1. A student in lab measures 4.6 grams of copper for an experiment. Upon further analysis he determines that he should have measured out 4.7 grams of copper. What is his percent error?

Answer:

23.0 s⁻¹ is rate constant

Explanation:

Using the Arrhenius equation:

k = A * e^(-Ea/RT)

Where k is rate constant

A is frequency factor (1.5x10¹¹s⁻¹)

Ea is activation energy = 55800J/mol

R is gas constant (8.314J/molK)

And T is absolute temperature (24°C + 273 = 297K)

Replacing:

k = 1.5x10¹¹s⁻¹ * e^(-55800J/mol/8.314J/molK*297K)

k = 1.5x10¹¹s⁻¹ * 1.53x10⁻¹⁰

The total mass of the products is 853.8 g.

We know that we have to apply the principles of stoichiometry so as to be able to obtain the mass of the mass of the products and then the total mass of the products that is obtained in the reaction.

We have that in the question; 496. 5 grams of lead II nitrate reacts with potassium bromide is such a way that the lead II nitrate would be completely consumed in the reaction. This means that the lead II nitrate is the limiting reactant in the reaction.

Number of moles of the lead II nitrate = 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced = 1.5 moles * 367 g/mol

= 550.5 g

If 1 mole of lead II nitrate produces 2 moles of potassium nitrate

1.5 moles of lead II nitrate produces  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate = 3  moles * 101.1

= 303.3 g

Total mass produced = 550.5 g + 303.3 g

= 853.8 g

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Answer:

I took a screen shot of your image, and wrote on top of it!

Explanation:

Hope this helps! :)

Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.

Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.

The three main types of recrystallization are;

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Answer:

it would be 615

Explanation:

Answer: combustion

Explanation:

Combustion reactions can be identified by looking at the reactants and the products.

Usually, the reactants will be a hydrocarbon and oxygen. And the products will be CO2 and H2O

Answer:

Combustion reaction.

Explanation:

1. The nucleus of the atom is composed of protons and neutrons. The nucleus is surrounded by electrons. Positive charge characterizes protons. Negative charge characterizes electrons.

2. Protons and neutrons contribute to the mass of the atom (atomic mass), and surrounded by the electrons.

3. The number of protons identifies as each element, each element has a unique number of protons in the nucleus of its atoms, Z, which determines the identification of the element.

4. If an atom containing 12 neutrons and 11 protons has atomic mass equal to 23.

5. There is just one orbital at the lowest energy level, and it can only accommodate a maximum of two electrons. The force of attraction between the protons and electrons is larger in the nucleus because there are more protons there.

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Answer:

c) The natural home or environment of an animal, plant, or other organism

Explanation:

Please note that in order to post questions in Science, you must post in Science section, but not in History. You are asking a wrong question in the wrong section.

Thank You! Please Mark Brainliest! :)

The original concentration of the HCl solution was 0.0467 M. We use the concept of stoichiometry and the balanced chemical equation for the reaction between NaOH and HCl: NaOH + HCl → NaCl + H₂O

From the equation, we know that 1 mole of NaOH reacts with 1 mole of HCl. Therefore, we can use the following equation to calculate the number of moles of HCl in the solution:

moles of HCl = (volume of NaOH in liters) x (molarity of NaOH)

We are given that it takes 5 mL of 1.4 M NaOH to neutralize the acid. To convert 5 mL to liters, we divide by 1000:

volume of NaOH = 5 mL / 1000 = 0.005 L

Substituting the values into the equation, we get:

moles of HCl = (0.005 L) x (1.4 mol/L) = 0.007 moles

Since the reaction is a neutralization reaction, the number of moles of HCl must be equal to the number of moles of NaOH used. Therefore, we can use the same equation to calculate the original concentration of the HCl solution:

moles of HCl = (volume of HCl in liters) x (molarity of HCl)

We know the volume of HCl is 150 mL, which is equivalent to 0.150 L. Substituting the values into the equation, we get:

0.007 moles = (0.150 L) x (molarity of HCl)

Solving for the molarity of HCl, we get:

molarity of HCl = 0.007 moles / 0.150 L = 0.0467 M

Therefore, the original concentration of the HCl solution was 0.0467 M.

In summary, the original concentration of the HCl solution was 0.0467 M. We used the balanced chemical equation and the concept of stoichiometry to calculate the number of moles of HCl in the solution, and then used the same equation to calculate the original concentration of the HCl solution.

