which of the following is a common way to measure past temperatures, when using tiny fossil shells as a proxy? oxygen isotopes carbon isotopes uranium isotopes radium isotopes

Answer:

\(MgO _{(s)} + 2H {}^{ + } _{(aq)} = Mg {}^{2 + } _{(aq)}+ H _{2} O _{(l)} \\ \)

The dissolution equation of the slightly soluble compound al(oh)3 if the solubility product expression is Ksp = [Al3+][OH–]3 will be:

Al(OH₃)\(_{(s)}\) ⇄ Al³⁺\(_{(aq)}\) + 3OH⁻\(_{(aq)}\)

A compound is created when two or more elements combine chemically in a specific mass ratio. Compounds are substances made up of two or more different types of elements in a specific proportion of their atoms. When the elements combine, some of their individual properties are lost and the newly formed compound has new properties.

Chemical formulas serve as a representation of compounds. A chemical formula is a symbolic representation of the atom compositions that make up a specific chemical compound. The chemical formula of water is H2O, which indicates that two hydrogen atoms and one oxygen atom have combined to form one molecule of H2O.

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When ions are tightly attached to solvent molecules they are called as solvated ions.

When separation occurs, the solute is divided into ions or molecules, and every ion or molecule is surrounded by a solvent. The bonding between the solute particles and solvent molecules is called solvation. A solvated ion or molecule is surrounded by solvent molecules. For example, when we add NaCl to water, the NaCl molecules split into Na⁺ and Cl⁻ ions. These ions of sodium and chlorine then get surrounded by water molecules. We can call the ion water mixture a solution and the surrounded ions of sodium and chlorine as solvated ions.

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Answer:

The total number of protons and neutrons in the nucleus of an atom is called mass number.

Answer:

mass number also called nucleon number and it's the total number of neutron and proton in an atomic nucleus.

The isoleucyl-tRNA synthetase is able to proofread the aminoacylation reaction because it has a specialized domain that recognizes and removes incorrectly added amino acids.

This domain is absent in the histidyl-tRNA synthetase, which lacks the ability to proofread the reaction. This is likely due to evolutionary adaptations in the two enzymes. The isoleucyl-tRNA synthetase, which is responsible for attaching isoleucine to tRNA molecules, is involved in the synthesis of proteins and therefore requires high fidelity in its reactions to ensure proper protein structure and function. On the other hand, histidine is a less critical amino acid in protein synthesis, and the histidyl-tRNA synthetase may have evolved to prioritize speed over accuracy. While this lack of proofreading may lead to occasional errors in protein synthesis, it is outweighed by the benefits of faster reaction times.

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Answer: If the oxidation number of copper changes from 0 to +2 then yes this is a redox reaction as copper lost 2 electrons and was oxidized.

Explanation:

When an element or atoms loses an electron then it acquires a positive charge.

This charge on an atom represents its oxidation state.

For example, \(2AgNO_{3}(aq) + Cu(s) \rightarrow Cu(NO_{3})_{2}(aq) + 2Ag(s)\)

Here, oxidation number of copper changes from 0 to +2.

A redox reaction in which electrons are removed from an atom or a reaction where an increase in oxidation number of an atom takes place is called oxidation-half reaction. The atom itself gets oxidized.

This means that here copper lost 2 electrons and was oxidized.

Thus, we can conclude that if the oxidation number of copper changes from 0 to +2 then yes this is a redox reaction as copper lost 2 electrons and was oxidized.

Green algae and land plants are closely related and share several common characteristics.

Both have chloroplasts, which are organelles that contain chlorophyll and are responsible for photosynthesis. They both have a cell wall, which provides structure and support to the cell. Both also have a nucleus, which contains the genetic material of the cell.

Additionally, both green algae and land plants have chlorophyll, which is a green pigment that is necessary for photosynthesis. The similarities between green algae and land plants suggest that land plants evolved from green algae, possibly through a series of adaptations that allowed them to survive on land. Overall, the relationship between green algae and land plants is an important area of study in biology, as it helps us understand the origins of life on Earth.

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Answer:

What?

