Please help me ty! Correct answers only ty

Answer: C

Here is how I used Process of Elimination:

An hypothesis is your guess before you conduct the experiment.

An inquiry is when you ask for information.

A law is a statement based on repeated experiments.

The answer had to be conclusion.

Hope it helps!

Answer:

Kerosene

Explanation:

You use process of elimination in this question

None of them except for Kerosene can power a bulb

Explanation:

sodium chloride

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Answer:

When your body moves it uses muscles, which contract and convert chemical energy (glucose) into mechanical and thermal energy.

Explanation:

Muscles are responsible for movement in the body. They are made up of specialized cells called muscle fibers, which contain proteins that can contract and generate force. When you move your body, your muscles contract and generate mechanical energy that enables movement. At the same time, the chemical energy stored in glucose molecules is broken down through a process called cellular respiration, which releases heat energy. This heat energy is then dispersed throughout your body, raising your body temperature. Therefore, when your body moves, it uses both mechanical and thermal energy generated by muscle contraction and glucose metabolism.

Answer:

57

Explanation:

When determining the resonance position in a tube closed on one end, it is important to repeat the measurements multiple times to ensure accuracy. Typically, two resonance positions are measured, which means two sets of measurements should be repeated.

Each set should consist of at least three separate readings. This will give an average value which can be used to better estimate the resonance position in the tube.

Additionally, measuring the data from two different volumes of the tube can help to further promote accuracy in measuring the resonance position. By repeating the measurements multiple times, the data can be used to construct an estimate of the resonance position in the tube that is more accurate.

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Answer:

soysauce bro

Explanation:

Answer:

trail mix

Explanation:

a heterogeneous mixture is a mixture with non-uniform composition. two or more of the mixture's components must be separate for the mixture to be heterogeneous.

Answer:

50%, pups haven't solidfur

2. DOMINANT FF IS NOT POSSIBLE

Answer:

Electrons

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A difference between the stock solution concentration of chymotrypsin calculated from zero time y-intercepts and the stock solution label information, including inaccuracies in the label information, assumptions made during the calculation, and experimental factors that can affect the reaction rate.

The difference between the stock solution concentration of chymotrypsin calculated from zero time y-intercepts and the stock solution label information could be due to a few possible reasons.

Firstly, it is possible that the stock solution label information is not accurate and the actual concentration of the chymotrypsin in the stock solution is different from what is stated on the label.

Secondly, the calculation of stock solution concentration from zero time y-intercepts assumes that the reaction between the substrate and the enzyme is instantaneously initiated and that there is no time delay between adding the substrate and starting the reaction. However, this assumption may not be entirely accurate, as there may be some lag time between the addition of substrate and the initiation of the reaction.

Thirdly, the calculation may be affected by factors such as temperature, pH, and ionic strength, which can affect the rate of the reaction and the accuracy of the calculation.

There may be several reasons why there is a difference between the stock solution concentration of chymotrypsin calculated from zero time y-intercepts and the stock solution label information, including inaccuracies in the label information, assumptions made during the calculation, and experimental factors that can affect the reaction rate.

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The specific heat of the metal is 0.214 J/g°C.

When a metal and water are mixed in a perfectly insulated container, they reach a final temperature through heat transfer. In this case, the initial temperature of the metal is 93.50°C, while the initial temperature of the water is 23.50°C. The final temperature of the mixture is 33.80°C.

To calculate the specific heat of the metal, we can use the principle of conservation of energy. The heat lost by the metal (Qmetal) is equal to the heat gained by the water (Qwater). The formula for heat transfer is:

Q = m * c * ΔT

Where:

Q is the heat transferred

m is the mass of the substance

c is the specific heat

ΔT is the change in temperature

Let's denote the specific heat of the metal as cm and the specific heat of water as cw. The heat lost by the metal can be calculated as:

Qmetal = cm * mmetal * (Tfinal - Tinitial_metal)

The heat gained by the water can be calculated as:

Qwater = cw * mwater * (Tfinal - Tinitial_water)

Since the container is perfectly insulated, the heat lost by the metal is equal to the heat gained by the water:

