FILL IN THE BLANK adam is trying to identify a solid. he places a small amount of the substance in an acid solution and observes whether or not a reaction takes place. this test is based on a_________ property.

Hi just wanted to say thank you for answering my question and I wanted to help so I believe the answer is A.

Answer:

Meaning, Advantages & Disadvantages of - Osmosis, Multiflash Distillatiob

Explanation:

Advantages - It assists equalising concentration of solute on two sides of membrane. Reverse Osmosis is used for efficient water softening, it is easy to maintain.

Disadvantages - It needs a lot of energy. A lot of pressure is required for deionisation. Water acidity level increases, as minerals get deionised.

Advantages - Its Cost efficient , distillation uses waste heat. It has High gain output ratio. Quality of feedwater is less significant, compared to reverse osmosis.

Disadvantages - It has high operating cost in case of waste heat unavailability. High temperature imply high corrosion & scale formation.

Answer:

silicon tetrachloride or tetrachlorosilane

Answer:

All known vaccine molecules must be tested to find the right one.

Explanation:

I took the test

The percentage by mass of hydrogen can be calculated from the problem as 2.016

To calculate the mass percent of an atom in a compound, you first need to determine the molar mass of the compound and the molar mass of the atom of interest.

Determine the molar mass of the compound by adding up the atomic masses of all the atoms in the compound.

Determine the number of moles of the atom of interest in one mole of the compound. This is done by dividing the atomic mass of the atom by the molar mass of the compound.

We know that the relative molecular mas of the compound is; 300 g/mol

Then;

Percent by mass of hydrogen is; 6/300 * 100/1

= 2.016%

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The reaction's chemically balanced equation is as follows:3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4

The reaction's chemically balanced equation is as follows:3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4A chemical reaction that has the same number of moles in the reactant and product sides is said to have a balanced chemical equation.

Determining that the chemical reaction is a balanced chemical equation, it follows the law of conservation of mass.

The missing image, which is included below, shows what the picture represents:

The side that reacts:

Three molecules each of CH4 and N2Cl4

The component side:

6 molecules of H2, 3 molecules each of CCl4, N2, and 3.

Consequently, the following is the reaction's balanced chemical equation:

3CCl4 + 3N2 + 6H2 = 3CH4 + 3 N2Cl4

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Answer: 7 g

Explanation: 42/6=7

Sodium carbonate, also known as washing soda or soda ash, has a wide range of applications. Sodium carbonate can be naturally occurring or synthetically produced through various methods, including the Solvay process, which is the most common method of industrial production.

Sodium carbonate, also known as washing soda or soda ash, has many uses, including:

1) Cleaning agent: Sodium carbonate is an effective cleaning agent due to its alkaline nature. It is used in laundry detergents and household cleaners to remove stains and grease from clothes and surfaces.

2) Industrial applications: Sodium carbonate is used in a variety of industrial applications. It is used in the production of glass, pulp and paper, and soaps and detergents. It is also used as a water softener and pH regulator in chemical processes.

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Answer:

V1 = 8.3 mL

Explanation:

Step 1: Given data

Initial volume (V1): ?

Initial concentration (M1): 6.0 M

Final volume (V2): 50.0 mL

Final concentration (M2): 1.0 M

Step 2: Calculate the volume of the initial solution

We want to prepare a dilute solution from a concentrated one. We can calculate the volume of the initial solution using the dilution rule.

M1 × V1 = M2 × V2

V1 = M2 × V2 / M1

V1 = 1.0 M × 50.0 mL / 6.0 M = 8.3 mL

We will take 8.3 mL of the 6.0 M solution and add water until we have 50.0 mL.

A compound with a formula of C₉H₁₂ and a 1H NMR spectrum of delta 1.0 (t, 3 H), delta 1.7 (sextet; 2 H), delta 2.6 (t, 2 H), delta 7.2 (m, 5 H) s C₆H₅CH₂CH₂CH₃.

The method of spectroscopy known as nuclear magnetic resonance, more usually abbreviated as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is used to study the local magnetic fields that surround atomic nuclei.  The sample is then placed in a magnetic field, and the NMR signal is produced by exciting the nuclei of the sample with radio waves to produce nuclear magnetic resonance.

This signal is then detected using sensitive radio receivers. Because of the change in resonance frequency brought about by the presence of an intramolecular magnetic field surrounding an atom in a molecule, it is possible to obtain information regarding the electronic structure of a molecule and the particular functional groups that it contains.

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Answer:

July/the winter

Explanation:

Pls answer my question https://brainly.com/question/18950623

July, I just took the test

Answer: omg this is so old! :D but its D!

Explanation:

The cells that has been composed of the indifferent number chromosomes as compared to other cells have been reproductive cells. Thus, option D is correct.

Cells have been the smallest and the unit of life. The cells have been composed of the pairs of chromosomes in higher organisms. There has been the presence of 46 chromosomes i.e. 23 pairs of chromosome. However, the chromosomes in the cell have been diploid i.e. in set of 2.

The reproductive cells have been resulted in the formation of the new cells. So they have been consisted of the cells with the half the number of chromosomes and are haploid in nature.

Thus, the cells that have different number of chromosomes as compared to the other cells have been reproductive cells. Thus, option D is correct.

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Answer:

Physical Property

Explanation:

As there is no chemical change or chemical related stuff in it!

Answer:

physical

Explanation:

Answer:

The volume of Component 1 is 36 cubic inches.

Explanation:

To calculate the volume of a composite solid, we need to determine the individual volumes of the different components and then add them together.

