This graph compares the rates of lymphoma, a cancer of the immune system, for people living within 50 miles of a factory that was illegally dumping hazardous wastes into local water supplies for the last 50 years to the national average for lymphoma. What conclusion can be drawn from this data? A) Few people living near the factor will get lymphoma. B) Most people living near the factory will get lymphoma. C) The chemicals illegally dumped may cause lymphoma to occur at an early age. D) The chemicals illegally dumped may cause lymphoma to occur at a higher rate.

First convert the 590.0 grams of water to liters of water.

590.0 grams x  (1 L / 1000 grams) = 0.59 L

Since we're dealing with concentration, recall this formula:

Molarity (M)  = (moles of solute) / (liters of solution)

We know the Molarity and the Liters

0.82 M = (moles) / 0.59 L

To find the moles multiply 0.59 on both sides.

The result is 0.4838 moles of CaCl (the solute).

Then change moles into grams because the question wants grams.

In order to convert the moles of a substance to grams, you will need to multiply the mole value of the substance by its molar mass which is 110.986.

(0.4838 moles CaCl2) x (110.986 g CaCl)/ 1 mol CaCl2

To produce a 0.82 m solution, dissolve 53.61 grams of anhydrous calcium chloride in 590.0 grams of water.

To solve this problem, we need to understand the concept of molarity and how to calculate the mass of a solute required to make a solution of a given molarity.

Molarity (M) is defined as the number of moles of solute (n) divided by the volume of the solution (V) in liters:

[tex]\[ M = \frac{n}{V} \][/tex]

To find the mass of the solute (m), we need to use the molar mass (Molar mass = molecular weight in g/mol) of the solute.

[tex]\[ \text{Molar mass of CaCl2} = \text{Atomic mass of Ca} + 2 \times \text{Atomic mass of Cl} \] \[ \text{Molar mass of CaCl2} = 40.08 \text{ g/mol} + 2 \times 35.45 \text{ g/mol} \] \[ \text{Molar mass of CaCl2} = 40.08 \text{ g/mol} + 70.90 \text{ g/mol} \] \[ \text{Molar mass of CaCl2} = 110.98 \text{ g/mol} \][/tex]

Now, we can rearrange the molarity equation to solve for the number of moles (n):

[tex]\[ n = M \times V \][/tex]

Now we can calculate the number of moles of CaCl2 needed for a 0.82 m solution:

[tex]\[ n = 0.82 \text{ M} \times 0.5900 \text{ L} \] \[ n = 0.4838 \text{ mol} \][/tex]

Finally, we can find the mass of CaCl₂ required by multiplying the number of moles by the molar mass:

[tex]\[ m = n \times \text{Molar mass of CaCl2} \] \[ m = 0.4838 \text{ mol} \times 110.98 \text{ g/mol} \] \[ m = 53.61 \text{ g} \][/tex]

Therefore, the mass of anhydrous calcium chloride that should be dissolved in 590.0 grams of water to produce a 0.82 m solution is approximately 53.61 grams.

Here is the complete sentence: After a rock break down, materials that are left combine with organic materials to form SOIL.

The process by which rocks are broken down is called weathering. There are different type of weathering, but the resultant effect of all of them is to break down rocks into smaller particles. The broken down particles usually combine with mineral content, moisture, gases and humus in order to form a complete soil.

The skin feels a certain sensation from outside influences. The same thing that itches also detects hot, cold and sensations of other kinds. The technical term for it is stimulation of pruriceptors. When these pruriceptors are stimulated, the brain reacts with an appropriate response.

Question : Why do we itch. Why do we react the way we do?

i would say that we would like to remove the irritant as possible and once you have scratched the area of irritation and your likely going to find some relief with your finger nail scratched away the irritant then it gets sent to your brain saying it gone and your all good.

Hopefully that helps you ! have a good day !

1) Everything is made up of atoms. 2)Atoms are indivisible and also undestroyable. 3) The combination of 2+ different kinds of atoms creates compounds 4) A chemical reaction happens when atoms are rearranged/moved around.

Dalton's atomic theory provides a basis for understanding matter at a microscopic level. This understanding aids in interpreting the differences in the three states of matter - solid, liquid, and gas. In these different states, atoms exhibit different degrees of freedom and arrangements.

