Find the mass percent of CuSO4 in a solution whose density is 1.30 g/mL and whose molarity is 1.36 M.

The structure of ethane can be represented as:

\(\[\text{H} - \text{C} - \text{C} - \text{H}\]\)

Optical inactivity is observed when a molecule lacks an asymmetric center or chiral centre. An asymmetric center is a carbon atom that is bonded to four different substituents. In the absence of an asymmetric center, the molecule will be optically inactive.

A simple example of a molecule without an asymmetric center is \textbf{ethane} (\(C_2H_6\)). Ethane consists of two carbon atoms bonded to each other by a single bond, with three hydrogen atoms attached to each carbon atom.

The structure of ethane can be represented as:

\(\[\text{H} - \text{C} - \text{C} - \text{H}\]\)

The chemical formula for ethane, a paraffin series hydrocarbon (compound of hydrogen and carbon), is C2H6. It is a colourless, odourless, gaseous hydrocarbon. The only hydrocarbon with a single carbon-carbon bond has the simplest structural makeup, and that is ethane.05

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The balanced equation of magnesium and sulfuric acid is:

The student was have seen an explosive reaction if sodium was placed in water.

The order of the reactivities of the metals from most to least reactive is: lithium >> calcium >> copper

It would be difficult to determine the order of reactivity of magnesium and zinc because they show the same reaction. This can be determined by finding out which metal displaces the other from the solution of their salt.

Reactive metals are metals that easily form positive ions by readily giving up or donating their electrons.

The reactive metals are mainly found in group 1A and group 2A of the periodic table.

Reactive metals react with water to liberate hydrogen gas.

For example: 2 Li (s) + 2 H₂O ---> 2 LiOH (aq) + H₂ (g)

Reactive metals react with dilute acids to liberate hydrogen gas and form salts.

Mg + 2 HCl (aq) ---> MgCl₂ (aq) + H₂ (g)

The rate of the reactions above decreases with a decrease in the reactivity of the reactive metals.

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The nutrition label is the representation of the calories provided by the molecules. If Eva eats the whole package weighing 0.150 pounds then she consumed 207.9 calories.

The nutrition label has been seen on packaged food items and is a representation of the nutrient values given by the ingredients like the fat, carbohydrates, proteins, fats, fiber, minerals, vitamins, etc. in per serving amount.

Given,

One serving weighs = 36 grams

Calories per serving = 110 calories

Total box weighs = 0.150 pounds

It is known that 1 pound = 453.592 grams

Then, 0.150 pounds = 68.03886 grams

If 36 grams = 110 calories

Then, 68.04 grams = X calories

Solving for X as:

X = (110 calories × 68.04 grams) ÷ 36 grams

X = 207.9 calories

Therefore, Eva consumes 207.9 calories.

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Here is your answer look at your image below

Chemical equilibrium can be disturbed by changes in the concentration of one or more substances or by changes in the pressure or temperature.

Chemical equilibrium is a state in a reversible chemical reaction where the forward and backward reaction rates are equal. It is governed by the equilibrium constant, which is determined by the concentrations of the reactants and products. Any changes that affect these concentrations can disturb the equilibrium.

Changes in concentration: Altering the concentration of reactants or products can shift the equilibrium position. Increasing the concentration of a reactant will drive the reaction towards the product side, while increasing the concentration of a product will favor the reactant side. Decreasing the concentration of a species will have the opposite effect.

Changes in pressure: Only applicable to reactions involving gases, changes in pressure can impact equilibrium. According to Le Chatelier's principle, an increase in pressure will shift the equilibrium towards the side with fewer moles of gas, while a decrease in pressure will favor the side with more gas molecules.

Changes in temperature: Altering the temperature affects the equilibrium constant. Endothermic reactions absorb heat, so increasing the temperature will favor the product side, while decreasing the temperature will favor the reactant side. Exothermic reactions release heat, so the opposite temperature effects occur.

