Select the correct answer. What is heat of vaporization? A. It is the heat required to change a substance’s temperature by 1°C. B. It is the heat required to change a gram of substance from a solid to a liquid. C. It is the heat required to change a substance from a solid directly to a gas. D. It is the heat required to change a gram of substance from a liquid to a gas. E. It is the heat required to separate one substance into two substances.

Answer:

The total water content in the earth remains nearly constant.

Explanation:

Answer:

the water is constant

:(

Explanation:

Answer:it’s D

Explanation:

Ca0 is the correct answer

Option D (CaO), which is a binary molecule made up of calcium and oxygen, is the appropriate response.

A chemical compound that only contains two elements is known as a binary compound. We'll examine each choice to see which is a binary compound.

A. Nitrogen (N) and four hydrogen (H) atoms make up this chemical, which is not binary because it comprises four different elements. It is an ammonium polyatomic ion.

B. H₂SO₄: Since it comprises three elements—hydrogen (H), sulfur (S), and oxygen (O)—it is not a binary compound. It is a sulfuric acid-related polyatomic chemical.

C. O₂: Because it just contains the element oxygen (O), this compound is not a binary one. It is an oxygen gas molecule, also referred to as molecular oxygen.

D. Calcium oxide (CaO) is a binary molecule because it simply consists of calcium (Ca) and oxygen (O). It's known as calcium oxide.

Therefore, option D (CaO), which is a binary molecule made up of calcium and oxygen, is the appropriate response.

To know more about hydrogen:

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Answer:

loose hair, flammable clothing, and all stored chemicals especially flammable liquids., should be kept away from heat.

A fire blanket is a highly flame-resistant blanket that can be used to extinguish a small fire or to wrap around a person in case of a fire and water helps put it out too.

Answer:

A.)fire blanket

Explanation:

102 grams of ammonia is formed when 3 moles of nitrogen and 6.7 moles of hydrogen reacts.

Explanation:

The equation given is of Haeber's process in which the nitrogen is limiting factor in the ammonia formation and hydrogen if in excess gets delimited.

We know that 1 mole of Nitrogen gives 2 moles of ammonia.

We have 3 moles of nitrogen here,

So, 6 moles of ammonia will be form

so from the formula

no of moles=mass/atomic mass

           mass= no. of moles*atomic mass

                     = 6*17

                       = 102 grams of ammonia will be formed.

So, 6 moles or 102 grams of ammonia is formed when 3 mole of nitrogen and 6.7 mole of hydrogen reacts.

Answer:

The periodic table tells you the atomic number (which tells you the number of protons and electrons). It also includes the mass number, which is the sum of the protons and neutrons in the nucleus of an atom.

The periodic table provides information about the atomic number, atomic mass, electron configuration, group, and period of elements, allowing you to learn about atoms of different elements.

By examining the periodic table, you can learn important information about different elements and their atoms. The periodic table provides information about the atomic number, symbol, atomic mass, and electron configuration of each element. For example, the atomic number tells you the number of protons in an atom, while the electron configuration gives you information about the arrangement of electrons in different energy levels. Additionally, the periodic table also allows you to determine the group and period of an element, which can provide insights into its chemical properties.

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B

Gathering accurate data about the temperatures at different altitudes is important for predicting if precipitation will take the form of snow, sleet, hail, or rain.

Explanation:

Usually, temperatures lower with altitude the reason clouds form when a warm humid air mass rises into the upper atmosphere. The moisture condenses into clouds in the upper atmosphere that precipitate as rain. However, when the upper atmosphere is even cooler, other types of precipitation like hail and snow will form. Hail forms when the cloud water droplet freezes to ice and coalesce while snow is more or less individual cloud water particles that are frozen.  Studying the temperatures of the upper troposphere can help determine what kind of precipitation to expect.

Answer:

B.

if precipitation will take the form of snow, sleet, hail, or rain

Explanation:

Answer & Explanation:

Energy is transferred throughout the food chain as animals at lower trophic levels are consumed by those at higher trophic levels. ... Therefore, at each stage of the food chain, less energy and biomass is transferred between organisms than at the previous trophic level.

i love your pfp

Answer:

44.2124+0.81 = 45.0224 + 7.335 = 52.3574

Answer: 385cm3

Explanation:

V1 = 375cm

P1 = 770mmHg

P2 = 750mmHg

V2 =?

P1V1 = P2V2

770x375 = 750xV2

V2 = (770x375) /750

V2 = 385cm3

Answer:

it’s artificial

Explanation:

Answer:  BACON

Explanation:

Correct Question Format:

Throughout your job search, you’ll find that

A the economy

B education

C salary

is closely related to the career of your choosing. It’s important to take the time to find out what to expect now, so you can start developing the

A task

B communication

C skill

that you need to excel in that career.

Answer:

Throughout your job search, you’ll find that  education   is closely related to the career of your choosing. It’s important to take the time to find out what to expect now, so you can start developing the  skill  that you need to excel in that career.

