical formula of Calcocite = Cu2STherefore, the empirical formula for Calcocite is Cu2S.

Calcocite is a mineral composed of 79.9 mass % copper and 20.1 mass % sulfur. To determine the empirical formula for Calcocite, we must first determine the mole ratios of copper and sulfur in the mineral.

Here's how: Step-by-step explanation:

We assume a 100 g sample of Calcocite.

Then, the mass of copper in the sample is 79.9 g (79.9 mass % of 100 g) and the mass of sulfur in the sample is 20.1 g (20.1 mass % of 100 g).Next, we find the moles of copper and sulfur using their atomic masses:

Moles of copper = 79.9 g / 63.55 g/mol (atomic mass of copper)

= 1.257 moles Moles of sulfur

= 20.1 g / 32.06 g/mol (atomic mass of sulfur)

= 0.626 moles

Then, we divide each mole value by the smallest mole value to get the simplest whole-number ratio of moles:

Moles of copper / Smallest mole value

= 1.257 / 0.626

= 2.007 Moles of sulfur / Smallest mole value

= 0.626 / 0.626

= 1.000 (Note that we rounded off the mole ratio of copper to two decimal places, which may introduce some errors in our calculation.

However, we will use this rounded value to make our empirical formula easier to write.)

Finally, we write the empirical formula using the mole ratios as subscripts: Empirical formula of Calcocite = Cu2STherefore, the empirical formula for Calcocite is Cu2S.

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The weight-average molecular weight (Mw) for a molecule of isoprene with a weight-average degree of polymerization (DP) of 500 is 34,065 g/mol.

For the weight-average molecular weight (Mw) for a molecule of isoprene (C5H8) with a weight-average degree of polymerization (DP) of 500, we need to consider the molecular weight of the repeating unit and the number of repeating units in the polymer chain.

The molecular weight of isoprene (C5H8) is calculated as follows:

The molecular weight of C5H8 = \((5 \times atomic weight of carbon) + (8 \times atomic weight of hydrogen)\)

                      = \(\((5 \times 12.01 \, \text{g/mol}) + (8 \times 1.01 \, \text{g/mol})\)\)

                      = 60.05 g/mol + 8.08 g/mol

                      = 68.13 g/mol

Now, we can calculate the weight-average molecular weight (Mw) using the formula:

Mw = \(DP \times Molar\) mass of repeating unit

The molar mass of repeating unit = molecular weight of isoprene = 68.13 g/mol

DP = 500

Mw =\(500 \times 68.13 g/mol\)

Mw = 34,065 g/mol

Thus, the weight-average molecular weight (Mw) for a molecule of isoprene with a weight-average degree of polymerization (DP) of 500 is 34,065 g/mol.

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If a 280.0 ml sample of water is heated to its boiling point then the heat that is required to vaporize it is 632.8 kJ.

The volume of water is: V = 280.0mL

The density of water is: ρ = 1.00g/mL

Write the expression for the mass of the water.

m = ρ V

Substitute the known values.

m = (1.00g/mL) (280.0mL) = 280.0g = 0.280 kg

Write the expression for the heat required to vaporize the water.

Q = m ΔHvap

Here, the heat of vaporization of water is

ΔHvap ≈ 2260kJ/kg.

Substitute the values to get the value of Q,

Q = 0.280 kg × 2260kJ/kg

⇒ Q = 632.8 kJ

Hence, when a 280.0 ml sample of water is heated to its boiling point then the heat that is required to vaporize it is 632.8 kJ.

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10.8 moles are present in 6.5 × 10²⁴ atoms of Barium (Ba). Details on how to calculate number of moles can be found below.

The number of moles of a substance can be calculated by dividing the number of atoms in the substance by Avogadro's number.

According to this question, 6.5 × 10²⁴ atoms of Ba are present, the number of moles is calculated thus:

no of moles = 6.5 × 10²⁴ ÷ 6.02 × 10²³

no of moles = 1.08 × 10¹

no of moles = 10.8moles

Therefore, 10.8 moles are present in 6.5 × 10²⁴ atoms of Barium (Ba).

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The salt that produces the solution with the highest pH when dissolved in water is KF (Potassium Fluoride).The correct answer is b.

