what should you do if you spill sulfuric acid on your hand?

Answer:

its B

Explanation:

a p e x

Answer:

the answer is b. allows electricity to flow easily

Surely, when there is a decrease in temperature accompanying a chemical reaction, this indicates that: energy was absorbed.

The correct answer choice is option d.

In happens that in a chemical reaction which leads to the absorption of energy due to decrease in temperature, this results as a result of the fact that bonds in the reactants of the reaction are broken than it is released

So therefore, we can now deduce and confirm from the explanation given above that it is an endothermic reaction when energy is absorbed by the system.

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Answer:

627.6

Explanation:

150 x 4.184 = 627.6

Remember:

calories multiplied by 4.184

Explanation:

To find the freezing point of the solution, we can use the freezing point depression equation:

ΔT = Kᵣ x m

Where ΔT is the change in freezing point, Kᵣ is the freezing point depression constant of benzene, and m is the molality of the solution.

Substituting the values from the problem, we get:

ΔT = 5.12 °C/m x 2.8 m

ΔT = 14.34 °C

Since ΔT = Tᵢ - T, where Tᵢ is the freezing point of the solvent (benzene) and T is the freezing point of the solution, we can rearrange the equation to solve for T:

T = Tᵢ - ΔT

T = 5.50 °C - 14.34 °C

T = -8.84 °C

Therefore, the freezing point of the solution is -8.84 °C.

Answer:The freezing point of the solution is -8.84 °C.

Explanation:

From the calculations below the quantity of heat absorbed is 74789 joules

We know that the expression for the quantity of heat is given as

Q = MCΔT --------------------1

Substituting our given data into the expression we have

Q = 325*4.184(70-15)

Q = 325*4.184(55)

Q = 74,789 Joules

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The offered sentence describes the exothermic change in energy as "freezing."

A reaction is deemed to be exothermic if it produces heat while also undergoing a net decrease in standard ∆h. Examples provide any type of flame, iron rusting, and water freezes. Exothermic processes are those that discharge heat and energy into the surrounding environment.

Exothermic refers to chemical reactions which release energy. When bonds are created in the products of exothermic processes, more energy is produced than is required to break bonds between the reactants. Endothermic refers to chemical reactions that either use or absorb photons.

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i think its 50% bc its half of the box

Answer:

100%

Explanation:

The temperature along the H-R-x-axis. A's Growing from left to right.

Moreover, the temperature can be seen to drop as one moves further to the right along the x-axis. Moreover, the H-R diagram can be broadly divided into four quadrants. The stars in the top-left quadrant are warm and brilliant, while those in the top-right quadrant are cool and bright.

If you can interpret what each axis in the HR diagram implies, it's really simple to understand. The star's surface temperature is measured along the horizontal axis in Kelvin. The stars on the right are significantly cooler and redder in hue than the stars on the left, and they are 3000 Kelvin in temperature.

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The molecule ammonium lauryl sulfate is a detergent because of its hydrophobic tail and a hydrophilic head which are responsible for its cleansing action.

Though not shown, I presume that the property labelled as C must have to do with the cleasing action of the molecule ammonium lauryl sulfate.

The substance has a hydrophobic tail and a hydrophilic head which enables it to form miscles and these are the responsible for the cleansing action of the ammonium lauryl sulfate molecule.

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore the volume of carbon dioxide gas produced is 6,260.1L. Ideal gas is a hypothetical gas.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically,

PV=nRT

where,

P = pressure= 1 atm

V= volume=?

n =number of moles=given mass/molar mass

                                 =5000/44.10

                                  =113.3 moles

T =temperature = 673 K

R = Gas constant = 0.0821 L.atm/K.mol

1  × V=113.3× 0.0821 L.atm/K.mol × 673

V=6,260.1L

Therefore the volume of carbon dioxide gas produced is 6,260.1L.

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We need to balance because according to law of conservation of mass

So

We cannot change the subscripts as we can't change the chemical formula.

the balanced equation for this is

2Fe + 3H2SO4 → Fe2(SO4) + 3H2

It's necessary to balance chemical equations because the product has to be the same mass as the elements before the chemical reaction. To balance the equation, coefficients can be added to even the amount of atoms on each side, but changing subscripts results in changing the substance entirely, so you can't

In this lab, a hydrometer is used to measure the density of sugar solutions. If the same hydrometer was used to measure the density of alcohol solutions, you would likely observe different readings due to the differences in density between sugar and alcohol solutions.

