Which is least likely to get reduced
URGENT

Cu2+

Zn2+

Fe3+

Fe2+

Answer:

hi

Explanation:

hi

Answer:

Well maybe the pedals they don't help much

Explanation:

Answer:

brainliest please

Explanation:

the pollen probably because other plants have it

In a neutral solution, most amino acids exist as zwitterions. Zwitterions are molecules that have both a positive and a negative charge, but the overall charge of the molecule is neutral.

This is because the positive and negative charges are balanced out. Amino acids contain both an amino group (-NH2) and a carboxyl group (-COOH), which can both donate and accept protons, allowing them to exist as zwitterions in a neutral solution.
In a neutral solution, most amino acids exist as:
B. zwitterions
A zwitterion is a molecule that has both positive and negative charges, but the overall charge is neutral. In a neutral solution, amino acids tend to ionize, forming zwitterions where the amino group is protonated (positively charged) and the carboxyl group is deprotonated (negatively charged). This is the most stable form of amino acids in a neutral solution.

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Answer:

Pic attached of structures

Explanation:

a) Propanal       (R-CHO; Carbonyl grp structure)

b) Dimethyl ether or methoxymethane     (R-O-R)

Answer:

Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.

Hope this helped.

The result of all of these scientific contributions except Rutherford's gold foil experiment proved the existence of the nucleus.

The valence electrons mainly determine the chemical houses of the elements. The elements inside the equal group have comparable chemical homes because they have identical valence shell electron configurations. The electrons in the power degrees with the highest range are in common the farthest from the nucleus.

Because variations in electrons placed inside the outermost stage distinguish an atom from its nearest noble fuel these are the electrons accountable for the atom's chemical conduct. Electrons located inside the outermost shell of the electron cloud are called valence electrons and feature the best power. Valence electrons determine the chemical homes of an element or how the valence electrons of 1 element are shared or traded with valence electrons of other elements to create new molecules.

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Answer:

The third one from the left–the graduated cylinder.

Explanation:

The laboratory apparatus that gives an "accurate" or "precise" measurement of a liquid's volume is the graduated cylinder. All you have to do is to pour the liquid into the cylinder and read its measurement using the calibrated scale.

The graduated cylinder comes in different sizes, which means the scale divisions will depend on its size. When reading the measurement, it is important to take note to read at the bottom of the meniscus because it gives the most accurate volume.

Answer:

graduated cylinder

Explanation:

Answer:

Look at the images/files below :) Hope it helps Have a great day!

Explanation:

Answer:

Its F S E F Hope this helped :D

Answer: 1/ms=8mk

Explanation:

Answer:

9 moles of O²

Explanation:

Hope this helped,

Philip

Brainliest always appreciated! <3

Answer:

Symbol: Sr2+

Element: Strontium

Explanation:

Strontium will have 38 protons, 38 electrons, and the neutron will depend on the isotope but there will usually be 48, 49, or 50 neutrons

Hope this Helps

The concentration of the unknown  \(H_{3} PO _{4}\) solution in the neutralization reaction is  4.11 × \(10^{-2}\) mol\(L^{- 1}\).

We are given the following neutralization reaction-

\(H_{3} PO _{4}\)( aq ) + 2 NaOH ( aq ) → \(Na_{2}HPO_{4}\) ( aq ) + 2 \(H_{2}O\)

Phosphoric acid is a diacid in an aqueous solution.

We have to find the concentration of the unknown  \(H_{3} PO _{4}\) solution in the given neutralization reaction.

Hence, the number of moles of NaOH = 26.28 × \(10^{-3}\) L × 0.100 mol  \(L^{- 1}\)

= 2.63 × \(10^{-3}\) mol

Thus, we have

the concentration \(H_{3} PO _{4}\) = 2.63 × \(10^{-3}\) mol × (1 /2) / 32.00 × \(10^{-3}\) L

                                           = 4.11 × \(10^{-2}\) mol\(L^{- 1}\).

Hence, the concentration of the unknown  \(H_{3} PO _{4}\) solution in the neutralization reaction is  4.11 × \(10^{-2}\) mol\(L^{- 1}\).

