Can someone pls help me on this

Answer:

pubchem

Explanation:

i know i'm in college

but you can look it up

Answer:

The government allocates a budget for research every year. The spending of that money is determined by government priorities. Some of the money is spent directly, in government-funded research centers.

Other money is distributed to other research institutions.

Money spent by other institutions for research has no government oversight.

Explanation:

It requires 7458 calories of heat to raise the temperature of 225 grams of water from 10.5°C to 43.7°C.

To calculate the amount of heat required to raise the temperature of a substance, we can use the formula Q = m * C * ΔT, where Q represents the heat, m is the mass of the substance, C is the specific heat capacity, and ΔT is the change in temperature.

In this case, we have 225 grams of water, a specific heat capacity of 1.00 cal/g°C, and a temperature change of 33.2°C (from 10.5°C to 43.7°C).

Plugging these values into the formula:

Q = 225 g * 1.00 cal/g°C * 33.2°C

Q = 7458 cal

Therefore, it requires 7458 calories of heat to raise the temperature of 225 grams of water from 10.5°C to 43.7°C.

This calculation is based on the specific heat capacity of water, which is the amount of heat energy required to raise the temperature of water by 1°C per gram. The specific heat capacity of water is relatively high compared to other substances, which is why it takes a significant amount of heat to raise its temperature.

It's important to note that the specific heat capacity of water can vary slightly with temperature, but for practical purposes, we often assume a constant value of 1.00 cal/g°C.

By using the given values and the formula for heat, we can accurately determine the amount of heat required for this specific temperature change in the given mass of water.

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Answer: The new volume is 544 L

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)

where,

\(V_1\text{ and }T_1\) are the initial volume and temperature of the gas.

\(V_2\text{ and }T_2\) are the final volume and temperature of the gas.

We are given:

\(V_1=605L\\T_1=27.0^oC=(27.0+273)K=300K\\V_2=?\\T_2=-3.0^0C=(273+(-3.0))K=270K\)

Putting values in above equation, we get:

\(\frac{605}{300}=\frac{V_2}{270}\\\\V_2=544L\)

Thus the new volume is 544 L

Answer:

545 L

Explanation:

As a result, when the gas is cooled to a temperature below 45 °C, it will condense into a liquid condition. The pressure affects the precise temperature at which the gas will condense.

The slope of the solid-liquid equilibrium line for carbon dioxide is positive; when pressure is increased, the melting point rises.

Three triple points exist (a). (b) In an atmosphere, monoclinic is more stable than rhombic. (c) Sulfur changes state from liquid to vapour and back to liquid when heated from 80°C to 200°PC.

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The 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min and 89.6 min.

The 95% confidence interval estimate is calculated based on the sample mean and the standard deviation. In this case, the sample mean wake time after treatment is 83.1 min, and the standard deviation is 20.7 min. With these values, we can construct the confidence interval estimate.

The formula for calculating the confidence interval estimate is:

CI = sample mean ± (critical value * standard deviation / square root of sample size)

Using a 95% confidence level, the critical value is 1.96. The sample size in this case is 21.

Plugging in the values:

CI = 83.1 ± (1.96 * 20.7 / √21)

Simplifying the equation:

CI = 83.1 ± 8.08

Therefore, the 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min (83.1 - 8.08) and 89.6 min (83.1 + 8.08).

This result suggests that the mean wake time before the treatment, which was 105.0 min, is outside the confidence interval estimate. The confidence interval estimate does not include the value of 105.0 min, indicating that the mean wake time with the drug treatment is significantly different from the mean wake time before the treatment.

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2C4H10 + 13O2 Right arrow. 8CO2 + 10H2O

What is the mole ratio of butane to carbon dioxide?

ANSWER:

Butane is an organic compound with the formula C4H10 and carbon dioxide is compound (gas) with the formula CO2. So, the balanced coefficient of butane is 2, and that of carbon dioxide is 8. According to thid, the mole ratio of butane to carbon dioxide is 2:8 or 1:4.

Answer:

answer is 2:8 or 1:4

Explanation:

According to the question the number of moles of CO₂(g) produced in the reaction is 1.18 mol.