Qmetal = Qwater

cm * mmetal * (Tfinal - Tinitial_metal) = cw * mwater * (Tfinal - Tinitial_water)

Rearranging the equation, we can solve for the specific heat of the metal:

cm = (cw * mwater * (Tfinal - Tinitial_water)) / (mmetal * (Tfinal - Tinitial_metal))

Substituting the given values:

cm = (4.18 J/g°C * 105 g * (33.80°C - 23.50°C)) / (175 g * (33.80°C - 93.50°C))

After evaluating the expression, the specific heat of the metal is calculated to be approximately 0.214 J/g°C.

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If the heat capacity of the bomb calorimeter is 9.96 kj/°c, then the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

To determine the amount of heat released from combustion of 2 g of wood, you need to use the formula

Q = C × ΔT Where:Q is the heat released or absorbed in joules (J)C is the heat capacity of the bomb calorimeter (given as 9.96 kJ/°C)ΔT is the change in temperature in degrees Celsius (°C)We can assume that all the heat released from the combustion of the wood is absorbed by the calorimeter, so we can use the heat capacity of the calorimeter to calculate the heat released. Since the calorimeter absorbs the heat, the value of Q will be negative (i.e. the heat is released).

Given: Mass of wood = 2 g Heat capacity of the bomb calorimeter = 9.96 kJ/°C First, we need to calculate the change in temperature. This can be done by measuring the temperature of the calorimeter before and after combustion. Let's assume that the temperature increases by 4.0 °C.ΔT = 4.0 °C Now, we can calculate the heat released: Q = C × ΔTQ = (9.96 kJ/°C) × (4.0 °C)Q = 39.84 kJ

Therefore, the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

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All of the options listed are required for proposing a valid reaction mechanism. The elementary steps must sum to the overall balanced equation, the steps must be physically reasonable, and the rate law must correlate with the experimental rate law.

To propose a valid reaction mechanism, you should consider the following parameters:

1. Elementary steps sum to overall balanced equation: This ensures that the individual elementary steps add up to form the overall reaction, and the mass and charge are balanced in the process.

2. Physically reasonable elementary steps: The proposed elementary steps should be feasible based on known physical and chemical principles, ensuring that the mechanism is realistic.

3. Correlation of rate law with experimental rate law: The rate law predicted by the proposed mechanism should match the experimentally observed rate law, indicating that the mechanism is consistent with the observed behavior of the reaction.

So, all three parameters are required for proposing a valid reaction mechanism.

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Answer: it holds two atoms together in a molecule. During a chemi- cal reaction, some of the bonds in the original molecule break. New bonds form to produce a new substance.

Explanation:

Answer:

2 atoms are held together in a molecule?

Explanation:

Answer:

The volume of basketball is  7216.5 cm³.

Explanation:

Given data:

Radius of ball = 12 cm

Volume of ball = ?

Solution:

We will apply the volume formula of sphere.

V = 4/3 ×π×r³

we know that,

π = 22/7

r = 12 cm

Now we will put the values in formula.

V = 4/3 × 3.14 × (12 cm)³

V =  4/3 × 3.14 ×1728 cm³

V = 7216.5  cm³

Thus, the volume of basketball is  7216.5  cm³.

Answer:

Carbon is in carbon dioxide, which is a greenhouse gas that works to trap heat close to Earth. Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth's temperature, make up the food that sustains us, and provide energy that fuels our global economy. Most of Earth's carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms

Explanation:

Hope it helps. Can you give me BRAINLIEST ANSWER. Thank you

a. The balanced chemical equation for the reaction between Mg and N2 is:

3Mg(s) + N2(g) → Mg3N2(s)

From the equation, we can see that 3 moles of Mg reacts with 1 mole of N2 to produce 1 mole of Mg3N2. The molar mass of Mg is 24.31 g/mol, while the molar mass of N2 is 28.02 g/mol. To determine the mass of N2 required to react with 20 g of Mg, we can use the following calculation:

