A rock is an (blank) of minerals.


I don't get this at all.

1 - causes the molecules of the object or surface it strikes to vibrate faster, increasing its temperature.

2-carbon dioxide, methane, nitrous oxide, and water vapor it has to be one of these 3

3-The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.”

4- because of the fossil fuels that people are burning for energy.

5- due to human activities

Answer:

Yea.....where is the article and the 6 questions?

Answer:

Answering

Explanation:

do u want us to tell u what we got?

First, we need to make the exponent of 10 the same for both.

So let's transform 6.5500 x 10^5 into some number x 10^3.

For this, we need to move the dot to the right, some places where it gives the number 3. In this case, 2 places.

655.00 x 10^3

now we can sum the numbers

8.6500 x 10^3 + 655.00 x 10^3 = 663.65 x 10^3

now we need to transform this number into scientific notation. For this, must have only one number before the dot(on the left side of the dot). We will move the dot to the left, 2 places:

6.6365 x 10^5

Answer: 6.6365 x 10^5

Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

After one day, approximately 8.67mg of the sample will be remaininga) The function that models the sample of Technetium-99 is given by

f(t) = P₀e^(-kt)

Where,P₀ = initial quantity = 100mgk = decay constantt = timef(t) = remaining quantity after t time.

A half-life of 6 hours is given. The decay constant can be found using the half-life formula:

T½ = (ln 2)/k6

= (ln 2)/kk

= (ln 2)/6f(t)

= P₀e^(-kt)f(t)

= 100e^(-0.1155t)mg

b) After one day, 24 hours = 4 half-lives Remaining amount,

f(t) = P₀e^(-kt)f(24)

= 100e^(-0.1155 × 24)

= 100e^(-2.772)

≈ 8.67mg

After one day, approximately 8.67mg of the sample will be remaining. The function that models the sample is

f(t) = 100e^(-0.1155t), where t is time in hours and f(t) is the remaining quantity in milligrams.

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After one day, approximately 8.67mg of the sample will be remaininga) The function that models the sample of Technetium-99 is given by

f(t) = P₀e^(-kt)

Where,P₀ = initial quantity = 100mgk = decay constantt = timef(t) = remaining quantity after t time.

A half-life of 6 hours is given. The decay constant can be found using the half-life formula:

T½ = (ln 2)/k6

= (ln 2)/kk

= (ln 2)/6f(t)

= P₀e^(-kt)f(t)

= 100e^(-0.1155t)mg

b) After one day, 24 hours = 4 half-lives Remaining amount,

f(t) = P₀e^(-kt)f(24)

= 100e^(-0.1155 × 24)

= 100e^(-2.772)

≈ 8.67mg

After one day, approximately 8.67mg of the sample will be remaining. The function that models the sample is

f(t) = 100e^(-0.1155t), where t is time in hours and f(t) is the remaining quantity in milligrams.

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1. 2Al(s)+6HCl(aq)⇒2AlCl₃(aq)+3H₂(g)

2. 2AgNO₃ (aq) + Cu (s)⇒Cu(NO₃)₂ (aq) + 2Ag (s)

3. 2C₃H₈O(l) + 9O₂(g) ⇒ 6CO₂(g) + 8H₂O(g)

There are several reactions that can occur in a chemical reaction: single replacement, double replacement, synthesis, decomposition or combustion, etc.

1.Al(s)+HCl(aq)⇒AlCl₃(aq)+H₂(g)

type : single replacement

balance :

2Al(s)+6HCl(aq)⇒2AlCl₃(aq)+3H₂(g)

2. AgNO₃ (aq) + Cu (s) ⇒ Cu(NO₃)₂ (aq) + Ag (s)

type : single replacement

balance :

2AgNO₃ (aq) + Cu (s)⇒Cu(NO₃)₂ (aq) + 2Ag (s)

3. C₃H₈O + O₂ ⇒ CO₂ + H₂O

type : combustion of alcohol

balance :

2C₃H₈O(l) + 9O₂(g) ⇒ 6CO₂(g) + 8H₂O(g)

The balanced chemical reaction is given as follows:

(NH₄)₃PO₄ (aq) + AI(NO₃)₃ (aq) → AIPO₄ (s) + 3NH₄NO₃ (aq)

A balanced chemical equation is one that has the same number of atoms of each type in the reaction on both the reactant and product sides. In a balanced chemical equation, both the mass and the change are equal.

