Write your own paragraph to reflect over the current situation of coral reefs and how these events can affect ocean health.
(If you intend to use any information from a source which you consider is of importance or can enrich or support your ideas you can use references or use citations- remember plagiarism is not acceptable)

Answer:

C) lattice of neutral atoms with delocalised electrons

Explanation:

Fact 1: metals are elements and therefore they contain atoms that are electrically neutral

Fact 2: in all atoms, the electrons are delocalised/ are free moving electrons (as the electrons serve their purpose in different forms depending whether you look at it the chemistry way or physics way)

metals are solid and hence they have a lattice structure

(tho at my school we focus on giant ionic lattice structure when explaining based on ionic compounds so i can't guarantee that 'giant ionic lattice structure' and 'lattice structure' are the same, hence i just stick with lattice structure for this explanation ^^)

explanation for other options:

they said negative/positive ions which is not true since atoms are electrically neutral

only when the atoms undergo chemical reactions will they be charged

Answer: equal to

Explanation:

The best metal to use for coating iron to prevent it from rusting is zinc. It also forms a protective oxide layer on its surface, which provides an additional barrier against rusting.

Zinc is a very reactive metal and can form an oxide layer on the surface of iron when exposed to the air, which acts as a barrier that prevents oxygen and moisture from reaching the iron and causing corrosion. This oxide layer is very thin and very hard, making it an excellent protective coating. Zinc is also relatively inexpensive compared to other metals, making it an attractive choice for protecting iron from rusting. Zinc has a higher electronegativity than iron, which means that it will be more likely to attract oxygen and water molecules away from the iron surface, thus preventing corrosion.

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Answer: Do understand building blocks of life, develop medicines, and so on.

Answer:

Chemistry is essential for meeting our basic needs of food, clothing, shelter, health, energy, and clean air, water, and soil.

Explanation:

Answer:

the answer is c

Explanation:

A carboxylic acid is an organic compound that contains the carboxyl functional group.

Rh Factor determines whether an individual will be blood type positive or negative. The presence of the Rh factor means that you will have a positive blood type while not having it means that your blood type will be negative.

Since dextrose cannot be autoclaved and IV administration makes sterility essential, even if the solution may be chemically stable for months, the shorter BUD that will be utilized is 14 days according on USP sterility requirements.

A basic sugar, glucose has the chemical formula C6H12O6. The most prevalent monosaccharide, a type of carbohydrate, is glucose.

(Dextrose dextrorotary glucose), a monosaccharide made from corn, is frequently referred to as "corn sugar" in commerce. It is additionally called glucose. A very refined white sugar, corn sugar has no corn (maize) flavor. Hexose-type sugar glucose contains a group of six carbon atoms.

A simple sugar derived from corn or wheat with the term dextrose is chemically equivalent to glucose, or blood sugar. Dextrose is a typical sweetener used in baked products and is present in things like processed foods and corn syrup.

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The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g

From the question given, the following data were obtained:

The mass of oxygen gas produced from the reaction can be obtained as follow:

Mass of potassium permanganate = Mass of remaining substance + mass of oxygen

Inputting the given parameters, we have:

15.8 = 14.2 + mass of oxygen

Collect like terms,

Mass of oxygen = 15.8 - 14.2

= 1.6 g

Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g

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Answer:

Metamorphic, I think

Explanation:

Its Metamorphic because that is changed by heat and pressure

To produce 35.5g of H2, approximately 2055.49g of NaCl is required.

To calculate the mass of NaCl required to produce 35.5g of H2, we need to determine the stoichiometry of the reaction and use the molar mass of NaCl.

