what is the molarity ofa solution containing 8.0 g of naoh in 400. ml of naoh solution?

Answer:

79.04 L

Explanation:

We are given;

Initial Volume; V1 = 6.24L

Initial Pressure; P1 = 760 mm Hg

Final pressure; P2 = 60.0mm Hg

To solve for final volume, we will use Boyles law;

P1•V1 = P2•V2

Let's make V2 which is the final volume the subject;

V2 = (P1•V1)/P2

V2 = (760 × 6.24)/60

V2 = 79.04 L

Answer:

D.)

Explanation:

Answer:The two types of chemical bonds that atoms can form to achieve stability are called ionic bonds and covalent bonds. Does this help

Explanation:

The specific heat of the metal with a mass of 100g that absorbed 2500 joules of energy is 0.33J/g°C

The specific heat capacity of a metal can be calculated by using the following expression:

Q = m × c × ∆T

Where;

c = Q ÷ m∆T

c = 2500 ÷ (100 × 74.8)

c = 2500 ÷ 7480

c = 0.33J/g°C

Therefore, the specific heat of the metal with a mass of 100g that absorbed 2500 joules of energy is 0.33J/g°C.

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To determine the number of significant figures in the final answer, we look at the least precise value, which is 10.01 with four significant figures. Therefore, the final answer, 19.858, should be rounded to four significant figures, resulting in 19.86.

To perform the calculations with the correct number of significant figures, we follow these steps:

Step 1: Multiply -17.8 by 0.04:

-17.8 x 0.04 = -0.712

Step 2: Add 10.56 and the result from Step 1:

10.56 + (-0.712) = 9.848

Step 3: Add 9.848 and 10.01:

9.848 + 10.01 = 19.858

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The statement that does not describe radon-222 is  It binds with hemoglobin in the blood and can lead to death.

Radon-222 is a radioactive gas that occurs from the natural decay of uranium. It exists in igneous rock granite all around the world and can seep into homes through cracks in the foundation or soil. Its effects can be reduced by increasing ventilation in the affected areas.

This statement is inaccurate because radon does not bind with hemoglobin in the blood. Instead, radon gas decays into radioactive particles that can be inhaled and damage lung tissue, increasing the risk of lung cancer.

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The d. 0. This is because polar molecules have an uneven distribution of electrons, creating partial charges on different ends of the molecule. To determine if a molecule is polar, we need to look at the geometry of the molecule and the electronegativity difference between the atoms.

Starting with Krf2, this molecule has a linear geometry with two highly electronegative fluorine atoms on opposite ends of the central krypton atom. However, the electronegativity difference between krypton and fluorine is not large enough to create a polar molecule. Therefore, Krf2 is nonpolar.
OCF2 has a trigonal planar geometry with one highly electronegative oxygen atom and two less electronegative fluorine atoms. The dipole moments of the C-O and C-F bonds cancel each other out, making OCF2 a nonpolar molecule.

PF5 has a trigonal bipyramidal geometry with five highly electronegative fluorine atoms and one less electronegative phosphorus atom in the center. The dipole moments of the P-F bonds do not cancel each other out, making PF5 a polar molecule.

SBr6 has an octahedral geometry with six highly electronegative bromine atoms surrounding a central sulfur atom. The dipole moments of the S-Br bonds cancel each other out, making SBr6 a nonpolar molecule.
Therefore, out of the four molecules given, only PF5 is polar. So the main answer to your question is d. 0, as there are no other polar molecules among the given options.

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Answer:

OC. water and carbon dioxide

Explanation:

The equation for photosynthesis is Carbon dioxide plus water plus light energy yields sugar (glucose) and oxygen

Answer:

Water and carbon dioxide

Explanation:

We learned this in Grade 2.

The Chilton-Colburn analogy, also known as Reynolds Analogy, provides a connection between heat transfer and mass transfer of a fluid.

Hence, the corresponding heat transfer correlation, assuming the Chilton-Colburn analogy for mass transfer is:

Sh = 0.023(Re)0.83(3e)1/3

The corresponding heat transfer correlation by Chilton-Colburn analogy is:

Nu = 0.023 (Re)0.83 (Pr)n, where n = 0.4 to 0.6.

Assuming that the Chilton-Colburn analogy holds good for the present situation, the above correlation can be used as a heat transfer correlation.