Moles are small, burrowing mammals found throughout much of the world. They are classified as insectivores, meaning they are specialized in eating insects. Moles have long, cylindrical bodies, short limbs, and large, clawed feet adapted for digging. Their fur is usually black to gray, though some species may have a light brown or yellowish color. They have small eyes and ears, and their noses are long and sensitive, used to detect prey and other objects in their environment.

The ideal gas law can be used to calculate the number of moles of CO₂(g) produced in the reaction. The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Since the volume and temperature are known, we can rearrange the equation to solve for n:
n = PV/RT
At the beginning of the reaction, the pressure is 0 and the volume is 4.3 L, so the number of moles of CO₂(g) is 0.
At the end of the reaction, the pressure is 5 atm and the volume is still 4.3 L. Plugging these values into the equation gives us:
n = (5 atm)(4.3 L)/(0.08206 L·atm/mol·K)(298K) = 1.18 mol CO₂(g)
Therefore, the number of moles of CO₂(g) produced in the reaction is 1.18 mol.

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Answer:

the moon is the earths natural satellite.

Explanation:

A natural satellite is in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are often colloquially referred to as moons, a derivation from the Moon of Earth.

Given, Manganese dioxide (MnO2) = 28gHydrochloric acid (HCl) = 42g

To find, Theoretical yield of Cl2, We will find the limiting reagent and use its mole to find the theoretical yield of Cl2.MnO2 + 4HCl → MnCl2 + 2H2O + Cl2First we will find the limiting reagent.

The number of moles of MnO2 is, Moles of MnO2 = Mass/Molar mass = 28/86.94 = 0.322 mol The number of moles of HCl is, Moles of HCl = Mass/Molar mass = 42/36.46 = 1.151 mole will use the mole ratio of MnO2 and HCl to find the mole of Cl2. The mole of HCl required to react with 0.322 mol of MnO2 = 0.322 x 4 = 1.288 mol The number of moles of Cl2 will be, Moles of Cl2 = 0.322 x 1 / 4 = 0.0805 mol. The theoretical yield of Cl2 from the given reactants is,

Theoretical yield of Cl2 = Moles x Molar mass = 0.0805 x 70.9 = 5.71 g Chlorine gas will be produced with a theoretical yield of 5.71 g when 28 g of MnO2 and 42 g of HCl are mixed.

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Answer:

Groundwater and soil water can interact if the groundwater is relatively close to the soil root zone.

Explanation:

Answer:

Explanation:

The correct answer is

energy resulting from the flow of charged particles , such as electrons or ions.

hope it helps :)

Answer:

B

Explanation:

gamma rays have the shortest wave length

Infrared, visible light and gamma rays are lists of the waves in order of wavelength, from longest to shortest. Hence, option B is correct.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.

Hence, option B is correct.

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Answer:

A.) 1:1

Explanation:

You can determine the mole ratio between substances by comparing their coefficients in the balanced equation. Both Cl₂ and Br₂ have coefficients of 1. Therefore, they have a 1 to 1 (1:1) relationship.

If you were comparing the mole ratio of Cl₂ and NaBr, they would have a 1:2 relationship because Cl₂ has a coefficient of 1 and NaBr has a coefficient of 2.

Answer:

When two or more atoms chemically bond together, they form a molecule. The bonds between the two hydrogen atoms and the oxygen atom in a molecule of water are covalent bonds.

Explanation:

Explanation:

yes its hard if you don't pay attention.

Yes, the math is harder but chemistry is not it's really fun the math does get harder tho.

Answer:

did you mean to add or attach a paper to this? We need more info to help

Explanation:

Answer:Mars, earth, Uranus and Jupiter

Explanation:

To find the volume, known grahams law of diffusion.

What is grahams law of diffusion?

The rate of diffusion or effusion of a gas is inversely related to its square root of molar mass, according to Graham's Law. The majority of the time, particles in a material that are in a low-concentration area will move to a high-concentration area. When we spray scented air freshener or perfume in one area of the room and then we can smell it throughout the entire space, this process is easily illustrated. The SI unit for the diffusion coefficient is square meters per second (m2/s).

What is Volume ?

The amount of cubic space a three-dimensional object takes up (measured in inches, quarts, or centimeters): square footage.

