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The weight at a given point in the water remains unchanged when a boat passes over it.


The weight at a specific location in the water is determined by the mass of the water above that point. When a boat passes over the water, it displaces some of the water, causing it to move and change position. However, the total mass of the water above that point remains the same.

Since weight is directly proportional to mass, the weight at that location does not change. The boat's weight contributes to the overall weight of the water and affects the buoyancy of the boat, but it does not alter the weight at a specific point in the water. Therefore, the weight at that location remains constant.

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Answer:

true

Explanation:

the answer is true

The Food Safety and Inspection Service (FSIS) is responsible for inspecting meat, poultry, and eggs.

FSIS is a public health agency within the United States Department of Agriculture (USDA). It is responsible for ensuring the safety, wholesomeness, and labeling accuracy of meat, poultry, and egg products produced in the United States and imported into the country. The FSIS was established in 1906 under the Pure Food and Drug Act, which mandated federal inspection of meat products.

The agency has since expanded its responsibilities to include poultry and egg products as well. Its inspectors are present in all meat, poultry, and egg processing plants to ensure that these products meet federal safety standards. FSIS inspections cover all aspects of meat, poultry, and egg production, including sanitation, hygiene, processing, labeling, and packaging. The agency's ultimate goal is to protect public health by preventing the consumption of contaminated or mislabeled food products.

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The concentration of the Nitric acid solution : 0.114 M

Titration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range  

Titrations can be acid-base titration, depositional titration, and redox titration. An acid-base titration is the principle of neutralization of acids and bases  

Reaction

HNO₃ + NaOH → NaNO₃ + H₂O​

Concentration a standard solution  of sodium hydroxide :  0.0998 mol/dm³ , and the volume = 25 cm³

moles NaOH=

\(\tt mol=M\times V\\\\mol=0.0998\times 25\\\\mol=2.495~mlmoles\)

From the equation, mol ratio HNO₃ : NaOH = 1 : 1, so mol HNO₃ = mol NaOH=2.495 mlmoles

The volume of HNO₃ = 21.8 cm³, so the concentration :

\(\tt M=\dfrac{n}{V}\\\\M=\dfrac{2.495}{21.8}\\\\M=0.114\)

The concentration of the nitric acid solution is 0.11445 mol/dm³

From the question,

We are to calculate the concentration of the nitric acid solution

The given balanced chemical equation for the reaction is

HNO₃ + NaOH → NaNO₃ + H₂O​

This means 1 mole of HNO₃ is needed to completely neutralize 1 mole of NaOH

Using the formula

\(\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}\)

Where \(C_{A}\) is the concentration of acid

\(C_{B}\) is the concentration of base

\(V_{A}\) is the volume of acid

\(V_{B}\) is the volume of base

\(n_{A}\) is the mole ratio of acid

\(n_{B}\) is the mole ratio of base

From the given information

\(C_{B}= 0.0998\ mol/dm^{3}\)

\(V_{A} = 21.80 \ cm^{3}\)

\(V_{B} = 25.0 \ cm^{3}\)

From the balanced chemical equation

\(n_{A} = 1\)

\(n_{B} =1\)

Putting the parameters into the formula, we get

\(\frac{C_{A} \times 21.80 }{0.0998 \times 25.0} = \frac{1}{1}\)

Then,

\(C_{A} \times 21.80=0.0998 \times 25.0\)

∴ \(C_{A}=\frac{0.0998 \times 25.0}{21.80}\)

\(C_{A} =\frac{2.495}{21.80}\)

\(C_{A} = 0.11445 \ mol/dm^{3}\)

Hence, the concentration of the nitric acid solution is 0.11445 mol/dm³

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Answer:

B. control rods and moderators

Answer:

by hand

boiling

by hand

boiling

Explanation: theres not enough context on how to answer the question so i hope this helps

Answer:

Calcium is more reactive.

Explanation:

It is higher in the reactivity series, and contains more energy levels.

The attributes of the genetic code include all of the following except B. Each codon specifies more than one amino acid.

A. Each codon consists of 3 nucleotides: This is a correct attribute of the genetic code. Codons are made up of three consecutive nucleotides, which form the basic unit of the genetic code.

