Calculate the volume of 0.5 M sodium phosphate needed to react with Cu(NO3)2 (aq) in a Copper Cycle that starts with 0.636 grams of Cu(s). Enter your answer here Upload a photo of your calculations: Please select file(s) Select file(s)

Answer:

First answer is correct, please let me know if you need any help though!

the answer is electrons

A boulder sits at rest on top of a mountain. What conclusion can be made about the forces acting on the boulder? The forces acting on the boulder are balanced (net force equals zero).

If a boulder sits at rest on the top of the mountain , the forces acting on the boulder are zero as it is in the state of rest.

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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The half-life of a radioactive parent isotope is defined as the time it takes for half of the parent isotope to decay.

The half-life of a radioactive parent isotope is defined as the time it takes for half of the parent isotope to decay. It is a measure of the stability of a radioactive isotope and is used to predict how long it will take for half of the radioactive atoms in a sample to decay.

This can be used to estimate the age of a sample or to determine how long a specific isotope will remain dangerous. The half-life of a radioactive isotope is a constant and is specific to that isotope. It is not affected by temperature, pressure, or chemical environment. The half-life of a radioactive isotope can range from fractions of a second to billions of years.

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Your question seems incomplete, but I assume the question was:

"How is the half-life of a radioactive parent isotope defined? (group of answer choices)

The time it takes for half of the parent isotope to decay.

Half the time it takes for the parent isotope to completely decay.

The time it takes the parent isotope to go through half the decay steps necessary to produce a stable daughter isotope.

Half of the average rate of decay of the parent isotope."  

Answer: 20 g

Explanation: heat received Q = m c dT

Q= 50J , dT= 25 C anc c= 0.10 J / g C

And m = Q / c dT

The mass of the iron sample that received the heat is determined as 20 g.

The mass of the iron sample is calculated as follows;

Q = mcΔT

where;

m = Q/cΔT

m = (50) / (0.1 x 25)

m = 20 g

Thus, the mass of the iron sample that received the heat is determined as 20 g.

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The rate at which it grows in nanometers per second is 9.19 nm/s.

A filamentous biomaterial, hair is primarily made of proteins, particularly keratin. Dermal follicles produce the protein filament known as hair. Animals can be identified in part by their hair. The human body is covered in follicles that generate thick terminal and fine vellus hair, with the exception of regions of glabrous skin. A healthy head of hair offers some warmth and ultraviolet radiation defence.

The given hair growth rate is 1/32 inch per day.

We must determine the growth rate in nanometers per second.

We know that

1 inch= 2.54x10-⁷ nm

1 day= 86400 s

Using the formula

1/32 inch / day= 1×2.54×10-⁷/32×86400

1/32 inch/day = 9.19 nm/s.

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Answer:

one end is the north pole and the other is the south pole.

Explanation:

a north pole will attract a south pole; the magnets pull on each other. But the two north poles will push each other away. ... A compass is a tiny magnet balanced on a point so it can turn freely.

Answer:

The answer is the 2nd one down: The green house affect

Answer: Sodium is made up of lots of salt.

Explanation:

Eating a lot of salt can cause your body to retain more water, which can show up on the scale as extra pounds. But we're not just talking about water weight here. High salt diets appear to be linked to higher body fat in particular, the kind of fat that accumulates around your middle.

The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.

The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)

Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)

Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

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Answer:

\(Q=20.6\frac{J}{g}\)

Explanation:

Hello there!

In this case, according to the equation for the calculation of the heat during a heating process:

\(Q=mC(T_f-T_i)\)

It is possible to compute it per gram of ice by just removing m from the equation by dividing at both sides. Next we plug in the given specific heat and the final and initial temperatures to obtain:

\(Q=2.06\frac{J}{g\°C}[-15\°C-(-25\°C)] \\\\Q=20.6\frac{J}{g}\)

Best regards!

Answer:

50°F,  70°F

Explanation:

Answer:

50 and 70 degrees F

Explanation:

got it right on the quiz on edge

Answer:The term "symbiosis" includes a broad range of species interactions but typically refers to three major types: mutualism, commensalism and parasitism. Mutualism is a symbiotic interaction where both or all individuals benefit from the relationship.

