My science exam is due tomorrow and I HAVE LIMITED TIME. can someone help me how to absorb anything you read and memorize it...

Answer:

The solid crystals disappeared

Explanation:

When a soluble solid solute is added to water, the solid solute disappears after a little while. The disappearance of this solute indicates that the solute has been dissolved in water.

In this case, blue copper sulphate crystals are added to water, the blue crystals disappear leaving only a blue solution. The disappearance of these blue copper sulphate crystals indicates that the substance has dissolved in water.

The melting point of gold is 1947°F. This temperature in degrees Celsius 1063.889°C and in kelvin is 1337.039K.

Temperature is a physical quantity that quantifies our feelings of hotness and coldness. A thermometer is used to measure temperature.

According to the International System of Units, the SI unit of temperature is Kelvin, which is represented by the symbol K. In the fields of science and engineering, the Kelvin scale is widely accepted or used. However, in most parts of the world, temperature is measured using the Celsius or Fahrenheit scale.

Thus, The melting point of gold is 1947°F. This temperature in degrees Celsius 1063.889°C and in kelvin is 1337.039K.

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Answer: Science : Chemistry, astronomy , biology , physics , biology ,geology. Notscience : Astrology and theology

Explanation: Astrology and theology are non scientific areas of study.

Answer:

because it's soaked in a mix of alcohol and water

Explanation:

the bill absorbs the water and the alcohol burns off

Answer:

significantly increase human productivity

Explanation:

hope this help

Answer:

8.0 g

Explanation:

To convert moles to grams, you need to use the molar mass.  The molar mass of sulfur is 32.06.  The molar mass is the atomic mass of the atom.

(0.25 mol) × (32.06 g/mol) = 8.015 g

Round for significant figures.

8.015 g ≈ 8.0 g

Answer:

Viscosity

Explanation:

Sijui kuexpalain lakini

Answer:

Explanation:

apart from boiling point and flammability viscosity density and solubility are those qualities of hydrocarbon which are effected by their size

The molarity of the dilute NaOH prepared by diluting 5.00 ml of 9.257 m NaOH to a final total volume of 100.00 ml is 0.1038 M.

Molar fixation, otherwise called molarity, amount focus, or substance fixation, is a unit used to depict how much a substance in an answer communicated as a level of its volume. The quantity of moles per liter, meant by the unit sign mol/L or mol/dm3 in SI units, is the most frequently involved unit indicating molarity in science. One mol/L of an answer's focus is alluded to as one molar, or 1 M.

The complete number of moles of solute in a specific arrangement's molarity is communicated as moles of solute per liter of arrangement. The volume of a solution is influenced by changes in the system's physical conditions, such as pressure and temperature, in contrast to mass, which changes with changes in the system's physical circumstances. The letter M, also referred to as a molar, stands for molarity. The solution has a molarity of one when one gram of solute dissolves in one liter of solution.

M1V1 = M2V2

Here

M1= 2.076 M

V1= 5.00 ml

M2= ?

V2= 100 .00 ml

Then;

M1V1 = M2V2

2.076 x 5.00  = M2 x 100.00

M2= 0.1038 M.

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This is a perfect answer

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The correct answer is B. Using adhesive tape on a pressurized oxygen tank can cause an explosion. This is because the adhesive tape may not be able to withstand the pressure of the tank and may break, causing a leak or an explosion.

It is important to use only approved materials for sealing or securing oxygen tanks. Using unapproved materials such as adhesive tape may cause severe injuries or even fatalities. Therefore, it is crucial to always follow the manufacturer's instructions and guidelines when dealing with pressurized oxygen tanks. Using adhesive tape may also cause oxygen contamination, which can be harmful to patients who rely on oxygen therapy.
The correct answer to your question is:

B. an explosion.

Using adhesive tape on a pressurized oxygen tank is dangerous because it can create a potential source of ignition. When the adhesive comes into contact with high-pressure oxygen, it can react violently, possibly leading to an explosion. To ensure safety, it's crucial to avoid using adhesive materials on pressurized oxygen tanks and follow proper handling guidelines.

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Answer: When ammonia is passed throughFeSO4 solution, Fe3+ gets precipitated giving dirty green colour.

Explanation Due to theformation of ammonobasic mercuric nitrate and finely divided mercury,ammonia turns Mercurous nitrate paper black when passed through it.

Answer:

radioactive decay

Explanation:

The cinematic allows finding that Elizabeth is the first to hear the sound, Samantha is the second person to hear the explosion and Fulton the last, since he has the time in the air plus the transformation time of the sound in the headphones.

