Based on the Law of Conservation of Matter, why do you think the weight of Steel Wool would change the way it did?

Explanation:

99 is not a prime number because it can be multiplied by itself and by other numbers

99*1

9*11

Answer:

A prime number is a number that can only be divisible by ±itself and ±1

but 99 can  be divisible by  ±3; ±11 => 99 isnt a prime number

Explanation:

Answer:

if ur here for the coffee one its between cola and acid rain

Explanation:

ur mom

I believe the answer would be titanium. Good luck on your assignment and have a happy christmas :)

A mass of  28.3 g of butane is needed to produce 46.0 g of carbon dioxide.

Mass of butane (g) = Mass of carbon dioxide (g) / Molecular mass of carbon dioxide (g/mol)  x  Molecular mass of butane (g/mol)

Mass of butane (g) = 46.0 g / 44.01 g/mol x 58.12 g/mol = 28.3 g

Therefore, 28.3 g of butane is needed to produce 46.0 g of carbon dioxide.

Butane has a molecular formula of C4H10 and is a hydrocarbon. Carbon dioxide has a molecular formula of CO2 and is composed of carbon and oxygen atoms.

When butane undergoes combustion, it reacts with oxygen from the atmosphere and forms carbon dioxide.

The reaction between the two molecules produces heat energy, which is why we measure the mass of butane needed to produce the desired amount of carbon dioxide.

This reaction can be represented by the following chemical equation:

 C4H10 + 6O2 → 4CO2 + 5H2O + energy

Thus, the reaction between butane and oxygen produces carbon dioxide, water, and energy. This is why 28.3 g of butane is needed to produce 46.0 g of carbon dioxide.

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Explanation:

1 mol of Ba(OH)2 = 2 moles of HCl

The term for the substance formed during a chemical reaction is product.

Product is the name for the substance that results from a chemical reaction. A chemical reaction is a process that converts one material into another. As a result, during a chemical reaction, new compounds known as products are created.

The species that result from chemical reactions are called products. Reactants undergo a high energy transition state before becoming products in a chemical reaction. The reactants are consumed as a result of this reaction.

For example

CH₄ +2O₂⇒CO₂ +H₂O

Oxygen and methane are reactants while water and Carbon dioxide is the products.

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Answer:

H₂O₂ is a covalent compound

Answer:

Is H₂O₂

Explanation:

So That Answer

Answer:

I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.

4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:

Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)

Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).

5. The balanced equation for the neutralization reaction between NaOH and HCl is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

(aq) represents an aqueous solution, and (l) represents a liquid.

6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:

Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)

Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.

6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:

pH = -log10[H+]

Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.

To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.

6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.

6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.

7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.

Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.

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Answer:

806 grams MgSO4 (epsom salt)

Explanation:

Determine the chemical composition of epsom salt.  It is magnesium sulfate:  MgSO4.  Determine the molar mass of epsom salt by adding the individual atomic masses of each element in the salt:

1 Mg = 24.3 AMU

1 S =    32 AMU

4 O = 64 AMU

Total = 120.36 AMU

This is also the number for molar mass, just expressed as grams/mole instead of AMU.   The molar mass of MgSO4 is 120.36 grams/mole.

If we want 6.70 moles, we can multiply the molar mass by 6.70 moles:

 (6.70 moles)*(120.4 grams/mole) = 806 grams MgSO4 (epsom salt)

The correct statement is option c. At a pH equal to its pI, a polypeptide carries no charged groups. The pI (isoelectric point) of a polypeptide is the pH at which it carries no net charge.

It is the pH at which the positive and negative charges on the amino acids in the polypeptide balance each other out, resulting in a neutral overall charge. At the pI, the polypeptide does not carry any charged groups because the positive and negative charges cancel each other.

The other statements are correct: a weak acid with a pKa of 4.0 will be a more effective buffer at pH 3.8 than at pH 5.7 (statement b), strong acids and bases undergo complete dissociation in water (statement d), and the pKa of an ionizable group can be influenced by the surrounding environment (statement e).

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Explanation:

Silver nitrate + iron (III) chloride  --> silver chloride + iron (III) nitrate

The balanced chemical equation is given as;

2FeCl3 + 3Pb(NO3)2 → 2Fe(NO3)3 + 3PbCl2  

Mass of Pb(NO3)2  = 25g

How many grams of iron (III) nitrate were formed?

From the equation;

3 mol of Pb(NO3)2 produces 2 mol of Fe(NO3)3

Converting to mass using;

Mass = Number of moles * Molar mass

Pb(NO3)2;

Mass = 3 mol * 331.2 g/mol

Mass = 993.6 g

Fe(NO3)3;

Mass = 2 mol * 241.86 g/mol

Mass = 483.72 g

This means 993.6 g produces 483.72 g

We have;

993.6 g  = 483.72 g

25 g = x

solving for x;

x = 25 * 483.72  / 993.6

x = 12.1709 g of iron (III) nitrate

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the beaker that contained some water before NaOH were added means that the resulting solution in that beaker will be more dilute. When this diluted sodium hydroxide solution is added to HCl (not hci), the reaction below occurs

HCl + NaOH ⇒ NaCl + H₂O

The reaction above is a neutralization reaction. The concentration of the acid (HCl) will reduce when a base (sodium hydroxide) is added and will also reduce more because of the presence of more water (in the base) which normally reduces the concentration of ions present in an acid or a base to become more dilute.