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Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we're finding the new pressure

\(P_2 = \frac{P_1V_1}{V_2} \\\)

We have

\(P_2 = \frac{13 \times 197000}{23} = \frac{2561000}{23} \\ = 111347.826...\)

We have the final answer as

Hope this helps you

All of the above-mentioned pieces of lab equipment can be used to measure the volume of water in a drinking glass.

However, each piece of equipment has its own advantages and limitations.

A graduated cylinder is a common piece of lab equipment used for accurate measurement of liquid volumes. It has markings along the side that allow for precise measurement of the volume of liquid in the cylinder.

A volumetric flask is a piece of lab equipment designed to measure and hold a precise volume of liquid. It has a narrow neck and a flat bottom, and is typically used for preparing solutions of a specific concentration.

A graduated beaker is similar to a graduated cylinder, but has a wider base and is less accurate for measuring small volumes of liquid.

All three pieces of equipment can be used to measure the volume of water in a drinking glass, but the choice of equipment will depend on the required accuracy and precision of the measurement. A graduated cylinder would be the most accurate choice, while a graduated beaker may be sufficient for less precise measurements.

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Answer:

1. Mg+Hcl--》Mgcl2 + H2

If the process is irreversible, the entropy change may be positive, negative, or zero, depending on the direction of heat flow.

The relation for entropy change for a reversible process is given by the equation ΔS = Qrev/T, where ΔS is the change in entropy, Qrev is the heat absorbed or released during the reversible process, and T is the temperature at which the process occurs. In a reversible process, the entropy change is positive for an increase in temperature and negative for a decrease in temperature. This equation is important in thermodynamics because it allows us to calculate the change in entropy for a reversible process and determine the maximum efficiency of a heat engine.

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Answer:

A wind turbine transforms the mechanical energy of wind into electrical energy. A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.

hope it helps (^^)

# Cary on learning

Let us take our minds back to the kinetic theory of matter. Recall that the particles that compose matter are in constant random motion and the solids are arranged in a definite pattern while the particles of a gas are in random motion.

As such, the zinc has its atoms in a fixed pattern while the hydrogen atoms are roaming freely in the gaseous state.

Given that;

Amount of the acid = 10.95 g/36.5 g/mol = 0.3 moles

Amount of the zinc = 1g/65 g/mol = 0.015 moles

Given the reaction equation; \(Zn(s) + 2HCl(aq) ------ > ZnCl_{2} (aq) + H_{2}(g)\)

1 mole of Zn reacts with 2 moles of acid

0.015 moles of zinc reacts with x moles of acid

x =0.015 moles * 2 moles / 1 mole

= 0.03 moles

Thus, the zinc is the limiting reactant.

1 moles of the zinc produces 1 mole of the hydrogen

The amount of the hydrogen produced =  0.03 moles * 2 g/mol

= 0.06 moles of hydrogen

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Answer:

need more info on block labeled ''A''

Explanation:

Chemicals released by a neuron onto a target with an excitatory or inhibitory effect are called neurotransmitters. Therefore, the correct answer is option C: neurotransmitters.

Neurotransmitters are chemical messengers that transmit signals between neurons and their target cells, which can be other neurons, muscle cells, or gland cells. They are synthesized and stored within the neuron's synaptic vesicles. When an action potential reaches the presynaptic neuron's terminal, it triggers the release of neurotransmitters into the synapse, the small gap between the presynaptic neuron and the postsynaptic target cell.

Neurotransmitters can have excitatory or inhibitory effects on the postsynaptic cell. Excitatory neurotransmitters promote the generation of an action potential in the postsynaptic cell, while inhibitory neurotransmitters decrease the likelihood of an action potential being generated. This excitatory or inhibitory effect is determined by the specific receptors on the postsynaptic cell that bind to the neurotransmitters.

Examples of neurotransmitters include acetylcholine, dopamine, serotonin, gamma-aminobutyric acid (GABA), and glutamate. They play crucial roles in regulating various physiological and cognitive processes, including mood, memory, muscle contraction, and pain sensation.

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Answer: T = 9.74°C

Explanation: An ideal gas in a quasi-static adiabatic process follows the equation: \(pV^{\gamma} = constant\).