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Answer:

negative charge

Explanation:

An anion has more electrons than protons, consequently giving it a net negative charge.

hope this helps, pls mark brainliest :D

0.00003 in scientific notation would be 3 × 10⁻⁵.

The scientific notation of a number is represented as a coefficient multiplied by 10 raised to an appropriate exponent.  0.00003 can be expressed in scientific notation as \(3\times 10 ^{-5}\).

Scientific notation is a simple and standardised approach to express extremely big or extremely small numbers. Its foundation is the idea that a number can be expressed as a coefficient times a power of 10. The exponent indicates how many places the decimal point must be moved to get the original value, while the coefficient is normally an integer between 1 and 10 (inclusive of 1 but exclusive of 10). To write 0.00003 in scientific notation, we need to move the decimal point five places to the right to make the coefficient between 1 and 10. 0.00003 can be expressed in scientific notation as \(3\times 10 ^{-5}\).

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The hazardous substance in automobile exhaust that is also present in high concentration in tobacco smoke is acrolein.

Substance that tobacco smoke and the exhaust of automobiles contains a has it is substance called acrolein in very very high concentration.

Inhaling acrolein can give rise to several breathing problems like shortness in breathing and also irritation in lungs.

Acrolein is formed when the fats are overheated apart from automobiles and tobacco a very low amount of acrolein is also found in over used cooking oil.

To reduce acrolein from the automobile exhaust lead based adsorption substances are preferred to be used in automobile exhaust.

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The two ways in which humans have negatively affected groundwater are Fertilizers and pesticides.

Fertilizers were chemical substances that are applied to crops in order to boost their yield.

Pesticides are chemicals that are being used to keep pests at bay. Herbicides, insecticides, nematicides, and molluscicides are examples.

Fertilizers and pesticides applied to the land, manure from livestock as well as other animals, landfills, mining operations, even unintended releases such as chemical spills or storage tank leaks are all factors that affect groundwater quality.

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Answer:

the best answer would be A

Explanation:

cause it contains a red colored compound.

Answer:

the answer is pain relievers

Which is composed of aromatic hydrocarbons?

clothing

barbeque fuel

pain relievers

polyvinyl chloride

Pain relievers are composed of aromatic hydrocarbons. Therefore, option C is correct.

Hydrocarbons with delocalized pi electrons and sigma bonds between their carbon atoms are known as aromatic hydrocarbons. One example is benzene. Since they smell, they are said to as aromatic.

One aromatic ring makes up monocyclic aromatic hydrocarbons (MAHs). The well-known environmental contaminants benzene, toluene, ethylbenzene, and xylenes are among the most combustible and water-soluble aromatic hydrocarbons (BTEX).

The typical aromatic parent structure is benzene. When the benzene ring is a substituent, it is referred to as a phenyl group.

Thus, Pain relievers are make up of aromatic hydrocarbons, option C is correct.

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(a) The mass of 1 mole of aluminum atoms is 26.982 g.

(b) The number of moles of aluminum atoms that have a mass equal to the mass of a small airplane is 185,250 mol.

(a) To calculate the mass of 1 mole of aluminum atoms, we use the molar mass of aluminum, which is 26.982 g/mol (rounded to 3 significant digits). The mass of 1 mole of aluminum atoms is therefore:

1 mole of Al atoms x 26.982 g/mol = 26.982 g

(b) To find how many moles of aluminum atoms have a mass equal to the mass of a small airplane, we need to convert the mass of the airplane from kilograms to grams:

5000 kg x 1000 g/kg = 5,000,000 g

Next, we need to divide the mass of the airplane by the mass of 1 mole of aluminum atoms to get the number of moles of aluminum atoms:

number of moles = mass of airplane / molar mass of aluminum

5,000,000 g / 26.98 g/mol = 185,250 mol

Therefore, 185,250 moles of aluminum atoms have a mass equal to the mass of a small airplane.

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CORRECT QUESTION WOULD BE

An aluminum atom has a mass of 4.48 * 10^23 g and a small airplane has a mass of 5000 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits.

