On a statistical basis,smoking a single cigarrette lowers your life expectancy by 642,000--------------------------.Pls answer this question

Answer:

1 biosphere 2 hydrosphere 3 geosphere 4 atmosphere

Answer:

Fish are more likely to hold a soft bait longer. ... Signs of small fish activity can lead you to fishing hot spots. ... Cover can be loosely defined as anything that will hide or protect the fish.

Explanation:

Fishes live in virtually all aquatic habitats. Different species of fish are adapted for different habitats: rocky shores, coral reefs, kelp forests, rivers and streams, lakes and ponds, under sea ice, the deep sea, and other environments of fresh, salt, and brackish water.

Answer:

42 grams

Explanation:

the conversion between moles and grams is by using the molar mass of the substance.

The molar mass for a nitrogen atom is 14.00 g/mol.

N2 has two nitrogen atoms, so its molar mass is 28.00 g/mol

To find how many grams are in 1.5 moles;

                                           \(28g/mol*1.5mol\)

the units of mols cancels out, leaving one with units of grams of N2

The information that the percent composition of an atom in a molecule give is the The total mass that element contributes to a molecule. That is option C.

The percent composition of an atom in a molecule is the total mass/amount of an element present in a molecule/compound to the molecular mass of the compound, multiplied by 100.

The mass of an atom is the amount of matter that is contained in that atom.

When you are calculating the percentage composition of an atom in a molecule this is to find out the mass of the atoms of the element that contributes to the given molecule.

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Answer:

Molar mass of

N

2

=

28 g/mol

Moles of

40.5 g N

2

gas

=

40.5 g

28 g/mol

=

1.45 mol

1 mol

of any gas at

STP

occupies

22.4 L

of volume.

1.45 mol

of

N

2

gas will occupy

1.45

mol

×

22.4 L

1

mol

=

32.48 L

Answer:

"The habitual taking of addictive or illegal drugs."

Explanation:

Drug abuse is intertwined with drug addiction, which itself is known as a substance use disorder. Such diseases affect a person's brain and behavior, eventually leading to the inability to control the use of the drug or medicine.

Answer:

alkenes and cyclic compounds

Answer:

Farmers spray to mitigate crop damage caused by pests. A pest is any biological organism, including weeds, pathogens, and arthropods, that interferes with the production of crops affecting quality and/or yield. ... Pesticides work in many different ways by affecting their target, whether it be a weed, pest, or disease.

Explanation:

this is my answer❤︎

Answer:

20 valence electrons

Explanation:

The number of valence electrons in carbon (C), hydrogen (H), and chlorine (Cl) are 4, 1, and 7, respectively. The number of total valence electrons (TVE) in CH₂Cl₂ is calculated as follows-

TVE in CH₂Cl₂ = valence electrons in C + 2(valence electrons in H) + 2(valence electrons in Cl)

= 4 + 2(1) + 2(7)

= 20

Answer:

Explanation: Carbon and silicon BOTH come from Group 14 of the Periodic Table , i.e. both formally have the same number of valence electrons, 4 such electrons.........

Based on the equation of the reaction, the unsimplified molar ratio used to convert H₂O into CO₂ is:

moles of CO₂ = moles of  H₂O * 4/6

The molar ratio of a reaction is the ratio in which the mole of the reactants combines to form products.

The molar ratio of a reaction can be expressed as the molar ratio of reactants and reactants, reactants and products, or products and products.

The molar ratio of a reaction is obtained from the balanced equation of the reaction.

Considering the given reaction;

equation of reaction: 2 C₂H₆ + 7 O₂ ----> 4 CO₂ + 6 H₂O

The molar ratio of the products carbon dioxide, CO₂ and water, H₂O is 4 : 6.

This means that in the given reaction of the combustion of ethane, for every 4 moles of carbon dioxide formed, 6 moles of water will be formed.

Hence the conversion factor to convert moles of  H₂O to moles of CO₂ is:

moles of CO₂ = moles of  H₂O * 4/6

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Answer: pure water is homogeneous and pure substance.

Explanation: However, when a homogeneous substance consists of two or more different types of molecules uniformly intermingled with one another, then it’s called a homogeneous mixture. A mixture’s composition can vary, but a pure substance does not.