The law of conservation of mass, which states that "the total mass of all the products of reaction in a chemical reaction equals the total mass of all the reactants," is satisfied by balancing chemical equations.

Thus, A solution of ammonium phosphate is mixed with a solution of aluminum nitrate. If aluminum phosphate is insoluble in water, its reaction is  (NH₄)₃PO₄ (aq) + AI(NO₃)₃ (aq) → AIPO₄ (s) + 3NH₄NO₃ (aq).

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Verify that the number of atoms of each element is equal on both sides of the equation and, if the equation contains ions, that the charges are balanced equation.

The number and type of each atom in balanced chemical equations are the same on both sides of the equation. The simplest whole number ratio must be used as the coefficients in a balanced equation. In chemical processes, mass is always preserved.

Each element must have the same number of atoms on the left as it has on the right. You must add integers to the left of one or more equations to balance an imbalanced equation.

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A reagent that could be used to precipitate mercury(II) ions from contaminated water is H2S.

The precipitation will be shown using a net ionic equation. To show the net ionic equation, we must first write the molecular equation as follows;

Hg^2+(aq) + H2S -----> HgS(s) + H^+(aq)

The total ionic equation is;

Hg^2+(aq) + 2H^+(aq) + S^-(aq) ------>HgS(s) + H^+(aq)

Eliminating the spectator ions, we arrive at the final net ionic equation;

Hg^2+(aq) + S^-(aq) ------>HgS(s)

So, H2S can be used as a reagent to remove Hg^2+ from contaminated water.

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Factors such as the lack of arable land and the scarcity of water make agriculture less productive in India.

India has a large area of degraded and infertile land, which limits the ability of farmers to produce crops. Soil degradation is caused by factors such as deforestation, overgrazing, and soil erosion.

India is facing an increasingly serious water shortage, which affects agriculture in many regions. Lack of access to water for irrigation is a major limiting factor for crop production.

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For filtering particles from a 180°F gas stream containing ammonia, a suitable fabric would be PTFE (Polytetrafluoroethylene). For the 250°F gas stream containing SO₂, a suitable fabric would be P84 (Polyimide).

When dealing with a 180°F gas stream containing ammonia, PTFE fabric is a good choice due to its excellent chemical resistance and high-temperature stability. PTFE is known for its nonstick properties and resistance to a wide range of chemicals, including ammonia. It can withstand high temperatures and is capable of filtering out particles effectively.

In the case of a 250°F gas stream containing SO₂, P84 fabric is a suitable option. P84, a polyimide-based fabric, exhibits excellent resistance to acids, alkalis, and organic solvents, making it suitable for environments containing SO₂. It has good thermal stability, allowing it to withstand the high temperatures of the gas stream. P84 fabric also has a high filtration efficiency and can effectively capture fine particles.

Both PTFE and P84 fabrics are commonly used in industrial filtration applications due to their chemical resistance, high-temperature stability, and efficient particle filtration capabilities. However, it's important to consider specific operating conditions, such as gas composition, temperature, and other factors, to ensure the chosen fabric is compatible and optimized for the intended application.

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The main answer to your question is that two major products are formed from this reaction. The first product is formed through a stepwise mechanism that involves the formation of an intermediate. The second expected product can be drawn by considering the possible rearrangements and products that can result from the reaction.

An explanation of the reaction and its products is that it involves a chemical reaction between two reactants.