The statement that is FALSE regarding the Volcanoes found on the Tralfamadore map is:

D) The Basaltic type volcano(s) have 45-55% SiO2 AND have low Gas content.

Basaltic-type volcanoes are characterized by high iron content and low potassium content. They typically have temperatures ranging from 1000-1200 degrees Celsius. However, their SiO2 content is generally lower than 45-55%, making this statement incorrect. Basaltic lavas are known for their low viscosity and high fluidity, which can result in relatively high gas content and the eruption of gas-rich lava flows.

The other statements, A, B, C, E, and F, describe accurate characteristics of different volcano types found on the Tralfamadore map, including their chemical composition, viscosity, gas content, and temperature ranges.

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The minimum amount of oxygen required for the complete combustion of 20cm³ of CO and 20cm³ of H₂ would be 20.16 cm³ at STP.

The balanced chemical equation for the combustion of CO and H2 is:

CO + 1/2O2 → CO2

H2 + 1/2O2 → H2O

From the equation, we can see that one mole of CO requires 1/2 mole of O2, while one mole of H2 requires 1/2 mole of O2.

From the balanced equation, we can see that each mole of CO requires 1/2 mole of O2, while each mole of H2 requires 1/2 mole of O2.

Therefore, we need 0.00083/2 = 0.00042 moles of O2 for the combustion of CO and the same amount for the combustion of H2.

The total amount of O2 required is the sum of the amounts needed for each reactant:

Therefore, the minimum amount of oxygen required for the complete combustion of 20 cm³ of CO and 20 cm³ of H2 is approximately 20.16 cm³ at STP.

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To calculate the volume of chlorine used, we need more information about the context or the specific chemical reaction.

However, if we assume a scenario where 1 mole of chlorine gas (Cl₂) is consumed, the volume of chlorine used would be 22.4 dm³. This value is based on the molar volume of a gas at standard temperature and pressure (STP), which is 22.4 dm³/mol.

The molar volume of a gas at STP is a constant value, which means that 1 mole of any ideal gas occupies 22.4 dm³. In the case of chlorine gas (Cl₂), it consists of two chlorine atoms (Cl) bonded together. Since the atomic mass of chlorine (Cl) is 35.5 g/mol, the molar mass of chlorine gas (Cl₂) would be 2 * 35.5 g/mol = 71 g/mol.

Knowing the molar mass, we can use the concept of the molar volume to calculate the volume of chlorine gas consumed. For every 1 mole of chlorine gas used, the volume would be 22.4 dm³. However, please note that this calculation assumes a hypothetical scenario with 1 mole of chlorine gas. In practical situations, the volume of chlorine used will depend on the stoichiometry of the reaction and the amounts of reactants involved.

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Answer: The economic demands of Plan B were too high.

Explanation: During the selection of any action plan to maintain biodiversity, several factors must be considered. These factors include the cost of the plan, the estimated effectiveness of the plan at protecting the targeted populations, and how the plan will affect both humans and other populations in the area.

The chart shows that the approximate cost of implementing Plan A was $5 billion. The approximate cost of implementing Plan B was $30 billion. While Plan B might have been more effective at reducing habitat destruction, and thus maintaining biodiversity, state officials likely chose Plan A over Plan B because the economic demands of Plan B were too high.

Answer: The economic demands of Plan B were too high.

Explanation:

just did it

Answer:

Earthwares

porcelain

bricks

Answer:

$8.00

Explanation:

5 yards = $40.00

1 yard = x

therefore, x = $40.00/5

x = $8.00

i.e, 1 yard = $8.00

When \(CO_{2}\) and \(H_{2} CO_{3}\) are both horizontal lines, the rate of the forward reaction is the same as the rate of the reverse reaction. The reaction is occurring at equilibrium, with no net change in the concentrations of reactants and products over time.

When the concentration of carbon dioxide \(CO_{2}\) and the concentration of carbonic acid \(H_{2} CO_{3}\) are both horizontal lines, it indicates that their concentrations remain constant over time. In such a scenario, the rate of the forward reaction is the same as the rate of the reverse reaction. A horizontal line on a concentration-time graph suggests that the concentrations of the reactants and products are not changing, implying that the reaction has reached equilibrium. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. This is a fundamental principle of chemical equilibrium, described by the principle of microscopic reversibility.

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Answer:

The simple answer is that they are all crystals.