Answer:

True

Explanation:

since the gases and minerals dissolved in water are in the same state as water and they do not form separate layers

The number of moles of gas in the sample is 0.72 mol.

To determine the number of moles in the gas, we use the ideal gas law:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant ( 0.08206 Latm/molK ), and T is the temperature in Kelvin.

First, convert the temperature from Celsius to Kelvin:

T (K) = T (°C) + 273.15

T (K) = 35.2 + 273.15

T (K) = 308.35 K

Next, we need to convert the pressure from torr to atm:

1 atm = 760 torr

P (atm) = 735.5 torr / 760 torr/atm

P (atm) = 0.96776 atm

Plug in the values we have and solve for n:

PV = nRT

n = PV / RT

n = (0.96776 atm)(18.86 L) / (0.08206L·atm/mol·K)(308.35 K)

n = 18.25 / 25.303

n = 0.72 mol

Therefore, there are 0.72 moles of gas in the sample.

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The source of energy in nuclear power plants is optionD. Fission.

The source of energy in nuclear power plants is nuclear fission. Nuclear fission is the process in which the nucleus of an atom, typically a heavy element like uranium or plutonium, is split into two smaller nuclei, releasing a significant amount of energy in the process. This energy is harnessed to generate heat, which is then used to produce steam and drive turbines connected to generators, ultimately generating electricity.

In a nuclear power plant, controlled fission reactions occur in the reactor core, where nuclear fuel, such as uranium-235 or plutonium-239, is used as the fuel source. When these fuel nuclei undergo fission, they release high amounts of energy in the form of heat and also emit additional neutrons, which can sustain a chain reaction if properly controlled.

It's important to note that fusion (option A) is the process of combining two light atomic nuclei to form a heavier nucleus, which also releases a substantial amount of energy. However, fusion reactions have not yet been fully developed for practical energy generation in power plants.

Alpha decay (option B) is a type of radioactive decay where an atomic nucleus emits an alpha particle. Combustion (option C) refers to the process of burning a fuel in the presence of oxygen, which is not the mechanism utilized in nuclear power plants.The correct answer is d.

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The pH of the solution is 10.82.

To solve this problem, we need to determine the concentration of the hydronium ion (\(H_3O^+\)) in the solution. This can be done using the following steps:

Write the balanced chemical equation for the reaction between HBr and CH₃NH₂.

HBr + CH₃NH₂ → CH₃NH₃⁺ + Br⁻

Write the expression for the base dissociation constant (Kb) for CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

Calculate the concentration of hydroxide ions (OH⁻) in the solution using the Kb value and the concentration of CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

4.4 × 10⁻⁴ = x² / (0.400 M)

x = 6.63 × 10⁻³ M

[OH⁻] = 6.63 × 10⁻³ M

Calculate the concentration of \(H_3O^+\) using the equilibrium constant for the reaction between HBr and \(H_2O\).

\(HBr + H_2O = H_3O^+ + Br^-\)

\(Kw = [H_3O^+][OH^-] = 1.0 * 10^{-14}\\[H_3O^+] = Kw/[OH-] = 1.51 * 10^{-11}\)

Calculate the pH using the concentration of \(H_3O^+\).

\(pH = -log[H_3O^+]\\pH = -log(1.51 * 10^{-11})\)

pH = 10.82

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The mass percentage of C in morphine would be 4.21%.

The mass percentage of a composition in a compound is the mass of the composition relative to the mass of the entire compound. This can be mathematically expressed as:

Mass percentage = mass of component/mass of substance x 100%

In this case, we are looking for the mass percentage of C in \(C_{17}H_{19}NO_3\).

Molar weight of C = 12 g/mol

Molar mass of  \(C_{17}H_{19}NO_3\) = (12x17) + (1x19) + (14x1) + (16x3)

                                             = 285 g/mol

Mass percentage of C = 12/285

                                     = 4.21% to 2 decimal places.

In other words, the mass percentage of C in morphine is 4.21%.

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Answer:

no se lo siento nesesito puntos

Answer:

its a tree becoz charcoal came from wood

Answer:

Explanation:

Therefore, the pH of the HCl solution is 5.