Explanation:

Answer:

Explanation:

I'll answer question 3 for you.   But just ask one question at a time.

it's really not fair to ask a bunch of questions.

so for 3 we know it's hydroCarbons.   or \(H_{2}\)    b/c of how Hydrogen is diatomic, C , for Carbon.    Next, we know 8 Carbon atoms have attached themselves.  so do you happen to know the Lewis diagram for Hydrogen and Carbon?  look it up if not.   so we know Carbon is 6 on the periodic chart,  so it's normally got 6 electrons.   I mentioned Lewis structures b/c now you have to picture how the electrons are going to "stick"  the atoms together.   Recall they like to be in groups of 8  :P  so the diatomic Hydrogen is going to stick to one Carbon atom well.  Also, Hydrogen is never the central atom,  it just "hangs around"  :DD    , so I added a picture of the Lewis structure for  8 carbon atoms,   but, you can see there are double bond connections and the question you asked doesn't say if those are allowed.  I feel like the professor has misguided you in this question.  b/c  HydroCarbons come in a big variety of complex connections,  so almost any answer would be correct.   but probably 16 is good.  but that's not even an option.   Maybe they just want you to recognize that Hydrogen is diatomic and comes in twos.   so maybe 10 is the best answer.  or   A)

The first step in this calculation is to know how many liters is equal to 1 gallon, and the value is 3.785 liters, so now we have to make the following calculation:

1 gal = 3.785 Liters

30.0 gal = x Liters

x = 3.785 * 30.0

x = 114 Liters

Answer:

Even though plants are rooted in the ground, they still move, exert force, and do work.

Plant cells have very strong cell walls that allow pressure to build up inside of the cell as water is absorbed. This pressure is called turgor.

When turgor pressure is high enough in a cell, the cell walls become firm and as a result, the cell becomes rigid and the plant is able to stand tall and straight.

When a plant does not get enough water, the turgor pressure inside of the cells decreases. A decrease in pressure pushing against the cell wall causes the cells to lose their shape and shrink. This causes the plant to begin to droop or wilt.

When the wilted plant gets enough water, the cells will become rigid again, and the plant will stand firm and straight once again.

Explanation:

It will decrease by about one tenth of the original pressure..

The volume of gas inside a receptacle affects the pressure inside of it. Using a hand pump to inflate the ball more, the official can correct the problem if the basketball doesn't rebound high enough. He could also let some air out of the ball if it rebounds too high.

Gas pressure-affecting variables

As you may recall from the kinetic-molecular theory, gas particles travel randomly and in straight lines up until an elastic collision occurs with either other gas particles or one of the container walls. The pressure of the gas is determined by these encounters with the container's sides. The state of a gas is described using four factors. They are volume and gravity.

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Answer:

P2 = 1.94 kPa

Explanation:

Given the following data;

Initial pressure = 2.36 kPa

Initial temperature = 62°C

Standard temperature = 0°C

Conversion:

Kelvin = 273 + C

Kelvin = 273 + 62 = 335 K

Kelvin = 273 + 0 = 273 K

To find the final pressure, we would use Gay Lussac's law;

Gay Lussac states that when the volume of an ideal gas is kept constant, the pressure of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Gay Lussac's law is given by;

\( PT = K\)

\( \frac{P1}{T1} = \frac{P2}{T2}\)

Making P2 as the subject formula, we have;

\( P_{2}= \frac{P1}{T1} * T_{2}\)

\( P_{2}= \frac{2.36}{335} * 273 \)

\( P_{2}= 0.0071 * 273 \)

P2 = 1.94 kPa

this reaction, which has a kp of 76.7 under certain conditions. co(g) h2o(g) co2(g) h2(g) if the initial pressure of co is 0.415 atm and the initial pressure of h2o is 0.415 atm, is \(7.34 \text { atm. }\)

What is pressure?

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.

Let \($\mathrm{x}$\) atm be the equilibrium partial pressure of water vapor.

The equilibrium partial pressure of \($\mathrm{CO}$\) will also be \($\mathrm{x}$\) atm.

