Assuming the only two forces on the toy rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?
O Lift=5 Newtons / Gravity = 5 Newtons O Lift =3 Newtons / Gravity = 4 Newtons
O Lift = 5 Newtons / Gravity = 4 Newtons O Lift = 4 Newtons / Gravity = 4 Newtons​

Answer:

Please find the answer to the question below

Explanation:

In chemistry, the following mathematical formula is used to calculate the number of moles contained by a substance:

mole = mass of substance (g)/molar mass of substance (g/mol)

Molar mass of salicylic acid (C7H6O3) = 12(7) + 1(6) + 16(3)

= 84 + 6 + 48

= 138g/mol

Mass = 5.50grams

mole = 5.5/138

mole = 0.039

Approximately, the number of moles of 5.5grams of salicylic acid is 0.04moles. This is in accordance with the mole value (0.04) given in this question.

Answer:

The answer is "As \(Q=336\), at high-temperature \(\Delta G_{rxn}>0\) and When\(K>1,\)\(\Delta G^{\circ}_{rxn}>0\)."

Explanation:

The equation for the reaction is:

\(A(g) \leftrightharpoons B(g)\)  

\(K=5.8\\\\Q=336\)

At equilibrium,

\(\Delta G^{\circ}_{rxn}>0\)\(=-RT \ln \ K\)

When k=5.8(>1), the value of \(\ln k\) would be positive

So, \(\Delta G^{\circ}_{rxn}\) is negative (< 0)

So if K > l, \(\Delta G^{\circ}_{rxn}<0\)

If the reaction is not in equilibrium so the equation is :

\(\Delta G_{rxn}>0\)=\(\Delta G^{\circ}_{rxn}\)\(+RT \ln Q\)

Substituting the expression:

\(\Delta G_{rxn}>0\)\(= (-RT \ln K) + RT \ln Q\)

                 \(= RT(\ln Q- \ln K)\\= RT(\ln (336)-\ln (5.8))\\= RT(4.06)\)

It is the positive value for all temperatures.

So, As Q = 336, at the high temperature \(\Delta G_{rxn}>0\).

Atoms of silicon have 0.15 moles.

\(4.0 × 10^2^4\) atoms of silicon.

We have to find the number of moles.

Silicon has the atomic number 14.

One mole of silicon contains \(6.023× 10^2^3\) atoms.

\(6.023× 10^2^3\)number of atoms are present in one mole of silicon.

\(4.0*10^24\)number of atoms will have-

\(6.023*10^2^3/4.0*10^2^4=0.15\) moles.

Thus atoms of silicon have 0.15 moles.

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Answer:

(0,1)

Explanation:

Endpoints (-3, 7) and (3,-5)

The midpoints will be the average of the x and y coordinates:

Midpoint for x = (-3+3)/2 = 0

Midpoint for y = (7-5)/2 = 1

(0,1)

Giving up an electron to another atom can fill the valence of the atom that gave up the electron, because it can achieve a stable electron configuration by having a full outer shell.

When atoms form chemical bonds with each other, they do so in order to achieve a more stable electron configuration. For many atoms, this means having a full outer shell of electrons. When an atom gives up an electron to another atom, it can achieve a stable electron configuration by having a full outer shell.

For example, consider the element sodium, which has one valence electron. Sodium can achieve a more stable electron configuration by giving up this electron to another atom, such as chlorine. Chlorine, on the other hand, has seven valence electrons and can achieve a stable electron configuration by gaining one electron from sodium. Both chlorine and sodium achieve noble configurations.

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Answer: \(C_2H_5\)

Answer:

Nothing. I guess ice vapor is a solid and water vapor is a liquid if nothing isn't an option, but that makes no sense.

Explanation:

Answer:

D. numbers of molecules

Explanation:

Remember that in a balanced equation the mass of the system must remain constant throughout the change due to the Law of Conservation of Mass. It identifies that in a balanced chemical equation matter is neither created nor destroyed, only conserved. So in a balanced equation, the number of molecules is equal on both sides (Reactant side and Product side).

