For an object to remain at rest which of the following statements must be true

Answer: The destruction of crust occurs at deep-sea trenches. Oceanic rocks are pillow-shaped when formed. Rocks across the ocean floor have alternating magnetic stripes. Younger rocks are closer to mid-ocean ridges.

Answer:

latent heat of condensation will have the same absolute value as the latent heat of vaporization. The latent heat of condensation will be negative. The latent heat of condensation is a characteristic property that can be used to identify a substance.

Explanation:

Answer:

energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.

Explanation:

Answer:

It is attached below.

Explanation:

The Lewis structure for H₃NO, also known as ammonia oxide or nitroxyl is given in the image.

Count the total number of valence electrons:

Hydrogen (H) has 1 valence electron.

Nitrogen (N) has 5 valence electrons.

Oxygen (O) has 6 valence electrons.

Total valence electrons = (3 × 1) + 5 + 6 = 14

Determine the central atom:

In this case, nitrogen (N) is the central atom, as it is less electronegative than oxygen (O) and hydrogen (H).

Connect the atoms with single bonds:

Place a single bond (represented by a line) between nitrogen (N) and each hydrogen (H). This accounts for 3 electrons.

Distribute the remaining electrons:

Place the remaining 11 electrons as lone pairs around the atoms to satisfy the octet rule. In this case, nitrogen (N) will have a lone pair, and oxygen (O) will have a lone pair.
Each line represents a single bond, and the lone pairs are represented by pairs of dots or dashes. The hydrogen atoms are bonded to the nitrogen atom, and the oxygen atom has a lone pair.

Hence, the Lewis structure is in the image.

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Answer:

24g of NaOH are required

Explanation:

Molarity, M, is an unit of concentration widely used in chemistry defined as the ratio between moles of solute (In this case, NaOH), and volume of solution in liters.

We can find the moles of NaOH and its mass with the volume and desired concentration as follows:

Moles NaOH:

400.0mL = 0.400L * (1.50mol / L) = 0.600 moles NaOH

Mass NaOH -Molar mass: 40.0g/mol-:

0.600 moles * (40.0g / mol) =

Answer:

900g

Explanation:

Given parameters:

Number of moles  of Sc  = 20moles

Unknown:

Mass of Sc  = ?

Solution:

To find the mass of the scandium given, we use the expression below:

      Mass  = Number of moles x molar mass

Molar mass of Sc   = 45g/mol

So;

     Mass of Sc  = 20 x 45 = 900g

The amount of heat required to raise the temperature of 125.0 g of aluminum by 12°C is 1611 joules.

Temperature = 12°C

Mass = 125.0 g

To estimate the amount of heat required, we need to use the formula:

Q = m * c * ΔT

Q = the amount of heat in joules

m = the mass of the substance in kilograms

c = the specific heat capacity of the substance

ΔT = the change in temperature in degrees

The specific heat capacity of aluminum = 0.897 J/g°C.

Q = 125.0 g * 0.897 J/g°C * 12°C

Q = 1611 J

Therefore, we can conclude that the amount of heat required is 1611 J.

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Intravenous (IV) solutions are usually given at a slower rate to older adults to avoid a fluid overload.

Intravenous (IV) solutions are usually given at a slower rate to older adults to avoid a fluid overload. In this condition, excess fluid builds up in the body, which may result in swelling, shortness of breath, and other complications. Furthermore, the kidneys' efficiency to excrete excess fluids and solutes diminishes with age, contributing to an increased risk of electrolyte imbalance, dehydration, and toxicity.

Also, older adults are more prone to have chronic diseases such as hypertension, heart disease, and diabetes that may affect fluid and electrolyte balance. Therefore, it's essential to regulate the rate of IV solutions and monitor electrolyte levels carefully to avoid any adverse effects.

The amount of fluid, type of IV solution, and administration rate should be tailored to the individual's needs and medical condition. Overall, the infusion rate of IV fluids should be slow and cautious, particularly in older adults, to prevent complications related to fluid overload.

Usually, a slow infusion rate of IV solution is prescribed to the older adults to avoid a fluid overload. Older people's kidneys are less efficient in excreting excess fluids, which could lead to swelling, shortness of breath, and other complications. They are also more prone to chronic diseases such as hypertension, heart disease, and diabetes, which could affect fluid and electrolyte balance.

