2. HCI
3. HCIO₂
4. HNO3
5. H,CO,
-6. H₂CO3
- H₂PO4
H₂P
HF
H₂S
12. Nitrous acid
13. Sulfuric acid
14. Permanganic acid
15. Hydrocyanic acid
16. Hydroarsenic acid
17. Hydrobromic acid
18. Hypochlorous acid
19. Chloric acid
20. Perchloric acid

All of the following are involved in eukaryotic transcription EXCEPT a rho factor. The correct answer is 2.

Eukaryotic transcription is the process by which genetic information in DNA is transcribed into RNA. This process is carried out by a large complex of proteins and enzymes, including general transcription factors, transcription activators, and a transcription initiation complex.

These proteins and enzymes work together to unwind the DNA double helix, recruit the RNA polymerase enzyme to the promoter region of the gene, and begin the process of synthesizing RNA. The rho factor is not typically involved in this process, as it is specific to prokaryotic cells and is involved in the termination of transcription.

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Answer:

Strong acids contain more A− than weak acids do.

Strong acids contain more H3O+ than weak acids do

Explanation:

When we talk about a strong acid, we are referring to any acid that is completely dissociated or ionized when it is in an aqueous solution.

It is very eager to lose a proton, H+ in solution according Arrhenius definition.

In aqueous solution, a strong acid ionizes as follows:

HA(aq) + H2O → H3O+(aq) + A−(aq)

Since, strong acids ionize completely in solution, strong acids contain a greater H3O+ and A− concentration than solutions of weak acids.

Answer:

A. Strong acids contain more A− than weak acids do.

B. Strong acids contain more H3O+ than weak acids do.

D. Strong acids contain more OH− than weak acids do.

Explanation:

Plato correct

Answer:

D

Explanation:

87 picograms are equivalent to \(8.7\times 10^{-11}\) grams.

This is a unit problem, in which a derived unit must translated into a fundamental unit. A picogram is a equivalent to a trillionth of a gram, which is the fundamental SI mass unit. Mathematically speaking, we have the following equivalence:

\(1\,pg = 1\times 10^{-12}\,g\)

Now we proceed to find the equivalent value for this case:

\(87\,pg\)

\(87\times 10^{-12}\,g\)

\(8.7\times 10^{-11}\,g\)

87 picograms are equivalent to \(8.7\times 10^{-11}\) grams.

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Answer:

0.028%

Explanation:

From the question given above, the following data were obtained:

Accepted value = 4.6026 g

Measured value = 4.6013 g.

Percentage error =..?

Thus, we can obtain the percentage error in the student's reading as follow:

Percentage error = |measured value – accepted value|/accepted value × 100

Percentage error = |4.6013 – 4.6026| / 4.6026 × 100

Percentage error = 0.0013 / 4.6026 × 100

Percentage error = 0.13/4.6026

Percentage error = 0.028%

Therefore, the percentage error in the student's reading is 0.028%

wThe question requires us to define the ways the volume of a baloon can be increased, considering number of molecules of air, temperature and pressure.

To answer this question, we must analyze the ideal gas law, which can be written as:

where P is the pressure of the system, V is its volume, n is the number of moles, R is a constant (constant of gases) and T refers to the temperature of the system.

We can rearrange this equation to analyze the effect of P, n and T over V:

Looking at the equation, we can note that temperature (T) and number of moles (n) are directly proportional to volume (V), while pressure (P) is inversely proportional.

This means that increasing / decreasing the number of moles or the temperature of the system will increase / decrease the volume, while increasing the pressure will decrease the volume (and decreasing the pressure will increase volume):

Considering the information above, we can answer the question as it follows:

• increasing the number of air molecules in the balloon

• increasing the temperature of the balloon

• decreasing the pressure on the balloon

The molecular formula of the compound CH2 with molar mass = 42.0 g/mol is C₃H₆. Therefore, option D is correct.

The term molar mass is defined as the mass in grams of one mole of a substance. The units of molar mass are grams per mole, abbreviated as g/mol.

First, let's find the molar mass of CH₂.

The molar mass CH₂= 12.0 + (2 x 1.01)

= 14.02 g/mol

Now to determine the molecular formula, we need to find the ratio based in the molar masses.

42 / 14.02

= 2.99

≅ 3

Therefore, the ratio is 3, the molecular formula is C₃H₆.

Thus, option D is correct.

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Answer:

I think it is A I am  not so sure about it

Explanation:

Answer:0.0054314469917931 mole using the molecular weight calculator and the molar mass of MgBr2.

Explanation:

Answer:

38.51g NaOH

Explanation:

NaOH=39.907 g/mol

0.965 mol NaOH X 39.90g NaoH/1 mol NaOH= 38.51 g NaOH

Answer:

80 kg

Explanation:

because the liquid with high boiling point is going to be collected the first

The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

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--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

According to the stoichiometry of the given chemical equation, the mass of solid product formed that is CuO  is 28.97 g.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

123.55 g copper carbonate gives 79.54 g copper oxide thus, 45 g copper carbonate will give 45×79.54/123.55=28.97 g.

Thus,  the mass of solid product formed that is CuO  is 28.97 g.

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Answer:

test tube

Explanation:

took the test

Answer:

Explanation: 10.05 mL

To determine the volume of the object using water displacement, we subtract the initial volume (measurement 1) from the final volume (measurement 2).

Volume = Measurement 2 - Measurement 1

Volume = 19.20 mL - 9.15 mL

Volume = 10.05 mL

Therefore, the volume of the object, as determined by water displacement, is 10.05 mL.

