Students in a robotics class designed cars to race as their end of the year project. Students collected data on their cars and compared their individual data before the final race. The mass and the force applied to each car is recorded in the table below. Based on this information which car has the greatest acceleration? *

A sample of gas at 2815 torr is cooled from 150.0 C to 100.0 C. Assuming the volume is constant, 2482.2torr is the pressure in atm of the gas at 100.0 C.

The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure (symbol: p / P). The pressure in relation to the surrounding air pressure is known as gauge pressure, also spelt gauge pressure.

Pressure is expressed using a variety of units. Some of these are calculated by dividing a unit of force by a unit of area; for instance, the metric system's unit of pressure, a pascal (Pa), is equal to one newton / square metre (N/m2).

P₁/T₁=P₂/T₂

2815 ×373/423=2482.2torr

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The mass of hydrogen in the balloon 10m in diameter is 0.419 grams.

To calculate the mass of hydrogen in a balloon with a 10m diameter, filled at a pressure of 1 standard atmosphere and a temperature of 27°C, we can use the ideal gas law.

Convert the diameter of the balloon to its radius:

Radius = Diameter / 2

= 10 m / 2

= 5 m

Calculate the volume of the balloon:

Volume = (4/3) * π * (\(Radius^{3}\))

Volume = (4/3) * 3.14159 * (\(5^{3}\)) = 523.599 m³

Convert the temperature from Celsius to Kelvin:

Kelvin temperature = Celsius temperature + 273.15

Kelvin temperature = 27°C + 273.15 = 300.15 K

Convert the pressure to Pascals (Pa):

1 atm = 101325 Pa

Determine the number of moles of hydrogen using the ideal gas law:

PV = nRT

n = PV / RT

Where:

P = Pressure = 1 atm = 101325 Pa

V = Volume = 523.599 m³

R = gas constant = 8.314 J/(mol·K)

T = Temperature = 300.15 K

n = (101325 Pa) * (523.599 m³) / ((8.314 J/(mol·K)) * (300.15 K))

n ≈ 21927.41 mol

Convert moles to grams using the molar mass of hydrogen:

Molar mass of hydrogen (H₂) = 2 g/mol

Mass of hydrogen = n * (Molar mass of hydrogen)

Mass of hydrogen = 21927.41 mol * 2 g/mol

Mass of hydrogen ≈ 43854.82 g

Therefore, the mass of hydrogen in the balloon 10m in diameter is 0.419 grams.

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Answer:

Testing of thesis testing is used to determine the plausibility of a thesis.

The test assess the plausibility of the thesis of a sample data.

It occurs through different way, the first step is used to test the state the two suppositions.

In the coming step evaluation of data, third step include carry out plan and dissect the data.

The final step is to dissect the results of the data, it can moreover accept the thesis and reject the null thesis.

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Answer:

mm hola hablas español??????

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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The most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Option B)

Based on the given context, the word that best fits the sentence is "likely."

The sentence implies that the speaker doubts the boss's willingness to agree with something. In this case, "likely" expresses the probability or possibility of the boss agreeing. It suggests that the boss is not expected to be receptive or open to the idea.

"Probable" implies a higher degree of certainty or likelihood, which may not be suitable in this context since the sentence indicates skepticism about the boss's agreement.

"Suitable" means appropriate or fitting, but it does not convey the sense of agreement or willingness.

"Talkative" refers to someone who is inclined to talk a lot, which is unrelated to the boss's agreement.

Therefore, the most suitable choice is "likely" to convey the doubt or uncertainty regarding the boss's willingness to agree. Hence option B) is correct.

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Answer:

0.31 g

Explanation:

What is the mass of 2.3 x 1021 atoms of bromine?

1.8 x 1023 g

1.7 x 1043 g

0.31 g

3.4 x 1012

1 mole of Br atoms weigh 80 gm and contain 6.022 X 10^23 atoms

? gm contain 2.3 X 10^21 atoms

set up a ratio

80/(6.022 X 10^23) = ?/ (2.3 X 10^21)

?=80 X (2.3 X 10^21)/(6.O22 X 10^23)

? = 8O X (2.3/6.022) X 1 0^-2

? =0.306 gm

so the answer is

0.31 g

Answer:

liquefaction

liquefaction is a process when a something turns into a liquid.

Explanation:

Sink- followed by a large amount of water Waste Bucket: Hydrochloric acid solution, Sodium hydroxide solution

Laboratory chemical waste can be disposed of in one of three ways: Non-hazardous waste should be disposed of in a sanitary sewer or garbage; sewer disposal should come after acid-base neutralization. Note:To be permitted, any other form of therapy must be incorporated within an experimental process.

There are several categories into which this garbage might be divided: dangerous, medical, biological, electrical, and lab. Reducing laboratory waste will provide a number of advantages, including monetary savings, lower disposal expenses, and increased lab safety.

The environment, the public's health, and the laboratory itself can all be harmed by improper laboratory waste disposal. The Laboratory: If it is discovered that a laboratory is unlawfully disposing of their hazardous waste, the EPA levies severe fines and penalties.

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An acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76.

The pH range over which an acetate buffer can effectively maintain pH depends on the pKa of the acid used and the concentration ratio of the acid to its conjugate base (acetate ion). Acetate buffer solutions are commonly prepared using acetic acid (CH3COOH) and sodium acetate (CH3COONa).

