Help please will give brainliest

Answer:

The molecule with two carbon atoms double-bonded to each other and single-bonded to four hydrogen atoms (C2H4). This molecule represents an organic compound because it contains carbon atoms covalently bonded to hydrogen atoms. Organic compounds are characterized by their ability to form covalent bonds with hydrogen atoms and other organic functional groups (such as carbon-carbon double bonds in this case). The other molecules mentioned in the question either have inorganic elements (O, S, N) or do not have any carbon-hydrogen bonds, making them inorganic in nature.

The compound represented by two Carbon atoms double-bonded and single-bonded to Hydrogen is an organic compound. Organic compounds are commonly formed of Carbon bonded to Hydrogen and possibly other elements.

The structure that represents an organic compound is the one with two Carbon (C) atoms double-bonded together, and single bonded above left, above right, below left, and below right to Hydrogen (H). This is because organic compounds are typically composed of Carbon atoms covalently bonded to Hydrogen, and possibly other elements. The other examples described include Oxygen (O) bonded to Hydrogen, which is a compound (water) but not an organic one; Sulfur (S) double bonded to Oxygen and single bonded to two other Oxygen atoms and a Hydrogen atom, likely forming a sulfate ion (not an organic compound); and Nitrogen triple-bonded to Nitrogen which forms N2 (a molecule but not an organic compound).

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B is the answer to your question.

C2H4 is not capable of hydrogen bonding because the H's are attached to the Carbon, and the charge is 0.

Although HCl cannot hydrogen bond, that aspect does not hinder it's ability to dissolve. Because HCl is polar and so is water, the positive side of H2O will be attracted to the negative side of HCl, thus "tearing" the molecule apart. (Like dissolves like - polar dissolves polar)

Based on the Solubility rule, KBr is soluble because it contains a group 1 metal.

1. Using your knowledge of the Brønsted-Lowry theory of acids and bases, complete the following acid-base reactions and indicate each conjugate acid-base pair.

i. OH + HPO₂ → H₂O + H₂PO₄²⁻

The conjugate acid-base pair is OH/H₂O, HPO₂²⁻/H₂PO₄²⁻

2) Identify the conjugate acid-base pairs in the following reactions. Write A, B, CA, and CB below the appropriate substance.

i. HCO₃⁻ + NH₃ → NH₄⁺ + CO₃²⁻

The conjugate acid-base pair is HCO₃⁻/CO₃²⁻, NH₃/NH₄⁺

ii. HCI + H₂O → H₃O⁺ + Cl⁻

The conjugate acid-base pair is H₂O/OH⁻, HCI/Cl⁻, H₃O⁺/H₂O, Cl⁻/HCI

iii. CH₃COOH + H₂O → H₃O⁺ + CH₃COO⁻

The conjugate acid-base pair is CH₃COOH/CH₃COO⁻, H₂O/OH⁻, H₃O⁺/H₂O

iv. HOCI + NH₃ → NH₄⁺ + ClO⁻

The conjugate acid-base pair is HOCI/ClO⁻, NH₃/NH₄⁺

3. Write the formula for conjugate bases formed by the following acids.

i. HPO₄²⁻ → PO₄³⁻

ii. H₂O → OH⁻

iii. CN⁻ → HCN

iv. HOOC-COO⁻ → HOOCCOOH

4) Write the formula for conjugate acids formed by each of the following bases.

i. H₃O⁺ → H₂O

ii. HCN → H₂CN⁺

iii. NH₃ → NH₄⁺

5. Classify each of the following pH values as acidic, basic, or neutral.

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Answer:5.3 grams AgNO3

Explanation:

To solve your problem, take a look at the definition of molality (m):

moles of solute/kg of solvent

You are given the grams of solvent (water) to find the grams of silver nitrate.