Answer:

When mensuration volume of air within the flask at the primary temperature, a volume of 250mil was recorded, referred to as V1. The temperature of the air within the flask in boiling water was recorded as 99ᵒC, referred to as T2. so as to seek out the right calculations, 99ᵒC must be born-again to Kelvin by adding 273.

the primary temperature in Kelvin is 372K. the worth of V1/T1, may be found by swing 250/372. This involves a complete of zero.67. the quantity of the air within the flask of the second temperature was 177 mil, referred to as V2.

The temperature of the air within the cooled flask is 7ᵒC, referred to as T2. 7ᵒC must be born-again to Kelvin by adding 273 that involves a final total of 280K. the worth of V2/T2, found by swing 177/280 involves a complete of zero.63.

The close to equality in numbers may be attributed to Charles Law. Charles Law states that “as the temperature will increase, thus will the quantity of a gas sample once the pressure is command constant”.

The results of V1/T1 and V2/T2 were terribly on the brink of one another. this can be because of the very fact that this experiment was worn out as a closed system. In Charles Law, if there's a closed system the 2 ratios ought to have equal numbers. {this is|this is often|this may be} why it can be expected for the magnitude relation numbers to be terribly equal.

Answer:

The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.

Explanation:

i know

Answer:

D) The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.

Explanation:

I took the test and got it right.

\(3.4 \times {10}^{ - 12} \)

Multiply first and then divide

Answer:

Overexploitation: Human activity and development in the tropical rainforest has lead to massive amounts of forest land being converted into other human uses such as mining or agriculture. Overexploitation of the rain forests Natural resource is a highly damaging impact that humans have on the rainforest, massive amounts of trees are cut down in the rainforest which are used for the timber industry, this cutting down of the trees causes a massive drop in the habitat of the forest’s organisms and the machinery  used to complete this process provide a massive source of pollution and habitat destruction. Approximately 80% of the rainforests nutrients comes from trees and plants. That leaves 20% of the nutrients in the soil. when trees are over exploited conditions change very quickly, the soil dries up and causes erosion. Poaching and hunting are a major issue in the tropical rainforest, exotic creatures are being over hunted causing their populations to go into the danger zones and on the verge of extinction. Furthermore, the rainforest is being used up at an exeptional rate for mining purposes: oil, gold and iron ore are being mined at a massive rate.

Explanation:

Each 1.0 L balloon requires 1/18.8 = 0.053 moles of helium gas. You can fill approximately 13 1.0 L balloons with the helium gas in the cylinder.

Now, we can use the ideal gas law again to find the final volume of each balloon when the pressure is reduced to 1.0 atm:

PV = nRT

V2 = nRT/P2

V2 = (0.716 moles x 0.082 L atm/mol K x 298 K)/1.0 atm

V2 = 18.8 L/mol

The total number of 1.0 L balloons that can be filled with the 6.0 L cylinder of helium gas is:

n_total = n_initial/n_balloon

n_total = 0.716 moles/0.053 moles per balloon

n_total = 13.5 balloons

The ideal gas law is a fundamental equation in thermodynamics that relates the pressure, volume, temperature, and amount of gas in a closed system. It is expressed mathematically as PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

This law is based on the assumption that gases are composed of small particles that move randomly and collide with each other and the walls of the container they are in. The ideal gas law is a useful tool for predicting the behavior of gases under different conditions, such as changes in temperature and pressure. Real gases deviate from ideal behavior at high pressures and low temperatures, and more complex equations must be used to describe their behavior accurately.

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It is not possible to solve the given system of differential equations. The system needs to be solved using numerical methods.

A nonlinear irreversible chemical process is described by the following governing equations 2.1 and 2.2. CA is the concentration of the chemical product that depends on temperature. The temperature, T, is not constant and the rate of reaction is a function of temperature. The governing equations are given below:

Equation:

2.1: dCA/dt= -k(T)CA

Equation :

2.2: dT/dt= -q(T)CA

The given differential equations form a system of two ordinary differential equations with two dependent variables CA and T. The values of k(T) and q(T) depend on temperature T and are the coefficients of the governing equations.The given differential equations are nonlinear differential equations since CA and T appear in the coefficients of the differential equations.

