Which statement is true about the law of reflection?
Group of answer choices

The angle of reflected light is larger than the incoming angle of light.

The angle of reflected light distorts the image to appear larger or smaller.

The angle of reflected light is smaller than the incoming angle of light.

The angle of reflected light is the same as the incoming angle of light.

plssssssssssssssssssss HELP

The empirical formula for the compound containing carbon, hydrogen, and oxygen in the ratio 14 : 42 : 84 is CH₃O₆ (option E)

The following data were obtained from the question:

Empirical formula of a compound is the simplest formula of a compound showing the whole number ratios of the various elements present in the compound.

Now, we shall obtain the empirical formula as follow:

Divide by the smallest

C = 14 / 14 = 1

H = 42 / 14 = 3

O = 84 / 14 = 6

Thus, the empirical formula is CH₃O₆ (option E)

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Fossil fuels are essential part of the power generation in the world. They are easily combustible and more reliable and cheaper. However, the burning of fossil fuels releases toxic gases  to the environment.

Fossil fuels are fuel generated from the decomposition materials. Petroleum, coal, natural gas  etc. are fossil fuels which are excavating from the earth.

Fossil fuels are non-renewable sources of energy. Hence, as the existing fossil sources are exhausted no more fossil fuel can be made. It is cheaper, reliable and easy to use.

However, the toxic hydrocarbon gases released from the burning of fossil fuels make the environment polluted. Therefore, overuse of fossil fuel definitely rise the atmospheric pollution.

Its use over the next 50 years, will increase the global warming and more of it will be exhausted.

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The weather condition is NOT associated with warm fronts is: "warm fronts typically produce more violent weather than cold front" (Option A)

This is because, quite to the contrary, warm fronts are less likely to create violent weather than cold fronts. Warm fronts are connected with gradual ascension zones (i.e. stratiform clouds and precipitation).

Clouds and precipitation are common ahead of the warm front. Warm fronts travel far more slowly than cold fronts.

Weather fronts frequently indicate the type of weather that is on its way: Cold fronts, for example, provide heavier, denser air that pushes beneath the lighter warm front.

Winds grow gusty as the cold front passes. There is a sharp drop in temperature, as well as heavy rain, occasionally accompanied by hail, thunder, and lighting.

Cold fronts produce the most common type of cloud, cumulus clouds. They frequently develop into cumulonimbus clouds, which cause thunderstorms. Nimbostratus, stratocumulus, and stratus clouds can also be produced by cold fronts.

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Answer:

the first hill of the roller coaster

Explanation:

The first hill of a roller coaster is always the highest point of the roller coaster because friction and drag immediately begin robbing the car of energy. At the top of the first hill, a car's energy is almost entirely gravitational potential energy (because its velocity is zero or almost zero).

Answer:

top of the hill

Explanation:

The helium tank has a pressure of 650 torr at 25 degree Celsius and when the temperature is tripled, the pressure will be approximately 1945.71 torr

To find the new pressure when the temperature is tripled, we can use the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature when the volume and the number of particles remain constant. The ideal gas law is given by the equation:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to convert the initial temperature of 25 degrees Celsius to Kelvin. Adding 273.15 to the Celsius temperature gives us 298.15 K.

Let's assume that the volume, number of moles, and the gas constant remain constant.

If the temperature is tripled, the new temperature would be 3 times the initial temperature, which is 3 * 298.15 K = 894.45 K.

Now, we can set up a proportion to find the new pressure:

P1 / T1 = P2 / T2

Solving for P2 (the new pressure), we get:

P2 = (P1 * T2) / T1

Plugging in the values, we have:

P2 = (650 torr * 894.45 K) / 298.15 K

Calculating this expression, we find:

P2 ≈ 1945.71 torr

Therefore, when the temperature is tripled, the pressure will be approximately 1945.71 torr.

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The specific heat of the solid is 4.2 J/g/°C and the specific heat of the liquid is 36.3 J/g/°C.

In this case, we know that the mass of the solid is 9.80 g, the change in temperature is 235 °C, and the heat added is 10,000 J. We can solve for the specific heat of the solid as follows:

c = Q / m ΔT

= 10,000 J / 9.80 g / 235 °C

= 4.2 J/g/°C

The latent heat of fusion for the unknown material is 334 J/g. We can now calculate the heat required to melt the solid as follows:

Q = mLf

= 9.80 g * 334 J/g

= 32,832 J

The total heat added to the liquid is 10,000 J + 32,832 J = 42,832 J. The change in temperature of the liquid is 235 °C - 20 °C = 115 °C. We can now calculate the specific heat of the liquid as follows:

c = Q / m ΔT

= 42,832 J / 9.80 g / 115 °C

= 36.3 J/g/°C

Therefore, the specific heat of the solid is 4.2 J/g/°C and the specific heat of the liquid is 36.3 J/g/°C.

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An experiment is performed on an unknown material and produces the given heat curve. The temperature of the material is shown as a function of heat added. Other experiments determine that the material has a temperature of fusion of fusion=235 °C and a temperature of vaporization of vapor=471 °C.

If the sample of material has a mass of =9.80 g, calculate the specific heat when this material is a solid, s, and when it is liquid, l.

