CCC Energy and Matter Recall that force = mass x acceleration. Explain why the
acceleration of a model rocket increases over time, even if the force from the
burning of the rocket fuel remains constant.

One molecule of sucrose is burned with oxygen to make carbon dioxide and water.

What is sucrose?

The components of the disaccharide sugar sucrose are glucose and fructose. It is produced naturally by plants and is the main component of white sugar. C12H22O11 is the chemical formula for it.

To extract and refine sucrose for human use, either sugarcane or sugar beet are employed. Crushing the cane creates raw sugar, which is subsequently delivered to other sectors to be refined into pure sucrose. Sugar mills are usually located in tropical regions near to sugarcane plantations.

C12H22O11 + 12O2 = 12CO2 + 11H2O

When one molecule of sucrose is burnt, we get 12 carbon dioxide molecules.

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Answer:

Ch4 G +2o2 g co2 G +2h2o g How many moles of methane are required to produce 22 g co2 G after combustion

Explanation:

it's 22 grams..

hope the answer was helpful ....

Answer:

because it is a sign that there are more producers for the consumers.

Explanation:

An ecosystem consist of the abiotic or inorganic components, the animals[consumers], the plants[producers] and the decomposers. An ecosystem simply means the environment of organisms that are living together and the way these organisms interact with another.

The producers that is the plants are the ones manufacturing food by themselves either by photosynthesis or chemosynthesis and the consumers are the ones relying on the producers for food.

The ecosystem is still healthy even when there's still a lot of consumers in it because it shows that there are come producers that is to say the producers are more also. If this is not the case, then the ecosystem will not be healthy as the consumers will eat the producers until the producers will not be enough.

Answer:

I think it would be 0 since cations and anions must always combine in such a way so that their charges cancel.

Answer:

false

Explanation:

This statement is false because plants release waste material, like oxygen, through small holes in the plants leaves.

Answer:

Its A

Explanation:

Just took the test and got a 100%

Hey there!:

Molar mass :

Fe₂O₃ = 159.69 g/mol

O₂ = 31.99 g/mol

By reaction stochiometry  :

4 Fe + 3 O₂ = 2 Fe₂O₃

3 * (31.99 g O₂ )  ------------------  2 * ( 159.69 ) g Fe₂O₃

8.93 g O₂ --------------------------- ( mass O₂)

mass O₂ =  ( 8.93 * 2 * 159.69 ) /  ( 3 * 31.99 )

mass O₂ = 2852.0634 / 95.97

mass O₂ = 29.71 g Of Fe₂O₃

Hope this helps!

Answer:

The correct answer is 7.1 degree C.

Explanation:

Based on the given information, the initial temperature or To of the block is 23.4 degree C.  

The energy lost or Q from the given wooden block is -759 J.  

The specific heat capacity or c of the wood given is 1.716 J/g°C

The mass of the wooden block given is 27.2 grams.  

There is a need to find the final temperature of the wooden block, for this the formula to be used is,  

Q = m × c × (T-To)

Now by putting the given values in the formula we get,  

-759 = 27.2 × 1.716 (T - 23.4)

T = 7.1 degree C.  

Explanation:

SOLID

Sodium hydroxide exists in the solid phase at room temperature. You would find it in the lab as hemispherical white solid pellets. The phase of a substance depends on temperature and pressure. As you heat a solid, it will melt and change to the liquid phase.

Answer:

Hydrogen may be used in fuel cells for local electricity generation or potentially as a transportation fuel. Hydrogen is produced as a by-product of industrial chlorine production by electrolysis.

Answer:

To calculate the mass of A remaining after a certain time, we can use the first-order rate equation:

ln(A₀/A) = -kt

Where:

A₀ is the initial concentration or mass of A,

A is the concentration or mass of A at time t,

k is the rate constant,

t is the time.

We need to convert the time given from minutes to seconds, as the rate constant is given in s^(-1).

Given:

Rate constant (k) = 0.0490 s^(-1)

Initial mass of A (A₀) = 16.71 g

Time (t) = 0.679 min = 0.679 × 60 = 40.74 seconds

Now we can plug in these values into the equation to calculate the mass of A remaining:

ln(A₀/A) = -kt

ln(A₀/A) = -(0.0490 s^(-1)) × (40.74 s)

ln(A₀/A) = -1.99526

Now, we can rearrange the equation to solve for A:

A₀/A = e^(-1.99526)

A = A₀ / e^(-1.99526)

A = 16.71 g / e^(-1.99526)

Using a calculator, we can evaluate the expression:

A ≈ 16.71 g / 7.352

A ≈ 2.274 g

Therefore, the mass of A remaining after 0.679 min is approximately 2.274 grams.

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Answer:

100 g of water dissolves 204 g of sugar. Therefore, 25 g of water would dissolve 204×25÷100 =51g of sugar at 20°C.

Explanation:

Answer: 408g of sugar

Explanation: the amount of water increased by 2

so, multiply: 204 times 2= 408

Answer: She could have put a steel spoon into the vessel. The correct option is A.

