An illustration of a 500 ml beaker with liquid filled up to 300 ml. why are the marked lines on a beaker like this useful for measuring the volume of a liquid? a liquid maintains its shape in the beaker, so the beaker can measure the liquid’s height, and the height cubed equals the liquid’s volume. a liquid conforms to the circular area of the beaker, and this area multiplied by the liquid’s height equals its volume. a liquid is usually made of neutral atoms, and the beaker does not add or remove energy from the atoms, thereby preventing ionization. a liquid is compressible, but since the beaker does not have a top on it, the liquid will maintain its same volume.

The limiting reagent in the reaction between 43.5 g of nitrogen gas (N₂) and 12.3 g of hydrogen gas (H₂) is hydrogen gas (H₂).

This can be determined by

1. To determine the limiting reagent, we need to compare the amount of each reactant present and their stoichiometric ratios in the balanced chemical equation.

2. The balanced equation for the reaction between nitrogen gas and hydrogen gas is N₂ + 3H₂ → 2NH₃.

3. The molar mass of nitrogen gas (N₂) is 28 g/mol, and the molar mass of hydrogen gas (H₂) is 2 g/mol.

4. To find the number of moles of each gas, we divide their masses by their respective molar masses. For nitrogen gas, we have 43.5 g / 28 g/mol = 1.55 mol. For hydrogen gas, we have 12.3 g / 2 g/mol = 6.15 mol.

5. Based on the stoichiometric ratio in the balanced equation, 1 mole of nitrogen gas reacts with 3 moles of hydrogen gas. Therefore, the nitrogen gas requires 1.55 mol × 3 = 4.65 mol of hydrogen gas.

6. Since we have only 6.15 mol of hydrogen gas, which is greater than the required amount for nitrogen gas, hydrogen gas is present in excess, and nitrogen gas is the limiting reagent.

7. Therefore, hydrogen gas is the excess reagent, and nitrogen gas is the limiting reagent in this reaction.

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Answer: i think it is 144.16

Explanation:

The total quantity of charge that must be supplied to turn the copper(II) ions into solid copper atoms is 3.38 × 10^5 C.

Aqueous solution = 250 mL = 0.250 L

Dissolved copper(II) chloride = 2.37 g

Each copper(II) ion has two less electrons than protons.

Copper(II) ion weight = 1.12 g

Each copper(II) ion gains 2 electrons.

The total quantity of charge that must be supplied to turn copper(II) ions into solid copper atoms = ?

We know that copper(II) chloride dissociates into copper(II) and chloride ions as given below:

CuCl₂ → Cu²⁺ + 2Cl⁻

One mole of copper(II) chloride will give one mole of copper(II) ions and two moles of chloride ions.

1 mole CuCl₂ → 1 mole Cu²⁺ ions

Now, the number of moles of CuCl₂ can be calculated as follows:

Molar mass of CuCl₂ = 63.546 + 2 × 35.453 = 134.452 g/mol

Number of moles of CuCl₂ = mass / molar mass = 2.37 / 134.452 = 0.01764 mol Cu²⁺ ions

Weight of Cu²⁺ ions = 1.12 g

Number of moles of Cu²⁺ ions = mass / molar mass = 1.12 / 63.546 = 0.01764 mol

Cu²⁺ ions in 1 g of Cu²⁺ ions = 1 / molar mass of Cu²⁺ ions= 1 / 63.546 = 0.01572 mol

Charge required for 1 Cu²⁺ ion to form Cu atom = 2 × 1.6 × 10^-19 C= 3.2 × 10^-19 C

Charge required for 0.01764 mol of Cu²⁺ ions to form Cu atom= 0.01764 × 6.022 × 10²³ × 3.2 × 10^-19= 3.38 × 10^5 C

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Answer: Does adding salt to water make the water boil faster that if salt is not added?

Explanation:

The scientific question for the boiling water experiment could be: "What is the effect of increasing temperature on the boiling point of water?"

This question aims to investigate how temperature influences the boiling point of water. By conducting the experiment and analyzing the results, scientists can gain a better understanding of the relationship between temperature and the physical state change of water from liquid to vapor.

The question focuses on a specific variable (temperature) and its impact on the boiling process, allowing for a targeted investigation and potential insights into the behavior of water under different conditions.

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When an ester is hydrolyzed with water and sulfuric acid, the products formed are an alcohol and a carboxylic acid. This reaction is also known as saponification.

During the reaction, the ester bond is broken and the water molecule is split into a hydrogen ion (H+) and a hydroxide ion (OH-). The H+ ion reacts with the ester, causing it to break down into its alcohol and carboxylic acid components. The carboxylic acid is formed by the addition of the hydroxide ion to the carbonyl group of the ester. The alcohol is formed by the addition of the hydrogen ion to the oxygen atom of the ester. The resulting products are a carboxylic acid and an alcohol that are both hydrolyzed from the original ester.