First, convert 250 grams to kg:

250 g * 1 kg / 1000g = 0.250 kg

Now that you have the kg of solvent, you can solve for the moles of solute:

kg of solvent * molality = moles of solute

0.250 kg * 0.125 m = 0.03125 mol AgNO3

You can convert the number of moles to grams using the molar mass of AgNO3, which is 169.872 g/mol:

moles of solute * molar mass of solute = grams of solute

0.03125 mol AgNO3 * 169.872 g/mol = 5.3085 g

Because your question provides two significant digits, you must round this number to get the final answer:

5.3 grams AgNO3

I hope this helps!

Answer: Nuclear fusion- The simple answer is that deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time.

The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Answer

144.564 grams

Exlanation

The given moles of MgO = 3.500 moles

The mass in grams of MgO can be calculated using the mole formula.

From the periodic table, the atomic masses of (O = 15.999, Mg = 24.305)

Molar mass of MgO = (24.305 + 15.999) = 40.304 g/mol

Putting mole = 3.500 mol and molar mass = 40.304 g/mol into the mole formulag/mol

Therefore, the grams of magnesium oxide (MgO) that are in 3.500 moles of magnesium oxide = P144.564 grams

Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

Answer: Where is the folowing?

Explanation:

Explanation:

Because of this, DNA and RNA can easily dissolve in water. ... Adding ethanol helps the Na+ and PO3- ions come together, because ions travel easier in ethanol than water. The supernate is removed and new ethanol is added in the second washing. This removes any residual salt that remained on the pelleted DNA.

Answer:

DNA is polar due to its highly charged phosphate backbone. Its polarity makes it water-soluble (water is polar) according to the principle "like dissolves like". ... This fact makes water a very good solvent for charged compounds like salts.

Your DNA's sugar phosphate backbone is charged. By adding salt, we help neutralize the DNA charge and make the molecule less hydrophilic, meaning it becomes less soluble in water. The salt also helps to remove proteins that are bound to the DNA and to keep the proteins dissolved in the water.

It is well known that Ethanol has a lower dielectric constant than water, making it to promote ionic bond formations between the Na+ (from the salt) and the PO3- (from the DNA backbone), further, causing the DNA to precipitate.

Explanation:

Ideally DNA needs to be precipitated with pellet and should not remain in supernatant. DNA is acidic in nature and therefore, needs optimum salt concentration in the buffer to be pelleted from a solution. At very low salt concentration or without salt DNA would remain in supernatant.

Answer:

the awnser is d the other fuel produce more pollutants

Explanation:

because right out the bat we know that other  fuels produce more than a 15 percent fuel so the right awnser is d

Answer:

the reason why Mars is red is because of its regolith, or surface material, contains lots of iron oxide — the same compound that gives blood and rust their hue

According to reaction

Mols of H_2O

\(\\ \tt\rightarrowtail 4.35(0.6)\)

\(\\ \tt\rightarrowtail 2.61mol\)

According to law of conservation of mass, 4.35 moles of water are produced when 2.80 moles of hydrogen  and 1.55 moles of oxygen react.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.As 2.80 moles of hydrogen react with 1.55 moles of oxygen 2.80+1.55=4.35 moles of water are produced.

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Answer:

The correct option is a: Hg-183.

Explanation:

The alpha decay is given by:

\(^{A}_{Z}X \rightarrow ^{A-4}_{Z-2}Y + ^{4}_{2}He\)

Hence, if Polonium-191 decays by emitting an alpha particle we have:

\(^{191}_{84}Po \rightarrow ^{187}_{82}Pb + ^{4}_{2}He\)        

Now, if Pb-187 also decays by emitting an alpha particle we have:

\(^{187}_{82}Pb \rightarrow ^{183}_{80}Hg + ^{4}_{2}He\)        

Therefore, the correct option is a: Hg-183.

I hope it helps you!

The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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Answer:

hey are the results of many experiments over a long period of time.

Explanation:

Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food. The correct option is option B,D.

