Marcos thought that energy drinks would increase students' productivty. Before he set his
hypothesis, he read newspaper and magazine articles on the effects of energy drinks, he
also conducted a few searches on the internet. What part of the scientific method did
Marcos just complete?

The balanced chemical equation is CaS + AlC → A + CaC

To balance the chemical equation CaS + AlC → A + CaC, we need to ensure that the same number of atoms of each element is present on both sides of the equation. Here's the step-by-step process to balance the equation:

Begin by counting the number of atoms of each element on both sides of the equation.

Left side (reactants):

Calcium (Ca): 1

Sulfur (S): 1

Aluminum (Al): 1

Carbon (C): 1

Right side (products):

A: 1

Calcium (Ca): 1

Carbon (C): 1

Sulfur (S): 0

Start by balancing the elements that appear in the fewest compounds. In this case, we can balance sulfur (S) first. Since there is only one sulfur atom on the left side and none on the right side, we need to add a coefficient of 1 in front of A on the right side to balance the sulfur.

CaS + AlC → 1A + CaC

Next, balance calcium (Ca) by adding a coefficient of 1 in front of CaS on the left side.

1CaS + AlC → 1A + CaC

Now, balance aluminum (Al) by adding a coefficient of 1 in front of AlC on the left side.

1CaS + 1AlC → 1A + CaC

Finally, balance carbon (C) by adding a coefficient of 1 in front of CaC on the right side.

1CaS + 1AlC → 1A + 1CaC

The balanced chemical equation is:

CaS + AlC → A + CaC

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Based on the information provided, the shared derived characteristic that frogs and pigeons have is "Jaws."

Frogs and pigeons both belong to the vertebrate group and possess jaws. Jaws are bony structures that are essential for feeding and play a crucial role in the process of digestion. Frogs have well-developed jaws that allow them to catch and consume prey, while pigeons have a beak that serves as their modified jaw structure.

The branching tree diagram indicates that frogs and pigeons branch off at different points, suggesting that they have evolved independently from a common ancestor.

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Answer:

PAPA (atm)(atm) PBPB (atm)(atm)

4.0 2.0

2.0 1.4

1.0 1.0

0.50 0.71

0.25 0.50

NaHCO3 is soluble in water.  NaHCO3 is ionic polar compound. water is polar quantities so, polar disolve in polar.

The basic concept of solubility is that like dissolves like. It means that polar substances are soluble in polar solvents and non-polar substances are soluble in non-polar solvents.

Solubility is described as the most amount of a substance so that it will dissolve in a given amount of solvent at a exact temperature. Solubility is a function property of a particular solute–solvent aggregate, and unique substances have substantially differing solubilities.

Solubility is the ability of a substance (solute) to form a solution with another substance (solvent). Insolubility is the opposite property, the inability of a solute to form such a solution.

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Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

Answer:

Molecule

Explanation:

N=N

the answer is liquid

Explanation:

Coz liquid is better than anyone else about the league Now guys are u doing anything for the link to know

Answer:

Did this for an assignment, reword and shorten it yourself, also give brainliest

Explanation:

The idea of Olive Oil coffee from a chemistry perspective brings several factors into consideration, such as polarity, solubility, density, melting points, boiling points, and types of mixtures.

Firstly, olive oil is a nonpolar substance, while coffee is primarily composed of polar compounds, such as caffeine and various acids. Polarity refers to the distribution of charge within a molecule, and polar and nonpolar substances do not readily mix. This fundamental difference in polarity makes it challenging to create a stable and homogeneous mixture between olive oil and coffee.

Secondly, solubility plays a crucial role. Coffee is soluble in water due to its polar components, allowing the extraction of flavor compounds when brewed. However, olive oil is not soluble in water, so attempting to mix it with coffee would result in phase separation, with the oil floating on top or forming droplets dispersed throughout the coffee. This lack of solubility further contributes to an unstable and unappealing mixture.