When an object explodes, a sound wave of great intensity is produced, this wave propagates through the different media with which it is in contact.

The speed of sound in each medium is given by the expressions

          v = \(\sqrt{\frac{B}{\rho } }\)

Where B is the volumetric modulus, ρ the density of the medium.

Sound is a wave so its velocity is constant, so we can use the kinematic relationships for uniform motion

            \(v = \frac{d}{t} \\t = \frac{d}{v}\)

Some values ​​of interest for the speed of sound are

Medium          speed (m / s)

air                          340  

liquid            order of 1500  

Solids           order of 4000

In this exercise, the three students are at the same distance, so Elizabeth who hears the explosion through the ground ( solid) should be the person who first hears it.

For the other two students the time difference must be small, Samantha hears the explosive that is transmitted in the air.

Fulton uses headphones, so the explosion must excite a bugle that transforms the sound into signals for the headphones and again transforms it into audible signals.

The headphones are next to it. The time of the signal is the time in the air plus the time of the electrical signal, so you should hear the sound after Samatha.

In conclusion using the kinematics we can find that Elizabeth is the first to hear the sound and possibly Samantha is the second person to hear the explosion and Fulton the last since he has the time in the air plus the transformation time.

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Answer:

A and D

Explanation:

It might seem like B and D but I took the test and it's A and D.

Answer:

591.471 MILLIMETERS

Explanation:

Formula  

for an approximate result, multiply the volume value by 29.574

29.574*20=591.471

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Miss Hawaii ; )

Answer:

inclined plane ; is that device.

The vapor pressure of the solution containing 15.0 g of decanoic acid in 75.0 g of benzene is approximately 68.85 torr.

To calculate the vapor pressure of the solution, we need to determine the mole fraction of benzene in the solution and use Raoult's Law.

First, calculate the moles of benzene:

moles of benzene = mass of benzene / molar mass of benzene

moles of benzene = 75.0 g / 78.11 g/mol = 0.960 mol

Next, calculate the moles of decanoic acid:

moles of decanoic acid = mass of decanoic acid / molar mass of decanoic acid

moles of decanoic acid = 15.0 g / 172.26 g/mol = 0.087 mol

Calculate the total moles of the solution:

total moles of solution = moles of benzene + moles of decanoic acid

total moles of solution = 0.960 mol + 0.087 mol = 1.047 mol

Calculate the mole fraction of benzene:

mole fraction of benzene = moles of benzene / total moles of solution

mole fraction of benzene = 0.960 mol / 1.047 mol = 0.918

Using Raoult's Law, we can calculate the vapor pressure of the solution:

vapor pressure of the solution = mole fraction of benzene × vapor pressure of pure benzene

vapor pressure of the solution = 0.918 × 75 torr = 68.85 torr

Therefore, the vapor pressure of the solution containing 15.0 g of decanoic acid in 75.0 g of benzene is approximately 68.85 torr.

The correct question is:

The vapor pressure of benzene (C₆H₆) at 20°C is 75 torr. What is the vapor pressure of a solution containing 15.0 g of the nonvolatile solute decanoic acid (C₁₀H₂₀O₂) in 75.0 g of benzene?

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Answer:

2L

Explanation:

Answer:

2 Liters is equal to 2,000 mL

Explanation:

In one liter, there is 1,000 milliliters. Therefore, 2 liters is equal to 2,000 milliliters.

Hope this helped!

When objects are in contact, energy is transferred through conduction. The correct answer is option A.

Energy is a fundamental quantity that is defined as the ability of a system to do work or produce heat. It is a scalar quantity and is measured in joules (J).

Conduction occurs when the particles in one object collide with the particles in another object, resulting into transfer of energy from the warmer object to the cooler object. This transfer of energy continues until the two objects reach thermal equilibrium, or the point at which they have the same temperature.

Therefore, option A. conduction is a process through which energy is transferred when objects are in close contact.

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Out of the four objects listed, the radiocarbon dating technique could not be used on the gold statue.

This is because radiocarbon dating is a method used to determine the age of organic materials that were once alive, such as bone, wood, and fur.

However, gold is an inorganic material that does not contain carbon and therefore cannot be dated using radiocarbon techniques.

The other three objects, including the human femur, well-preserved animal fur, and wooden box, are all organic materials that could potentially be dated using radiocarbon methods.

It is important to note that while radiocarbon dating can provide valuable information about the age of organic objects,

the accuracy of the technique can be impacted by a variety of factors, including contamination, sample size, and calibration of the method.