Hence, it's crucial to regulate the rate of IV solutions and monitor electrolyte levels carefully to avoid any adverse effects.

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A substance that is only made up of carbon and hydrogen has a mass composition of 85.7% c and 14.3% h. The compound's empirical formula is CH₂.

An empirical formula is a chemical formula for a compound that only specifies the proportions of the components present rather than the exact number of atoms.

The empirical formula for molecules is the most straightforward iteration of the molecular formula. To find this, divide each subscript in the formula by its lowest common denominator.

Atomic mass number % is the easiest formula to use to calculate an element's percentage in relation to the number of atoms.

With a density of 85.7 and an atomic mass of 12, carbon has a mass number of 7.141.

Hydrogen has a mass of 14.3 and

an atomic mass of 1 = 14.3 / 1 = 14.3²

As a result, the compound's empirical formula is C₁H₂= CH₂.

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In the reaction

2Mg(s)+CO₂(g)→2MgO(s)+C(s)

The reactant which is going to oxidised is Mg(s) and the reactant which is going to reduce is CO₂(g).

Oxidation is defined as the loss of electron from the element, whereas reduction is defined as the gain of electron done by the element. When any element is present in solid form, its oxidation state is zero. Hence, the oxidation state of Mg(s) and C(s) is zero. The oxidation state of O is -2. On product side, the oxidation state of Mg is

x+(-2)=0

x-2=0

x=+2

The oxidation state of Mg is increased from zero(0) to 2. Hence, Mg(s) is oxidised.

The oxidation state of C in CO₂(g) is

x+2(-2)=0

x+(-4)=0

x-4=0

x=4

The oxidation state of C is decreased from +4 to 0. Hence, C in CO₂ is reduced in the reaction.

Therefore, the reactant which is going to oxidised is Mg(s) and the reactant which is going to reduced is CO₂(g).

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Answer:

Electromagnet

Explanation:

A buffer system is designed to maintain a specific pH level (option c).

Buffer systems are essential in biological and chemical processes as they prevent significant changes in pH by resisting alterations in acidity or alkalinity. They consist of a weak acid and its conjugate base (or a weak base and its conjugate acid). When an acid or base is added to the buffer system, the weak acid or base reacts with the added component, minimizing the change in pH.

The buffer system achieves this by absorbing or releasing hydrogen ions (H+) to maintain a relatively constant pH. This ability to regulate pH is crucial for various physiological functions, such as maintaining proper enzyme activity and cellular processes.

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Answer:

Sodium and chlorine combine to make salt

Explanation:

Answer:

vinegar and soda

Explanation:

:)

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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Option (a) is the answer because the reaction is endothermic and therefore ΔHRXN > 0 .

Equilibrium is a state in which the forward and backward reaction rates are the same, and the concentration of the reactants and products does not change over time. The reaction in the question is: HF(aq)+ H2O(l) arrows both ways H3O+ + F-(aq)When the temperature is raised, the conductivity of the solution will rise because, in the presence of heat, HF breaks down to produce more ions. The ionization of HF increases with temperature. If HF is more ionized, the conductivity of the solution will be higher.The reaction is endothermic because heat is absorbed in order to break the H-F bond. The energy of the system increases when the reactants are converted to products as a result of this process, and so ΔHRXN is positive. Option (a) is the answer because the reaction is endothermic and therefore ΔHRXN > 0.

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Answer:

2.691*10^6 g

Explanation:

Glycogen and starch are the examples of the specific category of carbohydrates are called as polysaccharides.

Polysaccharides are complex carbohydrates that are made up of long chains of monosaccharide units (simple sugars) joined together through glycosidic bonds. They are composed of repeating units of monosaccharides, which can be the same or different.

Glycogen is a polysaccharide found in animals and serves as the primary storage form of glucose in animals. It is highly branched and plays a crucial role in storing and releasing glucose as needed by the body.

Starch, on the other hand, is a polysaccharide found in plants and serves as a major energy storage molecule in plants. It consists of two main components: amylose, a linear chain of glucose molecules, and amylopectin, a highly branched structure.

Both glycogen and starch are energy storage molecules. Their complex structure and branching allow for efficient storage of glucose, which can be readily broken down when energy is needed.