(a) What is the mass of 1 mole of aluminum atoms?

(b) How many moles of aluminum atoms have a mass equal to the mass of a small airplane?

Answer:

Explanation:

Metals in the top of the reactivity level i.e. metals like sodium, magnesium, calcium, etc cannot be obtained from their compound by heating with carbon as they are very reactive. Electrolytic reduction is used to obtain such metals.

Answer: the atomic is at the top the the element

Explanation: when you have an element like carbon you have the atomic number witch is on top then you have the atomic mass witch is the decimal and the bottom it could be a whole number or a decmial

Therefore, the compound that would form a precipitate is option D, NaOH.

A precipitate is a solid that forms from a chemical reaction between two or more liquids or solutions. This solid typically forms when two solutions are mixed together and a chemical reaction occurs that causes one of the products to become insoluble in the mixture, resulting in a solid that falls out of the solution and settles at the bottom. Precipitates can vary in size, shape, and color depending on the specific chemical reaction and the properties of the substances involved.

Here,

To determine which of the given compounds would form a precipitate, we need to know the solubility rules for common ionic compounds. Here are the rules for the given ions:

Li2CO3: carbonates are generally insoluble, but Li2CO3 is an exception and is soluble in water

AgBr: silver halides (AgCl, AgBr, AgI) are generally insoluble, so AgBr would form a precipitate

Cr(NO3)2: nitrates (NO3-) are generally soluble, so Cr(NO3)2 would dissolve in water and not form a precipitate

NaOH: hydroxides (OH-) of Group 1 and most Group 2 metals are soluble, but NaOH is an exception and is only slightly soluble, so it would form a precipitate

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Answer: the extent of dissociation of the acid or base

Explanation:

When an acid or base dissociates, it means that they go back to their original ions in order to be able to react with the atoms in the solution they dissociated in.

Stronger acids and bases are able to almost completely dissociate in a solution which is why they are able to react with the atoms in the solution very easily. The strength of an acid or base is therefore measured by how much dissociation they can manage in a solution.

Both these contain 18 elements each. The shortest period which contains two elements, while the longest period is the 6th period which contains 32 elements.

If four molecules of carbon dioxide enter the Calvin cycle (four "turns" of the cycle), eight G3P molecules are produced, and four G3P molecules are exported is d. 8 G3P made, 4 G3P exported.

The Calvin cycle is the collection of chemical reactions that occur in chloroplasts during photosynthesis. The Calvin cycle transforms CO2, using the energy from ATP and NADPH produced in the light reactions, into the sugar G3P. Three G3P molecules are created for every three CO2 molecules that enter the cycle. Every G3P molecule has three carbon atoms. If four molecules of CO2 enter the Calvin cycle (four "turns" of the cycle), eight G3P molecules are produced, and four G3P molecules are exported.

In the first step of the Calvin cycle, three CO2 molecules are combined with three RuBP molecules to form six 3-PGA molecules, which are then converted into six G3P molecules. However, five of the six G3P molecules must be recycled into RuBP so that the cycle can continue. As a result, only one G3P molecule out of the six created is exported from the cycle. So, every four CO2 molecules that enter the Calvin cycle create two G3P molecules that are exported out of the cycle.

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Answer:

Dont listen to that other dude, its some fake scam thing.

Explanation:

Its a chemical reaction between H2O and the chemicals in bath bombs.

so basically the bubbles come from the chemical reaction between the water and bath bomb,

hope this helps! :)

Answer:

13.18

Explanation:

We'll begin by calculating the hydrogen ion concentration, [H⁺] in the solution. This can be obtained as follow:

HCl (aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl dissociate to produce 1 mole of H⁺.

Therefore, 0.15 M HCl will also dissociate to produce 0.15 M H⁺.

Thus, the concentration of the hydrogen ion, [H⁺] in the solution is 0.15 M.

Next, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

Collect like terms

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

The pOH of the solution is 13.18 when a solution of 0.15 M HCl (aq) is present.

The potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution.

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

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