Filter feeders are a subclass of animals that eat by sifting food particles and suspended materials from water, often by running the water through a specially designed filtering apparatus. Baleen whales, clams, krill, sponges, various fish (including some sharks), and krill are just a few species that adopt this technique of eating. Paramecia sweep food into mouthlike openings and a pine tree carriers out photosynthesis. These describe a way that an other-feeder gets food.

Therefore, the correct option is option B,D.

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Photosynthesis is the process by which plants use energy from the sun to convert carbon dioxide and water into glucose and oxygen. The equation for photosynthesis is,

6CO₂ + 6H₂O + light energy --> C₆H₁₂O₆ + 6O₂

This process occurs in the chloroplasts of the plant, using light energy to split water molecules into oxygen and hydrogen. The oxygen is released into the atmosphere while the hydrogen combines with carbon dioxide to form glucose. This glucose is then converted into other compounds, such as cellulose, which the plant uses for energy.

The equation of photosynthesis shows how plants use carbon dioxide and water, combined with light energy from the sun, to produce glucose and oxygen. This process is crucial for life on Earth, as it is the primary way that plants and other photosynthetic organisms convert carbon dioxide into oxygen.

The process of photosynthesis is closely related to the carbon cycle, as it helps to keep the levels of CO₂ in the atmosphere balanced. Photosynthesis removes carbon from the atmosphere and stores it in the form of organic compounds, such as glucose.

As plants use glucose for energy, they release some of this carbon back into the atmosphere in the form of CO₂. This process helps to maintain a steady balance of CO₂ in the atmosphere, which is crucial for life on Earth.

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Explanation:

1. Chart shows the annual state spending in percentages, like on things to benefit both them and the public.

2. Estimate that the total is 50,000 spent. Multiply that by 0.07 for the 7% spent on highways. You get 3,500 total.

3. Add the total from the previous problem with the budget of 50,000 multiplied by 0.14 to find 14% of the entire budget. You have 3,500 for 7%, and 7000 for 14%. Add them together to get a total of 10,500.

4. A. They spend the most on other, a whopping 45%.

B. The chart shows the total percentages of the amount spent.

5. No. The graph has nothing to do with age.

Answer:

Your answer would be a buffer, they control pH levels.

Explanation:

Buffer is a substance that reacts with an acid or a base to control pH. Hence, option A is correct.

pH is a measure of how acidic/basic water is.

Buffers are solutions that resist a change in pH after adding an acid or a base. Buffers contain a weak acid (HA) and its conjugate weak base (A−).

Hence, option A is correct.

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Explanation:

2,4-DNP is negative: aldehyde and ketone absent

Chromic acid is negative: alcohol absent.

KMnO4 test negative: alkene absent

The only positive result is for Fe(OH)2.

Nitro group-containing compounds react with ferrous hydroxide to give amine and ferric hydroxide red ppt. Hence given compound contains the nitro group (-NO2).

125 grams of zinc was reacted, therefore, 125 grams of zinc will produce 42.6 liters of hydrogen gas at STP, and the problem involves stoichiometry, which is the calculation of reactants and products in a chemical reaction.

The balanced chemical equation for the reaction of zinc and hydrochloric acid is:

Zn + 2HCl → ZnCl₂ + H₂

From the equation,

125 g Zn x (1 mole Zn/65.38 g) = 1.91 moles Zn

So, one can expect 1.91 moles of hydrogen gas to be produced.

Now, at STP (standard temperature and pressure), the volume of one mole of gas is 22.4 liters. Therefore, the volume of hydrogen gas produced at STP can be calculated as:

1.91 moles H2 x 22.4 L/mole = 42.6 L H2

Therefore, 125 grams of zinc will produce 42.6 liters of hydrogen gas at STP.

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Answer:

that the poem needs to be finished heh pog

Explanation:

Answer:

Where is the poem?

Explanation:

Answer:

Maybe D? B?

Explanation:

Sorry if I made u get it wrong