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The dilution of hydrogen peroxide that would not be considered an effective disinfectant is any solution with a Hydrogen peroxide concentration that is lower to 3%.

Hydrogen peroxide is one of the most common antiseptics. This means it is a substance used as a disinfectant either on surfaces or in small wounds, although its use on wounds is discouraged.

In most cases, hydrogen peroxide is not found as a pure substance but as a dilution, which means hydrogen peroxide is mixed with other substances such as water to decrease its concentration.

The ideal concentration of hydrogen peroxide is 3%, this concentration makes it an effective disinfectant. In the same way, a lower concentration would not have effectiveness in terms of disinfection.

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If a material is ohmic, the resistance is expected to be constant. An ohmic material is a material that follows Ohm's law. In other words, the electric current flowing through the material is proportional to the potential difference or voltage applied across the material at a constant temperature and pressure.

The resistance of the ohmic material is defined by the ratio of the potential difference applied to the current flowing through the material. If a material follows Ohm's law, it is considered to be an Ohmic material. In ohmic materials, the resistance is constant, meaning it doesn't vary as the voltage and current change. If the current through an ohmic material is doubled, the voltage across the material is also doubled.

Hence, the resistance of the material remains constant. In contrast, the resistance of non-ohmic materials varies with voltage and current. Resistance is the degree to which an object opposes the flow of electrical current. The resistance of a material depends on its physical properties such as length, cross-sectional area, and temperature. The resistance of a conductor is defined by the ratio of the voltage applied across it to the current that flows through it. The unit of resistance is ohms (Ω).

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When copper wire and nitric acid react, the following takes place: Cu + 4HNO3 → Cu (NO3)2 + 2NO2 + 2H2O. Copper (II) nitrate (Cu(NO3)2) is the copper compound that exists in the solution after the reaction with nitric acid.

Copper wire reacts with nitric acid to produce nitric oxide, which is a toxic gas. When the nitric oxide dissolves in water, it forms nitric acid. Because nitric oxide is a powerful oxidizing agent, it causes the copper to dissolve in nitric acid, forming copper (II) nitrate. Copper (II) nitrate is a blue solid that is water-soluble. The reaction is as follows: 3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O

When copper reacts with nitric acid, it creates a brown gas which is nitric oxide. This reaction is exothermic, which means that it releases heat. As the copper wire reacts with the acid, the brown gas produced can be seen, and the mixture warms up. As a result, copper oxide and copper (II) nitrate are created. The final chemical equation for the reaction is: Cu + 4 HNO3 → Cu(NO3)2 + 2 NO2 + 2 H2O.

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Answer:

a; increasing fraction

Explanation:

Answer:

Yup B

Explanation:

Answer:

11 and equals the number of protons

Explanation:

Answer:

ionic compound

Explanation:

ionic bonding

In ionic bonding, electrons are completely transferred from one atom to another. In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions.

pls vote brainliest it would rlly help me out ❤❤❤

Yes, Water moves through osmosis as it transitions from a high concentration to a low concentration. Osmosis via the dialysis tube was demonstrated by the fact that there was an increase in liquid in the dialysis bag and a decrease in water and iodine solution in the cup.

Osmosis is the passage of water through a membrane, and movement occurs continuously. A membrane is not required for diffusion, which is the movement of molecules.

They both transition from a high concentration to a low concentration, they don't require energy, and they happen in both plants and animals.

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Answer: I HAVE ATTACHED PROOF SO DONT REMOVE MY ANSWER, MODS.

1. NO

2. NO

Answer: 1. NO 2. NO

Explanation: Just did it and got it correct.

6 mole of water is there. It is established that the mole consists of precisely 6.022×10²³  elementary components.

The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). How many elementary units of a certain substance are present in an item or sample is determined by the quantity of that material.

It is established that the mole consists of precisely 6.022×10²³  elementary components.