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Answer:

a

Explanation:

organs are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system. The small intestine has three parts.

Answer:

basahin mo module mo

Explanation:

coz y nut

Answer:

These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres.

Explanation:

These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres.

Answer:

hydrosphere

A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air. A planet's hydrosphere can be liquid, vapor, or ice. On Earth, liquid water exists on the surface in the form of oceans, lakes and rivers.

Answer:

it decrease when a solution becomes more acidic which means that decrease in pH means increase..

Answer:

it's ph decreases.. meaning those with a small ph value are more acidic.forinstance one with a ph of 1 is more acidic than the one with a ph of 3.

I hope this helps

Saturn Systems Inc., a company with its headquarters in the US, is acting unethically.

The most frequent ethical concerns in the context of international business are related to labor laws, human rights, environmental laws, corruption, and the moral responsibility of multinational firms. When a person, a professional, or an industry acts in a way that is deemed unethical because it goes against social norms, that behavior is referred to as unethical behavior. Politicians, businesses, professions, and individuals all have the potential to act unethically. The following are some examples of unethical behavior in the workplace: asking for credit for someone else's work, calling in sick to go to a hill station, undermining someone else's work, and, in sales, fabricating the product or service to meet the objective.

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Answer:

is there supposed to be a photo with this?

Explanation:

The bond between the H of one water molecule and the O of another water molecule is an example of hydrogen bonding.

Hydrogen bonding is defined as the interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons. Usually hydrogen bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.

For example, in water molecules (H₂O), hydrogen is covalently bonded to the more electronegative oxygen atom. Therefore, hydrogen bonding arises in water molecules because of the dipole-dipole interactions between the hydrogen atom of one water molecule and the oxygen atom of another H₂O molecule.

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Answered it coz of you

Any doubts just ping me

follow meh

Answer:

the answer is B

Answer:

If the temperature of the system is increased, then the equilibrium position would shift to the right side. According to Le Chatelier's principle, when a stress is applied to a system in equilibrium, the system will adjust itself to counteract the stress. In this case, increasing the temperature would be an external stress on the system, and the reaction would shift to consume more of the reactants, namely CH4 and H2S, to create more of the products, CS2 and H2, thus shifting the equilibrium position towards the products.

Explanation:

True. For these before leaving the ER undergo a process called N-terminal signal peptide cleavage. During this process, the signal peptide, which is an amino acid sequence that helps guide the protein into the ER, is cleaved, resulting in a smaller polypeptide.

Polypeptides are composed of a variety of different amino acids that are linked together in a sequence. This sequence of amino acids determines the structure and function of the protein that they make up. Polypeptides are essential components of cells, playing a role in many essential processes, including:

They are found in the cytoplasm and nucleus of cells, as well as in extracellular fluid. Polypeptides are also important components of:

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The measurement of the outcome in both groups after the experimental group has received treatment is called post-test or post-measurement. It is a way to assess whether the treatment had any effect on the outcome being measured.

By comparing the post-test results of the experimental group to those of the control group, researchers can determine whether the treatment had a significant effect. This is an important step in evaluating the effectiveness of an intervention or treatment in a scientific study.

Post-measurement refers to the measurement of the outcome or variable of interest after an experimental intervention or treatment has been administered to a group of participants. It is a way to evaluate the effectiveness of the treatment in producing the desired outcome. The post-measurement is typically compared to a pre-measurement or baseline measurement taken prior to the intervention or treatment, in order to assess any changes that have occurred as a result of the treatment

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Answer:

According to my opinion The option is C

Explanation:

Because atomic radius decreases across a periond and increase along a group.

Answer:

nucleotides

Explanation:

Hope this helps :D

Answer:

dna is made up of nucleotides!

Explanation:

hope this helped

Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. This is a strategy to use when calculating the theoretical yield of a chemical reaction. The same strategy can be applied to determine the amount of each reagent needed to produce a desired amount of product.

   The mole ratio is the stoichiometric ratio between the amount of one compound and the amount of another compound in a reaction. For this reaction, for every two moles of hydrogen gas used, two moles of water are produced. The mole ratio between H2 and H2O is 1 mol H2/1 mol H2O.

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I am not sure of the answer to this question right now, but I need to know if you remember me