Additionally, it is always important to consider other forms of dating and analysis in conjunction with radiocarbon dating to build a complete understanding of the object or site being studied.

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Carbon dioxide molecules can absorb and emit infrared radiation, and they are one of the most abundant constituents of Earth's atmosphere.

Thus, the correct options are:d) Are one of the most abundant constituents of Earth's atmospheree) Can move in many ways, thus absorbing and emitting infrared radiation

Carbon dioxide is a trace gas present in the Earth's atmosphere. It's a vital component of Earth's carbon cycle, which helps to regulate Earth's temperature and support life as we know it. Carbon dioxide molecules are one of the most common gases in the atmosphere, accounting for around 0.04% of the Earth's atmosphere.

The greenhouse effect is caused by carbon dioxide, methane, and other greenhouse gases. When the Sun's energy reaches the Earth's surface, it is absorbed and then radiated back into space as infrared radiation. Greenhouse gases absorb this radiation and trap it in the atmosphere, which causes the Earth's temperature to rise and the climate to change.

Carbon dioxide molecules are capable of absorbing and emitting infrared radiation due to their molecular structure, which consists of one carbon atom and two oxygen atoms. This property of carbon dioxide is the main reason it's classified as a greenhouse gas.

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The reaction that is described in the question is a nuclear reaction because a change has occurred in a nucleus.

The term nuclear reaction  has to do with a reaction in which there is a transformation of the nucleus of an atom.

As such, the reaction that is described in the question is a nuclear reaction because a change has occurred in a nucleus.

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Answer:

C

Explanation:

Edge 2022

Answer: can I suck your super long di ck or titis

Explanation:

Answer:

hi

Explanation:

The approximate final temperature of the water when the hot piece of metal is placed in the water is 70°C.

Using the terms provided, we can calculate the approximate final temperature of the water using the formula for heat transfer: Q = mcΔT, where Q is the heat transferred (8400 J), m is the mass of water (200 g), c is the specific heat capacity of water (4.18 J/g°C), and ΔT is the change in temperature.

First, we need to find the change in temperature (ΔT) by rearranging the formula: ΔT = Q / (mc). Plugging in the values, we get ΔT = 8400 J / (200 g * 4.18 J/g°C) ≈ 10°C.

Now, add this change in temperature to the initial temperature of the water: Final temperature = Initial temperature + ΔT ≈ 60°C + 10°C = 70°C.

The approximate final temperature of the water is 70°C.

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The mass of the products was the same as that of the reactants helped Antoine Lavoisier found that mass was conserved in chemical reactions.

It is widely acknowledged that Lavoisier's major contributions to chemistry were greatly influenced by his shift from a qualitative to a quantitative approach to the field.

Most people know Lavoisier for his discovery of the function of oxygen in combustion. He challenged the phlogiston idea and recognized and called oxygen (1778) and hydrogen (1783). Lavoisier created the first comprehensive list of elements, contributed to the development of the metric system, and reformed chemical nomenclature. He observed that although matter can change its form or shape, its mass always remains the same (1787) and anticipated the development of silicon.

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Answer:

The answer is Magnesium

Answer:

If this is for the "functional groups" question:

1. aldehyde

2. ketone

3. ester

4. carboxylic acid

Explanation:

Got them all right on edge.

The drop-down menus to identify the names of the structures in the table to the right

1. Aldehyde

2. Ketone

3. Ester

4. Carboxylic acid

A functional group in organic chemistry is a pool of atoms within molecules which bind jointly to react in predicted ways.

Examples of functional groups contain the group hydroxyl, ketone, amine, and ether.

Thus, these are the drop down menus.

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We need to use 1 mL of diluent to make a 2 mL of tobramycin 8% solution using 1 mL of tobramycin 16% stock solution.

To prepare 2 mL of tobramycin 8% solution using 1 mL of tobramycin 16% stock solution, follow these steps:
1. Determine the total amount of tobramycin needed in the 8% solution: 2 mL x 8% = 0.16 g
2. Calculate the amount of tobramycin present in the 1 mL of 16% stock solution: 1 mL x 16% = 0.16 g
3. Compare the tobramycin amounts in the desired solution and the stock solution. In this case, they are equal (0.16 g), meaning you can achieve the desired concentration by diluting the stock solution.
4. To determine the amount of diluent needed, subtract the volume of the stock solution from the desired final volume: 2 mL (final volume) - 1 mL (stock solution) = 1 mL
So, you will need to use 1 mL of diluent to make 2 mL of tobramycin 8% solution. Your answer: 1 mL.

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