The center of gravity is the same for all passenger vehicles no it is different

The center gravity is the point through which the force of gravity acts on an object or system then in the mechanics problem the gravitational field is assumed to be uniform and the center of gravity is then in exactly the same position as the center of mass and the the center of gravity is the same for all passenger vehicles no it is different because the thermotical point where the sum of all of the masses of each of its individual components effectively act and the center of gravity is low then the stability of vehicle and passenger are more

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Answer:

Explanation:

m= 80.0 g

Cp=0.8 J/gc

Change in T= 25

q=Cp X m X T  =0.8 X 80.0 X 25 =1600J

Postive q or enthalpy makes it endothermic.

Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the  pH of a 0.01 M acetic acid.

Any hydrogen that comprises a material capable of giving a proton (a hydrogen ion) to another chemical is defined as acid. A base is indeed a molecule or ion that can receive a hydronium ion from just an acid.

1)Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. The pH value of stronger acid is lower.

2)CH\(_3\)COOH + H\(_2\)O  ⇄ CH\(_3\)COO⁻+  H\(_3\)O⁺

 0.01             0               0

 -x              +x                +x

 0.01-x           +x        +x

Ka=[ CH\(_3\)COO⁻][H\(_3\)O⁺]/[CH\(_3\)COOH]

1.8×10⁻⁵ = [x][x ]/[  0.01-x ]

x=1.34×10⁻³

pH = -log[H⁺]

     =  -log[1.34×10⁻³]

     =2.88

Therefore, because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the   pH of a 0.01 M acetic acid.

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Answer:

tectonic plates

Explanation:

Answer:

Warm front

Explanation:

Warm front forms widespread clouds, rain, or snow.

Answer:

Warm front

Explanation:

Just took the quiz

Answer:it is 3 just look at the middle numbers

Explanation:

add it up maybe?

Explanation:

The atomic mass of any element can be easily determined with the help of the number of protons and neutrons. You are simply required to add the number of neutrons and protons in order to estimate the atomic mass of any element.

The Atomic mass of an element may be defined as the average mass of the atoms of an element that are significantly measured in the atomic mass unit (amu).

Another method through which you can approximate the value of the atomic mass of any element is that you are simply required to double the value of the atomic number that is known for each specific element.

For example, The atomic number of oxygen is 8, while its atomic mass is 8 × 2 = 16. Similarly, the atomic number of nitrogen is 7, while its atomic mass is 7 × 2 = 14.

Therefore, it is well described above.

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The percent yield of the reaction when 3.85g of Ammonia reacts with 5.78g of O2 to give out 0.750L of nitrogen is 27.43%

It is given that the mass of Ammonia is 3.85g and the mass of Oxygen is 5.78g. The yield of Nitrogen is 0.750L. To find the percent yield, we need to know the number of moles of ammonia and Oxygen.

No of moles of Oxygen =  5.78/31.99

No moles of Oxygen= 0.181 mol of O2.

No. of moles of Ammonia = 3.85/17.03

                                             = 0.226 mol of NH₃

It can be seen that 0.226 mol of NH₃ reacts with 3/4th of 0.226 mol of O₂ which is 0.1695 mol of O₂.

But the given moles of O₂ are more than that of the required value. Therefore, NH₃ is the limiting reactant and O₂ is the excess.

Therefore,

0.226 mol of NH3 x 2 mol of N₂/ 4 mol of NH3

= 0.113 mol of N₂

Experimentally it would be calculated as

n = PV/RT

n =  (1 x 0.750)/(0.0821x295)

n = 0.031 mol of N₂

Percent yield = Experimental yield/theoretical yield x 100

Percent yield= (0.031/0.113)x100

Percent yield= 27.43%

Therefore, the percent yield of N₂ is 27.43%

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The ionic and net ionic equation for HCl + Mg(C2H3O2)2 ⇒ MgCl2 + HC2H3O2 is H⁺ + Cl⁻ + Mg⁺ + C₂H₃O₂⁻ → Mg⁺ + Cl₂⁻ +  H⁺ + C₂H₃O₂⁻.

Ionic equations are chemical equations that only show the ions involved in a chemical reaction. In other words, ions that combine in solution to form new substances. The ions that do not participate are referred to as spectator ions.

A net ionic equation depicts only the chemical species involved in a reaction, whereas a complete ionic equation depicts the spectator ions as well.

Thus,  H⁺ + Cl⁻ + Mg⁺ + C₂H₃O₂⁻ → Mg⁺ + Cl₂⁻ +  H⁺ + C₂H₃O₂⁻ this is the net ionic equation.

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1. The molarity of the solution is 7.78 M. 2. There are 0.109 moles of sodium nitrate in 0.33 L of a 0.33 M solution.

2. We are given 3.5 moles of potassium nitrate in 450 mL of solution. To find molarity, we need to convert mL to L:

450 mL = 0.45 L

Then we can use formula:

Molarity = moles of solute/liters of solution

Molarity = 3.5 moles / 0.45 L= 7.78 M

2. We are given volume of 0.33 L and a molarity of 0.33 M for sodium nitrate. To find the number of moles of sodium nitrate, using:

moles of solute = molarity x liters of solution

moles of solute = 0.33 M x 0.33 L  = 0.109 moles

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--The complete Question is 1. What is the molarity of a 450 mL solution containing 3.5 moles of potassium nitrate?