The reaction proceeds through a series of steps that involve the formation of an intermediate.

The intermediate then undergoes a series of transformations that result in the formation of the first product.

The second expected product can be drawn by considering the possible rearrangements and products that can result from the reaction.

In summary, the reaction produces two major products, and the first product is formed through a stepwise mechanism that involves the formation of an intermediate. The second expected product can be drawn by considering the possible rearrangements and products that can result from the reaction.

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Answer: Lanthanoids

Explanation:

Espero que esos ejercicios y esas fórmulas te ayuden

The major product is 3-methyl-2-pentene and the minor product is 2-ethyl-1-butene.

The alkyl halide shown is 3-bromo-3-methyl pentane. We can see that it is a tertiary alkyl halide. The proportion of products formed during the reaction are determined by Markovnikov rule.

The two products of this reaction are; 3-methyl-2-pentene and 2-ethyl-1-butene. The major product is 3-methyl-2-pentene because it is formed from a more stable carbocation intermediate.  2-ethyl-1-butene is the minor product.

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The compound that would form a precipitate in water is  BaSO4.

option d.

BaSO4 (barium sulfate) would form a precipitate in water because it is classified as an insoluble compound according to most solubility charts. When a compound is considered insoluble, it means that it has a very low solubility in water, resulting in the formation of solid particles or precipitate when dissolved in water.

In the case of BaSO4, it does not readily dissociate into ions in water and remains as solid particles, causing it to precipitate.

On the other hand, a. KCI (potassium chloride), b. NaOH (sodium hydroxide), and c. (NH4)2S (ammonium sulfide) are soluble compounds in water. They dissociate into ions and form homogenous solutions when dissolved in water, without forming a precipitate.

It's worth noting that solubility can vary depending on factors such as temperature and concentration, so it's always important to consult a solubility chart or reference for accurate and up-to-date information on specific compounds.option d.

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One percent  of a human's DNA is used for coding Information for the synthesis of proteins.

DNA  is a hereditary material which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus  and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule  and a phosphate group. A base, phosphate  sugar are together called as nucleotides.

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Your question is incomplete, but most probably your full question was,approximately what percentage of a human's DNA is used for coding Information for the synthesis of proteins?

5%

25%

99%

95%

1%

Answer:

Liquid; melting.

Explanation:

So what is being shown is a phase change diagram. Because we start at an atm of 1.5 (staying steady means that it doesn't drop so we always stay at 1.5 atm) and at a temperature of -150, the original state of matter is a solid. Next, we look at what happens when the temperature goes to 300 degrees, yet still maintaining the 1.5 atm. This means that it now turns into a liquid (based on placement on diagram). This means the matter after the temperature change was a liquid. And going from solid to liquid would be called melting.

Here's an example phase diagram so that you can rely on it in the future problems!

The secondary structure of a protein is responsible for the folding of a single polypeptide chain into beta sheets and/or alpha helices.

Protein structure is organized into different levels: primary, secondary, tertiary, and quaternary structure. The secondary structure refers to the local folding patterns within a single polypeptide chain. It is primarily determined by hydrogen bonding between the peptide backbone atoms.

The folding of a polypeptide chain into beta sheets and alpha helices is characteristic of the secondary structure. Beta sheets are formed by hydrogen bonding between adjacent segments of the polypeptide chain, creating a sheet-like structure. Alpha helices, on the other hand, involve a coiled conformation with hydrogen bonding between amino acid residues along the chain.

These secondary structures are stabilized by hydrogen bonds, which form between the carbonyl oxygen and amide hydrogen of different amino acids within the polypeptide chain. The specific sequence and arrangement of amino acids determine the formation of beta sheets and alpha helices, contributing to the overall three-dimensional structure and function of the protein.

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i'm not sure, so sorryyy!

The grams of na3po4 will be needed to produce 375 ml of a solution 14.35 g.