Here's a step-by-step explanation:

1. A hydrometer works by floating in a liquid and measuring the liquid's density based on the level at which it floats. The higher it floats, the lower the liquid's density, and vice versa.
2. Sugar solutions generally have a higher density than water because sugar molecules are dissolved in the water, increasing the overall mass per unit volume.
3. Alcohol solutions, on the other hand, usually have a lower density than water. This is because alcohol molecules are less dense than water molecules, resulting in a lower overall mass per unit volume when mixed with water.
4. When using the same hydrometer to measure the density of alcohol solutions, it would likely float higher in the alcohol solution compared to the sugar solution, indicating the lower density of the alcohol solution.

In summary, if the same hydrometer was used to measure the density of alcohol solutions, it would provide different readings compared to measuring sugar solutions, reflecting the differences in density between the two types of solutions.

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Answer:

If you increase temperature, you increase entropy. (1) More energy put into a system excites the molecules and the amount of random activity. (2) As a gas expands in a system, entropy increases.

The law. of conservation of mass shows correct statment that matter is conserved in chemical reaction.

In simple words, Matter is defined as the substance which have mass and occupy some volume.

Matter is of different type in terms of phase:

Solid

Liquid

Gas

An element is defined as a fundamental item which can not be easily broken into further smaller pieces. In physics and chemistry, an element is a substance which can not be broken down by any kind of non-nuclear reactions.

Chemical compound is defined as a chemical substance which is composed of many different identical molecules containing atoms from more than one chemical element which held together by the chemical bonds. A molecule is composed of atoms of only one type of element is therefore not a compound.

The law of conservation of mass states that mass neither be created nor be destroyed in an reaction but it converted from one form to another form in the reaction

Thus, we concluded that the law of conservation of mass shows correct statment that matter is conserved in chemical reaction.

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This is super late so forgive me LOL but the answer is the number of atoms in the reactants is always equal to the number of atoms in the products.

The very dark soils samples that contain the highest amounts of carbon and nitrogen is loamy soil.

Soil is the outermost portion of the earth's crust on which plants grow. The appearance of a soil sample gives an idea of the type and nature of the soil it is.

We are told that two out of the six soil samples gathered are very dark and contains an enormous amount of carbon and nitrogen. These two must be samples of loamy soil.

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Above the line, the air is colder than 0°C. ... The freezing level is the height where the air is 0 degrees Celsius (0 °C) or 32 degrees Fahrenheit (32 °F). Higher than the freezing level, the air is colder. Lower than the freezing level, the air is warmer.

KOH - One oxygen atom

(NH4)2SO4 - Two nitrogen atoms

A chemical formula is a representation of the chemical composition of a substance using symbols and subscripts to indicate the number of atoms of each element in a molecule or formula unit.

In other words, it is a shorthand way of describing a chemical compound using the symbols of the elements present in the compound and the number of atoms of each element in the compound.

The chemical formula can show the way that the atoms in the compounds are arranged.

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Explanation:

Observing a chemical and physical change in a substance can provide several benefits, including:

Understanding the nature of the substance: By observing chemical and physical changes, we can understand the properties of a substance and how it behaves under different conditions. This can help us predict how it will react in different situations and can inform decisions about how to handle it safely.

Identifying the presence of impurities: Chemical and physical changes can also indicate the presence of impurities or contaminants in a substance. This can be important in many different fields, including medicine, manufacturing, and environmental science.

Optimizing processes: By understanding the chemical and physical changes that occur in a substance, we can optimize processes to produce the desired results more efficiently. This can lead to cost savings and improved quality control in industries ranging from food and beverage to pharmaceuticals.

Developing new materials: Observing chemical and physical changes can also help scientists and engineers develop new materials with specific properties or characteristics. By manipulating the conditions under which a substance undergoes chemical and physical changes, new materials can be created with improved performance and functionality.