KF has a strong basic character and so it produces a highly basic solution. LiClO4 (Lithium Perchlorate), KHSO4 (Potassium Hydrogen Sulfate), Li3PO4 (Lithium Phosphate) and BaO (Barium Oxide) are all relatively weakly acidic and so produce solutions with lower pH.

The negative logarithm of the hydrogen ion concentration in a water-based solution is called pH. It represents the acidity or alkalinity of the solution. On a scale of 1 to 14, pH ranges from 0 to 14. The solutions with pH values less than 7 are acidic, those with pH values greater than 7 are alkaline, and those with pH values equal to 7 are neutral.

Salts are compounds made up of cations and anions that are ionically bonded. When they dissolve in water, they dissociate into their constituent ions. As a result, the pH of the solution may be affected. In the given salts, KF produces the solution with the highest pH when dissolved in water.

When dissolved in water, the pH of the solution is influenced by the salt.The negative logarithm of the hydrogen ion concentration in a water-based solution is called pH.pH represents the acidity or alkalinity of the solution.

Salts are compounds made up of cations and anions that are ionically bonded.KF produces the solution with the highest pH when dissolved in water.

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A molecule with the chemical formula \(C_3H_6Br_2\) generally has three different types of hydrogen atoms, each of which produces a unique signal in the 1H NMR spectrum.

We can count the distinct hydrogen environments because the presence of bromine atoms does not divide the hydrogen signals.

Three carbon atoms, denoted as \(C_1\), \(C_2\), and \(C_3\), make up the molecule. Different signals will be produced as a result of the hydrogens linked to each carbon atom having various chemical surroundings. The splitting of the hydrogen signals is unaffected by the two bromine atoms as well.

Consequently, we can anticipate seeing three signals in the 1H NMR spectrum of the molecule \(C_3H_6Br_2\).

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--The complete Question is, How many signals are present in the 1H NMR spectrum of the molecule with the chemical formula C3H6Br2?--

Answer:

The nucleus

Explanation:

Answer:

12.9L

Explanation:

V1 = 8.5L

P1 = 3.5

P2 = 2.3

V2 = ?

P1 V1 = P2 V2 ( Boyle's law )

3.5×8.5 = 2.3×V2

Divide both sides by 2.3

3.5×8.5/2.3 = 2.3×V2/2.3

V2 = 29.5/2.3

=12.9L

The original volume of HBr that was titrated can be calculated as the ratio of the moles of HBr to its concentration.

To determine the original volume of HBr that was titrated, we can use the concept of stoichiometry and the equation balanced for the neutralization reaction between HBr and KOH.

The balanced equation is:

HBr + KOH → KBr + H₂O

From the balanced equation, we can see that the stoichiometric ratio between HBr and KOH is 1:1. This means that for every mole of HBr, we need an equal number of moles of KOH to complete neutralization.

First, let's determine the moles of KOH used in the titration:

Moles of KOH = 0.500 M × 0.075 L = 0.0375 mol

Since the stoichiometric ratio is 1:1, this also represents the number of moles of HBr that were neutralized.

Now, we can calculate the original volume of HBr using the concentration of the unknown solution:

Moles of HBr = 0.0375 mol

Concentration of HBr = unknown (let's assume it is C mol/L)

Volume of HBr = Moles of HBr / Concentration of HBr = 0.0375 mol / C mol/L

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Answer:

Explanation:

hope it helps

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First Chair Conformation:

           H

          / \

     H -- C   C -- H

    /     |   |     \

  H       C---C       H

   \     /     \     /

     H - C       C - H

        |       |

        H       H

Second Chair Conformation:

            H

           / \

      H -- C   C -- H

     /     |   |     \

   H       C---C       H

    \     /     \     /

      H - C       C - H

         |       |

         H       H

To decide the two chair conformations of trans-1-ethyl-4-isopropylcyclohexane, one has to begin with have to be distinguish the positions of the ethyl and isopropyl bunches on the cyclohexane ring.

The trans-1-ethyl-4-isopropylcyclohexane particle contains a cyclohexane ring with two substituents: an ethyl gather (-CH₂CH₃) and an isopropyl gather (-CH(CH₃)₂).