These equations are also irreversible as the rate of change of the product CA depends only on the concentration of the reactants and not on the concentration of the product (CA). The initial conditions are not given in the question. Hence, it is not possible to solve the given system of differential equations. The system needs to be solved using numerical methods.

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The specific rotation of the compound is -1022.5 degrees/(g·cm).

The specific rotation of a compound is a measure of its ability to rotate plane-polarized light. It is denoted by the symbol [α] and is expressed in degrees per unit concentration and unit path length. To calculate the specific rotation of the compound in this scenario, we need to use the formula:

[α] = observed rotation / (concentration (g/mL) × path length (dm))

In this case, the observed rotation is -4.09 degrees, the concentration is 10 g/500 mL (0.02 g/mL), and the path length is 20 cm (0.2 dm). Plugging these values into the formula:

[α] = -4.09 / (0.02 × 0.2) = -4.09 / 0.004 = -1022.5 degrees/(g·cm)

Therefore, the specific rotation of the compound is -1022.5 degrees/(g·cm).

It's important to note that specific rotation values are typically reported with the sign indicating the direction of rotation (clockwise or counterclockwise) and the units specified. In this case, the negative sign indicates that the compound rotates plane-polarized light in the counterclockwise direction.

It's also worth mentioning that the specific rotation is a characteristic property of a compound and can be used to identify and distinguish different enantiomers or optically active substances.

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Answer:

the atomic radius is larger as you go down the noble gas family

Answer:

1. Phosphorylation by a kinase - decrease

2. Dephosphorylation by a phosphatase - increase

3. Binding of allosteric activator - increase

4. Binding of allosteric inhibitor - decrease

5. Transcriptional upregulation - increase

6. Transcriptional downregulation - decrease

Example 1: The presence of glucose-6-phosphate. This example is associated with an increase in glycogen synthase activity.

Glycogen synthase requires glucose-6-phosphate (G6P) as a substrate in order to catalyze the synthesis of glycogen.

Therefore, the presence of G6P will increase the activity of glycogen synthase, leading to an increase in glycogen synthesis.

Furthermore, G6P is the product of the enzyme glucokinase, which catalyzes the phosphorylation of glucose, so the presence of G6P indicates that glucose is present, and therefore glycogen synthesis can occur.

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Answer:

Some lizards in the eastern U.S. have adapted to invasive fire ants -- which can bite, sting, and kill lizards -- reversing geographical trends in behavioral and physical traits used to avoid predators. A new study describing this reversal appears online on November 29, 2018, in the journal Global Change Biology and reveals that new environmental challenges can override the historical influences that originally determined geographical trends in traits.

"Rapid environmental change, be it from changing climate or the introduction of invasive species, is putting a lot of pressure on native species," said Christopher Thawley, graduate student at Penn State at the time of the study and first author of the paper. "Usually when researchers look at how native species might respond to these kinds of threats, they might measure one characteristic of the animal and at one or a few sites. In this study, we looked at three separate characteristics of eastern fence lizards from thirteen sites spanning a thousand miles and found that these lizards are capable of adapting in a concerted way to meet the threat of invasive fire ants, and in a relatively short time frame."

Explanation:

The total charge on an atom comes from protons and electrons.

The proton is positively charged while the electron is negatively charged. A neutral atom would have an equal number of protons and electrons.

An atom with more protons than electrons will be positively charged while those with more electrons than protons will be negatively charged.

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Answer:

n₂ =  6.8 mol

Explanation:

Given data:

Initial number of moles = 3.4 mol

Initial volume = 25 L

Number of moles = ?

Final volume = 50 L

Solution:

According to Avogadro law,

V₁/n₁  = V₂/n₂

Now we will put the values in formula.

