If 80% of the moths are dark and you have 80 moths, how
many would be dark??

The charged particles involved in  Thomson’s cathode–ray tube experiment is the negatively charged particles that we now call electrons.

The charged particles involved in the mass spectrometer is positively charged ions that is being deflected by magnetic fields.

The Mass spectrometer is an analytical tool that is used to measure the mass-to-charge ratio of ions.

One of the advantages of the mass spectrometer is that it is an excellent tool for identifying unknown components in a sample or confirming their presence.

The major disadvantages of mass spectrometer is that it is not very good at identifying hydrocarbons that produce similar ions and it's unable to tell optical and geometrical isomers apart.

In conclusion, some applications of mass spectrometer includes drug testing and discovery, food contamination detection.

Learn more about mass spectrometer at: https://brainly.com/question/28174174

#SPJ1

The sample response is : how do mass and the type of material affect thermal energy transfer?

So one need to have include the below factors in your answer:

The mass of an object influences allure thermal strength transfer traits. Generally, objects accompanying best public have greater warm strength depository volume.

They can absorb more heat strength before experience a meaningful change in hotness. If an equal amount of heat is used to both objects, the object accompanying better mass will demand more heat strength to raise allure temperature distinguished to the object accompanying tinier mass .

Learn more about  thermal energy transfer from

https://brainly.com/question/4199638

#SPJ1

. In this experiment, you need to examine the idea of the thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, be limit your question to only two. What did you include in your question?

Answer:

The answer is "5.4".

Explanation:

\(BoH + HCL =BCL +H_2o \\\\At eq \\\\N_1V_1=N_2V_2 \\\\v_2=20 \ ml\\\\[BCL]=\frac{20 \times 0.08}{20+20}=0.04\\\\pH = \frac{1}{2} [pkw - pk_b - \log e]\\\\pk_b = 2 pH - Pkw + \Log C\\\\pK_b=5.4\)

The complete balanced equations with the stoichiometric coefficients are:

10) 16Al + 3S₈ → 8Al₂S₃

11)  6 Cs + N₂  →  2Cs₃N

12) Mg + Cl₂ →  MgCl₂

The quantity of molecules involved in the reaction is known as the stoichiometric coefficient or stoichiometric number. Any balanced response has an equal number of components on both sides of the equation, as can be seen by looking at it. The number that is present in front of atoms, molecules, or ions is known as the stoichiometric coefficient.

13)10Rb + 2RbNO₃ → 6Rb₂O + N₂

14) 2C₆H₆ + 15O₂ → 6H₂O + 12CO₂

15) N₂ + 3H₂ →   2NH₃

16)Al(OH)₃ + H₂SO₄ → Al₂(SO₄)₃ + H₂O

17) 2Na + Cl₂ →   2NaCl

18) 16Rb + S₈ → 8Rb₂S

19) 2H₃PO₄ + 3Ca(OH)₂ → Ca₃(PO₄)₂ + 6H₂O

To know more about Balancing a chemical equation, visit:

https://brainly.com/question/28294176

#SPJ1

Answer:

propane-1-ol.

is the ans.

ok

is the name

ok

How do I know I'm a fish eh sorry

Answer:

1. is Molar (with capital M)

2. is molal (m)

Explanation:

By definition, 1 Molar solutions have 1 mol of solute in 1 L of solution and 1 molal solutions have 1 mol of solute in 1 Kg of solvent

Enthalpy change (H) and entropy change (S) are 11.7 103 Jmol-1 and 105 Jmol-1K-1, respectively, for a reaction at 25 °C.

The absolute entropies of a reactants and their products are S°(N2H4) (= half of this period J/(mol•K), S°(N2) = 191.6 J/(mol•K), or S°(H2) = 130.7 J/(mol•K) at 25°C, where the standard enthalpy change (H°) is 50.6 kJ/mol.

E0 is known as 0.268 V at standard potential at 25°C, despite a slight variation in the computed value above. Similar to a silver-silver chloride electrode, the electrode potential is dependent on the chloride ion concentration.

To know more about entropy visit:

https://brainly.com/question/24278877

#SPJ1

Answer:

An unknown metal between 10-30 g is transferred to a test tube, place the tube in water that is boiling for ten minutes until it reaches a thermal equilibrium.

Explanation:

The molarity of the solution (0.26 M). The result is 1.46 L, which is the volume of the solution that would contain 0.38 mole of Na₂MnO4.

Molarity is a unit of measure used to indicate the concentration of a solute in a solution. It is expressed in moles of solute per liter of solution (mol/L). This measure is useful for describing the amount of a particular chemical species present in a solution, as well as for determining the amount of a reactant or product that is produced in a chemical reaction. Molarity is also used to calculate the amount of a substance that must be added to a solution to achieve a desired concentration.

The number of liters of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 can be calculated using the following equation:
Volume (L) = moles (mol) / Molarity (M)
Therefore, the volume of a 0.26 M solution of Na₂MnO4 that would contain 0.38 mole of Na₂MnO4 is:
Volume (L) = 0.38 mol / 0.26 M
Volume (L) = 1.46 L

To learn more about molarity
https://brainly.com/question/14469428
#SPJ1

The AHrxn when 0.250 kg of iron rusts is  -1.85 kJ.  4.48 mol rust forms when 4.50 × 10³ kJ of heat is released.

