If measurements are made, then they are more precise on a larger scale.?

Explanation:

pressure decrease and collision decreases

Explanation:

2moles of NaOH -> 2moles of H2O

so the number of moles r equal.

hence moles of H2O is 12.5

According to ideal gas equation, 3731.78 liters of ammonia is produced at STP.

The ideal gas equation is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.

Substituting P=1 atmosphere ,n=28/17.03=1.644 moles ,R=8.314 , T=273 K in the formula,V=1.644×8.314×273/1=3731.78 liters.

Thus,3731.78 liters of ammonia is produced at STP.

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Your question is incomplete, but most probably your full question was,how many liters of ammonia, measured at STP, are produced when 28.0 grams of nitrogen is completely consumed?

N2(g) + 3 H2(g) → 2 NH3(g)

A.

11.2

B.

44.8

C.

22.4

D.

5.60

E.

3731.38

Answer:

This increases our molar volume relative to an ideal gas, which results in a value of Z that is greater than 1.

Explanation:

textbook

Answer:

B. Molar volume decreases

Explanation:

The given reaction has a standard enthalpy of reaction of -368.62 kJ/mol.

The balanced equation for the reaction is:

\(2Na(s) + 2H_2O(l) → 2NaOH(aq) + H_2(g)\)

The following equation can be used to get the reaction's standard enthalpy change (H°rxn):

ΔH° = ΣnΔH°f(products) - ΣnΔH°f(reactants)

the standard enthalpy change of the reaction:

ΔH° = [2(−470.11 kJ/mol) + 0] − [2(0) + 2(−285.8 kJ/mol)]

ΔH° = −940.22 kJ/mol + 571.6 kJ/mol

ΔH°= −368.62 kJ/mol

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The planets in our solar system move in predictable patterns, as early astronomers found.

They were able to develop the rules of planetary motion and make precise predictions about the positions of the planets through careful observation and calculation. Later scientists might build on this work to grasp gravity, space, and the nature of our universe more fully. These discoveries are still being built upon today as we explore the solar system and beyond. It is useful to know how the planets move because it makes it easier to navigate satellites and spacecraft. In the end, the discoveries made by early astronomers have had a significant influence on how we perceive the universe and our role in it.

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--The complete Question is, What did early astronomers discover about the movements of the planets, and why does it matter to our understanding of space and our planet today?  --

The solubility of a gas in a liquid under different pressures can be calculated using Henry's Law.

The solubility of a gas in a liquid under different pressures can be calculated using Henry's Law, which describes the relationship between the pressure of a gas and its solubility in a liquid. According to Henry's Law, at a constant temperature, the solubility (S) of a gas in a liquid is directly proportional to the partial pressure (P) of the gas above the liquid.

Mathematically, Henry's Law is expressed as:

S = k * P

Where:

S = Solubility of the gas in the liquid (usually in mol/L or g/L)

k = Henry's Law constant, which is specific to the gas and the solvent at a given temperature (units depend on the units of pressure and solubility chosen)

P = Partial pressure of the gas above the liquid (usually in atm or kPa)

To calculate the solubility of a gas in a liquid under different pressures, you would typically perform the following steps:

Determine the Henry's Law constant (k) for the specific gas and solvent at the given temperature.

Measure or obtain the partial pressure (P) of the gas above the liquid at the desired pressure conditions.

Use the Henry's Law equation to calculate the solubility (S) of the gas in the liquid:

S = k * P

The solubility will be in units of mol/L (molarity) or g/L, depending on the units used for the Henry's Law constant and partial pressure.

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The molarity of KMnO4 in the given solution is approximately 0.00126 M. Molarity is a measure of the concentration of a solute in a solution. It represents the number of moles of the solute present per liter of the solution.

To determine the molarity of KMnO4 in the given solution, we need to first calculate the number of moles of KMnO4 using its mass and molar mass, and then divide it by the volume of the solution.

The molar mass of KMnO4 can be calculated as follows:

(1 × atomic mass of potassium) + (1 × atomic mass of manganese) + (4 × atomic mass of oxygen)

= (1 × 39.10 g/mol) + (1 × 54.94 g/mol) + (4 × 16.00 g/mol)

= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol

= 158.04 g/mol

Now, let's calculate the number of moles of KMnO4:

Number of moles = Mass / Molar mass

Number of moles = 0.0897 g / 158.04 g/mol

Number of moles ≈ 0.000567 mol

Next, we need to calculate the molarity using the number of moles and the volume of the solution:

Molarity (M) = Number of moles / Volume (in liters)

Molarity = 0.000567 mol / 0.450 L

Molarity ≈ 0.00126 M

In this case, the molarity tells us the concentration of KMnO4 in moles per liter.

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Answer:

1.a member of carbon family  with 14 eletrons is silicon

2.halide which is liquid at room temperature is bromine

3.transition metal with 79 electrons/protons and neutron 80 for me Is Gold

An element with properties halfway between those of metals and nonmetals is said to be a metalloid. Semimetals are another name for metaloids.