The equilibrium partial pressures of \($\mathrm{H}_2$\) and \($\mathrm{CO}_2$\) will be\(10-\mathrm{x} \text\) { atm and } \(20-\mathrm{x}\) atm and \($20-\mathrm{x}\)  atm respectively.

\(\text { The equilibrium constant expression is } \mathrm{K}_{\mathrm{p}}\)\(=\frac{\mathrm{P}_{\mathrm{H}_2 \mathrm{O}} \mathrm{P}_{\mathrm{CO}}}{\mathrm{P}_{\mathrm{H}_2} \mathrm{P}_{\mathrm{CO}}}\)

\(\begin{aligned}& 1.60=\frac{\mathrm{x} \times \mathrm{x}}{(10-\mathrm{x}) \times(20-\mathrm{x})} \\& 0.625 \mathrm{x}^2=200-10 \mathrm{x}-20 \mathrm{x}+\mathrm{x}^2 \\& 0.375 \mathrm{x}^2-30 \mathrm{x}+200=0 \\& \mathrm{x}=72.7 \text { or } \mathrm{x}=7.34\end{aligned}\)

The value \($72.7$\) is discarded as the equilibrium partial pressure of hydrogen cannot be negative.

\($$[10-x=10-72.7 < 0]$$\)

\(\text { Hence, the partial pressure of water vapour at equilibrium is } 7.34 \mathrm{~atm} \text {. }\)

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Answer:

It would be Container 3

Explanation:

Each of the containers has the same amount of salt.  Salinity refers to salt level.  Since the question is asking for the container with the greatest salinity, you are looking for the container with the least water (because it will be the saltiest out of all of them).  Container 3 has the least water.

Hope this helps :)

3 has less water so its saltier

The pressure and the internal energy of the refrigerant at the final state

Known data:80.74kJ/kg.

\($$\begin{aligned}& \mathrm{R}-134 \mathrm{a} \\& P_1=800 \mathrm{kPa} \\& T_1=25^{\circ} \mathrm{C}\end{aligned}$$\)

Unknowns:

\($$\begin{aligned}& T_2=? \\& u_2=?\end{aligned}$$\)

The pressure of the refrigerant in the final state is equal to the saturation pressure at -20 degrees Celsius.

\($$\begin{aligned}& P_2=P_{\text {sat }, \text { at }-20^{\circ} \mathrm{C}}=132.82 \mathrm{kPa} \\& P_2=132.82 \mathrm{kPa}\end{aligned}$$\)

State 1 is compressed liquid. Then the enthalpy is that of the saturated liquid at 25 degrees Celsius.

\(\h_1=h_{f, \text { at } 25^{\circ} \mathrm{C}}=86.405 \mathrm{~kJ} / \mathrm{kg}$$\)

The throttling process of the refrigerant is isentalpic. The state 2 of the refrigerant is in the phase mixing region, so we have to calculate the quality 2.

\(x_2=\left(h_2-h_f\right) /\left(h_g-h_f\right)$$\)

Where:

\($$\begin{aligned}h_2 & =h_1=86.405 \mathrm{~kJ} / \mathrm{kg} \\h_f & =25.49 \mathrm{~kJ} / \mathrm{kg} \\h_g & =238.4 \mathrm{~kJ} / \mathrm{kg}\end{aligned}$$\)\($$\begin{aligned}h_2 & =h_1=86.405 \mathrm{~kJ} / \mathrm{kg} \\h_f & =25.49 \mathrm{~kJ} / \mathrm{kg} \\h_g & =238.4 \mathrm{~kJ} / \mathrm{kg}\end{aligned}$$\)

Substituting:

\(x_2=(86.405-25.49) /(238.4-25.49)=0.2861$$\)

Now let's calculate the final internal energy of the refrigerant, remembering that the temperature is -\($20 \mathrm{C}$\).

\(u_2=u_f+x_2\left(u_g-u_f\right)$$\)

Where :

\($$\begin{aligned}& u_f=25.39 \mathrm{~kJ} / \mathrm{kg} \\& u_g=218.34 \mathrm{~kJ} / \mathrm{kg}\end{aligned}$$\)

Substituting :

\($$u_2=25.39+0.2861(218.84-25.39)=80.74 k J / k g$$\)

\($$u_2=80.74 \mathrm{~kJ} / \mathrm{kg}$$\)

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However, I can provide a written reaction scheme and mechanism for the reactions involved.  