The chemical element iron has the atomic number 26 and the symbol Fe. It is a metal that is found in group 8 of the periodic table and the first transition series. It makes up a large portion of both the outer and inner core of the planet and is, by mass, the second most prevalent element after oxygen.

The balanced chemical reaction shows that the heat released or heat of reaction is 1.65 × 103 kJ for every 4 moles of Fe (iron) created.

Then, calculate the moles of iron first as follows

moles iron = 250 g / ( 55.85 g / mol )

= 4.48 mol

Therefore, the heat of reaction is:

δhrxn = ( -1.65 × 10³ kJ / 4 mol ) * ( 4.48 mol )

= -1.85 kJ

Thus, The AHrxn when 0.250 kg of iron rusts is  -1.85 kJ.  4.48 mol rust forms when 4.50 × 10³ kJ of heat is released.

To learn more about the iron, follow the link;

https://brainly.com/question/18500540

#SPJ1

d. The mass of the reactants and products is equal and is not dependent on the physical state of the substances explains the correct statement about the law of conservation of mass.

The law of conservation of mass is the law that states that matter or energy can neither be created nor destroyed. This means that the amount of matter in the universe is always the same. The law of conservation of mass is a fundamental law of physics and it is always obeyed by all physical processes.

The amount of matter in a closed system (one that is not subject to outside influences) will remain constant over time.

It is always obeyed even under the most extreme conditions, such as during nuclear reactions.

Hence, the correct option is d.

To know more about chemical laws, click below:

https://brainly.com/question/25587265

#SPJ1

Here are some questions on Personal Care services on E2020 are:

An infection is the entrance and growth of dangerous microorganisms in the body that harm the host, such as bacteria, viruses, fungus, or parasites.

Infections can be systemic (affecting the entire body) or localized (affecting a particular area of the body), and they can be moderate to severe.

Learn more about infection on https://brainly.com/question/14083398

#SPJ1

Answer:

C

Explanation:

You can’t round a phone number or Pin code

why would you round your birth year?

A positively charged particle with mass 1.673 x 10-24 g is a(n) proton.

D.) Proton

Considering the combined law equation, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.

Boyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant.

This law says that volume is inversely proportional to pressure: if pressure increases, volume decreases, while if pressure decreases, volume increases.

Mathematically, Boyle's law states that the multiplication of pressure by volume is constant:

P×V= k

Charles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant.

This law says that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.

Mathematically, Charles' law states that the ratio of volume to temperature is constant:

\(\frac{V}{T}=k\)

Gay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.

This law says that the pressure of the gas is directly proportional to its temperature: if the temperature increases, the pressure increases, while if the temperature of the gas decreases, the pressure decreases.

Mathematically, Gay-Lussac's law states that the ratio of pressure to temperature is constant:

\(\frac{P}{T}=k\)

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\(\frac{PV}{T}=k\)

Considering an initial state 1 and a final state 2, the following holds:

\(\frac{P1V1}{T1}=\frac{P2V2}{T2}\)

In this case, you know:

Replacing in the combined law equation:

\(\frac{1.89 atmx10.9 mL}{294 K}=\frac{2.25 atmxV2}{298 K}\)

Solving:

\(\frac{1.89 atmx10.9 mL}{294 K}\frac{298K}{2.25 atm} =V2\)

9.28 mL= V2

Finally, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.

Learn more about combined law equation:

brainly.com/question/4147359

#SPJ1

Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.

Examples of Balancing Chemical Equations

Answer:

B

Explanation:

Answer:

O generation of winds

Explanation:

The uneven heating causes temperature differences, which in turn cause air currents (wind) to develop, which then move heat from where there is more heat (higher temperatures) to where there is less heat (lower temperatures). The atmosphere thus becomes a giant "heat engine", continuously driven by the sun.

The number of moles of \(Cl_2\) required to produce 250 grams of \(PCl_5\) would be 3 moles.

Phosphorus and chlorine react to form phosphorus pentachloride according to the following balanced equation:

\(2P + 5Cl_2 -- > 2PCl_5\)

From the equation of the reaction, the mole ratio of chlorine and phosphorus pentachloride is 5:2. Thus, 5 moles of chlorine will produce 2 moles of phosphorus pentachloride.

Recall that: mole = mass/molar mass

The molar mass of \(PCl_5\) is 208.24 g/mol

Thus, 250 g of \(PCl_5\) would be equivalent to:

mole = 250/208.24

         = 1.20 mol

2 mol \(PCl_5\) = 5 moles \(Cl_2\)

1.20 mol = 5 x 1.2/2

              = 3 moles

In other words, 250 g \(PCl_5\) will require 3 moles of \(Cl_2\).

More on stoichiometric problems can be found here: https://brainly.com/question/15047541

#SPJ1

Ina chemical reaction, no mass can be destroyed or created and no energy can be destroyed or created.