Explanation:

When a candle wax is passed through heat, it is capable of melting within 10- 15 minutes of boiling. Therefore it is not capable of looking the same after 30 mins of heating.

When sugar is put into water it dissolves. When heated it has the ability to crystallize out after water is evaporated but doesn't retain its shape.

A piece of chocolate will melt the instance it comes in contact with any form of heat.

A steel spoon is an alloy metal which is not capable of melting by boiling in water for just 30 minutes. A steel is an alloy of Iron and carbon which melts when superheated at the temperature of 1510 degrees.

The best choice for screening a person's genetics for 1,000 or more genes would be: C. Sequencing.

Sequencing techniques, such as next-generation sequencing (NGS), are well-suited for screening a large number of genes efficiently and comprehensively. NGS allows for high-throughput sequencing of DNA, enabling the simultaneous analysis of multiple genes or even the entire genome. It provides detailed information about the sequence of nucleotides in the DNA, allowing for the identification of genetic variations, mutations, or other genomic features.

Microarray analysis (A) is a technique that can analyze gene expression patterns or detect specific genetic variations, but it is limited in the number of genes it can assess simultaneously compared to sequencing.

RELP analysis (B) is a technique used for detecting genetic variations based on restriction enzyme digestion patterns, but it is more suitable for specific target regions rather than screening a large number of genes.

Karyotyping (D) involves the visualization and analysis of chromosomes to detect large-scale chromosomal abnormalities but is not suitable for screening a large number of individual genes.

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Answer:

Organic chemistry

Explanation:

Organic chemistry is part of the chemistry that studies carbon compounds, which also use organic compounds, which have characteristics.

the compounds is insoluble in water is  O PbCl2 .

Not every substance dissolves easily in water.Some ionic substances, including silver chloride (AgCl) and calcium carbonate (CaCO3), are almost insoluble.This is so because there is a stronger attraction between the ions inside the crystal lattice than there is between the water molecules and the ions.

Explanation: A substance is generally considered to be "insoluble" if it does not dissolve into water.Sand, lipids, wood, metals, & plastic are a few examples.They would not dissolve when we attempt to mix them with water.

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K₂CO₃ has three element and name of element is potassium, carbon, oxygen and total number of atom is six and the three atom is of oxygen

K₂CO₃ is an inorganic compound with chemical name potassium carbonate and it is also called carbonate of potash, or dipotassium carbonate or Pearl ash and it is a dipotassium salt of carbonic acid and it is widely used in the production of glass and soap

Here given compound is K₂CO₃ which has three element and name of element is potassium, carbon, oxygen and total number of atom is six means 2 potassium one carbon and three oxygen atom and the three atom is of oxygen and subscript and coefficient means number of element which is present in the compound

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Ksp of PbBr₂ is 6.60 × 10⁻⁶. The molar solubility of PbBr₂ in pure water is 0.0118M.

Ksp or Solubility Product Constant is an equilibrium constant for the dissociation in an aqueous solution.

Molar solubility (S) is the concentration of the dissolved substance in a solution that is saturated.

Let the molar solubility be S upon dissociation.

PbBr₂ or Lead Bromide dissociates in pure water as follows:

                          PbBr₂ ----------> Pb⁺² + Br⁻

                                                     S      2S

Ksp = [Pb⁺²] [ Br⁻]

Ksp = (S) (2S)²

Ksp = 4S³

6.60 × 10⁻⁶ = 4S³

S = 0.0118M

Hence, the Molar solubility S is 0.0118M.

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Answer:

Amigo esta es la solución  dame corona

Explanation:

¿Cómo se obtiene la masa de un elemento químico?

En conjunto, el número de protones y de neutrones determinan el número de masa de un elemento (número de masa = protones + neutrones). Si quieres calcular cuántos neutrones tiene un átomo, solo tienes que restar el número de protones, o número atómico, del número de masa.

Mass of Hydrogen = 3.7 g

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

180.2 g/mol of glucose-C₆H₁₂O₆ contains 72.1 grams of carbon, 96 g/mol of oxygen and the remainder is hydrogen

Remainder Hydrogen :

\(\tt 180-(72.1+96)=11.9~g/mol\)

% mass of Hidrogen in Gllucose :

\(\tt \dfrac{11.9}{180}\times 100\%=6.61\%\)

So mass of Hydrogen in 55.5 g Glucose :

\(\tt 6.61\%\times 55.5~g=3.7~g\)

The correct answer to the question is d - H2O.The molecule among the given choices is H2O, which is represented by option d. A molecule is a group of atoms that are chemically bonded together.

In this case, H2O represents two hydrogen atoms (H) chemically bonded to one oxygen atom (O), forming a water molecule. On the other hand, ca, c, na, and mg represent individual atoms of calcium, carbon, sodium, and magnesium, respectively. While these atoms may chemically bond with other atoms, they do not represent a molecule by themselves. Therefore, the correct answer to the question is d - H2O.

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Answer:

200 moles of nitric acid are produced from 300.00 mol of nitrogen dioxide.