Since the proton is bonded to the carbon atom that is bonded to the highest number of other carbon atoms, the enol tautomer is an "e" isomer:

e-Acetone: H3C-C=O-CH3

|

H-O

To draw the "z" isomer, simply bond the proton to the carbon atom that is bonded to the lowest number of other carbon atoms:

z-Acetone: H3C-C=O-CH3

H

|

O-H

Enyol tautomers are structures of a compound that can interconvert through the movement of a proton. The two most common types of enol tautomers are the "e" and "z" isomers.

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Answer:

C. Biotechnology

Explanation:

In its broadest definition, biotechnology is the application of biological techniques and engineered organisms to make products or modify plants and animals to carry desired traits. This definition also extends to the use of various human cells and other body parts to produce desirable products.

Answer:

Include:

--Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

--Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

--Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

I Hope This Helps You!

Answer:

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Explanation:

edge.

Organic substances called aldehydes have the substituents -CHO. Carbonyl compounds have a core carbonyl carbon that is single and doubly bound to the R group, an oxygen, as well as a hydrogen atom.

The organic molecules with the carbon functional group are aldehydes and ketones. The carbonyl group, which is linked to at least 1 hydrogen atom, is present in aldehydes. A carbonyl group connected to two carbon is present in ketones.

Aldehydes are versatile substances that can be used to create resins, dyes, acids, as well as detergents, soaps, and scents for cologne. Formaldehyde is the aldehyde that is most widely generated industrially.

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Initially, the CO2 is in a solid phase at -80 degrees Celsius and 8.0 atm. If it is allowed to warm up to -25 degrees Celsius at 5.0 atm, several phase changes could occur. At these conditions, CO2 can exist in all three phases: solid, liquid, and gas.

The first possible path is that the solid CO2 remains solid. This is because, at 5.0 atm, the sublimation point of CO2 is around -78 degrees Celsius, which is lower than the final temperature of -25 degrees Celsius. Therefore, it is possible for the solid to remain unchanged. The second possible path is that the solid CO2 changes to a liquid. This is because the temperature is now above the triple point of CO2 (-56.6 degrees Celsius), and at 5.0 atm, the melting point of CO2 is around -56.4 degrees Celsius. Therefore, the solid could melt and become a liquid. The third possible path is that the solid CO2 sublimes directly to a gas. This can happen if the final temperature is above the sublimation point of CO2, which is -78 degrees Celsius at 5.0 atm.

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Answer:

Brownian moment means zig-Zag motion of particals Randomly anywhere in the free space or in fluids

In order to determine the maximum concentration of phosphate ions that urine can contain before a calculus begins to form, we need to know the molar mass of calcium phosphate. The molar mass of calcium phosphate is 310.18 g/mol.

To determine the maximum concentration of phosphate ions, we need to divide the normal mid-range calcium excretion rate (0.10 g/day) by the molar mass of calcium phosphate and the normal mid-range urine output (1.4 L/day).

Using the formula:

[PO4^3-] = (Ca2+ excretion rate (g/day)) / (molar mass of calcium phosphate (g/mol)) / (urine output (L/day))

[PO4^3-] = (0.10 g/day) / (310.18 g/mol) / (1.4 L/day)

[PO4^3-] = 3.53 x 10^-5 mol/L

To convert to millimoles per litre (mmol/L), we multiply the concentration in moles per litre by 1000:

[PO4^3-] = 3.53 x 10^-5 mol/L * 1000 mmol/mol

[PO4^3-] = 0.353 mmol/L

This is the maximum concentration of phosphate ions that urine can contain before a calculus begins to form.

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C. The theoretical yield of aspirin is found to be 4.2g

The largest amount of product that could be generated from the provided reactant amounts is termed as the theoretical yield. The quantity of product that actually formed during the reaction in a laboratory environment is known as the actual yield.

C₇H₆O₃ + C₄H₆O₃→ C₉H₈O₄ ( aspirin)

No of moles of  salicylic acid => 3.2/138.122 => 0.023 mol

no of moles of acetic anhydride => 1.08 g/mL x 6.3 mL / 102.089 g/mol

                                                        => 0.066mol

salicylic acid is limiting reagent

Theoretical yield calculated:

1 mole of salicylic acid=> 1 mole of aspirin

      Hence,  0.023  mol of aspirin formed in this reaction.

Theorectical yield of aspirin =>  0.023 mol x 180g/mol => 4.2g

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Answer: I’m pretty sure it’s lava.

Explanation: Because when a volcano erupts, hot melted molten rock comes out as lava.

Look it up.

While an element on the periodic table does not automatically qualify as a mineral, there are cases where a mineral can contain an element. In this context, it is important to consider the distinction between elements and minerals in geology. Elements are pure substances composed of atoms of the same type, while minerals are naturally occurring inorganic substances with a specific chemical composition and crystal structure.

In geology, minerals are defined as naturally occurring inorganic substances with a specific chemical composition and crystal structure. While elements themselves are not considered minerals, there are instances where minerals contain a single dominant element.

One such example is the mineral gold (Au), which consists entirely of the element gold. Gold meets the criteria of a mineral as it is naturally occurring, has a specific chemical composition (Au), and possesses a crystalline structure. Therefore, gold can be classified as both an element and a mineral.

It is essential to note that not all elements can be classified as minerals. For example, gases like oxygen (O2) or elements that exist in an amorphous state, such as liquid mercury (Hg), do not exhibit the necessary crystalline structure to be considered minerals.

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Answer:

A. teeth

Explanation:

It contains a protien called collagen, which absorbs chemical elements from the food that an individual eats, so scientists are able to obtain information about animals diet by studying the chemical elements found in fossilised teeth.

Answer:

Teeth

Explanation:

They can see the shape of the teeth and try to figure out what they ate