Density is another relevant factor. Olive oil is less dense than water, which means it would naturally rise to the top when mixed with coffee. This separation of phases would lead to an unpleasant texture and appearance in the cup.

Additionally, the melting points and boiling points of olive oil and coffee differ significantly. Olive oil has a higher melting point and boiling point compared to the volatile compounds found in coffee. When attempting to mix hot coffee with olive oil, the heat could cause the oil to evaporate or decompose, altering its flavor and aroma.

Moreover, considering the types of mixtures, the combination of olive oil and coffee would likely result in an unstable heterogeneous mixture rather than a homogeneous one. Homogeneous mixtures are uniform throughout, while heterogeneous mixtures have distinct phases. The immiscibility of oil and water would make it challenging to achieve a stable and well-blended mixture.

To stabilize such a mixture, emulsifiers or surfactants could be employed to promote the dispersion of oil in water. However, finding an appropriate emulsifier that can effectively bind polar and nonpolar components in coffee without compromising its taste and texture would be a difficult task.

In conclusion, the idea of Olive Oil coffee from a chemistry standpoint faces challenges related to the differences in polarity, solubility, density, melting points, boiling points, and the types of mixtures involved. These factors make it highly unlikely to achieve a stable and appealing combination.

Answer:

chemical reaction

Explanation:

The chemical reaction produces chemical changes to provide energy. Chemical reactions often involve changes in energy due to the breaking and formation of bonds.

The birth weight of cats at the 90th percentile would be approximately 3.7 ounces. b. The birth weight of cats at the 10th percentile would be approximately 2.3 ounces.

There are three main methods of calculating weight:

1. Balance Beam Scale: A balance beam scale is an example of a mechanical weighing system. It uses a set of calibrated weights to measure the weight of an object.

2. Digital Scale: A digital scale uses an electronic or digital readout to display the weight of an object.

3. Calipers: Calipers are devices used to measure the distance between two points, such as thickness or diameter. They come in various sizes and shapes, depending on the type of measurement the user wants to take.

Birth weight is the weight of a baby at the time of birth. It is usually measured soon after delivery, with a special baby scale, though sometimes the baby's weight is estimated. The normal range of birth weight is anywhere between 5 lbs 8 oz and 10 lbs, though preterm or premature babies may be significantly lighter. A baby's birth weight is important because it can provide a clue to the baby's overall health. High birth weights may indicate an underlying medical condition, and low birth weights can be a sign of premature or difficult delivery and health risks associated with such a delivery.

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Answer:

640 g

Explanation:

Step 1: Given and required data

Step 2: Calculate the moles of oxygen gas

We will use the ideal gas equation

P × V = n × R × T

n = P × V / R × T

n = 25 atm × 20 L / (0.082 atm.L/mol.K) × 300 K = 20 mol

Step 3: Calculate the mass corresponding to 20 moles of oxygen

The molar mass of oxygen is 32.00 g/mol.

20 mol × 32.00 g/mol = 640 g

Answer:

Carbon has 4 valence electrons and Chlorine has 7 valence electrons. The bonding between the atoms is due to electronegativity difference. The electronegativity of carbon is 2.5 compared to chlorine which is 3.1, so they will bond by sharing the electron pair (valance electron) from each atom in a covalent bond. In addition, Carbon is more electronegative than Chlorine, which means that it takes less energy to remove an electron from Carbon than from Chlorine. This makes it easier for the electrons to be shared between them (since there is less energy required to share an electron).

Explanation:

Answer: The number of electrons in given amount of silver are \(1.839\times 10^{24}\)

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

......(1)

We are given:

Mass of silver = 7.0 g

Molar mass of silver = 107.87 g/mol

Putting values in equation 1:

\(\text{Moles of silver}=\frac{7.0g}{107.87g/mol}=0.0650 mol\)

According to the mole concept:

1 mole of a compound contains \(6.022\times 10^{23}\) number of particles.