The balanced equation for the reaction is:

2NaCl + 2H2O -> 2NaOH + H2

From the balanced equation, we can see that for every 2 moles of NaCl, 1 mole of H2 is produced. We can use the molar mass of H2 (2.016g/mol) to convert the given mass of H2 into moles:

moles of H2 = mass of H2 / molar mass of H2

moles of H2 = 35.5g / 2.016g/mol

moles of H2 = 17.6 mol

Since the stoichiometry of the reaction is 2 moles of NaCl to 1 mole of H2, we can set up the following ratio:

moles of NaCl / moles of H2 = 2 / 1

Rearranging the equation to solve for moles of NaCl:

moles of NaCl = (moles of H2 * 2) / 1

moles of NaCl = (17.6 mol * 2) / 1

moles of NaCl = 35.2 mol

Now, we can calculate the mass of NaCl required using the molar mass of NaCl (58.44g/mol):

mass of NaCl = moles of NaCl * molar mass of NaCl

mass of NaCl = 35.2 mol * 58.44g/mol

mass of NaCl = 2055.49g

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Answer:

True,When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction.

Answer:

S

Explanation:

The symbol for entropy is S, and a change in entropy is shown as “delta” S or ΔS. If the entropy of a system increases, ΔS is positive. If the entropy of a system decreases, ΔS is negative.

0.114 mol of \(H_2SO_4\) need to react with all of this KOH

Balance Equation:

\(2 KOH ( aq ) + H 2 SO 4 ( aq ) \rightarrow K_2 SO_4 ( aq ) + 2 H_2 O ( l ) .\)

from the Equation we know that 2 mol of KOH react with 1 mole of sulphuritic acid.

so

moles of h2so4 = Moles of KOH/ 2

=0.228/2 = 0.114 moles

0.114 mol of \(H_2SO_4\) need to react.

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The alkaline permanent waves have a pH between 9.0 to 9.6.

Alkaline permanent waves are chemical that is apply to the hair. The alkaline perm makes the hair curly or wavy.

The major ingredient is the ammonium thioglycolate and ammonium hydroxide.

The alkaline permanent wave is alkaline in nature and the pH scale for alkaline substances are higher.

pH of 7 depicts neutrality while pH of 7 and above depicts alkalinity.

Therefore, alkaline permanent waves have a pH between 9.0 to 9.6.

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Answer:

because it could be harmful and dangerous for our health. like some substances can be acid so if we taste it we can die.

Explanation:

Answer:

Explanation:

There are several reasons why we should not taste unknown substances:

Health risks: The unknown substance may be toxic or harmful to our health, and tasting it can lead to serious health issues or even death.

Allergic reactions: We may be allergic to some substances, and tasting them can cause severe allergic reactions.

Unpleasant taste: The substance may have a terrible taste, and tasting it can cause discomfort or nausea.

Contamination: The unknown substance may be contaminated, and tasting it can lead to the spread of harmful bacteria or viruses.

Legal issues: Tasting unknown substances can be illegal in some cases, such as trying drugs or other illegal substances.

In conclusion, it is always advisable to avoid tasting unknown substances. If you come across something you are unsure about, it is best to seek professional help or advice rather than risking your health or safety.

The carboxylic acid group is converted to a(n)  ester  functional group when it undergoes a dehydration reaction with glycerol.

What is dehydration reaction ?

When two chemicals interact chemically, a dehydration reaction occurs and one of the results is water. For instance, two monomers may react, resulting in the formation of a dimer and a water molecule when a hydrogen (H) from one monomer links to a hydroxyl group (OH) from the other monomer (H2O). Being a poor leaving group, the hydroxyl group can be protonated to generate -OH2+ with the aid of Bronsted acid catalysts. Hydrolysis or a hydration process is the term used to describe the opposite reaction, where water joins with hydroxyl groups.

Concentrated sulfuric acid, concentrated phosphoric acid, hot ceramic, and hot aluminum oxide are some of the chemicals that are frequently used as drying agents.

Dehydration synthesis and dehydration reactions are interchangeable terms.

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The carboxylic acid group is converted to an ester  functional group when it undergoes a dehydration reaction with glycerol.