Explanation:

Answer:

Are you trolling us?

Explanation:

Answer:

Oxygen or sulfur I believe since they fall in the same group.

Answer:

Oxygen is one of them.

1. The filter paper can get clogged when the pores of the paper get filled with precipitate

2. While the filter paper getting clogged is not necessarily a human error, it can be a result of poor technique or improper preparation

Uneven surfaces or gaps in the filter paper caused by improper folding or fitting can let ppt get through and pollute the filtrate. The mixture being filtered can have more tiny particles that can clog the paper if it is not properly prepared or given time to settle.

Overall, even though filter paper clogging is a common problem in filtration, using the right method and getting ready can help reduce the risk and guarantee accurate results.

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On the basis of data the best prediction of the pH pf water in which daphnia normally are found in wild is 7.

Water quality in daphnia habitats can vary widely. For most species, a pH between 6.5 and 9.5 is acceptable, with the optimum being between 7.2 and 8.5. Salinity should usually be less than 5% of seawater (about 1.5 grams of sea salt per liter), but some species can tolerate much higher salinities.

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\(\huge\textbf{Hey there!}\)

\(\huge\textbf{Better understanding of the lesson}\)

\(\text{Formula for finding the area of rectangular prism: \boxed{\mathsf{2(wl + hl + hw) = a}}}\\\text{Whereas, \bf l = \underline{length}, w = \underline{width}, h = \underline{height.}, and a = \underline{area}}\)

\(\huge\textbf{Now, let's solve for the given equation}\)

\(\mathsf{a = 2\times(8\times6 + 9\times6 + 9\times8)}\)

\(\mathsf{a = 2\times(48 + 54 + 72)}\)

\(\mathsf{a = 2(48) + 2(54) + 2(72)}\)

\(\mathsf{a = 96 + 108 + 144}\)

\(\mathsf{a = 204 + 144}\)

\(\mathsf{a = 348}\)

\(\huge\textbf{Therefore, your answer is: \boxed{\mathsf{348\ cm^2}}}\huge\checkmark\)

\(\huge\textbf{Good luck on your assignment \& enjoy}\\\huge\textbf{your day!}\)

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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The limiting reactant for the reaction, given that 20 g of Mg reacted with 20 g of oxygen is magnesium, Mg

First, we shall write the balanced equation for the raection. Details below:

aMg + bO₂ -> cMgO

2Mg + O₂ -> 2MgO

Finally, we shall obtain the limiting reactant. Details below:

2Mg + O₂ -> 2MgO

From the balanced equation above,

48.6 g of Mg reacted with 32 g of O₂

Therefore,

20 g of Mg will react with = (20 × 32) / 48.6 = 13.17 g of O₂

From the above, we can see that only 13.17 g of oxygen, O₂ out of 20 g  reacted with 20 g of magnesium, Mg

Thus, we can conclude that the limiting reactant is magnesium, Mg

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Answer: B

Explanation: They are both things that can give you hiccups.

The number of  microstates that are possible is 10.

The possible microstates of a system with two argon atoms in five slots can be calculated using the formula for the number of ways of arranging k objects in n slots.

This is given by the combination formula, n!/(k!(n-k)!).In this case, there are 2 argon atoms and 5 slots.

So, the number of possible microstates can be calculated as follows:5!/(2!(5-2)!) = 10

Possible microstates = 10A microstate refers to a specific arrangement of particles in a system that can exist in multiple forms depending on the energy of the system. In thermodynamics, microstates are used to calculate the entropy of a system.

The calculation above shows that a system with two argon atoms in five slots has 10 possible microstates.

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When (trans, trans)-hepta-3,5-dien-1-yne is reacted with Pd/C and H2, the product that is formed is (trans, trans)-hept-3-en-1-ol.

The reaction between the given compound and Pd/C and H2 undergoes catalytic hydrogenation or reduction. It is a type of chemical reaction in which an unsaturated bond present in a molecule is reduced by the addition of hydrogen gas (H2) with the help of a catalyst.