Number of electrons per atom of silver = 47

So, 0.065 moles of silver will contain = \((0.065\times 6.022\times 10^{23}\times 47)=1.839\times 10^{24}\) number of electrons

Hence, the number of electrons in given amount of silver are \(1.839\times 10^{24}\)

Answer:

81 gm

Explanation:

The mass of 1 mole is 27 g

So, Mass of 3 moles of Aluminium would be 3 × 27 = 81 gm..Thus mass of 3 Moles of Aluminium is 81 gm.

The median of the following set of data (39.8, 39.6, 39.2, 39.6 and 39.5) is 39.6.

Median is a number separating the higher half from the lower half of a data sample, population, or probability distribution.

The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one (e.g., the median of {3, 3, 5, 9, 11} is 5.

The following set of data was given this question;

39.8, 39.6, 39.2, 39.6 and 39.5

We arrange these data as follows:

39.2, 39.5, 39.6, 39.6, 39.8

The middle number or median is 39.6

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Answer: Pick up litter and throw it away in a garbage can.

Blow or sweep fertilizer back onto the grass if it gets onto paved areas. ...

Mulch or compost grass or yard waste. ...

Wash your car or outdoor equipment where it can flow to a gravel or grassed area instead of a street.

Don't pour your motor oil down the storm drain.

HOPE THIS HELPS

The standard cell potential (also known as the standard electrode potential) is a measure of the potential difference between two electrodes in an electrochemical cell under standard state conditions.

(a) Standard Cell Potential for Mg(s) + Ni2+(aq)⟶ Mg2+(aq) + Ni(s):

E0cell = (0.79 - (-0.25))V = 1.04 V.

This reaction is spontaneous under standard state conditions.

(b) Standard Cell Potential for 2Ag+(aq) + Cu(s)⟶ Cu2+(aq) + 2Ag(s):

E0cell = (0.34 - (-0.52))V = 0.86 V.

This reaction is spontaneous under standard state conditions.

(c) Standard Cell Potential for Mn(s) + Sn(NO3)2(aq)⟶ Mn(NO3)2(aq) + Sn(s):

E0cell = (0.15 - (-0.14))V = 0.29 V.

This reaction is spontaneous under standard state conditions.

(d) Standard Cell Potential for 3Fe(NO3)2(aq) + Au(NO3)3(aq)⟶ 3Fe(NO3)3(aq) + Au(s):

E0cell = (1.23 - (-1.50))V = 2.73 V.

This reaction is spontaneous under standard state conditions.

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The original pressure of argon in the cylinder is 5.68 atm.

The original pressure of argon in the cylinder is calculated as follows.

Apply the concept of molar ratio or molar proportion to determine the original pressure of argon in the cylinder.

Pr = [(Pn x Vn) + (Pa x Va) ] / (Vn + Va)

where;

7.15 = [(11.08 x 4.5) + (12 x Pa)] / (4.5 + 12)

7.15(4.5 + 12) = 49.86 + 12Pa

117.98 = 49.86 + 12Pa

68.12 = 12Pa

Pa = 68.12/12

Pa = 5.68 atm

Thus, the original pressure of argon in the cylinder is determined by applying concept of molar ratio.

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Within 5 years the kinetic energy needed for the phase change of methane is increased by some factors. Hence, the arrow for change in kinetic energy for the phase change can be used here.

The phase change of a substance is the change from one state or phase to the other such as from solid to liquid, liquid to vapor etc. The minimum energy needed to overcome the barrier potential for a physical and chemical change is called its activation energy or activation potential.

A substance need kinetic energy to move apart its molecules which are strongly connected in liquid phase to convert it into vapor phase. If the activation potential increases, the substance need more kinetic energy.

Here, if the kinetic energy needed for the phase change of liquid methane increases. That is the reason why liquid methane in Titan not evaporated for some years.

Here the actual change in kinetic energy is increasing, thus, the methane gas is needed to gain more energy to evaporate. Hence, you have to add the first arrows given in the data.