1. Identify the ester you want to hydrolyze. An ester has the general structure RCOOR', where R and R' are alkyl or aryl groups.
2. In the hydrolysis reaction, water (H2O) is used as a reactant along with sulfuric acid (H2SO4) as a catalyst.
3. The ester (RCOOR') reacts with water (H2O) in the presence of sulfuric acid (H2SO4).
4. The hydrolyzed products formed are a carboxylic acid (RCOOH) and an alcohol (R'OH).

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Answer:

D

Explanation:

It states that D has oxygen, and is closer to the Sun.

Hope this helped, and please mark as Brianliest <3

Answer:

I am pretty sure it is B

Explanation:

The others would either burn u like a crispy chicken nugget or freeze you like a popsicle

Measuring tool would you use to measure the area of a football field is used a tender wheel

If you need to measure much longer lengths for example the length of a football pitch then you could use a trundle wheel then you use it by pushing the wheel along the ground and it clicks every time it measures one meter and to measure the football field area then

Area = length×breadth

Area = 90m×45m

Area = 4.05m²

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The Mercury-181 would undergo a beta decay to produce daughter nuclei. This would be the option B

We know that the term radioactive decay has to do with the kind of decay that involves the breakdown of an atom as we look at the formation of a new atom.

In this case, we can see that Mercury-181 undergoes a-decay. As the decay is taking place, there would be the loss of certain particles and there would be the formation of a new substance in the nuclear reaction.

Hence, in a nuclear reaction, there is the decay of a parent nucleus to produce a daughter nucleus.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

An overpack containing four one-liter metal cans of NA1993, Compounds, cleaning liquid, a Class 3 (Flammable liquid), PG III, being offered for transportation by highway, may qualify for specification packaging. This is further explained below.

Generally, The term "specification packaging" refers to a package that meets one of the packaging specifications or standards listed in this subchapter's parts 178 or 179.

In conclusion, It's possible that an overpack that contains four metal cans of one liter each filled with NA1993, Compounds, cleaning liquid, a Class 3 (Flammable liquid), PG III, and that's being provided for transportation on the highway might qualify as specified packing.

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In scientific investigations, the effect of fertilizer on plant growth can be studied by examining various variables. Two key variables in this context are the presence or absence of fertilizer (independent variable) and the size or growth of the plant (dependent variable).

When investigating the effect of fertilizer on plant growth, the independent variable is the presence or absence of fertilizer. This variable is controlled by having two groups of plants: one group receiving fertilizer (experimental group) and another group without fertilizer (control group). By comparing the growth of these two groups, we can determine the impact of fertilizer on plant size.

The dependent variable, on the other hand, is the size or growth of the plant. This variable is measured or observed as the outcome of interest. In this case, it would be the height, weight, or overall size of the plants.

By systematically changing the independent variable (presence or absence of fertilizer), we can observe how it affects the dependent variable (plant growth). The experimental group receiving fertilizer is expected to show greater plant growth compared to the control group without fertilizer. This allows us to draw conclusions about the effect of fertilizer on plant growth.

However, it is important to note that the specific outcome may vary depending on other factors such as plant species, soil conditions, and environmental factors. Conducting a controlled experiment while considering these factors helps in obtaining more reliable results.

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Answer:

because the water brings a cool breeze when the wind blows

Explanation:

Answer:

put only the light items on it

Explanation:

isotope is the correct answer

The hydrogen ion concentration is \(6.31 * 10^(-12)\)

To calculate the hydrogen ion concentration ([H+]) in a solution based on its pH, we can use the equation:

\(

[H+] = 10^(-pH)

\)

Given that the pH of the solution is 11.20, we can substitute this value into the equation to find the hydrogen ion concentration:

\(

[H+] = 10^(-11.20)

\)

Calculating this using a calculator or mathematical software, the hydrogen ion concentration is approximately \(6.31 x 10^(-12)\) M (moles per liter).

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Answer:

it is Gas

Explanation:

that is the correct answer

i hope i helped

Answer:

Ozon prevents us from UV rays of the sun. Ozone hole means that UV rays are entering the Earth. This results in cancer.

Explanation:

Chlorofluorocarbons are causing this

Answer:

The term ‘ozone hole’ refers to the depletion of the protective ozone layer in the upper atmosphere (stratosphere) over Earth's polar regions. People, plants, and animals living under the ozone hole are harmed by the solar radiation now reaching the Earth's surface—where it causes health problems, from eye damage to skin cancer.

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

Answer:

2.39×10¯⁵ m²

Explanation:

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

Distance (d) = 8.08×10¯⁵ m

Charge (q) = 2.24×10¯⁹ C

Potential difference = 855 V

Area(A) =?