Explanation:

You know that the balanced reaction is:

3 NO₂ + H₂O ⇒ 2 HNO₃ + NO

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

So:

\(x=\frac{c*b}{a}\)

In this case, the rule of three can be applied in the following way: if 3 moles of NO₂ produce 2 moles of HNO₃ by stoichiometry of the reaction, 300 moles of NO₂ how many moles of HNO₃ do they produce?

\(moles of HNO_{3} =\frac{300 moles of NO_{2}*2 moles of HNO_{3}}{3 moles of NO_{2}}\)

moles of HNO₃= 200

200 moles of nitric acid are produced from 300.00 mol of nitrogen dioxide.

Answer:

200.0 mol

Explanation:

im smart :)

The standard reaction entropy for the given chemical reaction is 109 J/K (rounded to zero decimal places).

To calculate the standard reaction entropy of the given chemical reaction, we need to use the standard entropy of formation values of the products and reactants.

The standard entropy of formation values are given in the ALEKS Data tab as follows:

C₃H₈(g) : 186.2 J/K

O₂(g) : 205.0 J/K

CO₂(g) : 213.6 J/K

H₂O(l) : 69.9 J/K

Using these values, we can calculate the change in entropy (ΔS) for the reaction:

ΔS = ΣS(products) - ΣS(reactants)

ΔS = [3(213.6 J/K) + 4(69.9 J/K)] - [1(186.2 J/K) + 5(205.0 J/K)]

ΔS = 108.7 J/K

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The standard reaction entropy for the given chemical reaction is 109 J/K (rounded to zero decimal places).

To calculate the standard reaction entropy of the given chemical reaction, we need to use the standard entropy of formation values of the products and reactants.

The standard entropy of formation values are given in the ALEKS Data tab as follows:

C₃H₈(g) : 186.2 J/K

O₂(g) : 205.0 J/K

CO₂(g) : 213.6 J/K

H₂O(l) : 69.9 J/K

Using these values, we can calculate the change in entropy (ΔS) for the reaction:

ΔS = ΣS(products) - ΣS(reactants)

ΔS = [3(213.6 J/K) + 4(69.9 J/K)] - [1(186.2 J/K) + 5(205.0 J/K)]

ΔS = 108.7 J/K

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Answer:

Volume of gold  is 9.64 L .

Explanation:

Given data:

Mass of gold = 85 g

Temperature  = standard = 273 K

Pressure  = standard = 1 atm

Volume of gold = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will calculate the number of moles of gold.

Number of moles = mass/molar mass

Number of moles = 85 g/ 197 g/mol

Number of moles = 0.43

1 atm × V  = 0.43 mol ×0.0821 atm.L/ mol.K  × 273 K

V = 9.64 atm.L / 1 atm  

V = 9.64 L

The best choice for sterilizing the following items would be:

Autoclaving is the most commonly used method for sterilizing laboratory equipment, as it is effective in killing bacteria, viruses, and spores. However, it is not suitable for heat-sensitive materials, such as antibiotic solutions and plastic-wrapped petri plates.

Filtration is a good choice for sterilizing heat-sensitive liquids, such as antibiotic solutions, while ethylene oxide gas sterilization is a suitable method for sterilizing heat-sensitive materials, such as plastic-wrapped petri plates.

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Answer:

Explanation:

Hi there!

N₂+3H₂⇋2NH₃

The molecular mass of NH₃ is 34

The mass of N₂ is 28 and mass of H₂ is 2.

Then,

2 moles of NH₃ is created by 28 g of N₂

1 moles of NH₃ is created by 28/2 g of N₂  

9.3g  of NH₃ is created by (28/2)*9.3 moles of N₂

Therefore, 130.2 g of N₂ is required to create 9.3 moles of NH₃.

Hope it helps!

N₂+3H₂⇔2NH₃

moles N₂ = 1/2 x 9.3 = 4.65

mass N₂ = 4.65  x 28 g/mol = 130.2 g

The diagram shows the stages jamila uses to make zinc sulfate and the stages in the correct order include the following below:

This is referred to as a process used to separate solids from liquids or gases using a filter medium.

In the formation of zinc sulfate, the zinc is usually added to concentrated H₂SO₄ and filtered with the use of filter paper through several techniques to ensure that the filtrate is dry and concentrated.

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The value of K_eq for this reaction is approximately 1.805 × 10^-5.

To find the value of the equilibrium constant (K_eq) for the given reaction, we can use the equilibrium concentrations of the species involved. The equilibrium constant expression for the reaction is:

K_eq = [CH3COO-][H3O+] / [CH3COOH]

Given the following concentrations at equilibrium:

[CH3COOH] = 2.0 × 10^-1 M

[CH3COO-] = 1.9 × 10^-3 M

[H3O+] = 1.9 × 10^-3 M

Substituting these values into the equilibrium constant expression, we get:

K_eq = (1.9 × 10^-3)(1.9 × 10^-3) / (2.0 × 10^-1)

K_eq = 3.61 × 10^-6 / 2.0 × 10^-1

K_eq = 3.61 × 10^-6 × 5.0 × 10^0

K_eq = 1.805 × 10^-5

Therefore, the value of K_eq for this reaction is approximately 1.805 × 10^-5.

None of the provided answer choices match this value exactly.

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