A metalloid is an element that is difficult to categorize as either a metal or a nonmetal because it has a majority of qualities that fall between those of metals and nonmetals or that are a combination of both.

Except for hydrogen, which is a nonmetal, the elements are arranged in a triangle with the metals to the left, the nonmetals to the right, and the metalloids to the immediate right of the triangle.

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Answer:

D

Explanation: A precipitation reaction is a type of chemical reaction in which two soluble salts in aqueous solution combine and one of the products is an insoluble salt called a precipitate.

Answer: D. a solid product formed from aqueous reactants

Answer(s):

Template: reactants ⇒ products

1. \(Ag+KNO_3\) ⇒ \(AgNO_3 + K\)

2. \(Zn+AgNO_3\) ⇒ \(Zn(NO_3)_2 + Ag\)

3. \(Al + H_2SO_4\) ⇒ \(Al_2(SO_4)_3 + H_2\)

4. \(Cl_2+KI\) ⇒ \(HCl + I_2\)

5. \(Li + H_2O\) ⇒ \(LiOH + H_2\)

6. \(Cu + FeSO_4\) ⇒ \(CuSO_4 + Fe\)

7. \(Na + H_2O\) ⇒ \(NaOH + H_2\)

8. \(Fe+Pb(NO_3)_2\) ⇒ \(Fe(NO_3)_2 + Pb\)

9. \(Cu+H_2O\) ⇒ \(CuO + H_2\)

10. \(Cu+Al_2(SO_4)_3\) ⇒ \(CuSO_4 + Al\)

11. \(Al + Pb(NO_3)_2\) ⇒ \(Al(NO_3)_3 + Pb\)

What is a chemical equation?

A chemical equation consists of the chemical formulas of the reactants (on the left) and the products (on the right). The two are separated by an arrow symbol (“→” usually read aloud as “yields”). Each individual substance's chemical formula is separated from others by a plus sign.

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*: (=' :') this

•.. (,('')('') helped :)

The energy change when the temperature of the 12.4 grams of the  solid silicon is decreased from the 8.4 °C to 22.1 °C  is 120.6 J.

The mass of the solid silicon = 12.4 g

The initial temperature = 8.4 °C

The final temperature = 22.1 °C

The specific heat of solid silicon = 0.71 J/g °C

The heat energy expressed is as :

q = mc ΔT

where,

m = mass = 12.4 g

c = specific heat = 0.71 J/g °C

ΔT = 22.1 °C - 8.4 °C

     = 13.7 °C

By solving the values :

q = 12.4 ×0.71 × 13.7

q = 120.6 J

The heat energy required is 120.6 J.

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The statement in which La Niña affect the climate of the Pacific Ocean is "The cold water sinks deeper into the ocean."

La Niña is a climate phenomenon that depicts the cooling of surface ocean waters along the coast of South America's tropical west coast.

The average weather in a certain place over a longer length of time is referred to as climate.

The jet stream moves northward and weakens across the eastern Pacific as a result of La Niña. The South experiences warmer and drier weather than usual during La Nia winters. The North and Canada are wetter and colder than the rest of the country. The seas off the Pacific coast are cooler and contain more nutrients than typical during La Niña.

Water in the eastern Pacific is colder than typical because to La Niña. El Niño might cause the water to be warmer than usual in the same place. During La Niña years, drought-stricken areas are drenched, while El Niño years are drenched.

Hence the correct option is 2.

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Created by considering different compounds and their ability to form hydrogen bonds with water molecules. Here's a series that shows increasing hydrogen bonding.

Methane (CH4): Methane consists of only nonpolar covalent bonds and lacks hydrogen bonding. It does not readily form hydrogen bonds with water.

Ethanol (CH3CH2OH): Ethanol contains a hydroxyl (-OH) functional group, which can participate in hydrogen bonding. It can form hydrogen bonds with water, but its hydrogen bonding ability is relatively weaker compared to other compounds in the series.

Acetic Acid (CH3COOH): Acetic acid contains a carboxyl (-COOH) functional group, which can form hydrogen bonds with water. It has a stronger ability to form hydrogen bonds compared to ethanol due to the presence of an additional oxygen atom.

Glycolic Acid (HOCH2COOH): Glycolic acid possesses two hydroxyl groups, allowing for more hydrogen bonding interactions with water. It can form stronger hydrogen bonds compared to acetic acid.

Glycerol (C3H8O3): Glycerol contains three hydroxyl groups, enhancing its ability to form hydrogen bonds with water. The multiple hydroxyl groups increase the number of potential hydrogen bonding sites, resulting in stronger interactions with water.

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False.....................

Nitrogen and carbon are important to life because they are essential elements for the formation of biological molecules and the functioning of living organisms.