Reaction scheme:

Synthesis of Benzimidazole:

O-phenylenediamine + formic acid → benzimidazole + water

Formation of C14H12N2:

Benzimidazole + nBuLi → intermediate A

Intermediate A + PhCH2Br → C14H12N2 + LiBr

Mechanism:

Synthesis of Benzimidazole:

The reaction between O-phenylenediamine and formic acid is an acid-catalyzed condensation reaction, which proceeds through a series of proton transfers and dehydration steps to yield benzimidazole and water.

Formation of C14H12N2:

The first step involves the deprotonation of the imidazole ring in benzimidazole by nBuLi to generate an intermediate A. The intermediate A is then attacked by the benzyl bromide at the benzylic carbon, which leads to the formation of a new carbon-carbon bond and elimination of the lithium bromide (LiBr) leaving group. The final product is C14H12N2.

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Answer: nervous tissue to allow heart

epithelial to transmits

connective to forms like

muscle tissue to support bone

Explanation:

king_n1886        

Answer:

Atoms of the same element always have the same number of protons, same Z, but often have different numbers of neutrons, therefore, different mass numbers.

As water changes phase from a solid to a liquid, the particles gain energy, vibrate more vigorously, and break free from their fixed positions. When water changes phase from a liquid to a gas, the particles gain even more energy, move more rapidly, and some of them escape into the air as water vapor.

According to the particle theory of matter, all substances are made up of tiny particles called atoms or molecules. These particles are constantly in motion and have spaces between them. The behavior of these particles explains the changes in phase that water undergoes as it transitions from a solid to a liquid and finally to a gas.

Solid to Liquid (Melting):

When water is in its solid phase, the particles are closely packed and have a fixed arrangement. They vibrate in their positions but cannot move freely. As heat is added to the solid water (ice), the particles gain energy and their vibrations become more vigorous. Eventually, the energy is sufficient to overcome the attractive forces between the particles, causing the solid to melt into a liquid. In the liquid phase, the particles are still close together, but they can now move past each other. The increased energy allows the particles to break free from their fixed positions and move more freely.

Liquid to Gas (Evaporation/Vaporization):

As heat is further added to the liquid water, the particles gain more energy and move even more rapidly. Some of the particles at the surface of the liquid gain enough energy to break away from the attractive forces of neighboring particles and escape into the air. This process is known as evaporation or vaporization. The particles that have evaporated become water vapor or gaseous water molecules. Inside the liquid, the remaining particles continue to move and collide with each other. This constant motion and collision transfer energy throughout the liquid, leading to continuous evaporation until all the liquid is converted to gas.

In summary, as water changes phase from a solid to a liquid, the particles gain energy, vibrate more vigorously, and break free from their fixed positions. When water changes phase from a liquid to a gas, the particles gain even more energy, move more rapidly, and some of them escape into the air as water vapor. The behavior of these particles, their motion, and the energy they possess determine the different physical states of water.

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Answer:

30 g

Explanation:

According to Mendeleev's theory, the total mass of the reactants and products are the same.

The balloon's new volume is 24.6L. An arctic weather balloon being inflated using 24.6 litres of helium gas in a prep shed. The shed is seven degrees Celsius inside.

When the balloon is hauled outside, it is seven degrees Celsius outside. Any three-dimensional solid's volume is equal to how much room it occupies. One of these solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Chemical compounds are composed of a large number of comparable molecules (or molecular entities), which are composed of atoms from various elements bonded together by chemical bonds. Because of this, a molecule composed of atoms from a single element is not a compound.

v1/t1 = v2/t2

24.6/7 = v2/7

v2 = 24.6L

v1 = v2

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Answer

To convert μg/l to mol/kg?

Step 1: from the mass in grams, find the number of moles by diving the mass by its molar mass

Step 2: To go from L to kg, take the volume given multiply it by density in kg/L