In this case, the given compound contains two triple bonds and no double bonds. So, it is known as diyne. When it is subjected to hydrogenation in the presence of a catalyst like Pd/C and H2, it undergoes hydrogenation and reduces its two triple bonds to double bonds. The two hydrogen atoms are added to each triple bond to form two single bonds.To write the balanced chemical equation for this reaction, we have:(trans, trans)-hepta-3,5-dien-1-yne + H2 (in presence of Pd/C) → (trans, trans)-hept-3-en-1-olHence, the final product formed when (trans, trans)-hepta-3,5-dien-1-yne is reacted with Pd/C and H2 is (trans, trans)-hept-3-en-1-ol.

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Answer:

o sou imleyna leqro mueuto ajdairv  c aegra vamos loámas...i o

Explanationaer pgunta t:á incoplmeta

Answer:

it willl have less dense and decreases the voloume of liquid .

Answer:

Stays the same maybe?

Explanation:

Changes in presure have very little effect on the volume of a liquid. Liquids are relatively incompressible because any increase in pressure can only slightly reduce the distance between the closely packed molecules. If the pressure above a liquid is increased sufficiently, the liquid forms a solid.

Answer:

A- SImilar to both copper and oxygen

Explanation:

If copper and oxygen react to form copper oxide, a compound of both Copper and Oxygen, they most likely have traits from both elements, therefore its A

To solve this, we must know each and every concept that is related to electrolytic solution. Therefore, In solution, an electrolyte produces ions. The correct option is option A.

In chemistry and physics, an electrolyte is a substance that conducts electric current by separating into positively and negatively charged particles known as ions, which migrate toward and are normally released at the negative and positive terminals.

Acids, bases, and salts are the most common electrolytes, which ionize when saturated in solvents such as water or alcohol. An electrolyte readily dissociates into ions in solution.

Therefore, in solution, an electrolyte produces ions. The correct option is option A.

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According to the data 0.855 moles Mg(OH)₂ has in 0.05 kg from substance.

Add the number of moles to the substance's molecular weight. The molecular weight of a substance determines how many grams there are in a mole and provides a conversion factor from moles to grams for that specific substance. 1 mol H2O x 18.02 g/mol = 18.02 g, or 18.02 grams, is the mass of one mole of water.

1 kg = 1000g

We can convert 0.05 kg to grams

0.05 * 1000 = 50 grams

Then Find moles of Mg(OH)₂

1 grams Mg(OH)₂ is equal to 0.0171 mole

Then 50 grams Mg(OH)₂ is :

50 * 0.0171 = 0.855 moles

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N2 + 3 H2 = 2 NH3

Reaction type: synthesis

Answer:

ammonia molecules. Similar factors may be derived for any pair of substances in any chemical equation. Example 4.8. Moles of Reactant Required in a Reaction.

Explanation:

A one molal solution is easier to prepare.

A one molal solution is easier to prepare than a one molar solution because it involves a smaller amount of solute. A one molar solution contains one mole of solute per liter of solution, while a one molal solution contains one mole of solute per kilogram of solvent. Since a kilogram of solvent is usually easier to measure than a liter of solution, it is easier to prepare a one molal solution. Additionally, the concentration of a one molal solution is dependent on the mass of solvent, which is more consistent and precise than the volume of solution.

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Answer:

for you to get smarter

Explanation:

Why teachers give lots of work:

They teach you new things you may not have known before

They teach you to think.

They teach you to be curious about things you didn’t know you wanted to know.

They try and teach you the reason you should love learning.

They teach you about different perspectives in our world.

They teach you how mistakes can be learned from.

They teach you how to take turns.

They teach you respect.

They teach you about the world - one that is outside your house, town, state, continent, and most of your mind.

They show you books you would never pick up on your own.

They teach you the how, who, what, why, where, and when.

They teach you the importance of communication.

They teach you how to get along with others - even those you don’t like.

They teach you to share.

They teach you patience.

They teach you compassion.

These are only a few things a good teacher will teach you. Some you will learn in a year and other things take several years and several teachers.

By neutralizing hydrochloric acid with sodium hydroxide, sodium chloride (NaCl) is produced.

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