The pKa of acetic acid is approximately 4.76. In general, a buffer is most effective when the pH is within one unit of its pKa. Therefore, an acetate buffer would be most effective in maintaining pH within a range of approximately 3.76 to 5.76

Outside this pH range, the buffer may not effectively resist changes in pH, as the concentration of the acid and its conjugate base will be significantly imbalanced. At lower pH values, the acid concentration will dominate, while at higher pH values, the concentration of the acetate ion will dominate, leading to a diminished buffering capacity.

However, it's important to note that the exact pH range over which an acetate buffer can maintain pH effectively may vary depending on the specific concentration and preparation of the buffer solution.

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Answer:

In food systems, the continuous phase is usually a liquid with added solids or  beaten egg white and sugar foam is a gas in the liquid dispersion. ... egg white foam is an example of this. air bubbles (disperse phase are ... a colloid is a type of chemical mixture where one substance is dispersed evenly throughout.

Explanation:

Answer:  

Here is a picture of all the elements

Answer:

The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Explanation:

PLEASE MARK ME AS BRAINLIEST

This exercise is related to the subject of Structured Thinking. See the definition of structured thinking below.

The process of developing a structured framework to address an unstructured situation is known as structured thinking.

Structured thinking is a strategy of problem-solving that entails breaking a huge problem into smaller ones in order to tackle the larger problem more quickly and effectively.

Categorizing things and identifying themes are two subjects under structured thinking.

To categorize anything requires:

Identifying themes entails:

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Answer:

also need help on this one

Explanation:

pls help

Answer:

you can not qq for 12 b

Explanation:

Answer:

Reaction type: Single displacement

Reactant: Magnesium

Product: Dihydrogen - H2

This happens trough the process of exfoliation. And the temperature changes are called thermal stress weathering.

Hope this helps.

Answer:

0.0041 mol

Explanation:

Given data:

Number of formula units = 2.45 × 10²¹ formula units

Number of moles = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions ,formula units and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ formula units

2.45 × 10²¹ formula units × 1 mol / 6.022 × 10²³ formula units

0.41 × 10⁻² mol

0.0041 mol

Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

have a good day!

The change in temperature of silver if 500 J of heat are added to a 23 g sample of silver is 90.5°C.

The change in temperature of a substance can be calculated using the following formula:

Q = mc∆T

Where;

500 = 23 × 0.24 × ∆T

500 = 5.52∆T

∆T = 500 ÷ 5.52

∆T = 90.5°C

Therefore, the change in temperature of silver if 500 J of heat are added to a 23 g sample of silver is 90.5°C.

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You can see that the atomic number of 8 is found in the periodic table which is oxygen.

There are 4 atoms of oxygen in Cu(NO2)2 because the subindex of oxygen is 2 and this is inside of a parenthesis which show us another subindex telling us how many times NO2 is bonded to Cu, which in this case is twice. So, there are 2 x 2 = 4 oxygen atoms.

And for 5 moles of water, you can see that there are five molecules of water and each molecule contains 1 oxygen atom, so it would be 1 x 5 = 5 oxygen atoms.

The final step is sum the oxygen atoms which is 4 + 5 = 9 oxygen atoms.

The answer is C. 9.

Answer:

3.62

Explanation:

Using the Henderson-Hasselbach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO₂ and 0.15 M NaCHO₂. (Ka for HCHO2 = 1.8 x 10⁻⁴) is 3.62. pH is a unitless quantity.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

Using the Henderson-Hassel Bach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO2 and 0.15 M NaCHO2. (Ka for HCHO2 = 1.8 x 10-4) is 3.62.

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Answer:

I guess D ...,...,.....

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Chemists refer to the process of boiling water as endothermic.It follows that since certain processes need heat, others must also produce heat as they operate.They are referred to as exothermic.

The water is not performing any chemical reactions when it boils.Even while it boils, the water is still.Simply put, the temperature has altered. Water molecules may undergo phase shifts as it continues to boil, gaining enough energy to vaporize as it does so.

Boiling water causes a physical, not a chemical, alteration in the substance.Hydrogen and oxygen do not separate from water molecules.Instead, the links between molecules in water break, enabling them to transition physically from the a liquid to a gas.

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Answer:

C

Explanation:

i did the test

The theoretical yield of I2 in the reaction would be 0.23 g

This refers to the stoichiometric yield of a reaction.

From the equation of the reaction:

Ca(IO3)2 + 10 KI + 12 HCl → 6 I2 + CaCl2 + 10 KCl + 6 H2O

The mole ratio of Ca(IO3)2 and I2 is 1: 6

Mole of 15.00 mL, 0.0100 M Ca(IO3)2 = 15/1000 x 0.0100

                                                              = 0.00015 mole

Equivalent mole of I2 = 0.00015 x 6

                                      = 0.009 mole

mass of 0.0009 I2 = 0.0009 x 253.809

                                = 0.23 g

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Answer:

I can't see any picture?????

Yes, that statement is generally correct. A scientific law is a statement that describes a phenomenon or pattern in nature, often expressed mathematically, without attempting to explain why it occurs. A scientific theory, on the other hand, is a well-substantiated explanation for a set of phenomena, based on empirical evidence and scientific reasoning.

A scientific law summarizes what happens in a particular situation, often in the form of an equation or formula, whereas a scientific theory attempts to explain why it happens.

For example, the law of gravity describes the attraction between masses, but it does not explain why this attraction occurs. In contrast, the theory of general relativity attempts to explain the underlying principles of gravity, including its effects on the curvature of space-time.

It's worth noting that both scientific laws and scientific theories are based on empirical evidence, but they serve different purposes in scientific inquiry. Laws describe what happens in a particular situation, while theories attempt to explain why it happens.

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