NOTE: Permittivity (ε₀) = 8.854×10¯¹² F/m

The area can be obtained as follow:

q = ε₀AV/d

2.24×10¯⁹ = 8.854×10¯¹² × A × 855 / 8.08×10¯⁵

2.24×10¯⁹ = 7.57×10¯⁹ × A / 8.08×10¯⁵

Cross multiply

7.75×10¯⁹ × A = 2.24×10¯⁹ × 8.08×10¯⁵

7.75×10¯⁹ × A = 1.81×10¯¹³

Divide both side by 7.75×10¯⁹

A = 1.81×10¯¹³ / 7.75×10¯⁹

A = 2.39×10¯⁵ m²

Thus, the area of the plate is 2.34×10¯⁵ m²

Answer:

2.39

Explanation:

Effects of influenza ​are A muscle or other part of the body hurts. headaches. fatigue (tiredness) Some people may experience vomiting and diarrhea, which is more prevalent in children than in adults.

The flu, also known as influenza, is a contagious viral illness that can cause mild to severe symptoms as well as life-threatening complications, including death, in otherwise healthy children and adults.

Influenza viruses primarily move from person to person through coughing or sneezing. They can also be transmitted less frequently by touching a contaminated surface and then touching the mouth, eyes, or nose. Individuals can spread the flu to others even before their own symptoms appear and for up to a week after symptoms appear.

The influenza virus infects the nose, throat, and sometimes the lungs, causing a contagious respiratory disease. It can bring mild to serious illness and, in extreme cases, death.

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Answer:

0.000001 joule

Explanation:

brainlest?

The heating element of a coffee maker operates at 120V. Here's an explanation of the statement: 120V refers to the voltage at which the heating element of a coffee maker operates.

This voltage is usually printed on the coffee maker's packaging or on the machine itself. When the coffee maker is turned on, electricity flows through the heating element, causing it to heat up. The element's temperature is directly proportional to the amount of current flowing through it. Therefore, if the voltage supplied to the element is reduced, the current through it will decrease, and the element's temperature will decrease, causing the coffee to be made less hot.

In conclusion, knowing the voltage at which the heating element of a coffee maker operates is important because it determines how hot the coffee will be.

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Answer:

135.80 g of Ag

Explanation:

\(40gCu *\frac{1mol Cu}{63.546g Cu} *\frac{2mol Ag}{1molCu} *\frac{107.868g Ag}{1mol Ag}\)

~ 135.80 g of Ag

Answer:

Explanation:

The average speed of the car can be found by using the formula

\(s = \frac{d}{t} \\ \)

d is the distance

t is the time taken

From the question we have

\(s = \frac{378}{12} = \frac{63}{2} \\ \)

We have the final answer as

Hope this helps you

The answer is 0.365:100.

v/c ratio represents ratio of speed of an electron (v) to the speed of light (c).

How is the speed of an electron calculated?

\(v =\frac{1}{n}\; \frac{e^{2}}{4\pi \varepsilon _{0}}\times \frac{2\pi }{h}\)

Now, for the first excited state, n = 2.

e - Charge of electron = \(1.6\)×\(10^{-19}\) C

h - Plank's constant = \(6.6\)×\(10^{-34} J.s\)

ε₀- permittivity \(= 8.85\)×\(10^{-12}\)\(N^{-1}.C^{2}.m^{-2}\)

\(v =\frac{1}{2}\; \frac{e^{2}}{4\pi \varepsilon _{0}}\times \frac{2\pi }{h} =\frac{1}{4}\times \frac{(1.6\times 10^{-19})^{2}}{8.85\times 10^{-12}\times 6.6\times 10^{-34}}\\ \\ =0.01096\times 10^{8} \\ \\=1.096\times 10^{6}ms^{-1}\)

\(\frac{v}{c} =\frac{1.096* 10^{6}\ m/s }{3.0 *10^{8}\ m/s }\)= \(\frac{0.365}{100}\)

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One potential source of error that may have occurred during the calorimetry experiment reaction is heat loss or gain to the surroundings. This can lead to inaccuracies in the measurements and affect the final results.

Calorimetry is a process that is used to measure the heat of a reaction. In this process, heat is exchanged between the system (the substance being studied) and the surroundings (the environment in which the reaction is taking place).One potential source of error that may have occurred during the calorimetry experiment is heat loss or gain to the surroundings.

This can occur if the calorimeter is not properly insulated or if the reaction vessel is not properly sealed. Heat loss can cause the measured temperature change to be less than the actual temperature change, while heat gain can cause the measured temperature change to be greater than the actual temperature change.Both of these situations can lead to inaccuracies in the measurements and affect the final results.

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Answer:

C. H2(g)

Explanation:

Answer:

b

Explanation:

Option a, c and d are correct.

The following information should be considered;

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