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Answer:

Iron(III) sulfate (AKA Fe2(SO4)3)

Explanation:

Answer:

The correct answer is

Explanation:

Answer: Galena

Explanation:

(A). Galena

An unidentified mineral that is softer than calcite, exhibits a metallic luster and cubic cleavage. This mineral most likely is galena.

Talc, Gypsum, Calcite, Fluorite, Apatite, Feldspar, Quartz, Topaz, Corundum, and Diamond are just a few examples. - The "Mohs Scale of Mineral Hardness" lists common minerals in order of relative hardness, with talc being the softest and diamond being the hardest mineral. This scale should be familiar to rock hounds and earth science students alike.

When newly broken, galena is a metallic lead grey with a brilliant metallic shine; as it ages, it turns dark grey or black. It is incredibly hefty and fragile (about 7.6 times as heavy as water). Galena often crystallizes in cubic crystals and cleaves into flawless cubic pieces.

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(a) Thermal decomposition

(b) Crystallisation

Thermal decomposition : It is a chemical decomposition caused by heat energy

Cystallisation : It is a process in which the solution is evaporated and a salt is formed and the salt is then supercooled to form pure crystals

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Explanation:

your answer is Kelvin because it is the SI unit of temperature

In future purification procedures, adjusting the pH and using different column matrices could be effective in sharpening peak 2 like peak 1.

Peak 1 appears to be sharper than peak 2, which could indicate differences in the physical properties of the molecules being separated or differences in the purification protocol. Adjusting the pH of the mobile phase or buffer system could affect the retention time and selectivity of the column, potentially leading to sharper peaks.

Additionally, using a different column matrix with a higher resolution could improve peak separation and sharpen the peaks. It may also be helpful to optimize the sample preparation or injection volume to ensure the highest possible resolution. Overall, it is important to carefully evaluate and troubleshoot the purification protocol to identify potential areas for improvement in order to obtain sharper and more accurate separation of the target molecules.

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Answer:

0.534mg..

....

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.

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X is the chemical symbol of the element

Answer:

there is none

Explanation:

your thinking of the symbol for chemical symbol for the element

The molar mass of BH3 is 13.84, so the number of hydrogen atoms in 14.32 grams of BH3 is 3.104 grams.

Explanation:

1 atom of B

3 atom of H

So grams of  BH₃ = 14.32 gram

To find the mass of hydrogen ,use the molar mass of  BH₃;

Molar mass of hydrogen  = 1 g/mol

Molar mass of boron = 10.8

molar mass of BH₃ 13.84

Mass of hydrogen  = 1 × 3/13.84 x 14.32

= 3.104

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The molar mass of BH3 is 13.84, so the number of hydrogen atoms in 14.32 grams of BH3 is 3.104 grams.

In chemistry, the ratio of mass to weight of the compound is called the molar mass of a compound.

The molar mass M of a compound is calculated by dividing its mass by the number of moles of substance involved.

Expressed as MB = m/nB. where m is the total mass of the pure substance sample and nB is the molecular weight of substance B

In chemistry, the molar mass of a  compound is defined as the ratio between the mass  of any sample and the molar amount of that compound.

Molar mass is a mass property, not a molecular property of matter.

Molar mass is the mass (g) of a particular chemical element or  compound  divided by the amount (mol) of the substance.

The molar mass of a compound can be calculated by adding the standard atomic masses (g/mol) of the constituent atoms.

1 atom of B

3 atom of H

So grams of  BH₃ = 14.32 gram

To find the mass of hydrogen ,use the molar mass of  BH₃;

Molar mass of hydrogen  = 1 g/mol

Molar mass of boron = 10.8

molar mass of BH₃ 13.84

Mass of hydrogen  = 1 × 3/13.84 x 14.32

= 3.104

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To tell a Cu(NO3)2 solution from a Ni(NO3)2 solution, you can add KI to the solution. If the solution contains Cu(NO3)2, the brown precipitate will be formed, but if the solution contains Ni(NO3)2, no precipitate will be formed.

This is the best way to distinguish between these two solutions, since adding KOH or Na2C2O4 will result in blueish precipitates, being harder to identify if it is Cu(NO3)2 or Ni(NO3)2 and with Na2SO4 no reaction will happen.

It means that the answer is: By adding KI and seeing if a brown precipitate is formed.