25 L/3.4 mol = 50 L/ n₂

n₂ = 50 L× 3.4 mol/25 L

n₂ = 170 L.mol/25 L

n₂ =  6.8 mol

Water has a higher boiling point than ethanol because of stronger intermolecular forces. The correct option is b.

The boiling point of water is 100°C, while the boiling point of ethanol is 78.5°C. Intermolecular forces are the attractive forces that occur between molecules. The higher the intermolecular forces, the higher will be the boiling point of the substance.

              This is because a higher amount of heat energy is required to overcome the intermolecular forces and convert the substance from a liquid state to a gaseous state. Water molecules are polar in nature and are strongly attracted to one another by hydrogen bonding.

                Hydrogen bonds occur between a slightly positive hydrogen atom and a slightly negative oxygen atom in neighboring molecules. Ethanol molecules are also polar and have hydrogen bonding but these interactions are not as strong as in water molecules. The polar nature of the water molecule makes it difficult to break the intermolecular hydrogen bonds and hence a higher boiling point.

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\(\qquad\)\( \pink{\bf\longrightarrow { Molar \:mass \:of \:H₂O:-} }\)

\(\qquad\)\( \sf \longrightarrow 1\times +16\)

\(\qquad\)\( \sf \longrightarrow 18g\)

\(\qquad\)____________________

Let's calculate the number of moles present in 89g of H₂O.

\(\qquad\)\( \purple{\bf\longrightarrow { No \:of \:moles = \dfrac{Given \:mass}{Molar\: mass}}}\)

\(\qquad\)\( \sf \longrightarrow \dfrac{89}{18}\)

\(\qquad\)\( \sf \longrightarrow 4.94\: moles\)

We know –

Number of molecules:-

\(\qquad\)\( \purple{\bf \longrightarrow No \: of \: moles \times Avogadro \: number}\)

\(\qquad\)\( \sf \longrightarrow 4.94×6.022×10²³\)

\(\qquad\)\( \sf \longrightarrow 2.98 ×10²⁴\)

\(\qquad\)\(\purple{ \bf \longrightarrow 2.98×10²⁴ molecules}\)

\(\qquad\)____________________

First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:

Let x be the mole fraction of Neon.

Therefore, (1 - x) is the mole fraction of Xenon

.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -

x = 0 + x

x = 0.279

Mole fraction of Neon = 0.279

Mole fraction of Xenon = 0.721

Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)

Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))

Number of moles of Xenon = 8.44 moles

Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))

Number of moles of Neon = 3.29 moles

Now, we can calculate the partial pressure of Xenon and Neon.

Partial pressure of Xenon:

Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure

Partial Pressure of Xenon = 0.721 * 7.10 atm

Partial Pressure of Xenon = 5.12 atm

Partial pressure of Neon

Partial Pressure of Neon = Mole fraction of Neon * Total Pressure

Partial Pressure of Neon = 0.279 * 7.10 atm

Partial Pressure of Neon = 1.98 atm

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Answer: A balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Explanation:

A balanced chemical equation is defined as the equation which contains same number of atoms on both reactant and product side.

Hence, balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is as follows.

\(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\)

Here, number of atoms present on reactant side are as follows.

Number of atoms present on product side are as follows.

Since, there are same number of atoms present  on both reactant and product side. Therefore, this equation is balanced.

Thus, we can conclude that balanced equation for the  equilibrium reaction where the aqueous bicarbonate ion, \(HCO^{-}_{3}(aq)\); decomposes to  form hydrogen ions, \(H^{+}(aq)\) and carbonate ions, \(CO^{2-}_{3}\) is \(HCO^{-}_{3} \rightleftharpoons H^{+}(aq) + CO^{2-}_{3}\).

Answer:

Unidentified flying object or fly saucer.

Explanation:

Answer:

It is a silver dish that has round windows around it with little circluar lights round it too.

Answer: 1) True

2) False 4)False 5)True

Explanation: I took a test that had similar questions