Taking into account the definition of Avogadro's number and molar mass, 4.806 grams of water are present in 1.61×10²³ molecules.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

Taking into account the definition of Avogadro's Number, you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of water, then 1.61×10²³ molecules are contained in how many moles of water?

amount of moles of water= (1.61×10²³ molecules× 1 mole)÷ 6.023×10²³ molecules

amount of moles of water= 0.267 moles

Now, taking into account the definition of molar mass, and knowing that the molar mass of water is 18 g/mole, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 18 grams, 0.267 moles of the compound contains how much mass?

\(mass= \frac{0.267 molesx 18 grams}{1 mole}\)

mass= 4.806 grams

Finally, 4.806 grams of water are present in 1.61×10²³ molecules.

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1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

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Answer:

the heat capacity of steam is 2.01 J/(g⋅∘C) and of ice is 2.09 J/(g⋅∘C). 1. See answer.

Answer:

it's an example of a closed circuit

101 mmHg is the total pressure in the tank.

Thus, Dalton's Law of Partial Pressures states that while the volume and temperature of a gaseous mixture are held constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components.

Nitrogen, oxygen, argon, carbon dioxide, water vapor, and a trace amount of other gases are all present in atmospheric air and pressure.

The increased oxygen content in the chamber can displace the CO bound to hemoglobin faster than air oxygen, hence the hyperbaric chambers are also used to treat carbon monoxide (CO) poisoning. The treatment of scuba divers with the bends is another application for hyperbaric chambers.

Thus, 101 mmHg is the total pressure in the tank.

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A blowtorch flame at 1300°C is hotter than a candle flame at 1830°F.

To compare the two temperatures, we need to convert one of them to the same unit as the other. We can convert 1300°C to °F by using the formula:

°F = (°C × 1.8) + 32

Plugging in 1300°C, we get:

°F = (1300 × 1.8) + 32 = 2372°F

So the blowtorch flame is 542°F hotter than the candle flame.

Alternatively, we can convert 1830°F to °C by using the formula:

°C = (°F - 32) ÷ 1.8

Plugging in 1830°F, we get:

°C = (1830 - 32) ÷ 1.8 = 999°C

So the candle flame is 301°C cooler than the blowtorch flame.

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Answer:

search it up

Explanation:

Answer:

-133.2 kJ

Explanation:

Let's consider the following balanced equation.

4 KClO₃(s) → 3 KClO₄(s) + KCl(s)

We can calculate the standard Gibbs free energy of the reaction (ΔG°rxn) using the following expression.

ΔG°rxn = 3 mol × ΔG°f(KClO₄(s)) + 1 mol × ΔG°f(KCl(s)) - 4 mol × ΔG°f(KClO₃(s))

ΔG°rxn = 3 mol × (-303.1 kJ/mol) + 1 mol × (-409.1 kJ/mol) - 4 mol × (-296.3 kJ/mol)

ΔG°rxn = -133.2 kJ

Hello. Your question is missing data, which makes it difficult to answer it with exactness, but I will try to help you in the best possible way.

If the reaction absorbs energy it means that the reaction is endothermic. This is because endortemic reactions are those that absorb energy from the environment, as opposed to exothermic reactions that release energy into the environment.

In that case, if the reaction is absorbing energy, it is appropriate for the water bath temperature to drop.

Answer:

\(m_{H_2O}=0.676gH_2O\)

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the maximum mass of water by firstly setting up the undergoing chemical reaction as follows:

\(CH_4+2O_2\rightarrow CO_2+2H_2O\)

Thus, we are able to firstly calculate the moles of water produced by both methane and oxygen in order to identify the limiting reactant, which is related to maximum of water:

\(0.963 gCH_4*\frac{1molCH_4}{16gCH_4}*\frac{2molH_2O}{1molCH_4} =0.120molH_2O\\\\1.2gO_2*\frac{1molO_2}{32gO_2}*\frac{2molH_2O}{2molO_2} =0.0375molH_2O\)

Thus, we infer the limiting reactant is O2 and therefore we can obtain up to 0.0375 moles of water, which are related to the following mass:

\(m_{H_2O}=0.0375molH_2O\frac{18.02gH_2O}{1molH_2O}=0.676gH_2O\)

Regards!