20 g Mg × (1 mol Mg/24.31 g) × (1 mol N2/3 mol Mg) × (28.02 g N2/1 mol N2) = 30.4 g N2

Therefore, 30.4 g of N2 is needed to completely react with 20 g of Mg.

b. Using the same balanced chemical equation as in part (a), we can see that 3 moles of Mg react to form 1 mole of Mg3N2. The molar mass of Mg3N2 is 100.93 g/mol. To determine the mass of Mg3N2 produced, we can use the following calculation:

20 g Mg × (1 mol Mg/24.31 g) × (1 mol Mg3N2/3 mol Mg) × (100.93 g Mg3N2/1 mol Mg3N2) = 83.4 g Mg3N2

Therefore, 83.4 g of Mg3N2 is produced from 20 g of Mg.

Answer:

what activity

Explanation:

Answer:

heterogeneous

Explanation:

have you ever started to eat veg soup and begin with a spoon full of broth, no veggies,

Then when you get to the end, there are veggies. no broth.

In a homogeneous  mixture, every sample is the same

in a heterogeneous mixture, the composition changes from sample to sample

Yes, the form of glycine used by the human body is D-glycine.

Only the R-group of the amino acid glycine, which includes hydrogen, lacks chirality. Many organic compounds have an inherent chirality that gives birth to a variety of isomers. Glycine is the only natural amino acid that is not chiral at the alpha carbon since R is simply a hydrogen. Four stereoisomers of MetO are possible since it has chiral sulphur and chiral carbon.

With other amino acids, the Val side chain does not create hydrogen bonds. An aliphatic amino acid is isoleucine. Its side chain is aliphatic and has the chemical formula (C4H9). Isoleucine does not create a hydrogen bond since it does not include any electronegative atoms. The thiol group is present in the structure of cysteine.

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Mole is one of the International System of Units' seven foundation units (SI). Therefore, the mole ratio of Fe to CO in the reaction Fe₂O₃+ 3 CO  2 Fe + 3 CO₂ is 2:3.

How does a mole work?

The unit of measurement used by chemists known as a mole is very significant. Similar to how having a dozen eggs says you have twelve eggs, having a mole of something indicates that you have 602,214,076,000,000,000,000,000 of that particular thing.

                         Chemists must measure very small objects, such as atoms, molecules, or other particles, using moles.

Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading. As a result, scientists devised the moles to bridge the divide among extremely small and extremely huge numbers.  The mole ratio of Fe to CO in the reaction

     Fe₂O₃+ 3 CO  2 Fe + 3 CO₂ is 2:3.

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Answer:

b) Aluminum sphere: 11.4J

Silver sphere: 44.3 J

Explanation:

a) Mass of aluminum sphere

= 2.70(196)

= 529.20g

= 0.5292kg

Mass of silver sphere

= 10.49(196)

= 2056.04g

= 2.05604 kg

b) Work done (Joules)

= force (Newton) ×distance moved in the direction of the force (in meters)

\( \boxed{W = F \times d} \)

To raise the sphere, the work done is against gravity.

For the formula for weight (or force of gravity), the mass needed is in kg, which we have already converted to in part (a).

Since they asked for the work done on each sphere, let's calculate the work done for the aluminium sphere first.

Aluminium sphere:

F= mg

F= 0.5292(9.8)

F= 5.18616N

W= Fd

Work done

= 5.18616(2.2)

= 11.4J (3 s.f.)

Silver sphere:

F= mg

F= 2.05604(9.8)

F= 20.149192N

W= Fd

Work done

= 20.149192(2.2)

= 44.3J (3 s.f.)

We must utilise the Henderson-Hasselbalch equation and caffeine's acid dissociation constant (Ka) to determine the initial molar concentration of a caffeine solution given the pH.

The Henderson-Hasselbalch equation, which reads pH = pKa + log([A]/[HA]), can be used to figure out a buffer's pH. The equilibrium concentrations of the conjugate acid-base pair utilised to make the buffer solution are denoted by [HA] and [A] in this equation.

initial molar concentration of caffeine = [HA] = [A-] x 10^14.59

initial molar concentration of caffeine = ([A-]/10000) x 10^14.59

initial molar concentration of caffeine = 1 x 10^-4 x 10^14.59

initial molar concentration of caffeine = 10^-0.59

initial molar concentration of caffeine = 0.278 M (rounded to three significant figures)

Therefore, the initial molar concentration of the solution of caffeine is 0.278 M.