Therefore, the same volume of helium to pass through the hole under the same conditions will be same.

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Answer:

this is about that.

Answer:

C.

Explanation:

The equation that represents a single replacement reaction given the various options is 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

A single replacement reaction, also known as single displacement reaction is a reaction in which elements higher in the electro-chemical series displace or replace elements lower in the electro-chemical series displace from a solution.

The following example illustrates single replacement reaction:

A + BC -> AC + B

From the above reaction, we can see that A has replace/displace B to from AC.

With the above information, we can determine the equation that represents single replacement reaction. Details below:

Equation from the questions:

From the above, we can see that only 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) conform to single replacement reaction.

Thus, the correct answer to the question is: 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

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Atoms bond to reach a lower energy state. That is to say, the atoms that are loose are not stable and for this reason they unite forming the compounds and in this way they gain stability.

A chemical bond occurs when atoms share electrons.

A covalent bond is a force that joins two atoms of non-metals.

If you have Br_{2}

Atoms of the same element participate and have a bond.

Given its electronic configuration:

\( \sf1s {}^{2} \: \: 2 {s}^{2} \: \: 2 {p}^{6} \: \: 3 {s}^{2} \: \: 3 {p}^{6} \: \: {4s {}^{2}} \: \: {3 {d}^{10 \: } \: \: {4 {p}^{5}} }\)

Adding the electrons of the energy sublevel indicates that bromine (Br) has 7 electrons in its last energy shell.

And that it lacks an electron to comply with the OCTET RULE (this indicates that incomplete atoms try to complete the electrons by forming chemical bonds).

But when joining both would be sharing an electron, thus completing its octet. Through this transfer of electrons where one of the atoms gives up electrons and the other accepts them, to have the same electronic configuration of the closest noble gas in the periodic table (in this case to Krypton).

Answer:

D

Explanation:

My logic: Electricity produces heat, chemical reactions produce heat. And so on.

Answer: A:Radition

Explanation:

Answer:

In the process of baking bread, the chemical reaction happens because by consuming the sugar, the yeast has created new substances—carbon dioxide and ethanol.

Explanation:

Brainliest please! I am so close to getting my next ranking! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!

Answer:

A.) Speed up

Explanation:

Heat is directly proportional to kinetic energy which happens when the particles are moving very quickly. This means that more speed = more heat.

Answer:

A

Explanation:

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.

Answer:  Shaun must consume 6 more g of protein to reach the required amount.

Explanation:

Given : Recommended amount of protein = 200 calories

Now 4 calories = 1 gram of protein

Thus 200 calories = \(\frac{1}{4}\times 200=50\) g of protein.

Calories consumed per day by Shaun = 176 calories

176 calories =  \(\frac{1}{4}\times 176=44\) g of protein.

Thus Shaun need to consume = (50-44) g = 6 of protein to reach the required amount.

Shaun must consume 6 more g of protein to reach the required amount.

The strong electrolytes among the given choices are HCl, HC2H3O2, and KCl.

In the given options, HCl and KCl are both ionic compounds. They contain a cation (H+ or K+) and an anion (Cl-). When these compounds dissolve in water, the ions get separated and move freely in the solution. Therefore, HCl and KCl completely dissociate into ions and are strong electrolytes.

On the other hand, HC2H3O2 (acetic acid) and NH3 (ammonia) are weak electrolytes. They partially dissociate into ions and also exist in the molecular form in the solution. Therefore, they are not strong electrolytes. In conclusion, HCl, HC2H3O2, and KCl are the strong electrolytes among the given choices.

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Answer:

People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.

I hope this helps!

The mass of air in the scuba tank is 841.614 g.

Using the ideal gas equation;

PV=nRT

P = pressure of the gas = 195 kPa

V = volume of the gas =  350 L

n = Number of moles of the gas = ??

R = molar gas constant = R = 8.314 J K-1 mol-1

T = temperature of the gas =  10 °C or 283 K

n = PV/RT

n = 195 * 350/8.314 * 283

n = 68250/2352.862

n = 29.00 moles

Number of moles = mass/molar mass

mass of air = Number of moles * molar mass

mass of air = 29.00 moles * 29g/mol

Mass of air = 841.614 g

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