How do we measure the distance?

Answer:

18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury

Explanation:

Mercury oxide has molar mass of 216.6 g/ mol. It gas a molecular formula of HgO.

The decomposition of mercury oxide is given by the chemical equation below:

2HgO ----> 2Hg + O₂

2 moles of HgO decomposes to produce 1 mole of Hg

2 moles of HgO has a mass of 433.2 g

433.2 g of HgO produces 216.6 g of Hg

18.0 of HgO will produce 18 × 216.6/433.2 g of Hg = 9.0 g of Hg

Therefore, 18.0 g of mercury (11) oxide decomposes to produce 9.0 grams of mercury

A smaller amount of energy is wasted by the incandescent bulb.

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the second option is the correct answer i PROMISE

Answer:

Freezing: Liquid turns into solid. Evaporation: Liquid turns into gas. Condensation: Gas turns into liquid. Sublimation: solid into gas. Deposition: Gas into solid.

Explanation:

Explanation:

[tex]CaCO _{3(s)} + 2HCl _{(aq)}→ CO _{2(g)} + H2O _{(l)} + CaCl _{2(s)}[/tex]

the amount of bromoethane (in milli- liters) that are used in this reaction is 74.13ml.

Mol wt of P-Acetamido phenol = 151.16. Mol wt of  Bromoethane  = 108.97. Mol wt of  Acetophenetidin (product) = 179.22. Paraacetamido phenol, mol wt=151.16. Bromoethane= 108.97. By the law of mass action, 151.16 g P-Acetamido phenol will react 108.97g Bromoethane to get 179.22 g Acetophenetidin (product) and 80.91 g Hydrobromic acid as a bye product. Since the density of Bromoethane = 1.47g/cc, the quantity of Bromoethane in milliliters = 108.97/1.47 = 74.13 ml. Activated carbon, also known as activated charcoal, is a form of carbon that has been processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions.  Activated carbon is used for a wide range of industrial and environmental applications, including purifying air and water, removing impurities from liquids and gases, and recovering valuable chemicals. In the laboratory, activated carbon is commonly used to purify organic compounds, remove dissolved gases from liquids, and purify water.

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Atoms follow the octet rule, which makes them more stable in pairs.

The diatomic elements oxygen and nitrogen have a slightly more complex structure. There is a double bond between the two O atoms in the O₂ dot structure. And there is a triple bond between the two N atoms in the N₂ dot structure. Diatomic elements are elements that are never found alone in nature. It is always bound to another atom. The diatomic state of this atom is much more stable than its unbonded state.

Everything around us contains energy, even if it doesn't move. All molecules and atoms have spins and vibrations, but these are all internal forces.

All atoms try to reach the lowest potential. Atom has a state of lower energy, implying maximum stability under certain external conditions.

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The type of bonding and the number of covalent bonds an atom can form with other atoms is determined by number of unpaired electrons.

The number of unpaired electrons in the valence shell because covalent bond is equal to a chemical bond that involves sharing a pair of electrons between atoms in a molecule. When electrons are shared among atoms, they make a bond known as a covalent bond. Because atoms are sharing one pair of electrons, this covalent bond is known as a single bond. These atoms can do the equal aspect that the H atoms did; they proportion their unpaired electrons to make a covalent bond.

Thus, the number of unpaired electrons is useful in the type of bonding and the number of covalent bonds.

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Answer:

D. The discovery of new evidence.

D is correct because it's the only one that would give proof and science relies on proof.

Given data

Mass of the piece of a solid carbon dioxide is m = 6.8 g

Volume of the solid carbon dioxide is V=4L

The temperature is T = 23°C = 296 K . The pressure of the air in the container is

740 Pho = 740 torr = atm 76

The temperature is T = 23 deg * C = 296K

The pressure of the air in the container is

Pho = 740 torr 740 760 atm

(a)The expression of ideal gas equation is given by,

PV = nRT

PV = (m/M) * RT

Where, P is the pressure in which the container after all the carbon dioxide is vaporizes.

M is the molar mass of the solid carbon dioxide (M = 44.01g / m * ol)

R is the universal gas constant R = (0.0832kJ / m * olK)

Substitute the all values in the above equation and calculate the value of pressure in which the container after all the carbon dioxide is vaporizes.