The atomic theory of atoms was initially proposed by Dalton and it provides a microscopic understanding of the macroscopic properties of matter. According to Dalton's atomic theory, all matter is composed of small particles called atoms and each element has its unique type of atom. And crucially, atoms are neither created nor destroyed during a chemical change, which illustrates the principle of the law of conservation of matter.

This theory helps us understand the difference in the three states of matter (solid, liquid, and gas). In solids, atoms are tightly packed together, and have little freedom to move, resulting in a defined shape and volume. In liquids, atoms have more freedom to move but are still close together, resulting in a defined volume, but the shape of the liquid changes to fit its container. In gases, atoms have the most freedom to move and are farther apart, resulting in neither a defined shape nor volume.

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Answer:

"The cold process method" is the most popular soap making process today. Some soap makers use the hot process, which was much more significant in the past centuries. Handmade soap is technically glycerin soap and it differs from industrial soap.

Explanation: Ready-Made soap base is already soap, so all the steps necessary to producing the soap itself are eliminated. The soapmaker's concentration can be focused on the artistic, aesthetic and beneficial aspects of the soap. Also referred to as "melt and pour" or "MP" soap, ready-made soap base comes in a solid block.

Soap is made through a process called saponification, which involves the reaction between fats or oils and an alkali solution. The fats and alkali are heated together and mixed to form soap and glycerol. Fragrances and colors can be added to the soap to make it smell good.

Soap is made through a process called saponification, which involves the reaction between fats or oils and an alkali solution.

Traditionally, animal fats or plant oils were used along with a strong alkali like lye.

The fats and alkali are heated together and mixed to form soap and glycerol.

The soap is then separated and purified through filtration and washing.

Finally, fragrances and colors can be added to the soap to make it smell good.

How is the number 8.697 x 10-5 expressed in regular numerals?  C. 0.08697

B. Decomposers

Answer:

B

Explanation:

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∞ 234483279c20∞

Hey im happy to help!

Heat can float from one place to another, like all energy.Heat floats in solids by conduction, that happens because the molecules hit one another.Heat within the solid will flow from hot to cold.Heat will flow downward if its cold there.

Hope this helps, have a great rest of your day!

Answer:

Heat flows in a cycle. Heat flows downward towards cold air.

Gravity is a force that always attracts or pulls objects toward each other without direct contact or impact. Gravitational attraction depends on the mass of the two objects and the distance they are apart. Objects on Earth are pulled toward the center of Earth.

Electromagnetic waves consist of both electric and magnetic field waves. The creation of all electromagnetic waves begins with an oscillating charged particle, which creates oscillating electric and magnetic fields.

Final answer:

Electromagnetic waves consist of oscillating electric and magnetic fields, and propagate at the speed of light.

Explanation:

Electromagnetic waves consist of oscillating electric and magnetic fields. These waves propagate at the speed of light and can be described as transverse waves. They have different frequencies, wavelengths, and energies, but all travel at the same speed in a vacuum.

C. 300 N

From Newton second's Law of motion, the resultant force is directly proportional to the rate of change in momentum.

Therefore;

F = ma ; where F is the resultant force, m is the mass and a is the acceleration.

Therefore;

F = 0.06 kg × 5,000 m/s/s

  = 300 N

The net force on the arrow to the nearest newton during this acceleration is: C. 300 Newton.

Given the following data:

To determine the net force on the arrow to the nearest newton during this acceleration, we would apply Newton's Second Law of Motion:

Newton's Second Law of Motion states that the acceleration of an object or body is directly proportional to the net force acting on the object or body while being inversely proportional to its mass.

Mathematically, Newton's Second Law of Motion is given by this formula;

[tex]Net\;force = mass \times acceleration[/tex]

Substituting the given parameters into the formula, we have;

[tex]Net\;force = 0.06 \times 5000[/tex]

Net force = 300 Newton

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= 1.183 × 10^25 atoms

Volume of  a cylinder is given by the formula;

πr²h , where r is the radius, and h is the height or length.

Volume = 3.14 × 2.5² × 10

             = 196.25  cm³

But density = 2.7 g/cm³

Therefore;

Mass = volume × density

        = 196.25 × 2.7

        = 529.875 g

But; 1 atom =  4.48 x 10-23 g

Therefore;

Number of atoms = 529.875 g / 4.48 x 10-23 g

                              = 1.183 × 10^25 atoms

Answer:

1.2 x 1023 atoms

Explanation:

It is number 2.