Answer:

To determine the age of the ancient cloth, we can use the concept of radioactive decay and the half-life of Carbon-14.

Carbon-14 is a radioactive isotope of carbon, which decays over time into nitrogen-14 through beta decay. The half-life of Carbon-14 is 5614 years, which means that after 5614 years, half of the original amount of Carbon-14 in a sample will have decayed.

In this case, the cloth contains only ¼ of its original Carbon-14. This means that three half-lives have passed since the cloth was first created, as each half-life reduces the amount of Carbon-14 by half.

To determine the age of the cloth, we can use the following formula:

N = N0(1/2)^t/T

where N is the current amount of Carbon-14 in the cloth, N0 is the original amount of Carbon-14 in the cloth, t is the time that has passed, and T is the half-life of Carbon-14.

We know that N = ¼ N0, and T = 5614 years. Plugging these values into the formula, we get:

¼ N0 = N0(1/2)^(3/T)

Solving for t, we get:

t = (3/T) * log(2)

Substituting in T = 5614 years, we get:

t = (3/5614) * log(2) ≈ 1,684 years

Therefore, the cloth is approximately 1,684 years old.

In summary, we can use the concept of radioactive decay and the half-life of Carbon-14 to determine the age of the ancient cloth. By knowing the current amount of Carbon-14 in the cloth, we can calculate the time that has passed since it was first created using a simple formula. In this case, the cloth is approximately 1,684 years old.

the percent yield for the reaction = 83.5086

The substance(s) that are initially a part of a chemical reaction are referred to as reactants or reagents. A chemical change often characterizes chemical reaction, and they produce one or more products that typically have characteristics distinct from the reactants. The so-called elementary reactions are reactions that frequently consist of a series of discrete steps, and the information regarding the specific sequence of events is contained within the reaction mechanism. Chemical equations are used to describe chemical processes. These equations represent the initial substances, final products, and occasionally intermediate products as well as the reaction circumstances symbolically.

When a temperature and chemical concentration are known, chemical reaction proceed at a predictable rate. As temperature rises, reaction rates often increase as more thermal energy is available to reach the activation energy.

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Answer:

gravity

Explanation:

your mass is the same on the moon as is on earth or underwater but your weight changes because of gravity

Answer:

Proton I believe

Explanation:

Answer:

B.

Explanation:

B. low temperature, high dissolved oxygen, and neutral pH

Hope this Helps.

The statement that describes a situation that could cause Thomas's data to vary from John's data is as follows: Thomas measures the temperatures only on the sunny days.

An experiment is usually conducted under controlled conditions to test a hypothesis or determine the validity of an existing truth.

According to this question, John wants to prove that the paved area of the playground is hotter than the grassy area of the same playground. He measures the temperature of each area at three different times of the school day and records the temperatures.

However, Thomas wants to replicate this experiment carried out by John. To get the same results after replication, one must ensure to control every variable that was initially controlled.

Therefore, this means that if Thomas measures the temperatures only on the sunny days, he will get a different data from John's data because John measured the temperature on three different times of school days.

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answer; 8.017*10^3

Explanation: because cube means it is multiplication of three times so we multiply 86.3 three times and again we multiply it with 100 because we need to convert it in mm and at last we put the answer in cube root ..

Answer:

I think it's D, not sure though

The chemical commonly used in both water purification and sewage treatment to provide long-term disinfection is chlorine.

Chlorine compounds, such as chlorine gas (Cl2), sodium hypochlorite (NaClO), or calcium hypochlorite (Ca(ClO)2), are added to water or wastewater to kill or inactivate harmful microorganisms, including bacteria, viruses, and parasites. Chlorine acts as a powerful disinfectant by disrupting the cellular structures and metabolic processes of microorganisms, preventing their reproduction and causing their death.

In water purification, chlorine is added to treat drinking water sources and ensure its safety for consumption. It helps to eliminate pathogens and protect against waterborne diseases. In sewage treatment, chlorine is used to disinfect wastewater before it is discharged back into the environment. This step helps to prevent the spread of disease-causing organisms and protect public health.

However, it is important to note that the use of chlorine in water treatment requires careful control and monitoring to ensure proper dosage and minimize potential risks associated with disinfection by-products.

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