Explanation:

Most people when they think of crystals think of Diamond, Quartz, Rubies and other gemstones. However, there are many more crystals all around us in the world.

Answer:

Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.

Explanation:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

The number of protons, neutrons, and electrons are Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.

Protons, neutrons, and electrons are charged particles present inside the atom. Atoms are the basic unit of all matter. They together constitute the matter.

Protons are positively charged particles and neutrons are neutral particles. Neutrons and protons are present inside the nucleus of the atom. And electrons revolve around the nucleus in the orbitals of the atom.

In a neutral atom, there are exactly as many electrons as protons. The total number of protons and neutrons in the atom's nucleus is equal to the mass number (M) of the atom.

Thus, Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.

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The value of the dissociation constant, kd, for the complex ion Zn(NH₃)₄²⁺ is 3.4 × 10⁻¹⁰.

the dissociation of Zn(NH₃)₄²⁺ is given as follows :

                    kd

Zn(NH₃)₄²⁺(qa)   ⇄   Zn²⁺(aq)   +  4NH₃(aq)

                      kf

the dissociation constant kd is given as :

kd = [Zn²⁺] [ NH₃]⁴ / [ Zn(NH₃)₄²⁺ ]

the kf is the reciprocal of the kd , that means :

kd = 1 / kf

the kf  for Zn(NH₃)₄²⁺ is 2.9 × 10⁹

therefore :

kd = 1 /  2.9 × 10⁹

kd = 0.344 × 10⁻⁹

kd = 3.4 × 10⁻¹⁰.

Thus, the dissociation constant Zn(NH₃)₄²⁺ is 3.4 × 10⁻¹⁰.

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\(CS_2\)  is the limiting reactant in the reaction.

The balanced chemical equation for the reaction is:

3 \(CS_2\) + 6 \(NaOH\) → 2 \(Na_2CS_3\) + \(Na_2CS_3\) + 3 \(H_2O\)

To determine the limiting reactant, we need to calculate the amount of product that each reactant can produce and compare it to the actual amount of product that is formed.

First, we need to convert the mass of \(CS_2\) to moles:

118.3 g \(CS_2\) × (1 mol \(CS_2\) /76.14 g \(CS_2\)) = 1.555 mol \(CS_2\)

Next, we need to calculate the amount of product that can be formed from 1.555 mol of \(CS_2\). According to the balanced equation, 3 mol of \(CS_2\) will produce 2 mol of \(Na_2CS_3\). Therefore, 1.555 mol of \(CS_2\) will produce:

(2/3) × 1.555 mol = 1.037 mol \(Na_2CS_3\)

Now, let's calculate the amount of product that can be formed from 3.12 mol of \(NaOH\). According to the balanced equation, 6 mol of \(NaOH\) will produce 2 mol of \(Na_2CS_3\). Therefore, 3.12 mol of \(NaOH\) will produce:

(2/6) × 3.12 mol = 1.04 mol \(Na_2CS_3\)

Comparing the amount of product that can be formed from each reactant, we see that 1.037 mol of \(Na_2CS_3\) can be produced from the 1.555 mol of \(CS_2\), while 1.04 mol of \(Na_2CS_3\) can be produced from the 3.12 mol of \(NaOH\). Therefore, the limiting reactant in the reaction is \(CS_2\).

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Answer:

45 500 meters

Explanation:

45 500 meters is your answer]

Glad to help!!

Answer:

Uranium-238 undergoes alpha decay to become thorium-234. (The numbers following the chemical names refer to the number of protons plus neutrons.) In this reaction, uranium-238 loses two protons and two neutrons to become the element thorium-234.

Explanation:

Answer:

Methane (CH4),Carbondioxide green house gases are carbon compounds

Carbon dioxide (CO2) and methane (CH4) are two powerful greenhouse gases produced by the carbon cycle.

Answer:

Explanation:

the answer is sirius

At the end of glycolysis, one can find the energy that was contained in the chemical bonds of glucose in ATP, NADH and pyruvate molecule.

The process of glycolysis takes place in the cytosol of a cell. It can be broken down into two phases viz. energy requiring phase and energy releasing phase.

Energy requiring phase: The starting molecule i.e glucose is at first rearranged and two phosphate groups are attatched to it, which comes from ATP.  The phosphate groups form the sugar- fructose-1,6-biphosphate. This splits into three-carbon sugars

Energy releasing phase: The three carbon-sugars are converted into three-carbon molecules i.e two ATP molecules and one NADH molecule and pyruvate.

Thus, in ATP, NADH and pyruvate we can find the energy contained in chemical bonds of glucose.

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The option which gives the correct mole ratios is H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

It is a conversion factor between compounds in a chemical reaction, that is derived from the coefficients of the compounds in a balanced equation

Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

The balanced equation for given reaction is as follows ;

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

Molar ratio can be determined by the coefficients of the compounds in the balanced reaction

Coefficient is the number in front of the chemical compound and they are as follows

Therefore, correct option is H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

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