In this case, the composite solid consists of multiple components with the following dimensions:

Component 1:

Length: 4 inches

Width: 3 inches

Height: 3 inches

To find the volume of Component 1, we multiply the length, width, and height together:

Volume of Component 1 = Length x Width x Height = 4 in x 3 in x 3 in = 36 cubic inches

Therefore, the volume of Component 1 is 36 cubic inches.

Please provide the dimensions of the remaining components of the composite solid, and I will calculate the total volume by summing up the individual volumes.

If one of the elements is a metal and the other is a nonmetal, they will most likely form an ionic bond. Monatomic cations and anions make up these kinds of ionic compounds.

The reactivity of an atom—or propensity to establish chemical interactions with other atoms—depends on the amount of electrons in its outermost shell.

The number of protons in a particular atom, which is an element's smallest building block, is how an element is defined. A compound, on the other hand, is made up of different atoms, and the smallest component of a compound is a molecule.

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Answer:

The amount of water vapor in air influence density. Water vapor is relatively light compared to diatomic Oxygen and diatomic Nitrogen - the dominant components in air. When vapor content increases in moist air the amount of Oxygen and Nitrogen are decreased per unit volume and the density of the mix decreases since the mass is decreasing.

Explanation:

Answer:

Oxygen reduction reaction

Explanation:

Pt is used as the catalyst for both the hydrogen oxidation reaction (HOR) occurring at the anode and the oxygen reduction reaction (ORR) at the cathode. Usually, the Pt catalyst takes the form of small particles on the surface of somewhat larger carbon particles that act as a support.

The mass of H₂O produced when 40000 g of C₂H₂ burns completely is 27692.3 g.

The mass of water produced when 40000 g of C₂H₂ burns completely in the air is determined from the mole ratio as given in the equation of the reaction as follows;

Equation of reaction: 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g)

The molar mass of C₂H₂ = 26 g

The molar mass of water = 18 g

The mole ratio of C₂H₂ to H₂O is 1 : 1

The mass of water produced = 40000/26 * 18 g

The mass of water produced = 27692.3 g

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The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.

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Answer:

The answer is "Radium is a radioactive isotope produced by spontaneous decay of its atoms of uranium, which would be a radioactive element in of itself".

Explanation:

With the symbol Ra as well as the atomic mass 88, radium is a chemical element. It is the 16th element of its periodic table and also referred to as alkaline earth metals, in group 2. It is the element, which is formed by the spontaneous decay of uranium atoms, a radioactive element in itself.

Answer:

0.422 M

Explanation:

Equation of the reaction,

2HCl(aq) + Ba(OH)₂(aq) ⇒ BaCl₂(aq)+2H₂O(l)

From the recation above,

2 moles of HCl is needed to neutralize 1 mole of Ba(OH)₂.

Using,

C'V'/CV = a/b......................... Equation 1

Where C' = concentration of acid, C = concentration of base, V' = volume of acid, V = volume of base, a = number of moles of acid, b = number of moles of base.

make C' the subject of the equation.

C' = aCV/bV'................. Equation 2

a = 2 mole, b = 1 mole, C = 0.0154 M, V = 27.4 mL, V' = 20 mL

Substitute into equation 2

C' = (2×0.0154×27.4)/(1×20)

C' = 0.422 M.

Hence the concentration of acid is 0.422 M

Answer:

Explanation:

We are to carefully sketch a curve that relates to the potential energy of two O atoms versus the distance between their nuclei.

From the diagram, O2 have higher potential energy than the N2 molecule. Because on the periodic table, the atomic size increases from left to right on across the period, thus O2 posses a larger atomic size than N2 atom.

Therefore, the bond length formation between the two O atoms will be larger compared to that of the two N atoms.

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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It is the 4th scenario is the dependent event. There are 7 gold tokens and 4 silver tokens in a cup. The first student randomly draws a gold token and keeps it. A second student randomly draws a gold token from the cup.

The fouth scenario is a dependent event because the probability of the second student drawing a gold token is affected by the outcome of the first student's draw.

If the first student draws a gold token, then there are only 6 gold tokens left in the cup, the probability changes. but  if the first student does not draw a gold token, then there are 7 gold tokens left in the cup, the probability will remain the same

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Answer:

collagen

Explanation:

Answer:

B. Collagen EDG 2021

Explanation:

The concentration of the unknown \(H_3PO_4\) solution would be 0.0368 M

The equation of the reaction is as follows:

\(H3PO_4(aq)+3NaOH(aq)--- > 3H_2O(l)+Na_3PO_4(aq)\)

The mole ratio of the  \(H_3PO_4\) solution to the NaOH solution is 1:3.

But 0.140 M, 25.24 mL of NaOH was used.

Recall that: mole = molarity x volume (in Liters)

Mole of 0.140 M, 25.24 mL of NaOH = 0.140 x 25.24/1000

                                                             = 0.0035336 mol

Following the mole ratio, the equivalent mole of \(H_3PO_4\) would be:

0.0035336 /3 = 0.00117786666

Recall that: molarity = mol/volume (in Liters)

Molarity of 0.00117786666 mol, 32.00 mL \(H_3PO_4\) = 0.00117786666/0.032

                                                                                  = 0.0368 M

In other words, the molarity of the \(H_3PO_4\) solution to 3 significant figures is 0.0368 M.

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

0.001 mol/dm^3.

Explanation:

The pH of a solution is defined as the negative base-10 logarithm of the concentration of hydrogen ions (H+) in moles per liter (M).

The pH of 3 moldm^-3 means the concentration of hydrogen ions in the solution is:

[H+] = 10^(-pH) mol/L

[H+] = 10^(-3) mol/dm^3

[H+] = 0.001 mol/dm^3

Therefore, the concentration of H+ in pH 3 moldm^-3 is 0.001 mol/dm^3.