6.8 g 44.01 g/mol P(4L)= P= (0.0832 kJ/mol K) (296 K) (0.1545 mol) (0.0832 kJ/mol K) (296 K)

P = 0.951atm

(4L)Thus, the pressure in which the container after all the carbon dioxide is vaporizes is 0.951 atm.

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some materials made up of entirely nonmetal atoms are soluble in water while some are not Due to different combinations of pairs created, which might either dissolve extremely well, or not dissolve whatsoever

The solubility of a substance in water depends on the nature of the chemical interactions between the substance and the water molecules. Some materials made up of entirely nonmetal atoms are soluble in water because they can form hydrogen bonds with the water molecules. These materials are called polar solvents and are typically composed of polar molecules, like those found in many organic compounds. For example, ethanol (C2H5OH) is a polar solvent that is composed of entirely nonmetal atoms and is soluble in water because it can form hydrogen bonds with the water molecules.On the other hand, some materials composed of entirely nonmetal atoms are not soluble in water because they do not form hydrogen bonds with the water molecules. These materials are called non-polar solvents and are typically composed of non-polar molecules, like those found in many hydrocarbons.

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Answer:

Hey! I`m In K12. Currently in 7th, going into 8th next year. I have Mrs. Keefe and one of my teachers, what about y`all?

Answer:

Therefore, there are 4.47 moles of propane present at STP in a volume of 65.0 L

Explanation:

First, we need to calculate the number of moles of propane present at STP. At STP, the temperature is 273 K and the pressure is 1 atm.

Using the Ideal Gas Law, we can calculate the number of moles of propane present in the given volume.

PV = nRT

n = 4.47 mol

Therefore, there are 4.47 moles of propane present at STP in a volume of 65.0 L

Answer: The mass is 1030.692 grams (1.03 x 10^3 grams if you apply sig figs)

This is a units conversion problem, we'll first need the molar mass of ammonium sulfate: 132.14 g/mol

Then we can solve so that:

7.80 moles (132.14 g/moles) = 1030.692 grams

A super acid is defined as an acid with acidity greater than 100% pure H2SO4. It can also be defined as a medium in which the chemical potential of the proton is higher than in pure Sulphuric Acid.

The statement is False, when lead-209 undergoes beta decay. As the nuclear equation is n ---> p + e- + antineutrino.

Lead-209 is an atom that contains 82 protons and 127 neutrons in its nucleus, meaning that lead-209 is not a neutron. Neutrons are particles that are found in the nucleus of atoms and have no charge. Therefore, lead-209 can't undergo beta decay by emitting a neutron. Beta decay occurs when an unstable nucleus emits a beta particle and an antineutrino, changing the number of protons in the nucleus. The balanced nuclear equation for the beta decay of lead-209 would be Pb-209 (atomic number = 82) --> Bi-209 (atomic number = 83) + e- + antineutrino. The Bi-209 is a isotope of bismuth, which has one more proton than lead-209 and the same number of neutrons.

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Question-- Select True or False: When lead-209 undergoes beta decay the balanced nuclear equation for this reaction is: n ---> p + e- + antineutrino

Answer:

D. 1,950 g

Explanation:

I completed the test and it is the correct answer!

The mass of one mole of gallium iodide GaI₃ is 449.7 g/mol. Hence, the mass of 4.32 moles of GaI₃ is 1950 g.

Gallium iodide is a covalent compound formed by the electron sharing between Ga and three iodine atoms. Ga has three valence electrons and each is shared with three iodine and each iodine in turn shares 3 electrons to Ga.

Atomic mass of Ga = 69 g/mol

Atomic mass of I = 126.9 g/mol

mass of 3 iodine atoms  = 3 ×  126.9 = 380.7 g

Molar mass of GaI₃ = 380.7 + 69 = 449.7 g.

Molar mass of a compound is the mass of one mole of the compound. Hence, one mole of the compound is 449.7 g. Mass of 4.32 moles is :

4.32 × 449.7 ≅1950 g.

Therefore, the mass of 4.32 moles of  GaI₃ is approximately 1950 g.