Hence the carboxylic acid group is converted to an ester function group when it undergoes a dehydration reaction with glycerol

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Answer:

When a body covers equal distances in a straight line, equal intervals of time are called uniform motion

When a body covers unequal distance in equal intervals of time in a straight line is called non-uniform

Answer:

Uniform motion- is motion in which the

velocity does not change.

Non-uniform motion-occurs when the velocity of an object is not

constant : the object speeds up or slows down during its motion, or changes direction.

Hope it will help you !!

The percent yield for the production of nitrogen dioxide can be calculated using the formula: Percent yield = (actual yield / theoretical yield) x 100. In this case, the actual yield is given as 1,500 kg of nitrogen dioxide per day, and the theoretical yield can be determined based on the stoichiometry of the reaction.

From the balanced equation, we can see that the stoichiometric ratio between nitrogen oxide (NO) and nitrogen dioxide (NO2) is 2:2. Therefore, for every 2 moles of nitrogen oxide consumed, 2 moles of nitrogen dioxide are produced.

To calculate the theoretical yield, we need to convert the given mass of nitrogen oxide to moles. The molar mass of nitrogen oxide (NO) is 30 g/mol, so 1,500 kg is equal to 50,000 moles. Since the stoichiometric ratio is 2:2, the theoretical yield of nitrogen dioxide is also 50,000 moles.

Now we can calculate the percent yield:

Percent yield = (1,500 kg / 50,000 moles) x 100 = 3%

Therefore, the percent yield for the production of nitrogen dioxide is 3%. None of the given answer options match this result, so it seems there might be an error in the provided choices.

The given chemical equation represents the combustion of nitrogen oxide to produce nitrogen dioxide. According to the stoichiometry of the reaction, 2 moles of nitrogen oxide react with 1 mole of oxygen gas (O2) to produce 2 moles of nitrogen dioxide (NO2).

In the plant, it is stated that 1,500 kg of nitrogen oxide is consumed per day to produce an equal amount (1,500 kg) of nitrogen dioxide per day. To determine the percent yield, we need to compare the actual yield (1,500 kg) to the theoretical yield.

To calculate the theoretical yield, we need to convert the given mass of nitrogen oxide to moles. The molar mass of nitrogen oxide is calculated to be 30 g/mol. By dividing the mass of nitrogen oxide (1,500 kg) by its molar mass (30 g/mol), we find that there are 50,000 moles of nitrogen oxide consumed.

Since the stoichiometry of the reaction tells us that the ratio between nitrogen oxide and nitrogen dioxide is 2:2, the theoretical yield of nitrogen dioxide is also 50,000 moles.

Finally, we can calculate the percent yield using the formula: Percent yield = (actual yield / theoretical yield) x 100. Substituting the values, we get (1,500 kg / 50,000 moles) x 100 = 3%.

Therefore, the percent yield for the production of nitrogen dioxide in the given plant is 3%, which does not match any of the provided answer options.

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MgO contains metal and non metal. Binary Ionic Compounds Containing a Metal and a Nonmetal.

Electrical wires, cooking utensils, and other items are made of copper. Typically, zinc is used to coat iron to protect it. Manufacturing of electrical wires, packaging, kitchenware, and other items uses aluminium. Non-metals For example, welding torches and the manufacture of ammonia and methyl alcohol both utilise hydrogen.

Binary compounds are chemical mixtures made up of two unique components. An element is a substance that, when broken down chemically, cannot be further broken down into any simpler compounds. Magnesium oxide, calcium chloride, and sodium fluoride are all chemical elements.

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Answer:

Yes, because the number of proton are the same in both atoms

Explanation:

If an atom has only one proton in its nucleus, we can identify it as Hydrogen (H). "Another atom has one proton and one neutron in its nucleus" -- this describes Deuterium, which is Hydrogen's isotope, this means that Deuterium has the same atomic number/amount of proton in its nucleus (1) as Hydrogen, with a different amount of neutron. Recall that the no. of proton determines an atom's identity.