Because an acid or base's strength refers to its degree of ionization. A strong acid will completely ionize in water while a weak acid will only partially ionize.

Therefore, whether a acid is strong or weak is based on their ionization in water. Thus, the same goes for the base.

A strong base is a base which  is completely dissociated in an aqueous solution.

Answer:

1-b, 2-b, 3-b, 4-B, 5b

Explanation:

HONORS CHEMISTRY

1. complete ionization in water

2. ionization constant

3. a god hydrogen-ion acceptor

4. weak acid

5. this base ionizes slightly in aqueous solutions

The answer would be A: Simple machines are tools that make work easier.

➷ Simple machined are tools that make work easier. Option A is correct.

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A gamma ray or gamma radiation, is a penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy

penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei

C.  

52° Celsius

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The standard value for temperature T in the Nernst equation is 25°C (298 K). This temperature is commonly used since standard-state values in thermodynamics are typically listed at this temperature.

The standard value for T in the common form of the Nernst equation is 25°C, which is equivalent to 298 K. This value is often used because most thermodynamic tables list the standard-state values at 298.15 K (or 25° C), and it's a common assumption that reactions or processes are taking place under so-called 'room temperature' conditions.

The Nernst equation itself indicates that cell potential is dependent on concentration, and it fundamentally relates the voltage of an electrochemical cell to the concentrations of reactants and products at a given temperature.

Q = 6.00 kJ

given that the heat capacity of the final solution is the same as that of pure water of equal mass.

ΔH = 468 kJ/mol.

Both answers come with three sig. fig. as in data in the question.

Final mass of the solution:

[tex]m = \text{Mass of Solution} = \text{Mass of Solute} + \text{Mass of Solvent} = 51.55 + 5.12 = 56.67\;\text{g}[/tex].

An increase in temperature by one degree celsius is the same as an increase in temperature by one degree Kelvin. Change in temperature:

[tex]\Delta T = \text{Final Temperature} - \text{Initial Temperature} = 49.8 - 24.5 = 25.3\;\text{K}[/tex].

Assume that the specific heat capacity of the NaOH solution is the same as the specific heat capacity of pure water:

[tex]c = 4.182\;\text{J}\cdot\text{g}^{-1}\cdot\text{K}^{-1}[/tex].

In other words, it takes 4.182 Joules of energy to raise the temperature of one gram of pure water by one degree Kelvin. Assume that so is the case for the NaOH solution.

Energy change:

[tex]Q = c\cdot m \cdot \Delta T = 4.182 \times 56.67 \times 25.3 = 5995.95\times 10^{3} \;\text{J} = 6.00\times 10^{3}\;\text{J}[/tex].

Refer to a periodic table for relative atomic mass:

Formula mass of NaOH:

[tex]M(\text{NaOH}) = 22.990 + 15.999 + 1.008 = 39.997\;\text{g}\cdot\text{mol}^{-1}[/tex].

How many moles of formula units in that 5.12 gram of NaOH?

[tex]\displaystyle n = \frac{m}{M} = \frac{5.12}{39.997} = 0.128010\;\text{mol}[/tex].

ΔH measures the energy change per mole of NaOH dissolved. Dissolving 5.12 grams or 0.128010 moles of NaOH releases [tex]5.99595\times 10^{3} \;\text{J}[/tex] of energy.

[tex]\displaystyle \Delta H = \frac{Q}{n} = \frac{5.99595\times 10^{3}\;\text{J}}{0.128010\;\text{mol}} = 4.68\times 10^{5}\;\text{J}\cdot\text{mol}^{-1} = 4.68\times 10^{2}\;\text{kJ}\cdot\text{mol}^{-1}[/tex].

To calculate q of the solution, use q = m × c × ΔT. To find ΔH in kJ/mol for the reaction, use ΔH = q / n.

To calculate q of the solution, we can use the equation: q = m × c × ΔT, where m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature. The specific heat capacity of water is approximately 4.18 J/g°C. First, we need to calculate the mass of the water by subtracting the mass of NaOH from the total mass. Then, we can calculate q using the equation.

To find ΔH in kJ/mol for the reaction as it occurred in the calorimeter, we can use the equation: ΔH = q / n, where n is the number of moles of NaOH. First, we need to calculate the number of moles of NaOH by dividing the mass of NaOH by its molar mass. Then, we can calculate ΔH using the equation.