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The total pressure in the flask is 1.320 times the total pressure.

Pressure is an important concept in chemistry, as it affects the physical behavior of gases and solids, and the rates at which reactions occur. Pressure is a measure of the force applied to an area, typically expressed in units of atmospheres (atm), or kilopascals (kPa).

Methane :

Mole fraction of methane = (231 mL / 2.00 L) = 0.1155

Partial pressure of methane = 0.1155 * Ptotal

Chlorine:

Mole fraction of chlorine = (907 mL / 2.00 L) = 0.4535

Partial pressure of chlorine = 0.4535 * Ptotal

Products:

Mole fraction of products = (75.9% com) = 0.759

Partial pressure of products = 0.759 * Ptotal

Total pressure = 0.1155*Ptotal + 0.4535*Ptotal + 0.759*Ptotal = 1.320*Ptotal

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Answer:

3.333M

Explanation:

Basically,

Molarity=(moles of solute)/(litres of solution)

=(0.5 moles)/(150/1000)L

=3.333M

Answer:

Aluminum lodide - 680 degrees

fructose- 824 degrees

potassium bromide- 2,615 degrees

calcium bromide 3, 515 degrees

lowest boiling point is 680 and highest is 3,515.

hope this helps:)

The potential energy will go into kinetic right as it is about to hit the bottom. Then, the value will be the b) same for the kinetic energy.

When an object falls, its potential energy decreases, and its kinetic energy increases. A decrease in the potential energy is exactly the same as an increase in the kinetic energy. According to the law of conservation of energy, just before the lamp stops, the potential energy at the top of the lamp and the kinetic energy at the bottom must be equal. At the foot of the hill, the potential energy is zero and the final energy is all kinetic energy. We can equate these two values ​​according to the law of conservation of energy. Adding the kinetic energy and the potential energy gives a constant (KE+PE=constant).

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Respiratory and fluid status are primary nursing interventions for patients with chemical burns.

When treating, make sure that the causative agent is completely removed. Remove contaminated clothing and jewelry and use the shower if necessary to wash off the chemicals for at least 20 minutes. Protect your eyes from chemical contamination. Cover the burn with a clean bandage.

During the first few days after a burn, check your peripheral pulse frequently for restricted blood flow. Carefully monitor hourly fluid intake and urine output, as well as blood pressure and heart rate. Any changes should be reported immediately to the burn surgeon.

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Answer:

A. Species

Explanation:

The order from least to most specific is:

Kingdom

Phylum

Class

Order

Family

Genus

Species

The Respiration reaction includes exothermic process and redox reaction. Hence, Option (D) is correct.

A process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.

C₆H₁₂O₆ + 6O2 → 6CO₂ + 6H₂O

Therefore, The Respiration reaction includes exothermic process and redox reaction. Hence, Option (D) is correct.

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Answer:

[NaCl] = 1.72 M

Explanation:

First of all, we balance the equation:

BaCl₂ + Na₂SO₄ →  2NaCl + BaSO₄

We convert mass of barium chloride to moles

45 g . 1mol / 208.23g = 0.216 moles

Ratio is 1:2. This means, that our moles of reactant may produce the double of moles, of product.

0.216 . 2 = 0.432 moles of NaCl are been produced.

Molarity is mol/L. We convert volume of water from mL to L

250 mL . 1L /1000 mL = 0.250 L

[NaCl] = 0.432 mol/0.250L = 1.72 M

Answer:

Approx. 20 moles of iron.

Explanation:

There are approx.

6.022

×

10

23

iron atoms per mole of ion. This quantity, this number of iron atoms has a mass of

55.85⋅g . And of course, when we quote the mass of iron we say

55.85⋅g⋅mol−1 .

The energy is produced due to the process of beak down in the chemical process or reaction.

That energy is stored in the bonds of the chemical compounds which include molecules and atoms. The point is released in the chemical reaction and the most power produces heat as a by-product, known as an exothermic reaction.

Energy may be released in a chemical reaction in the form of heat; that reaction is called exothermic. Reactions that require an input of heat to proceed may store some of that energy as chemical energy in newly formed bonds.

So we can conclude that  Energy defined as the capacity to supply heat or do work is known as energy.

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