Explanation:

At the time of attending our interview, we find that the question raised from an interviewer related to the choosing of the field and from our educational background. So, it clearly based on what we learn via our education and how we can get connected to the selected field but not based on our salary or an economy.

Similarly, it is essential to make a note about the requirement from the chosen field and have to prepare our skill accordingly. It means that required to develop the knowledge related to our selective field and should be presented in a connected way in front of an interviewer.

Throughout your job search, you'll find that which is closely related to the career of your choosing. It's important to take the time to find out what to expect now, so you can start developing the skill you need to excel in that career. Furthermore, volunteering in societal development will go a long way in giving you a stand among your peers. Finally try to connect to the people in your field to know the right  person to guide you to  succeed

Answer:

Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others.

Explanation:

Answer:

Matter is anything that has mass and occupies a space. Matter has 2 properties physical properties and chemical properties. And 2 physical properties include mass and shape (solid, liquid and gas).

Other physical properties of molecular matter include:

Volume

Color

Odor

Luster

Hardness

Melting Point

Freezing Point

Boiling Point

Density

Malleability

Ductility

Conductivity

Pressure is 2.32 atm.

Explanation:

Ideal gas law is given as, PV = nRT

P represents pressure, V represents volume, T represents, temperature in Kelvin, R is nothing but the gas constant, its value is 0.08206 L atm mol⁻¹K⁻¹.

n represents the number of moles.

We have to convert temperature in Kelvin by adding 273 K to the given temperature in Celsius.

Temperature = 61°C + 273 K = 334 K

Plugin the values in the above equation as,

P = [tex]\frac{nRT}{V}[/tex]

  = [tex]\frac{0.214 mol \times0.08206 L atm/mol K\times 334 K }{2.53L}[/tex]

= 2.32 atm  

Answer:

The fourth one down

Explanation:

It is the only setup in which the units of "cm" and "in" cancel correctly and give the desired units of "ft."

The second one down has the correct units but the wrong conversion factor for converting centimetres to inches.

The student is asked to use dimensional analysis for unit conversion within the metric system, such as converting meters to centimeters using a ratio or conversion factor.

The question asks for the conversion of centimeters to fit, which appears to be a typo and should likely refer to converting measurements within the metric system. Specifically, the task involves applying dimensional analysis to convert lengths from one unit to another, such as meters to centimeters or vice versa.

Steps for Conversion Using Dimensional Analysis

Identify the provided measurement and its unit.

Determine the unit you need to convert to.

Set up a conversion factor, which is a ratio representing the relationship between two units.

Multiply the given measurement by the conversion factor to get the answer in the desired unit.

For example, to convert 1.5 meters to centimeters, you set up the proportion: 100 cm/1 m = x cm/1.5 m. By cross multiplying and solving the proportion, you find that x = 100 × 1.5 cm, which equals 150 cm.

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Final answer:

Lions hunting for food is an example of a learned behavioral adaptation, while the other provided options (stickleback behavior, spider web building, and bird nest building) represent innate behaviors.

Explanation:

When considering the examples provided, one stands out as a learned behavioral adaptation, and that is lions hunting for food. Unlike the other examples that are innate behaviors, lions have to learn and perfect their hunting techniques through experience. Spiders building webs, sticklebacks behaving aggressively, and birds building nests are all examples of innate behaviors, which don't vary significantly among individuals of the same species and do not require learning.

Learned behaviors, such as habituation and imprinting, are crucial to the survival and adaptation of animals as they can adjust their actions based on environmental cues and past experiences.

Answer:

When a substance gains or loses energy, its temperature or state changes. These two changes do not happen with respect to time; the temperature remains the same until the change of state is complete.

Explanation:

This statement is about energy and change of the state of the matter. By gaining or losing energy, the physical state of the matter can change into one another. Melting, freezing, condensation, evaporation, sublimation, and deposition are the processes that support to change the physical state of the matter. Change in state and change in the matter do not happen at the same time. A substance gains or loses energy to reach a specific temperature and remains constant until the physical change of matter is completed.

Answer:

i believe the answer is b.) carbon fixation

Answer:

1.6mol

Explanation:

CH4 + 2O2 → CO2 + 2H20

From the equation,

1mole of CH4 reacted to produce 2moles of H2O.

Therefore Xmol of CH4 will react to produce 3.2moles of H2O i.e

Xmo of CH4 = 3.2/2 = 1.6mol

Therefore, 1.6mol of CH4 will react to produce 3.2moles of H2O

Answer:

1-c+4c+c=-28+3c

Explanation:

since,the expression can be solved,solve it and gain your answer.Don't truly trust me though.

Final answer:

The expression 1-c+4c-29 is simplified by combining like terms to get 3c-28.

Explanation:

The expression provided by the student is 1-c+4c-29. To simplify this expression, we combine like terms. The terms that contain 'c' can be combined, and the constants can also be combined. We start by adding together the coefficients of 'c', which gives us 3c (since -c + 4c = 3c). Then, we combine the constants 1 and -29, which gives us -28. So simplified, the expression is 3c - 28.