Calculation:-

Given that the concentration of Na+ is = 0.700M

Na3PO4 → 3Na+ + PO4 3-

1 mole of Na3PO4 produces 3 moles of Na+

So the concentration of Na3PO4 is M = 0.700 / 3 = 0.2333 M

Volume of solution is , V = 375 mL = 0.375 L

So no . of moles , n = Molarity * Volume in L

= 0.233M * 0.375 L

= 0.0875 mol

Molar mass of Na3PO4 is = (3*23)+ 31 + (4*16) = 164 g / mol

We know that no . of moles, n = mass / Molar mass

mass of Na3PO4 is, m = n * Molar mass

= 0.0875 mol * 164 g / mol

= 14.35 g

The highest Na+ concentration is found in the filtrate at the bottom of the loop. The highest concentration of sodium ions is at the bottom of the loop because the sodium ion concentration increases as you go down the loop. The concentration of sodium ions is lower inside the cell than in the extracellular fluid, and vice versa for potassium ions. Divide the mass of the solute by the total volume of the solution. Write down the formula C = m/V. where m is the mass of the solute and V is the total volume of the solution.

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Answer:

a) Density

Explanation:

Answer:

Catalase

Explanation:

These reactive oxygen specie or free radicals that cause damage or injury to cells also lead to oxidative stress if unchecked by antioxidants. As suggested in the question, there are several enzymes that act as antioxidants in mitigating the effects of these reactive oxygen specie or free radicals. These enzymes include catalase, superoxide dismutase and glutathiones (such as glutathione s-transferase).

The enzyme that however prevents the accumulation of hydrogen peroxide (H₂O₂) in the peroxisome is catalase. Catalase is an enzyme that is present in the peroxisome; it (catalase) detoxifies/acts on H₂O₂, converting it (H₂O₂) into water and oxygen.

The answer you're looking for is: 237.15

The correct answer is A. The pH is 4. Lemon juice has a hydrogen ion concentration of 1 × 10², which means it has a high concentration of hydrogen ions.

The pH scale is a measure of the acidity or alkalinity of a solution. It is determined by the concentration of hydrogen ions (H⁺) present in the solution. The pH scale ranges from 0 to 14, where values below 7 indicate acidity, 7 represent neutrality, and values above 7 indicate alkalinity.
In this case, the lemon juice has a hydrogen ion concentration of 1 × 10², which means it has a high concentration of hydrogen ions. When we convert this value to pH, it will be equal to 4. The pH scale is logarithmic, which means that a change of one unit represents a tenfold change in the concentration of hydrogen ions. Therefore, a pH of 4 indicates that the lemon juice is acidic.
Options B, C, D, and E are incorrect. Lemon juice with a pH of 4 does not necessarily have more hydrogen ions than a substance with a different pH (option B). It is not a base (option C) because it has a low pH indicating acidity.
It does not have more hydroxide ions [OH⁻] than hydrogen ions [H⁺] (option D) as it is an acidic solution. The pOH is not 10 (option E) since pOH is related to the concentration of hydroxide ions [OH⁻], not hydrogen ions [H⁺].

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Standard ensures that eyewear protects against  impact of shrapnel splashes of organic solvents .

Protective eyewear can be sen as one of the protective tools that is been required in the labortory especially when carry out a chemic reaction.

It shoud be noed that this is eeded to be worn in all laboratory spaces where physical, biological, as well as the chemical hazards are present  so as ro reduce the act and  chance of an eye injury, it should be noted tha the Eye injuries in laboratory spaces  is very common due toserious eye damage.

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Answer:

Explanation:

Without knowing the specific details of the lab, it is difficult to say for certain which question could be reasonably answered. However, based on the information given, it is possible that the question "what is the solubility of iron (ii) oxalate in water?" could be reasonably answered by performing this week's lab, as the solubility of a substance can often be determined experimentally by measuring the amount that dissolves in a given solvent under certain conditions. The other questions may require different experiments or techniques to answer.