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Answer:

The earlier bog bodies that were discovered in the 1600s might have not been preserved properly due to a lack of knowledge on how to preserve them or a lack of awareness of their significance. It is also possible that they might have decayed and decomposed over time and not survived till the present day. However, the bog bodies found after the late 1800s were preserved and studied extensively due to the increasing awareness and understanding of their historical and archaeological significance.

Explanation:

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The net diffusion of K out of the neuron is reduced when the extracellular K concentration is increased.

Extracellular K ions have a vital role to play in maintaining the correct balance of ions that are present within the neurons. The net diffusion of K out of the neuron is reduced when the extracellular K concentration is increased. It can be explained by the Nernst Equation.

According to the Nernst equation, there is a direct relationship between the ion concentration and the potential across the membrane. If the extracellular K ion concentration is higher, the potential difference required to create an equilibrium state is higher. This is due to the fact that the membrane potential is proportional to the concentration of ions across the membrane.

If the concentration gradient is smaller, the equilibrium potential will be lower, meaning the net diffusion of ions out of the neuron will be reduced.

Therefore, increasing extracellular K will reduce the net diffusion of K out of the neuron.

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Answer:

The clear liquid is less dense than the black liquid, which is why it floats on top. If the volume were different, you would visually see more clear liquid than black and vice versa.

The clear liquid is less dense than the black liquid

Answer:

A. The clear liquid is less dense than the black liquid

Explanation:

Since the clear liquid since on top of the black one it's density is less. Whatever liquid has a higher density will sink to the bottom of the flask.

The internal temperature should raw meat poultry and seafood be stored in  4°C ( 39 °F ).

The safe temperature range or the internal temperature should raw meat poultry and seafood be stored in  4°C ( 39 °F ). Food is stored in the refrigerator to use as per their need. This steps issued for the safety of the safety of ensure to health to consumer.  to ensure the disease free  and the consumable items. raw meat , poultry and the seafood should be stored on the bottom shelf to avoid contamination.

Thus, The internal temperature should raw meat poultry and seafood be stored in  4°C ( 39 °F ).

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Answer:

the zinc strip begins to darken. If left in the solution for a longer period of time, the zinc will gradually decay due to oxidation to zinc ions.

Explanation:

Answer:

Applying the Laws of Thermodynamics we get as,

Explanation:

V1/T1 = V2/T2

According to the law of Gaseous states.

so we get as,

V1 = 380 ml, V2 = 250 ml, T2 = -55°C ==> 273-55 ==> 218 Kelvin.

so now substituting we get as,

380/ T1 =250/218

==> 380*(218) /250 = T1

==> T1 = 331.36 ===>T1 = 331 K approx

So the Original Temperature was 331 K,

Option 1.) is correct.

Answer

27.59 is the answer

Answer:

I love Science anyways

The ans is in the picture with the  steps how i got it

(hope this helps can i plz have brainlist :D hehe)

Explanation:

The density of the gas at 84.0 °C and 721 mmHg, given that the gas has an initial density of 1.87 grams/liter, is 1.55 grams/liter

The following data were obtaibed from the question:

The new density of the gas can be obtained as illustrated below:      

D₁T₁ / P₁ = D₂T₂ / P₂

(1.87 × 307) / 745 = (D₂ × 357) / 721

Cross multiply

745 × 357 × D₂ = 1.87 × 307 × 721

Divide both side by (745 × 357)

D₂ = (1.87 × 307 × 721) / (745 × 357)

D₂ = 1.55 grams/liter

Thus, the density of the gas is 1.55 grams/liter

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7.77 × 10^(-4) in standard notation is 0.000777.

To convert a number from scientific notation to standard notation, we need to multiply the coefficient (7.77) by the power of 10 (-4). In this case, the given number is 7.77 × 10^(-4).

To convert it to standard notation, we need to move the decimal point to the left or right based on the exponent of 10. Since the exponent is negative (-4), we move the decimal point four places to the left.

Starting with the number 7.77, we move the decimal point four places to the left:

7.77 → 0.000777

Therefore, 7.77 × 10^(-4) in standard notation is 0.000777.

In standard notation, we express the number without any exponent or power of 10. It is a way to represent the number in a more conventional format, where the decimal point is placed in relation to the significant digits of the number.