B. Each codon specifies more than one amino acid: This is incorrect. Each codon typically specifies only one amino acid. However, there are some exceptions called "ambiguous codons" where a single codon can code for more than one amino acid, but they are relatively rare.

C. Codons are non-overlapping: This is a correct attribute of the genetic code. Codons are read sequentially and are not overlapping. Each codon starts at a specific position in the DNA or mRNA sequence.

D. Most amino acids are specified by more than one codon: This is a correct attribute of the genetic code. With a few exceptions, most amino acids are encoded by multiple codons. This redundancy provides some level of error tolerance and allows for variations in the DNA sequence without affecting the encoded protein.

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Hydrophilic substances, but not hydrophobic substances, have an affinity or tendency to interact with or dissolve in water.

Hydrophobic substances are substances that repel or are resistant to water. The term "hydrophobic" comes from the Greek words "hydro" meaning water and "phobos" meaning fear or aversion. Hydrophobic substances are typically nonpolar or have very low polarity, meaning they lack the ability to form strong interactions or hydrogen bonds with water molecules.

In the presence of water, hydrophobic substances tend to aggregate or clump together, minimizing their contact with water. This behavior is known as the hydrophobic effect. It arises due to the tendency of water molecules to maximize their hydrogen bonding interactions with each other, forming a network of hydrogen bonds.

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Answer: to protect giant pandas

Explanation:

To calculate the equilibrium constant, Keq, for the reaction at 373 K, the ratio of the product concentrations (in this case SO2 and Cl2) to the reactant concentrations.

(in this case SO2C2) at equilibrium must be determined. SO2C2 has a beginning concentration of 0.0106 mol/L, whereas SO2 and Cl2 have initial concentrations of 0.0287 mol/L each. The equilibrium constant, Keq, may be calculated as follows: [SO2][Cl2] / [SO2C2] = Keq The Keq may be determined by plugging in the values: (0.0287 mol/L)2 / (0.0106 mol/L) = 8.20 Keq So, at 373 K, the Keq for the reaction is 8.20.calculate the equilibrium constant, Keq, for the reaction at 373 K, the ratio of the product concentrations (in this case SO2 and Cl2) to the reactant concentrations.

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changes in the Sun's magnetism produce a greater number of sunspots, more energy and cause solar eruptions of particles

Answer:

Explanation:

2.38 moles

There are 2.38 moles present in a 200-gram sample of sodium bicarbonate with a chemical formula of NaHCO3.

Answer:

Number of moles = weight of substance / molar mass of substance. Therefore, 100 grams of N2 = 100/ 28 moles. Number of molecules of N2 = number of moles x Avogadro number. Since, N2 is diatomic molecule which contain two atoms of nitrogen.

Answer:

if the object sank then that object has a greater density then water. if the object floated then its density is lower then water.

Explanation:

lets say object 1 has a density of 24/cm3. the density is greater then water (1.0000g/cm3) so it would sink. now lets say object 2 has a density of 0.79383g/cm3 since it's less then the density of water (1.0000g/cm3) it would float.

Hydrothermal solutions are hot subsurface waters that are rich in minerals and gases. These waters are formed when groundwater or seawater is heated by the Earth's mantle and rises to the surface through cracks in the crust. When the hot water comes in contact with rocks and minerals, it dissolves them and becomes enriched with minerals and gases.

The minerals found in hydrothermal solutions include sulfur, copper, gold, silver, and zinc, among others. These minerals are often deposited around the vent or opening through which the water exits, creating mineral deposits known as hydrothermal vents. Hydrothermal solutions are also known to contain gases such as hydrogen sulfide, carbon dioxide, and methane.

These gases can create unique ecosystems around hydrothermal vents, providing energy and nutrients to organisms that live there. Overall, hydrothermal solutions are fascinating geological phenomena that have significant economic and ecological importance.

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(i) The vehicle outputs approximately 11.58 kg of CO₂ per week. (ii) The Biofuel Obligation Scheme in Ireland is implemented by requiring fuel suppliers.

To calculate the amount of CO₂ output per week, we need to determine the amount of fuel used and then use the given combustion equation to find the ratio of CO₂ produced per unit of fuel.

Given;

Average fuel efficiency: 7.5 km per litre

Distance traveled per week: 300 km

Mass of fuel per litre: 0.75 kg

First, we calculate the total fuel used per week;

Fuel used = Distance traveled / Fuel efficiency

= 300 km / 7.5 km per litre

= 40 litres

Next, we find the mass of fuel used per week:

Mass of fuel used = Fuel used × Mass of fuel per litre

= 40 litres × 0.75 kg per litre

= 30 kg

Using the combustion equation, we know that 2 moles of C₈H₁₈ produce 16 moles of CO₂. Therefore, we can calculate the moles of CO₂ produced from the given mass of fuel;

Moles of CO₂ produced = Moles of C8H18 × (16 moles of CO₂ / 2 moles of C₈H₁₈)

= (30 kg / (114 g/mole)) × (16 moles of CO₂ / 2 moles of C₈H₁₈)

= (30,000 g / 114 g/mole) × (16 moles of CO₂ / 2 moles of C₈H₁₈)

= 263.16 moles of CO₂

Finally, we convert the moles of CO₂ to kilograms;

Mass of CO₂ produced = Moles of CO₂ produced × Molar mass of CO₂

= 263.16 moles × (44 g/mole)

= 11,579.04 g

= 11.58 kg (rounded to two decimal places)

Therefore, the vehicle outputs approximately 11.58 kg of CO₂ per week.

The Biofuel Obligation Scheme in Ireland is implemented by requiring fuel suppliers to include a certain percentage of biofuels in their overall fuel sales, thereby reducing the carbon footprint by promoting the use of renewable and lower-carbon-emitting fuels.

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Answer: Carbon's valence shell is unique because it has 4 valence shell electrons, which means it is less likely to gain or lose electrons to other elements. Rather, it shares its electrons. In other words, it tends to form covalent bonds (4) rather than ionizing. This results in carbon being able to form long chains or rings.

To determine the volume of 0.258 M NaOH required to completely neutralize 2.00 g of acetic acid, we need to use the balanced equation and the stoichiometry between the acid and the base.

The balanced equation between acetic acid (CH3COOH) and sodium hydroxide (NaOH) is:

CH3COOH + NaOH -> CH3COONa + H2O

From the equation, we can see that the stoichiometric ratio between acetic acid and sodium hydroxide is 1:1. This means that 1 mole of acetic acid reacts with 1 mole of sodium hydroxide.

First, let's calculate the number of moles of acetic acid (CH3COOH) using its molar mass:

Molar mass of acetic acid (CH3COOH) = 12.01 g/mol + 3(1.01 g/mol) + 12.01 g/mol + 16.00 g/mol + 1.01 g/mol = 60.05 g/mol

Moles of acetic acid = Mass / Molar mass = 2.00 g / 60.05 g/mol ≈ 0.0333 mol

Since the stoichiometric ratio is 1:1, the number of moles of sodium hydroxide (NaOH) required to neutralize the acetic acid is also 0.0333 mol.

Now, let's calculate the volume of 0.258 M NaOH solution using the molarity and the number of moles:

Volume (L) = Moles / Molarity

= 0.0333 mol / 0.258 mol/L ≈ 0.129 L

Finally, let's convert the volume from liters to milliliters:

Volume (mL) = Volume (L) × 1000 mL/L ≈ 129 mL

Therefore, approximately 129 milliliters of 0.258 M NaOH are required to completely neutralize 2.00 grams of acetic acid.

The volume of 0.258 M NaOH required is approximately 129 mL.

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Answer:

12916000

Explanation:

When you're converting from a scientific notation into real number (standard form), you must move the decimal based on the power of 10. Since the power of 10 is 7, I moved the decimal place to the right 7 times thus giving me 12916000.

I hope this helps! :D

Answer: 1. \(NH_3\) increases.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

For the given equation:

\(N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g)+energy\)

If the concentration of \(N_2\) is increased , according to the Le-Chatlier's principle, the reaction has to shift to right or forward direction. In order to do that  the concentration of products has to increase.

Thus the concentration of \(NH_3\) increases.

False. The term for underground conductors between the utility electric supply system and the service point is not specified in the statement.

However, commonly, these underground conductors are referred to as service cables or service conductors. They are responsible for delivering electricity from the utility electric supply system to the service point, which is typically the location where the electrical service is connected to the customer's premises. The specific term may vary depending on the region or electrical system, but "_," as presented in the statement, does not accurately describe this type of underground conductor.