2H\(_2\) + O\(_2\) → 2H\(_2\)O

moles of H₂ =6 moles

the mole ratio between H\(_2\)  and H\(_2\)O is 1:1

moles of H\(_2\)O = 6 moles

Therefore,  6 moles of water is there.

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Answer:

143.991

Explanation:

47.997 * 3 = 143.991

The formula for a compound made from x2 and y- can be predicted using the crisscross method.

X2 has a charge of 2+ while y- has a charge of 1-. To form a neutral compound, the charges must balance each other.

To do this, the charge of x2 will become the subscript of y, and the charge of y- will become the subscript of x2.

Thus, the formula for the compound will be written as X2Y.

This indicates that two atoms of x combine with one atom of y to form the compound.

The compound may have different properties and characteristics depending on the identity of the elements X and Y.

Overall, the crisscross method is an effective way to predict the formula of an ionic compound.

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After mixing 15.0 mL of 0.100 M NaOH with 25.0 mL of 0.100 M HCl, the resulting solution will have a pH of approximately 1.20.

The pH of a 5 x 10^(-3) M HClO4 solution is approximately 2.30, and the [OH-] (hydroxide ion concentration) can be calculated as follows:

[OH-] = 10^(-pOH)

Since pOH + pH = 14, we can calculate the pOH by subtracting the pH from 14, giving us a pOH of approximately 11.70. Therefore,

[OH-] = 10^(-11.70)

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The mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄ is 20.4 g.

An equation is a mathematical statement that describes the equality of two expressions. Equations are typically expressed using symbols and mathematical operators and can contain constants, variables, and functions. Equations are commonly used to model real-world problems and can be used to describe the relationships between different physical or mathematical phenomena. In mathematics, equations are often used to solve for unknowns or to find the maximum or minimum value of a function.

The balanced equation for the reaction between \(CaCl_2 (aq) and K_3PO_4 (aq) is: 3CaCl_2 (aq) + 2K_3PO_4 (aq) \rightarrow Ca_3(PO_4)_2 (s) + 6KCl (aq)\)

We can use this equation to calculate the mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄. Since the ratio of CaCl₂ to K₃PO₄ is 3:2, we can divide 40.8 by 2 to get the mass of CaCl₂ required: 40.8/2 = 20.4 g of CaCl₂.

Therefore,The mass of CaCl₂ in grams that is required to react completely with 40.8 g of K₃PO₄ is 20.4 g.

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Answer:

8.24 mL

Explanation:

Density can be defined as mass per unit volume, according to the relationship shown in the attached image. Moles (a unit of measurement for small entities) can also be related to mass. Let's look at two formulas which would be useful for answering this question.

\(\boxed{\text{Density}=\frac{\text{Mass}}{\text{Volume}} }\)

\(\boxed{\text{Mole}\times\text{Mr}=\text{Mass (in grams)}}\) , where Mr stands for relative molecular mass

From the periodic table the Mr of nickel is 58.7.

Multiply the number of moles by the Mr:

Mass of Ni

= 1.25(58.7)

= 73.375 g

Calculate the volume of Ni:

Volume

= mass ÷density

= 73.375 ÷8.90

= 8.24 ml (3 s.f.)

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Solubility product constant measures equilibrium, common ion effect reduces solubility.

The solubility product constant (Ksp) is a measure of the extent to which a solid compound dissolves in water. It represents the equilibrium constant for the dissociation of a sparingly soluble salt into its constituent ions in a saturated solution. The Ksp is calculated by multiplying the concentrations of the dissolved ions, each raised to the power of its stoichiometric coefficient.

The common ion effect refers to the reduction in solubility of a salt when a common ion is present in the solution. According to Le Chatelier's principle, the presence of an ion already present in the equilibrium equation shifts the equilibrium towards the formation of the sparingly soluble salt, thus reducing its solubility.

In summary, the solubility product constant describes the equilibrium of a sparingly soluble salt, while the common ion effect explains the decrease in solubility when a solution contains a common ion. Both concepts are fundamental in understanding the dissolution behavior of salts in aqueous solutions.