Remember to correctly place the decimal point when converting between scientific notation and standard notation, considering the positive or negative exponent of 10.

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The adjacent nucleotides are bound to each other through a phosphodiester bond in a nucleic acid.

Nucleic acid is a biopolymer made up of nucleotide monomers that make up nucleic acid chains. The nucleotide's three components are a five-carbon sugar, a phosphate group, and a nitrogenous base. Nucleic acids are present in all living cells, including viruses and bacteria, and they play a critical role in storing, transmitting, and expressing genetic information. RNA and DNA are two types of nucleic acids.

The phosphate group in one nucleotide forms a phosphodiester bond with the hydroxyl group on the sugar molecule of the next nucleotide in line in nucleic acids. This reaction is carried out by removing a molecule of water, resulting in a strong covalent bond between two nucleotides. These bonds make up the sugar-phosphate backbone of a nucleic acid chain, which is fundamental to its structure.

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Answer:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness. Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed. But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.--Such has been the patient sufferance of these Colonies; and such is now the necessity which constrains them to alter their former Systems of Government. The history of the present King of Great Britain is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these States. To prove this, let Facts be submitted to a candid world.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, periodic table is the best platform to understand element.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Periodic table is the best platform to have a look to all elements at once that are arranged in columns and groups mentioning their valences, electronegativity and Ionisation energy symbols.

Therefore, periodic table is the best platform to understand element.

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Two ways that stress could negatively impact a students performance is by causing them to procrastinate. When you're stressed, you tend to keep putting things off because you "just can't deal with it" at the moment. This could cause the student to turn in their assignments late (or not at all) and cause their grades to drop. Additionally, when you're stressed, it's harder to fall asleep, and once you are, you don't sleep as well. Sleep deprivation can greatly affect a student's in class performance by causing them to fall asleep in class, or not pay attention as well.

Explanation:

We have to balance the following equation:

__ H₂O + __ F₂ -------> __ HF + __ O₂

First we have to determine the number of atoms of each element that we have on both sides of the equation.

__ H₂O + __ F₂ -------> __ HF + __ O₂

O: 1 O: 2

H: 2 H: 1

F: 2 F: 1

We have 2 atoms of O on the right side and 1 atom of O on the left side. To balance the O atoms we can change the coefficient for H₂O and write a 2 in front of it.

2 H₂O + __ F₂ -------> __ HF + __ O₂

O: 2 O: 2

H: 4 H: 1

F: 2 F: 1

Then we have 4 atoms of H on the left and 1 atom of H on the right side of the equation. We can change the coefficient for HF to balance the H atoms.

2 H₂O + __ F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 2 F: 4

And finally we have 2 atoms of F on the left and 4 atoms of F on the right. We can change the coefficient for F₂ and write a 2 there.

2 H₂O + 2 F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 4 F: 4

The equation is balanced.

Answer: 2 H₂O + 2 F₂ -------> 4 HF + O₂

Answer:

C. Carbon dioxide has increased as a result of increased human activities.

Explanation:

THESE ARE THE OPTIONS FOR THE QUESTION BELOW

A. Carbon dioxide is emitted from fertilizers used in farming.

B. Other greenhouse gases trap more heat than carbon dioxide.

C. Carbon dioxide has increased as a result of increased human activities.

D. Carbon dioxide is emitted from commercial refrigeration.

Global warming can be regarded as

long-term heating of climate system of the Earth, this has been a point if observation even as far as pre-industrial period arround 1850. This global warming can be attributed to activities such as human activities as well as primarily fossil fuel burning, and as a result of this there is rise in heat-trapping, increase in greenhouse gas levels arround the atmosphere of the Earth. Human activities that brings about increase of Carbon dioxide concentration in the atmosphere are ;

✓ burning of oil as well as coal and gas,

✓deforestation

Hence, many scientists believe that carbon dioxide has likely contributed more to global warming than other greenhouse gases as a result of increase in Carbon dioxide which is as a result of increased human activities.

Greenhouse gas, any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth's surface and reradiating it back to Earth's surface, thus contributing to the greenhouse effect. Carbon dioxide, methane, and water vapour are the most important greenhouse gases.

Answer:

C

Explanation:

Just took quiz on edg. 2021