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Answer:

True if by rifting you mean continental rift. If not idk.

Answer:

iron and chlorine

Explanation:

The partial pressure of hydrogen gas in the collected gas is 746 torr.

To determine the partial pressure of hydrogen gas in the collected gas, we need to consider the difference between the total pressure of the collected gas and the vapor pressure of water at the given temperature. The partial pressure of hydrogen gas is the pressure exerted by hydrogen alone.

Given information:

Total pressure of the collected gas (Ptotal) = 767 torr

Vapor pressure of water (Pwater) = 21.0 torr

The partial pressure of hydrogen gas (Phydrogen) can be calculated using Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each individual gas.

Phydrogen = Ptotal - Pwater

Plugging in the given values:

Phydrogen = 767 torr - 21.0 torr

Phydrogen = 746 torr

Therefore, the partial pressure of hydrogen gas in the collected gas is 746 torr.

It's important to note that in this calculation, we assume that the water vapor does not react with or dissolve in the hydrogen gas and that the gases behave ideally. Additionally, it's assumed that the collected gas is dry, meaning all the water vapor has been removed or does not significantly contribute to the total pressure.

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The mass of hexane, C₆H₁₄ that would be needed to produce 562 grams of carbon dioxide, CO2 is 183 g

We'll begin by writing the balanced equation for the reaction.

2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

From the balanced equation above,

528 g CO₂ were produced from 172 g of C₆H₁₄

With the above information, we shall determine the mass of hexane, C₆H₁₄ needed to produce 562 g CO₂. Details below:

From the balanced equation above,

528 g CO₂ were produced from 172 g of C₆H₁₄

Therefore,

562 g of CO₂ will react to produce = (562 × 172) / 528 = 183 g of C₆H₁₄

Thus, the mass of hexane, C₆H₁₄ needed is 183 g

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The sequences were already outlined therefore she didn't have any difficulty in choosing between math and poetry.

A sequence is an orderly arrangement of events or objects. When objects or events are arranged in a sequence, decision making becomes much easier.

For the task at hand, since the sequences were already outlined, then she didn't have any difficulty in choosing between math and poetry.

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Answer:

to solve an equation

Answer:

THE FINAL PRESSURE OF AMMONIA IF THERE IS NO CHANGE IN TEMPERATURE AND A DECREASE IN VOLUME FROM 90.3 mL TO 43.4 mL IS 2.91 atm.

Explanation:

At constant temperature, the pressure of a given mass of gas is inversely proportional to the volume. This question follows Boyle's law of gas laws.

Mathematically written as:

P1V1 = P2V2

Re-arranging the formula by making P2 the subject of the formula;

P2 = P1V1 / T2

P1 = 1.4 atm

V1 = 90.3 mL

V2 = 43.4 mL

P2 = unknown

So therefore, we have:

P2 = 1.4 * 90.3 / 43.4

P2 = 2.91 atm

The final pressure of ammonia is therefore 2.91 atm.

Answer:

2.37 atm

Explanation:

Step 1: Given data

Step 2: Calculate the final pressure of ammonia

Since the temperature is kept constant, we can calculate the final pressure of ammonia using Boyle's law.

\(P_1 \times V_1 = P_2 \times V_2\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{1.14atm \times 90.3mL}{43.4mL} = 2.37 atm\)

Electrons are transferred from atoms of sodium to atoms of phosphorous The sodium atom looses electron and the phosphorus atoms gains electrons.

The electron is a subatomic particle with an elementary electric charge of -1. Electrons are the first generation of the lepton particle family and are widely regarded as elementary particles due to the lack of known components or substructure.

This transfer causes the sodium atoms  to acquire positive charge and phosphorous to acquire negative charge .

Thus, the sodium and phosphorus atoms strongly attract with each other.

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Your question is incomplete, most probably, your question was

Complete the paragraph about the formation of sodium phosphide.

Electrons are transferred from atoms of

and the phosphorus atoms

to atoms of

C. This transfer makes the sodium atoms

As a result, the sodium and phosphorus atoms strongly

each other.