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Answer:

Make an observation.

Ask a question.

Form a hypothesis, or testable explanation.

Make a prediction based on the hypothesis.

Test the prediction.

Iterate: use the results to make new hypotheses or predictions.

Explanation:

Answer:

It's the number after what I mean is like its 12.4 mL right now skip ahead its 13.5 mL

Explanation:

I tried pls dont be mad I spent 3 hrs on this :((

Answer:

its noble gas

Explanation:

Neon is colorless and oderless

Answer:

4 mile : 253440 inches

0.004 grams : 1.814 grams

56 miles/hour : 82.133 feet per second

4.5 ml : 0.45 centilitre

34.g/ml : 74.9571691 lb/liter

30 lb: 480 ounces

Answer:

2.1056L or 2105.6mL

Explanation:

We'll begin by calculating the number of mole in 10g of Na2CO3. This can be obtained as follow:

Molar mass of Na2CO3 = (23x2) + 12 + (16x3) = 106g/mol

Mass of Na2CO3 = 10g

Mole of Na2CO3 =.?

Mole = mass /molar mass

Mole of Na2CO3 = 10/106

Mole of Na2CO3 = 0.094 mole

Next, we shall determine the number of mole CO2 produced by the reaction of 0.094 mole of Na2CO3. This is illustrated below:

Na2CO3 + 2HCl —> 2NaCl + H2O + CO2

From the balanced equation above,

1 mole of Na2CO3 reacted to produce 1 mole of CO2.

Therefore, 0.094 mole of Na2CO3 will also react to 0.094 mole of CO2.

Next, we shall determine the volume occupied by 0.094 mole of CO2 at STP. This is illustrated below:

1 mole of a gas occupy 22.4L at STP. This implies that 1 mole CO2 occupies 22.4L at STP.

Now, if 1 mole of CO2 occupy 22.4L at STP, then, 0.094 mole of CO2 will occupy = 0.094 x 22.4 = 2.1056L

Therefore, the volume of CO2 produced is 2.1056L or 2105.6mL

Arsenic poisoning affects the activity of the pyruvate dehydrogenase complex by covalently modifying the lipoamide groups on the enzyme. This inactivates the enzyme and thus inhibits its ability to catalyze the conversion of pyruvate to acetyl-CoA.

In the process of arsenic poisoning, the arsenic compounds can modify the activity of the pyruvate dehydrogenase complex by covalently modifying a lipoamide group. Arsenic binds to sulfur in cysteine residues in many proteins, which affects protein structure and activity.

The arsenic compound reacts with dithiols and covalently modifies a lipoamide group, which directly affects the E2 subunit of the pyruvate dehydrogenase complex. E2 subunit has a lipoamide group, which acts as a cofactor, and is critical for its catalytic activity. This cofactor is also important for the interactions between the E2 subunit and other subunits of the pyruvate dehydrogenase complex. Hence, when this group is modified by arsenic compounds, it can cause irreversible inactivation of the pyruvate dehydrogenase complex. As a result, pyruvate cannot be converted to acetyl CoA, and glucose metabolism is disrupted, leading to symptoms of arsenic poisoning.

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Answer:

See note in Explanation

Explanation:

The modern periodic table of the elements is arranged in order of increasing atomic numbers which is also in terms of the number of protons in the nucleus. That is, for any element listed on the periodic table its atomic number equals the number of protons in the nucleus. Thus, the element with 2 protons in its nucleus would be element #2 (Helium), element #3 (Lithium) has 3 protons in its nucleus and element #4 (Beryllium) has an atomic number 4 and contains 4 protons in its nucleus.

Also, this arrangement of elements finds that elements below elements 2, 3 & 4, Neon #10; sodium #11 & magnesium #12 have similar chemical and physical properties as does elements #2, #3 & #4. Such gives rise to the 'Periodic Law' => the chemical and physical properties of the elements is a periodic function of their atomic number (or, number of protons in the nucleus).