Deuterium is still Hydrogen because it still only has one proton in its nucleus, regardless of the no. of neutron. This makes them the same element.

Here are some general steps you can follow to write a lab report:

Understand the purpose of the lab report: Before you begin writing, make sure you understand the purpose of the lab report. What are the objectives of the experiment? What are the research questions being investigated? What hypothesis is being tested?

Gather your data: Make sure you have all the data you need to write your report. This includes raw data, observations, and any notes you took during the experiment. Organize your data in a clear and logical manner so that you can easily refer to it when writing your report.

Write an outline: Create an outline for your report that includes the main sections you need to cover. These typically include an introduction, methods, results, discussion, and conclusion.

Write the introduction: The introduction should provide an overview of the experiment and explain its significance. You should also provide some background information to help the reader understand the context of the experiment.

Write the methods: In the methods section, describe the experimental design, materials used, and procedures followed. Be sure to include enough detail so that someone else could repeat the experiment.

Write the results: In the results section, present your data in a clear and organized manner. Use tables, graphs, and figures to help illustrate your findings. Make sure to include any statistical analyses you performed.

Write the discussion: In the discussion section, interpret your results and explain what they mean. Discuss any patterns or trends you observed and explain how they relate to the research question. Compare your results to previous research in the field, and discuss any limitations or potential sources of error.

Write the conclusion: The conclusion should summarize the main findings of the experiment and explain their significance. You should also discuss any future directions for research in the field.

Proofread and revise: Once you have completed your first draft, proofread your report carefully to check for errors and inconsistencies. Revise your report as necessary to make sure it is clear, concise, and well-organized.

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Answer:

C. None of these

2 volumes of zinc sulphide produces two volumes of Sulphur dioxide. So, 9.7g of ZnS will produce nothing less than 9.7g of SO2.

Answer:

The radiation of the Sun's electromagnetic waves

Explanation:

Earth's atmosphere keeps much of the Sun's energy from escaping into space. This process, called the greenhouse effect, keeps the planet warm enough for life to exist.

Answer:

37.84 Liters

Explanation:

(see picture)

Answer:

genetics i.e the law of heredity

Answer:Mendel proposed three laws: Law of Dominance. The Law of Segregation. Law of independent assortment.

Explanation:Gregor Johann Mendel was a scientist who is recognized as the Father and Founder of genetics. Mendel conducted many experiments on the pea plant (Pisum sativum) between 1856 and 1863. He studied the results of the experiments and deducted many observations. Thus, laws of inheritance or Mendel’s laws of inheritance came into existence. Before learning about Mendel’s laws of inheritance, it is important to understand what the experiments performed by Mendel were.

SiF4 has a central silicon atom that is surrounded by four fluorine atoms, and each fluorine atom forms a single covalent bond with the silicon atom. The correct option is D.

The Lewis structures of each molecule. For CO2, the central carbon atom has two double bonds with oxygen atoms, resulting in four electron pairs around the carbon atom, with no nonbonding electron pairs. For H2S, the central sulfur atom has two single bonds with hydrogen atoms and two nonbonding electron pairs, resulting in a total of four electron pairs around the sulfur atom.

For PF3, the central phosphorus atom has three single bonds with fluorine atoms and one nonbonding electron pair, resulting in a total of four electron pairs around the phosphorus atom. Therefore, the only molecule that satisfies the criteria for having a Lewis structure with a central atom having no nonbonding electron pairs is (d) SiF4.

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Explanation:

you can use Born-Lande equation,

U=-(A×e^2×Z+ ×Z- ×N)\r ×(1-1/n)

here,U=lattice energy

A=madelung constant

n=Born exponent(depends on repulsion between ion)

e=charge of electron

Z+,Z-=charge of cation and anion

r=distance between cation and its neighbour anion in

space lattice

Answer:

i think its convection

Explanation: