what challenges arise when nuclear material is removed from a power plant?

Answer:

it all depends,if the piece of wood is 7mm,you won't need the result taken to a significant figure except your asked to do it via school work.

Answer:

The atoms in a liquid are closely packed, but able to slide past eachother.

The atoms in a gas spread as far apart as possible.

a solid has a definite shape and volume.

The shape of a liquid can change, but the volume is definite.

Answer:

The atoms in a LIQUID are closely packed, but able to slide past eachother.

The atoms in a GAS spread as far apart as possible.

a SOLID has a definite shape and volume.

The shape of a LIQUID can change, but the volume is definite.

Explanation:

Answer:You have it right the answer is c!

Explanation:

Answer:

c ........................!

Answer:

\(\boxed {\boxed {\sf N_2}}\)

Explanation:

Let's examine this reaction, especially the coefficients.

\(N_2+3H_2 \rightarrow 2NH_3\)

First of all, remember that reactants are used to make the product. They are found on the left of the arrow usually. Therefore, N₂ and H₂ are the reactants, while NH₃ is the product. We can automatically eliminate NH₃ from our answer choices, because it is simply not a reactant.

Next, look at the coefficients.

Therefore, for the reaction to work, there must be 1 mole of N₂ and 3 moles of H₂.

We have 3.2 moles of N₂ and 5.4 moles of H₂.

Divide each amount given by the required amount for completion.

Therefore, there is enough nitrogen to complete the reaction 3.2 times, but only enough hydrogen for 1.8 times. If everything is completely reacted, we will run out of hydrogen and have excess nitrogen.

Answer: Yes, sulfuric acid is highly soluble in water.

Explanation:

Answer:

45.6 degrees Celsius

Explanation:

Answer:

ask a question

research the question

make a hypothesis

do the experiment

collect and record data

arrive at a conclusion

Explanation:

Answer:

31.0kJ

Explanation:

To a temperature of 19.8°C

To solve this question we must, as first, find the heat necessary to melt the 78.0g of methanol. Then, the heat to increase the temperature from the melting point (-97.53°C) to 19.8°C as follows:

Melting methanol -Molar mass: 32.04g/mol-

78.0g * (1mol / 32.04g) = 2.434 moles

As heat of fusion is 3.215kJ/mol:

2.434 moles * (3.215kJ / mol) = 7.83kJ

Heating methanol:

Q = S*m*ΔT

Where Q is heat in J,

S is specific heat = 2.53J/g°C

m is mass of methanol = 78.0g

ΔT is change in temperature = (19.8°C - (-97.53°C)) = 117.33°C

Replacing:

Q = 2.53J/g°C*78.0g*117.33°C

Q = 23154J

Q = 23.2kJ

Total heat is:

Increasing the NaCl concentration will increase the osmotic pressure.

Osmotic pressure, alongside the vapor pressure depression, freezing point depression and the boiling point elevation are the colligative properties od solution.

The direction of osmotic pressure is always from the side with the lower concentration of solute to the side with the higher concentration.

π = c(NaCl) × T(NaCL) × R

π is osmotic pressure

c is concentration of solution.

T is temperature in Kelvins.

R is universal gas constant.

Greater the concentration of sodium chloride, the greater is the osmotic pressure, because the osmotic pressure and the concentratio are in direct proportion.

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The energy required to separate the two ions to an infinite distance apart is -1.64 * 10⁻¹⁸ J.

The potential energy required to separate two ions to an infinite distance apart is called lattice energy. The equation for lattice energy is given as follows:

U = -N (A * Z⁺ * Z⁻ / r)

where,U represents lattice energy

N represents Avogadro's constant

A represents the Madelung constant

Z+ represents cation's charge

Z- represents anion's charger represents the distance between the ion centers

As given in the question, the distance between the potassium and chloride ions in potassium chloride is 2.8e⁻¹⁰m.

Thus, putting all the values in the formula of lattice energy, we get;

U = -6.022 * 10²³* (2.31 * 10⁻¹⁰ * 1 * 1 / 2.8 * 10⁻¹⁰)U = -1.64 * 10⁻¹⁸J

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Answer:

1.255 L

Explanation:

Assuming that carbon dioxide acts as an ideal gas given the following conditions, using the ideal gas equation shown below

                                                      \(pV \ = \ nRT\),

and since

                                                         \(n \ = \ \displaystyle\frac{m}{M_{r}}\),

rewriting and rearranging the prior equation to make the variable \(V\) the subject, yields

                                                         \(V \ = \ \displaystyle\frac{mRT}{pM_{r}}\),

where \(V\) is the volume occupied by the gas, \(m\) is the mass of the gas, \(R\) is the gas constant, \(T\) is the temperature in Kelvins, \(p\) is the pressure exerted by the gas and \(M_{r}\) is the molecular weight of the gas molecule.

Therefore, plugging the given values into the rearranged equation,

                               \(V \ = \ \displaystyle\frac{(2.2 \ \text{g})(0.08314 \ \text{L} \ \text{bar} \ \text{mol}^{-1} \ \text{K}^{-1})(27 \ + \ 275) \text{K}}{(1 \ \text{bar})(12 + 2 \times16)\text{g mol}^{-1}} \\ \\ V \ = \ 1.255 \ \text{L} \quad \text{(4 s.f.)}\)

Answer:

number 2 formation of substance in a different state

Answer:

The value 9.8 m/s^2 is the average acceleration of a falling object due to the force of gravity on Earth. The letter g represents this value the formula v=gt. With this constant and formula, the speed of an object is calculated at the time t in seconds after it is dropped.

All objects fall at the same rate of speed due to gravity, regardless of their weight. If a small grain of sand and a bowling ball are dropped at the same time, both hit the floor at the same time. The value of g varies by one's location on the planet, ranging from 9.782 m/s^2 in the Panama Canal Zone to 9.832 m/s^2 at the Noth Pole

Explanation:

Answer:

C

Explanation:

It was the first to show that the atom had no net charge.

A first-order reaction refers to a reaction in which the rate of the reaction is directly proportional to the concentration of a single reactant raised to the first power and is expressed as it would take approximately 46.4 minutes for the 80% completion of this first-order reaction to occur. 46.4 minutes.

Rate = k[A]

In this equation, k is the reaction rate constant, and [A] represents the concentration of reactant A.

The half-life of a reaction of the first order completes in 10 minutes. We need to find out how much time will be needed for the 80% completion of this reaction.

To solve for the time needed for 80% completion of a reaction of the first order, we need to use the formula:

Time for 80% completion = 2.303/k x log ([A]₀/[A]t)

where k is the reaction rate constant, [A]₀ is the initial concentration of the reactant and [A]t is the concentration of the reactant after the given time t, and 2.303 is a conversion factor.

Let [A]₀ = 1 and [A]t = 0.2 (since 80% completion means 20% of the original concentration remains)

We know that, t1/2 = 10 min;

therefore, k = 0.693/t1/2

= 0.693/10

= 0.0693 (as 0.693 = ln2)Now,

Time for 80% completion

= 2.303/k x log ([A]₀/[A]t)

= 2.303/0.0693 x log(1/0.2)

= 46.4 minutes

Therefore, it would take approximately 46.4 minutes for the 80% completion of this first-order reaction to occur. 46.4 minutes.

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448 K is the final temperature of the water.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Given,

the mass of Na is 23 g

The volume of water = 293 cm3

Mass of water = 293 g

Total solution mass = 23 g + 293 g = 316 g

Specific heat capacity of water = 4.18 J/Kg

The equation relating mass, heat, specific heat capacity and temperature change is:

q = mcΔT

197 kJ = 316 g x 4.18 J/Kg x (\(T_{finals} - T_ {initial}\))

197 kJ = 316 g x 4.18 J/Kg x ( \(T_{finals}\)-298 K)

0.1491429956 x 1000 =  \(T_{finals}\)-298 K

149.1429956 + 298 = \(T_{finals}\)

447.1429956 = \(T_{finals}\)

448 K = \(T_{finals}\)

Hence, 448 K is the final temperature of the water.

A high specific heat capacity means that it can store a large amount of thermal energy for a small change in mass or temperature.

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Answer:

315 kg

Explanation:

If the ore is 65% waste material, then the mass of the actual sodium in 1 tonne of ore is:

mass of sodium = 0.35 x 1000 kg = 350 kg

The process of electrolysis separates the sodium from the other components of the ore. The amount of sodium extracted will depend on the efficiency of the electrolysis process, which is typically measured by its Faraday efficiency.

The Faraday efficiency is the ratio of the amount of substance actually produced by electrolysis to the amount predicted by the theoretical stoichiometry of the reaction. For the electrolysis of sodium, the theoretical stoichiometry is:

2 Na+ + 2 e- → 2 Na

This reaction requires 2 moles of electrons (2 Faradays) to produce 2 moles of sodium.

If we assume a Faraday efficiency of 90%, this means that 90% of the theoretical amount of sodium is actually produced by electrolysis. Therefore, the mass of sodium extracted from 1 tonne of ore would be:

mass of sodium extracted = 0.9 x (2/2) x 350 kg = 315 kg

So, the company would extract 315 kg of sodium from 1 tonne of ore that is 65% waste material, assuming a Faraday efficiency of 90%.

Answer:

Rods

Explanation:

Rods are photoreceptor cells in the eye that help us see in low light but play little to no role in color vision. Therefore, they would help Phineas to see shades of grey and large shapes in the dark,

Answer:

rods

Explanation:

Answer:

It takes 86 days take to cover half of the lake

Explanation:

In the day #1, the amount of the algae is X,

In the day #2 is 2X

In the day #3 is 2*2*X = X*2²

...

In the day #n the amount of the algae is X*2^(n-1)

Assuming X = 1m³. In the day 87, the area infected was:

1m³*2^(87-1)

7.74x10²⁵m³ is the total area of the lake

the half of this amount is 3.87x10²⁵m³

The time transcurred is:

3.87x10²⁵m³ = 1m³*2^(n-1)

Multiplying for 5 in each side:

ln (3.87x10²⁵) = ln (2^(n-1))

58.9175 = n-1 * 0.6931

85 = n-1

86 = n

ANSWER

Water molecule is a compound

EXPLANATION;

Water molecule is formed from the combination of oxygen and hydrogen atoms

Recall, that compound is the combination of two or more elements that are chemically combined together

Therefore, water molecule is a compound

a an element with the valence electron configuration 3s23p1 would form a monatomic ion with a charge of  +3 in order to form this ion, the element will donate 3 electrons from the 2s 3p subshells.

This indicates that there is 3 valence electron in both the outermost suborbitals and the outermost shell of this atom for an element with its valence electron at 3s23p1. It would be necessary between losing or receiving an electron and that ion being stable for a monatomic ion to form. Because it produces the 3s23p1 suborbital, which also implies empty 3s23p1 orbitals and is less stable, losing the electron of the suborbital 3s23p1and gaining a charge of +3 requires less energy than gaining an electron.

Additionally, the octet rule is fullfiled.

b. an element with the valence electron configuration 3s23p3 would form a monatomic ion with a charge -3 in order to form this ion, the element will gain 3 electron into the 3p subshells.

The atom now possesses eight electrons in its valence shell, giving it the same electrical configuration as a noble gas (3s23p6) after gaining three electrons. The octet rule is satisfied and the ion is stable as a result.

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The pH of a solution can be calculated from the concentration of hydroxide ions using the formula pH = -log[H+]. In this case, the pH of the solution with an [OH-] concentration of 3.94e⁻⁵ M is approximately 9.6.

The concentration of hydroxide ions [OH-] in the solution is 3.94e⁻⁵ M.

The pH of a solution can be calculated using the formula:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in the solution. To find [H+], we can use the fact that in any aqueous solution at room temperature,

[H+][OH-] = 1.0 × 10⁻¹⁴

Rearranging this equation to solve for [H+], we get:

[H+] = 1.0 × 10⁻¹⁴ / [OH-]

Substituting the given value for [OH-], we get:

[H+] = 1.0 × 10⁻¹⁴ / 3.94e⁻⁵

[H+] = 2.54 × 10⁻¹⁰ M

Now we can use this value to calculate the pH:

pH = -log[H+]

pH = -log(2.54 × 10⁻¹⁰)

pH = 9.595

Therefore, the pH of the solution is approximately 9.6.

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Answer:

it destroy the surrounding area

Answer:

Natural Cycles

Explanation:

Most sulfur oxides are produced by burning: coal

Air pollution particles may be removed by _____. rain snow wind natural cycles

The three primary sources of air pollution are _____. factories cars electric power plants

The two basic types of air pollutants are _____. gases particulates

May I get brainliest please?

Answer:

This is called a solar eclipse

Explanation:

It's when the moon covers the sun

You could look up the 2016/2017 solar eclipse :)

Answer:

A solar eclipse happens when the moon gets in the way of the sun's light and casts its shadow on Earth. That means during the day, the moon moves over the sun i think it is cool

Explanation:hope it helps :)

The ratio of ingredients used to make broth when using water as the main liquid can vary depending on the recipe, but a common ratio is 1:10, meaning 1 part of solid ingredients to 10 parts of water.

When making broth, the ratio of ingredients is important as it affects the taste, texture, and nutritional value of the final product. The 1:10 ratio of ingredients is a starting point that can be adjusted based on personal preference.

For example, using a 1:10 ratio of ingredients means that for every 1 part of solid ingredients, such as chopped vegetables, meat, or bones, 10 parts of water are added. This can result in a light, flavorful broth. If a stronger flavor is desired, the ratio of solid ingredients can be increased, while a weaker flavor can be achieved by reducing the amount of solid ingredients.

It is also important to consider the type of ingredients used. For example, if a lot of salty ingredients are used, such as ham hocks or cured meats, the amount of water can be increased to balance out the saltiness. On the other hand, if a lot of herbs and spices are used, the water ratio can be adjusted to suit the desired taste.

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