The amide group  is the name  given to the –NR2 group.

Amides are organic molecules with the amide functional group.

Amides can be primary, secondary, or tertiary. We call secondary and tertiary amides N-substituted amides.

Amides are named using the suffix -amide. Amides are formed in the reaction between an acyl chloride and either ammonia or a primary amine.

Amides react with aqueous acid to form a carboxylic acid and ammonium salt, and with aqueous alkali to form a carboxylate salt and ammonia.

Thus ,the amide group  is the name  given to the –NR2 group.

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The 1930s saw natural disasters as well as manmade ones: For most of the decade, people in the Plains states suffered through the worst drought in American history, as well as hundreds of severe dust storms, or "black blizzards," that carried away the soil and made it all but impossible to plant crops.

Barnacles are sessile/non-moving arthropods that attach to boats/whales. Sessile means they don't move and are fixed to a place.

A barnacle is an arthropod that belongs to the subclass Cirripedia of the subphylum Crustacea and is thus connected to crabs and lobsters. Barnacles are only found in the sea and prefer shallow and tidal seas, usually in erosive environments.

They play a vital part in the food chain since they are filtering organisms. Barnacles are suspension feeders, devouring plankton and dissolved debris floating in seawater, and hence play an important role in water purification for other creatures.

Barnacles produce thick calcium plates that surround them entirely. A white cone comprised of six calcium plates surrounds the crustacean.  Four more slabs form a "door" that the barnacle may open and close according on the tide. When the tide goes out, the barnacle goes into hibernation to retain moisture.

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The relative atomic masses of the given elements are as follows:

Relative atomic mass is the sum of the product of the isotopic masses and the relative abundance of the isotopes of an element.

Relative atomic masses are averages.

The relative atomic masses of the given elements are calculated as follows:

1. Lead:

Relative atomic mass = (203.973 * 0.014) + (205.974 * 0.236) + (206.759 * 0.226) + (207.9766 * 0.523)

Relative atomic mass = 206.96 amu

2. Magnesium:

Relative atomic mass = (23.985 * 79.99) + (24.986 * 10%) + (25.983 * 11.01%)

Relative atomic mass = 24.62 amu

3. Silicon:

Relative atomic mass = (27.977 * 92.21%) + (28.976 * 4.70%) + (29.973 * 3.09%)

Relative atomic mass = 28.08 amu

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Answer:

Explanation:

Para mejor entendimiento, reeescribiremos la ley que pusiste:

S = 64t - 8t²    (1)

De acuerdo al enunciado del problema, S tiene unidades de pie y t en segundos, por lo tanto, S, que se refiere a la posición o altura alcanza de la piedra, puede ser determinado usando esa expresión a tiempos específicos.

Para el calculo de velocidad usamos la siguiente expresión:

V = -g * t     (2)      g: 32.16 ft/s

Tomando en cuenta estas expresiones, veamos los valores de posición y velocidad:

a) Para t = 2 s

S = 64(2) - 8(2)²

S = 96 ft

V = -32.16 * 2

V = -64.32 ft/s

Para t = 3 s

S = 64(3) - 8(3)²

S = 120 ft

V = -32.16 * 3

V = -96.48 ft/s

b) Para saber la altura que alcanzará, usamos la expresión de altura máxima que es la siguiente:

Smáx = -V₀² / 2g   (3)

Para el valor de la velocidad inicial, podemos asumir el valor de la velocidad dada por la formula de la ley S, que es 64. Esto porque al ser multiplicado por el valor del tiempo, queda en unidades de distancia, asi que este valor debe tener unidades de velocidad. Reemplazando este valor en la expresión:

Smáx = -(64)² / 2 * 32.16

Smáx = 63.68 ft

c) Para esta parte, usamos nuevamente la formula de la ley S, usando t = 4 s y listo:

S = 64(4) - 8(16)

S = 128 ft

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