Answer: 4.8x10^-9 mol

Explanation:

1mole of Silver nitrate contains 6.02x10^23 molecules

Therefore, Xmol of silver nitrate will contain 2.888x10^15 molecules i.e Xmol of silver = 2.888x10^15/6.02x10^23 = 4.8x10^-9 mol

Answer: no

Explanation:

Yo sup??

Let the percentage of K-39 be x

then the percentage of K-40 is 100-(x+0.01)

We know that the net weight should be 39.5. Therefore we can say

(39*x+40*(100-(x+0.01))+38*0.01)/100=39.5  

(since we are taking it in percent)

39*x+40*(100-(x+0.01))+38*0.01=3950

39x+4000-40x-0.4+0.38=3950

2x=49.98

x=24.99

=25 (approx)

Therefore K-39 is 25% in nature and K-40 is 75% in nature.

Hope this helps.

Answer:

gram: 743.8915    milligram: 743891.5

Explanation:

use google my friend

1.64 pounds is equivalent to 743.904 grams or 743904 milligrams; this is achieved by using the conversion factors: 1 pound equals 0.4536 kilograms and 1 kilogram equals 1000 grams.

To convert 1.64 pounds to grams and milligrams, we use the fact that 1 pound is equivalent to 0.4536 kilograms, and 1 kilogram is 1000 grams. Therefore, to get the weight in grams:

1.64 lb x 0.4536 kg/lb x 1000 g/kg = 743.904 g

Now, to convert grams to milligrams, we know that there are 1000 milligrams in one gram:

743.904 g x 1000 mg/g = 743904 mg

Thus, 1.64 pounds is equivalent to 743.904 grams or 743904 milligrams.

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Answer:

                     M.Mass = 120 g/mol

Explanation:

Data Given:

                  Volume = V = 0.0650 L

                  Temperature = T = 547 °C = 820.15 K

                  Pressure = P = 70.5 kPa = 0.695 atm

                  Gas Constant = R = 0.082057 L.atm.mol⁻¹.K⁻¹

Formula Used:

                        Assuming that the gas is ideally then according to ideal gas equation,

                                   P V = n R T

Solving for n,

                                   n = P V / R T

Putting Values,

    n = (0.695 atm × 0.0650 L) ÷ (0.082057 L.atm.mol⁻¹.K⁻¹ × 820.15 K)

    n = 6.71 × 10⁻⁴ moles

Now, Knowing that,

                                  Moles  =  Mass / M.Mass

Or,

                                  M.Mass = Mass / Moles

Putting values,

                                  M.Mass = 8.06 × 10⁻² g / 6.71 × 10⁻⁴ mol

                                  M.Mass = 120 g/mol

Answer:

A. While inconsistent, his average of 1.0 kg made his results quite

accurate

Explanation:

Accuracy is how close the value you gain from test or observation compared with the real value. In this test, all tests relatively close to 1kg and the average of the test is 1kg so this tool can be considered quite accurate.

The precision determines how close the value of multiple repetitions of the test. In this case, the value varies from 0.8kg to 1.2kg. The highest value is about 50% higher than the lowest value, so the range is pretty far and the test can be considered not precise.

Answer:

the answer is water

Explanation:

because abiotic means non living and all of the other things are living

The correct answer is option c)The rabbit population would get smaller because of decreased competition with the deer population.

The likely impact of a disease causing one-fourth of the deer population to die on the rabbit population can be understood through the ecological dynamics within the food web. Deer and rabbits share the same trophic level as herbivores, both relying on producers like grass and plants for sustenance. If a disease significantly reduces the deer population, it would result in decreased competition for resources, particularly food, among herbivores.

In this scenario, option C is the most plausible: "The rabbit population would get smaller because of decreased competition with the deer population." With fewer deer consuming the same resources, such as plants and grass, the rabbits may experience a decline in competition for these food sources. This might lead to an apparent reduction in the rabbit population.

It's crucial to consider the intricate connections in the ecosystem. While decreased competition might initially benefit the rabbit population, other factors such as changes in predator-prey relationships or alterations in the vegetation structure could influence the long-term dynamics.

Therefore, due to decreased competition for resources with the declining deer population, the rabbit population is likely to get smaller (Option C).

Answer:

Sunlight travels through space without the aid of fluids or solids.

Explanation:

By definition, radiation is transfer of heat without a medium.

All other options are have convection involved in them, not radiation.

Answer:

Sunlight travels through space without the aid of fluids or solids

Explanation:

Answer:

Explanation:

A. Metals are shiny, usually solid at room temperature, malleable, ductile, and highly conductive. In contrast, ionic compounds are brittle. Molecular compounds are often gases at room temperature.

b. Metals have very few valence electrons. Their outermost p-orbitals are empty. This allows their electrons (including those from their d-orbitals) to move freely between metal atoms. The movement of electrons is electricity, so this mobile "sea of electrons" is what causes metals' conductivity.

Answer:

Atoms form chemical bonds to make their outer electron shells more stable. ... An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons.

Explanation:

Answer:

D.

Bonding gives an atom the same number of electrons as a noble gas.

Explanation:

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