2. How many moles of sodium nitrate are in 0.33 L of a 0.33 M solution? --

The footage shown at the start of the documentary is dated April 25, 2014.

On this date, the city of Flint, Michigan switched its water source from Lake Huron to the Flint River as a cost-saving measure.

The switch was made from Lake Huron as a water source to the Flint River because the city was under the control of a state-appointed emergency manager who was looking for ways to cut costs.

Using the Flint River as a water source was seen as a cheaper alternative to purchasing water from Detroit, which had been supplying the city with Lake Huron water.

After the water switch, residents began to notice strange smells, colors, and tastes in their tap water. Some also experienced rashes, hair loss, and other health problems. There were reports of lead contamination and outbreaks of Legionnaires' disease.

The general steps taken in treating river water include screening, coagulation and flocculation, sedimentation, filtration, disinfection, and distribution. The water is screened to remove large debris and then treated with chemicals to make small particles stick together, forming larger clumps that can be easily removed. The water is then allowed to settle, and the clear water is filtered and disinfected with chlorine or other chemicals to kill any remaining bacteria or viruses.

The pathogen found in the Flint water supply was the bacteria Legionella, which causes Legionnaires' disease. Legionella is commonly found in freshwater environments, such as lakes and rivers, and can grow in water systems that are not properly maintained or treated.

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Answer:

a) He

Explanation:

The formula of average velocity of a gas, v, is:

\(v = \sqrt{\frac{8RT}{pi*M} }\)

Where R is gas constant, T is temperature and M is molecular mass of the gas.

As you can see in the formula, the gas with the lowest molecular mass will be the gas with highest average velocity.

Molecular mass of He is 2g/mol; Cl₂ = 70g/mol; NH₃ = 17g/mol.

That means the gas with the highest average velocity is:

The gas that has the highest average velocity is He.

According to the kinetic theory of gases, gas molecules are in constant random motion. The average velocity of a gas sample is inversely proportional to its molar mass but directly proportional to its absolute temperature.

At the same temperature, the average velocity of gases depends on the molar mass. The gas that has the lowest molar mass will have the highest average speed.

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When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

Answer:

Infer and form a hypothesis

Answer:

The two mistakes made by the student are: 1) they used the term "element" instead of the term "substance"; and 2) they stated that one gaseous chlorine molecule was combined with the zinc, when actually two molecules of chlorine gas were combined with the zinc. The student can fix these mistakes by using the term "substance" instead of "element" and by stating that two molecules of chlorine gas were used in combination with the zinc.

Answer: A LOWER ENERGY

Explanation:

did the test

Answer:

A lower energy!

Explanation:

I know this is not much of an explanation but I took the test i hope you have an amazing day afternoon or night! Hope this helps :3

Answer:

4.002602

Explanation:

Seems Am Converting Between Grams Helium And Mole.

Amobarbital (like all barbiturates) works by being incontestible to the GABAA receptor at either the alpha or the beta subunit.

Amobarbital (like all barbiturates) works by binding to the GABAA receptor at either the alpha or the beta subunit. These are compulsory sites that are distinct from GABA itself and also distinct from the benzodiazepine binding site.

Amobarbital is a barbiturate classified as having a halfway duration of action, meaning that the effects of the drug can last from 4-6 amobarbital increases the effects of benazepril by apparatus: pharmacodynamic synergism.

So we can conclude that Amobarbital, 5-ethyl-5-isoamyl barbituric acid like all barbiturates.

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Answer:

tendency of molecules with unlike electrical charges to attract each other.

Explanation:

If the MDS (Minimum Data Set) is successfully implemented, several positive outcomes can be expected. The MDS is a standardized assessment tool used in healthcare settings to evaluate the physical, mental, and psychosocial well-being of patients.

Its successful implementation can lead to improved patient care, more efficient resource allocation, and enhanced data analysis.With the MDS in place, healthcare providers can gather consistent and comprehensive data about patients, enabling better understanding of their needs and tailoring of individualized care plans.

This can result in improved treatment outcomes and patient satisfaction. Additionally, the MDS facilitates effective communication and information sharing among healthcare professionals, leading to coordinated care and reduced errors.From a broader perspective, successful implementation of the MDS allows for accurate and reliable data collection, enabling robust research and evidence-based decision-making.

This can contribute to advancements in healthcare practices, policy development, and quality improvement initiatives. Ultimately, the successful implementation of the MDS can enhance patient outcomes, improve healthcare delivery, and drive positive changes in the healthcare system as a whole.

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Answer:

pH = 11.3

Explanation:

From the question given above, the following data were obtained:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

pH =.?

The pH of a solution is defined by the following equation:

pH = –Log [H₃O⁺]

Thus, with the above formula, we can obtain the pH of the solution as follow:

Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M

pH =.?

pH = –Log [H₃O⁺]

pH = –Log 4.950×10¯¹²

pH = 11.3

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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