Carbon is the backbone of organic compounds, including carbohydrates, lipids, proteins, and nucleic acids, which are the building blocks of life. It forms stable covalent bonds with other elements, allowing for the diversity and complexity of organic molecules. Carbon compounds serve various functions in organisms, such as providing energy, storing genetic information, and participating in cellular processes.

Nitrogen is a crucial component of proteins and nucleic acids (DNA and RNA), which are vital for cell structure, growth, and regulation. Nitrogen is also present in amino acids, the building blocks of proteins. Many important biological processes, such as enzyme activity and gene expression, rely on nitrogen-containing compounds. Additionally, nitrogen plays a role in the nitrogen cycle, facilitating the conversion of atmospheric nitrogen into forms usable by plants and other organisms.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{1.3 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 2.159468...\)

We have the final answer as

Hope this helps you

Answer:

AL- waves

Explanation:

because it is famousable

Answer:

Air is less dense on a mountaintop than at sea level.

Air pressure is lower at low altitudes.

As you climb a mountain, air pressure increases.

More force pushes on the air at the bottom of an air column.

As you descend a mountain, air molecules are closer together.

Explanation:

Answer:

Surface tension is a force that pulls particles at the exposed surface of a liquid toward other liquid particles. Surface tension explains why water forms droplets, like the water droplet that has formed on the leaky faucet pictured in the Figure below.

Answer:

balanced

Explanation:

A driver wants to drive at a constant speed so he uses his cruise control. He wants the forces acting on him to be balanced. Thus, the correct option for this question is D.

Cruise control may be defined as a type of system that significantly controls the speed of a motor vehicle automatically. It maintains the speed of the vehicle constant without the use of the accelerator pedal once you selected a specific speed.

The speed of the vehicle must remain constant during the course of time. This is possible when the force acting on the driver must be in a balanced state. Otherwise, it will be difficult for the driver to sustain the same speed for a long time.

Therefore, a driver wants to drive at a constant speed so he uses his cruise control. He wants the forces acting on him to be balanced. Thus, the correct option for this question is D.

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4.605 g is the minimum mass of glycerol that must be dissolved to make a 0.020 molar solution.

The minimum mass of glycerol that must be dissolved to make a 0.020 molar solution, use the formula for molarity  

: molarity = moles of solute/liters of solution.

For  moles of solute, we have : n = m/M , where n is moles of solute, m is mass of solute in grams, and M is the molar mass of the solute.

Here, Molar concentration = 0.020 M; Volume = 2.5 L; Molar mass of glycerol = 92.1 g/mol

The minimum mass of glycerol required is

molarity = moles of solute/liters of solution.

We know that molarity = 0.020 M and liters of solution = 2.5 L. Therefore, moles of solute is -

molarity = moles of solute/liters of solution

0.020 M = moles of solute/2.5 L

moles of solute = 0.050 mol

Now ,

n = m/M -> m = n x M

here Moles of solute, n, 0.050 mol and the molar mass of glycerol, M, is 92.1 g/mol.

we get the minimum mass of glycerol required: m = n x M= 0.050 mol x 92.1 g/mol= 4.605 g

Therefore, 4.605 g is the minimum mass of glycerol that must be dissolved to make a 0.020 molar solution.

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Answer:

375.8 × 10²³ molecules

Explanation:

Given data:

Number of molecules of acetylene = ?

Volume of cylinder = 1400 L

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

PV = nRT

1 atm × 1400 L = n ×  0.0821 atm.L/ mol.K    × 273.15 K

1400 L.atm = n × 22.43  atm.L/ mol

n = 1400 L.atm / 22.43  atm.L/ mol

n = 62.4 mol

1 mole contain 6.022 × 10²³ molecules

62.4 mol × 6.022 × 10²³ molecules / 1 mol

375.8 × 10²³ molecules

The correct volume of this wood block which has the given dimensions is 254.23 cubic cm.

In Science, a significant figure can be defined as the number of digits in a numerical data (value), typically a measurement from an experiment, which enhances its degree of accuracy.

By dimension, a wood block is a rectangular prism. Mathematically, the volume of a rectangular prism should be calculated by using this formula:

V = L × W × H

Where:

Substituting the given parameters into the formula, we have;

V = 7.50 × 7.45 × 4.55

Volume, V = 254.23 cubic centimeters.

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As an example of how CO2 is utilized in industry, it is employed as an inert gas in welders and flame extinguishers, as just a pressurizing gas for air cannons and oil recovery, as a supercritical solvent in coffee decaffeination and supercritical drying.

Chemical intermediaries, such as methanol, syngas, & formic acid, can be produced from CO2 using a variety of catalysts. These molecules subsequently act as feedstocks in those other industrial processes.Additionally, CO2 can be converted by catalysts to polymers, which serve as building blocks for plastics, adhesives, & medications.

The creation of ethanol, fertilizer, natural gas processing, hydrogen synthesis in refineries, and, most recently, coal-fired power generation are among the industrial processes where large-scale carbon capture has been shown and is currently in use.

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