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Answer:

Mass of nitrogen = 25.222g

Explanation:

We know that the mass of the unknown composition is 58.0g, so the total mass must add up to 58.0g, so let's make the unknown mass of nitrogen = x

24.3g + 3.072g + 5.406g + x = 58.0g

32.778g + x = 58.0g

x = 58.0g - 32.778g = 25.222g

Answer:

a) 600 J

b) 75 W

Explanation:

Force= 400 N, distance = 150 cm = 1.5 m, time= 8s

a) Work is the product of force acting on an object and distance (or displacement). The S.I unit of work is the joules.

Work = force × distance = 400 × 1.5 = 600 J

b) Power is the amount of energy transferred per unit time. It is the ratio of work to time. The S.I unit of power is watt

Power = work/time = 600 / 8 = 75 W

For fermentation process to successfully occur, Oxygen gas (O2) must not enter the carboy, because the pyruvate used in the process, gets completely oxidized when oxygen gas is present.

Fermentation is a metabolic process that always must take place in the absence of oxygen. Many of the beneficial microorganisms, create desired changes in different types of beverages and foods through this process of fermentation. And the resulting products of fermentation reaction thus formed, have better/more favorable flavor and taste, and also more life as they get preserved during the process. In addition to this, these microorganisms also provide several health benefits.

The process of fermentation to occur successfully, does not require oxygen gas as it is an anaerobic process. If by any chance or means, oxygen gas is present, the pyruvate used would be completely oxidized during the reaction forming carbon dioxide and water molecules as the by products, by the action of yeast spiration. Moreover, these yeast species needed in the reaction, produce ethanol only in an anaerobic (oxygen-less) environment by another process called the Pasteur Effect.

There are generally three types of fermentation processes based on the end products obtained using the pyruvate. They are:

Acetic Acid Fermentation, Lactic Acid Fermentation, and Alcoholic Fermentation.

Therefore, Oxygen Gas is the correct answer to this question.

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A single replacement reaction is a type of chemical reaction in which one element replaces another element in a compound, forming a new compound and a different element.

The general equation for a single replacement reaction is:

A + BC → B + AC

Where A is the reactive metal, B is the less reactive metal, and C is the non-metal anion in the compound.

The reactivities of the elements that are involved in the process would determine if the reaction will occur or not.

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the nurse will administer approximately 1 teaspoon (tsp) of the medication.1 teaspoon (tsp) is approximately equal to 5 mL.

To determine the number of teaspoons the nurse should administer, we need to calculate the equivalent volume of 30 mEq of KCL using the provided concentration of 60 mEq/10 mL.

First, we'll find the ratio of milliequivalents (mEq) to milliliters (mL) in the given concentration:

60 mEq / 10 mL = 6 mEq/mL

Next, we can set up a proportion to find the volume (in mL) that corresponds to 30 mEq:

6 mEq/mL = 30 mEq / X mL

To solve for X, we can cross-multiply:

6X = 30 * 1

6X = 30

X = 30 / 6

X = 5 mL

Since the medication cup is marked in teaspoons, we need to convert 5 mL to teaspoons.

1 teaspoon (tsp) is approximately equal to 5 mL.

Therefore, the nurse will administer approximately 1 teaspoon (tsp) of the medication.

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The correct answer is: "e. all of the above." A salt bridge is an essential component of a galvanic cell. It is made up of an aqueous ionic compound that allows the reaction of the galvanic cell to continue.

The salt bridge contains positive ions that are attracted to the cathode and negative ions that are attracted to the anode.

By allowing ions to flow between the two half-cells of the galvanic cell, the salt bridge prevents the buildup of charge that could halt the reaction.

This ensures that the cell can continue to produce electrical energy until the reactants are fully consumed.

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