Thus, the energy released from a chemical reaction, be it heat or light, have to come from the reactants of this reaction.

Kinetic energy can be release, but not on chemical reactions, kinetic energy change is not part of chemical reactions.

The energies involved in chemical reactions are bond energies.

The energy can't come from the products, because for this energy to be released the bonds have to be broken, and the products are the result, so they will no be broken.

Thus, the energy can only com from the stored bond energy in the reactants.

Answer:

Part A: Protonation, Protonation

Part B: An elimination, A substitution

Explanation:

The dehydration ethanol and the condensation of ethanol all begin from the protonation of ethanol. This is because, water is a good leaving group. Thus, the protonation of the -OH moiety of the molecule is the first step in each mechanism.

The dehydration of ethanol is an elimination reaction because it involves the loss of H-O-H from the ethanol molecule while the condensation of ethanol is an substitution reaction because the -OH moiety is replaced by -OCH2CH3.

Answer:

3 steps are

evaporation

condensation

precipitation

Answer: B. Allow for movement

Explanation: Because the muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction. Make sure to add me as a friend!!! <3 YW!!!

One possible reason for cooler air temperatures in Christchurch during El Niño years is the shift in atmospheric circulation patterns.

During El Niño years, Christchurch may experience cooler air temperatures due to several factors associated with the El Niño phenomenon.

El Niño is characterized by the abnormal warming of the surface waters in the eastern tropical Pacific Ocean, which has global climatic implications. While El Niño is primarily associated with changes in oceanic conditions, its effects can extend to atmospheric patterns, leading to altered weather patterns and temperature variations.

One possible reason for cooler air temperatures in Christchurch during El Niño years is the shift in atmospheric circulation patterns. El Niño can disrupt the normal global atmospheric circulation, resulting in changes in the positioning and intensity of weather systems.

This can lead to the advection of cooler air masses from the south or southeast towards Christchurch, resulting in cooler temperatures.

Another factor is the influence of El Niño on regional rainfall patterns. El Niño often leads to drier conditions in the South Island of New Zealand, including Christchurch.

Reduced cloud cover and less moisture in the air can contribute to cooler temperatures as there is less insulation from the sun's radiation and less evaporative cooling. Additionally, the absence of significant rainfall can result in less moisture in the soil, leading to cooler conditions as less energy is used for evaporation.

For more such questions on temperatures visit:

https://brainly.com/question/4735135

#SPJ8

447.8 liters of \(H_{2}\) can be produced at STP using 80.0 g of methane and 16.3 g of water, and water is the limiting reactant.

Limiting reactant is a chemical reactant used in a reaction that is completely used up before any other reactant is used. It limits the amount of product that can be produced in a given reaction.

Methane \((C*H_{4})\) reacts with water \((H_{2}O)\)to produce hydrogen \((H_{2})\) and carbon dioxide \((C*O_{2})\). The equation for this reaction is:
\(C*H_{4} + 2H_{2}O \rightarrow C*O_{2} + 4H_{2}\)
Using the given masses of reactants, we can calculate the number of moles of methane and water.
Methane: \(80.0 g C*H_{4} × 1 mol C*H_{4}/16.04 g C*H_{4} = 4.99 mol C*H_{4}\)

Water: \(16.3 g H_{2}O × 1 mol H_{2}O/18.02 g H_{2}O = 0.90 mol H_{2}O\)
Now we can use the mole ratio from the balanced equation to determine the limiting reactant.
Methane: \(4.99 mol C*H_{4}/1 mol C*H_{4} = 4.99 mol C*H_{4}\)
Water: \(0.90 mol H_{2}O/2 mol H_{2}O = 0.45 mol H_{2}O\)
Since the mole ratio of water is lower than that of methane, water is the limiting reactant.
Now we can use the molar ratio of the reaction to calculate the number of moles of hydrogen produced.
\(4.99 mol C*H_{4} × 4 mol H_{2}/1 mol C*H_{4} = 19.96 mol H_{2}\)
Finally, we can use the ideal gas law to calculate the number of liters of H_{2} at STP (standard temperature and pressure).
\(19.96 mol H_{2} × 22.4 L H_{2}/1 mol H_{2} = 447.8 L H_{2}\)
Therefore, 447.8 liters of \(H_{2}\) can be produced at STP using 80.0 g of methane and 16.3 g of water, and water is the limiting reactant.

To learn more about limiting reactant
https://brainly.com/question/14222359
#SPJ1

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

Any planet that is made up of mostly rock.

The volume of krypton is 2824.213 ml

What is Volume?

Volume can be defined as a measure of occupied space of a closed container.

In the given question, the volume is gotten by dividing the mass by the density.

parameters given

Density=0.003749g/ml

mass= 3.09g

Volume= mass/density

volume=3.09/0.003749

volume= 2824.213 ml

In conclusion, volume of can be gotten by dividing mass by density.

Learn more about volume at:https://brainly.com/question/1789840

#SPJ1

Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

For more such questions on compounds

https://brainly.com/question/704297

#SPJ8