So:

\(1.10^{1.67} = constant\)

constant = 46.7735

Adiabatic conditions can be written as:

\(TV^{\gamma-1}=constant\)

Then, new temperature is

\(T.(10.4)^{1.67-1}=46.7735\)

\(T.(10.4)^{0.67}=46.7735\)

\(T = \frac{46.7735}{4.802}\)

T = 9.74°C

The new temperature is 9.74°C.

All the functional groups except ether are present.

functional group both carbon-carbon and carbon-hydrogen sigma bonds are single strong, nonpolar covalent bonds functional groups that are usually the least reactive bonds in organic molecules. Alkane order groups form the inert framework of most organic amalgams. For this reason, alkanes are not formally considered a functional group.

Functional groups are groups of atoms or bonds that define the purpose of the hydrocarbon that they get nuts about some of the important functional groups in biological molecules to involve: hydroxyl, methyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups

So we can conclude that Thus the ether functional group is away in the given structure.

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Answer:

How does non-human life in an urban ecosystem differ from that in an undeveloped forest ecosystem?

Explanation:

In forest eco system the people are uncivilized and not so much educated. And in urban eco system people are intelligent as well as educated this is the main reason. In an urban ecosystem, the only non-human life that live there are the ones that are able to survive under the conditions. However, in undeveloped forest ecosystems, there’s barely any pollution. Therefore, a bigger variety of non-human life is able to live here.

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2.60 moles.

Zn (s) + 2 Ag+ (aq) --> 2 Ag (s) + Zn2+ (aq), each mole of zinc gives out two moles of silver. Therefore, 1.30 moles of zinc will displace 2.60 moles of silver. ( 1.30 × 2)

More about silver nitrate:

An inorganic substance with the chemical formula AgNO3 is silver nitrate. This salt serves as a flexible base for numerous different silver compounds, including those employed in photography. Compared to halides, it is far less light-sensitive. Lunar caustic was previously the name given to it since early alchemists referred to silver as luna and connected it to the moon.

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Answer: 4.74 moles of gas are in the container.

Explanation:

1. Use the ideal gas law. PV = nRT. and re-arrange from moles by divided RT on both sides.

2.You should get the following equation: \(n=PV/RT\)

3.Insert values: \(n = PV/RT = \frac{(4.9 atm)(28 L)}{(0.082 (L*atm)/(K*mol)*(353K)} = 4.74 moles.\)

4.There are 4.74 moles in the container.

Good luck with chemistry!

RbCl has a lower charge and a higher melting point. Since the strontium and oxygen ions are bound acrystalline lattice according to the bonding concept, you would expect SrO to have a higher melting point.

What, in theory, is bonding?

Valence Covalent bond formation and the electrical structure of molecules are both covered by bond theory. The theory presupposes that inside a molecule, specific atoms' atomic orbitals are occupied by electrons, and that electrons from one atom are drawn to the nucleus of another atom.

What are the three theories of bonds?

Lewis hypothesis In this idea, the atom's surrounding electrons and lone pairs are represented by dots. Theory of valence bonds: According to this hypothesis, bonds are formed when electrons are shared among atoms' orbitals. Theory of molecular orbitals That is

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\(Mg + 2HCl\) -> \(MgCl_{2} + H_{2}\)

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Answer:

The reactants of photosynthesis are Carbon Dioxide and water. The products are Glucose (or starch/sugar) and Oxygen. The autotroph uses light energy from the sun in order to complete this process. In the formula, the arrow is the light energy.

Explanation:

Answer:

I've inserted an image.

Explanation:

Hope this helps!

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Answer:

frozen foods

Explanation:

explanation

Answer:

I think it is dried beans

Explanation:

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

"Mayans cooking method includes digging a shallow pit, lining it with stones or clay balls.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya, with different types of fruit. Corn was made into a kind of porridge, called atole in Mesoamerica and capita in Inca territory.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

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Answer:

24.47 L

Explanation:

Using the general gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = 0.0821 Latm/molK

T = temperature (K)

According to the provided information in this question,

P = 1.0 atm

V = ?

n = 1 mol

T = 25°C = 25 + 273 = 298K

Using PV = nRT

V = nRT ÷ P

V = 1 × 0.0821 × 298 ÷ 1

V = 24.465 ÷ 1

V = 24.465

V = 24.47 L