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In order to determine where testing of tornado warning systems would be most effective in the United States, it is important to understand the areas of the country that are most prone to tornadoes.

The Midwest region is known as "Tornado Alley" due to its high frequency of tornadoes, particularly in states such as Oklahoma, Kansas, and Texas. However, the northeast and mid-Atlantic regions also experience tornadoes, although less frequently. The pacific northwest and West regions are not as prone to tornadoes but still experience them on occasion.

Based on this information, it would make sense for the national government to focus testing efforts on the Midwest region, particularly in areas where tornadoes are most frequent. This could help improve warning systems and potentially save lives in areas where tornadoes are a common occurrence. However, it is also important for warning systems to be effective in all regions of the country where tornadoes may occur, so testing in other regions should not be neglected. Ultimately, the goal should be to improve warning systems nationwide in order to better protect people from the dangers of tornadoes.

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Answer:

1 and 4 and 24

Explanation:

I know this because i passed 1st grade

187.1 g/mol

Hope that helps!

The mass of  each substances are Calcium nitrate = 0.08146 mole, Ammonium fluoride = 0.37 mole , Calcium fluoride = 6.3538  g, Dinitrogen monoxide=7.16848 g and Water=  5.86512 g

Ca(NO3)2 + 2 NH4F → CaF2 + 2 N2O + 4 H2O.
1. convert the given reactant mass into moles.
Calcium nitrate : 13.36/164=0.08146 mole
Ammonium Fluoride : 13.92/37 = 0.37 mole


One mole of Ca(NO3)2 completely reacts with 2 moles of
Ammonium Fluoride = 2 x 0.08146 =0.16292.
mole of NH4F reacts completely with calcium nitrate .
Ammonium Fluoride left = 0.37 - 0.16292 = 0.20708 mole
= 0.20708x 37 = 7.66 g is left.


Calcium nitrate is the limiting reagent:
Amount of CaF2 formed =  0.08146 mole * 78 = 6.3538  g.
(since one mole of Calcium nitrate gives one mole of CaF2).    
Amount of dinitrogen monoxide formed = 0.08146x2x44= 7.16848 g
Amount of water formed =0.08146x4x18= 5.86512 g.


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Answer:

0.162 mol

Explanation:

n=m/M

M= 20*3 + 15*2 + 8*4*2

M=154 g/mol

n=25g/154g/mol

n=0.162 mol

The number of moles in 25 grams of calcium phosphate is 0.162 mol.

Mole is a SI unit that is used to measure the quantity of any substance in a specific amount. To calculate the moles, we will divide the mass of the substance by the molar mass of that substance.

n = m/M

Calcium phosphate is a chemical compound that contains calcium and phosphorus or phosphoric acid, and it is used to treat the low calcium in the body and thyroid and parathyroid.

The molar mass of calcium sulfate is 154 g/mol

The mass of calcium sulfate is 25 grams

Putting the value in the equation

n = m/M

n = 25g / 154 g/mol = 0.162 mol

Thus, the moles of calcium sulfate are 0.162 mol.

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Answer:

Yes,

Chemical Reactivity of metals decrease as you go left to right of the periodic table Chemical Reactivity increases as you go down the group....

Explanation:

Hope it Helps!!!

:)

10.3 g of Al is required to completely react with 30.0 g of MnO₂. The correct answer is option D.

Manganese dioxide reacts with aluminum to produce manganese and aluminum oxide. Here's the balanced chemical equation: 3MnO₂ + 4Al → 3Mn + 2Al₂O₃. Now, let's calculate the mass of Al required to react completely with 30.0 g of MnO₂: From the balanced equation, we can see that 3 moles of MnO₂ react with 4 moles of Al.

The molar mass of MnO₂ is 86.94 g/mol. 30.0 g of MnO₂ is equal to:30.0 g / 86.94 g/mol = 0.3444 mol MnO₂. According to the balanced equation, 0.3444 mol of MnO₂ requires: 4/3 × 0.3444 mol = 0.4592 mol of Al. The molar mass of Al is 26.98 g/mol. 0.4592 mol of Al is equal to: 0.4592 mol × 26.98 g/mol = 12.4 g of Al. Therefore, 12.4 g of Al is required to completely react with 30.0 g of MnO₂. Hence, option D is the correct answer.

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