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The four steps of food safety are:

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The correct answer is - subspecies.

The subspecies represents an aggregate of phenotypically similar populations of a species. They inhabit a geographic subdivision of the species. They also are differing taxonomically from the other members of the species.

The subspecies are part of a species. They are able to mate with the other members of the species without any problems if they come to a situation like that, and produce healthy offspring. In general, the subspecies is pretty much the same as the species, just that it exhibits some specific physical traits that are not found in the rest of the members of the species.

A perfect example for this is the leopard. The African leopard has short and less dense fur, is larger, lighter in coloration, while the Amur leopard has much denser and longer fur, is slightly smaller, and is darker in coloration. Both of them are part of the same species, but exhibit specific physical traits that make them a subspecies.

= 607.568 Torr

1 in of mercury is equivalent to 25.4 Torr  

Therefore;

23.92 InHg will be equal to;

23.92 × 25.4  

= 607.568 Torr

1.6218377410367840 that would be your answer but dont forget to round it to the closets number

D. evaporation and iceberg formation

because weathering rocks are mde up of salt and minerals creating iceberg formations and the evaporation density changes throughout concentration in the ocean.

Final answer:

The two factors most directly responsible for increasing the concentration of salt in the ocean are evaporation and iceberg formation. Evaporation leaves salts behind in the water, and iceberg formation concentrates salts by freezing freshwater, leaving salts in the ocean.

Explanation:

The question asks which pair of factors are most directly responsible for increasing the concentration of salt in the ocean. The correct answer is D. evaporation and iceberg formation. Evaporation of ocean water increases the salt concentration because when water evaporates, it leaves the salts behind, thus concentrating them. Iceberg formation similarly contributes to salt concentration. When sea water freezes to form icebergs, it primarily forms as freshwater ice, leaving the salts in the surrounding water, thus increasing its salinity.

Answer:

[tex]1^{f} =187.7 \frac{J}{kg}[/tex]

Explanation:

SO in order to calculate the specific latent heat of fusion, you need to remember the formula:

[tex]1^{f} =\frac{Q}{m}[/tex]

Where [tex]1^{f}[/tex] representes the specific latent heart of fusion.

[tex]Q[/tex] represents the heat energy added, usually represented in kJ

[tex]m[/tex] represents the mass of the object, in kg.

Now that we have our formula we just have to put our values into the formula:

[tex]1^{f} =\frac{Q}{m}[/tex]

[tex]1^{f} =\frac{863kJ}{4.6kg}[/tex]

[tex]1^{f} =187.7 \frac{J}{kg}[/tex]

SO our answer would be [tex]1^{f} =187.7 \frac{J}{kg}[/tex]

there's really no specific answer but mine would be...

1. how does that light show from earth?

2. will that light ever dim?

3. are some stars bright but just not bright enough that we can see?

How many stars are in space?

How far away from Earth are certain stars?

Are there other planets like Earth?

The universe is everything. It includes all of space and all the matter and energy that space contains.

Three questions are:

Learn more about the universe here:

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H2O -Bronsted Acid

                 B (aq) + H2O (l) → BH+ (aq) + OH– (aq)

          That is; Base + Acid will give a conjugate acid + hydroxide ion

In the gender reaction water acts as the Bronsted acid because it donates a proton to the nitrite ion which in turn acts as the Bronsted base.

In the given equation NO2- + H2O -> HNO2 + OH-, the Bronsted acid is H2O. According to the Bronsted-Lowry definition an acid is a substance that can donate a proton (H+), and a base is a substance that can accept a proton. In this reaction water (H2O) donates a proton to the nitrite ion (NO2-) and hence it is the Bronsted acid. The nitrite ion is the Bronsted base because it accepts a proton from water to form nitrous acid (HNO2).

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When equal forces from opposite directions act on an object, they are said to be balanced. Such a state doesn't change the motion of the object, which aligns with Newton's First Law of Motion or The Law of Inertia.

Balanced forces occur when the total force applied to an object from one direction equates to the total force applying from the opposite direction. Hence, the object will remain still or continue moving at a constant speed in a straight line. It's important to note that under balanced forces, the motion state of the object doesn't change, also known as Newton's First Law of Motion or The Law of Inertia.

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