Humidity refers to the amount of water vapor present in the air. It is not directly related to the amount of precipitation that falls or the temperature of the air that causes condensation.
Humidity is a measure of the moisture content in the air. It represents the concentration of water vapor present in the atmosphere. It is independent of precipitation, which refers to the amount of water in liquid or solid form falling from the atmosphere to the ground.
Similarly, while temperature influences the capacity of air to hold water vapor, it is not the same as humidity itself. Humidity levels can vary without any direct correlation to the temperature or the occurrence of precipitation.
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In nerve impulse conduction, what happeris after the neurotransmitter is
received from the dendrites?
O Na+ travels into the cell
OK+enters the cell
O Action potentials travel the length of the axon
O Action potential simulates the neighboring neurons
Answer:
The correct option is;
Action potentials travel the length of the axon
Explanation:
A dendrite are nerve cell projections that are used for receiving signals from other nerve cells
A neurotransmitter is the chemical, produced by the nerve cell to contain the message the nerve cell intends to transmits across a neural junction, to the cell for which the message is meant such as a muscle cell, gland cell, or other nerve cells
Therefore, the received message from the dendrite by the present neuron are transported using action action potential which is the means by which electrical signals are transported by a neuron through the length of the axon which is the projection of the nerve cell, known as the nerve fiber that conducts action potential which are electrical impulses to other destination by traveling the length of the of the axon to the location of the destination cell of the action potential
Scientists say that the solar system formed from______.
Answer:
a rotating disk of dust and gases
Explanation:
brainliest?
Answer: scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova). ... Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.
Explanation:
1 point
Sulfur (S) Oxygen (02) water (H2O) and Sodium Chloride (NaCl) are all
examples of pure substances. Which of the following describes all pure
substances *
A pure substance cannot be broken down into simpler substances
O A pure substance consists of only one element
A pure substance has a definite chemical composition
A pure substance is normally found as a solid in room temperature
Answer:
A pure substance has a definite chemical composition
A pure substance has a definite chemical composition in all states. Pure substance can be composed of multiple elements but the composition does not alter in any case.
What are pure substances ?Pure substances are formed either a single component or a combination of more components with a definite composition forming a single phase. Unlike mixtures a pure substance cannot be separated into its components physically.
For example pure water is a pure substance. Water is formed from hydrogen and oxygen atoms in a definite proportion forming a molecular compound that does not alter anyway.
However, salt solution, mixture of two gases etc. are not pure substance. They haven't a definite composition and can be separated by some physical methods. Hence, option c is correct.
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a student dissolved 1.12 grams of an unknown compound in water in a 250.0 mL volumetric flask and adds water up to the mark. She finds that the concentration of the solution is 0.077 M. what is the molar mass of the compound?
The molar mass of the unknown compound is 58.2 g/mol.
To find the molar mass of the unknown compound, we need to use the formula:
Molar mass = (mass of compound / moles of compound)
First, we need to calculate the number of moles of the compound in the solution. We can do this by using the formula:
moles = concentration (M) x volume (L)
We are given that the concentration of the solution is 0.077 M and the volume is 0.25 L (since it was made in a 250.0 mL volumetric flask). Plugging these values into the formula, we get:
moles = 0.077 M x 0.25 L = 0.01925 moles
Now, we can use the formula for molar mass to calculate the mass of the compound. We are given that the mass of the compound is 1.12 grams, so:
Molar mass = 1.12 g / 0.01925 moles = 58.2 g/mol
The given problem is about finding the molar mass of an unknown compound that has been dissolved in water. We know the mass of the compound that was added to the solution, as well as the concentration of the resulting solution. Using this information, we can calculate the number of moles of the compound in the solution, which can then be used to find the molar mass.
To calculate the number of moles of the compound, we used the formula: moles = concentration (M) x volume (L). This formula relates the concentration of a solution to the number of moles of solute present in a given volume of solution. By multiplying the concentration (given as 0.077 M) by the volume (0.25 L), we found that there were 0.01925 moles of the compound in the solution.
Once we knew the number of moles of the compound, we could use the formula for molar mass to find the mass of one mole of the compound. This formula is: molar mass = mass of compound / moles of compound. We were given the mass of the compound as 1.12 grams, so we divided this by the number of moles (0.01925) to get a molar mass of 58.2 g/mol.
In conclusion, by using the concentration of the solution and the mass of the compound added to it, we were able to calculate the molar mass of the unknown compound. This information can be useful in identifying the compound and understanding its properties.
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1.1 Which of the following statements is FALSE? As the temperature of the gas in the container increases,... A the molecules move more quickly. B the molecules expand. C the molecules collide more often. D the molecules move further apart.
Answer:
d is false
Explanation:
because when the Temperature of gas in the container increases the molecule increases or expands and collide
What is the pOH of water?
Answer:
A. 7
(assuming the water is neutral)
The bond line formula,
represents the molecular formula
C₂ H18
C₂H15
yes this is the right question
Describe the role of the ocean in the water cycle?
Answer:
Don't get me wrong the seas are, by distant, the biggest store of water on soil, over 96% of all of Earth's water exists within the seas. Not as it were do the seas give dissipated water to the water cycle, they moreover permit water to move all around the globe as sea streams. I mean, that's all i know man, give me a break.
Explanation:
3
Li
6.941
Atomic # =
Atomic Mass =
# of Protons =
# of Neutrons =
# of Electrons =
Answer:
36.94133.23Explanation:
pls mark brainliest
explain why you would expect the molar heat capacity at constant pressure of an ideal gas to be larger than the molar heat capacity at constant volume.
The thermal capacity under a certain pressure Since the substance expands and produces energy when heat is applied at a constant pressure, CP is greater than the heat capacity at constant volume CV.
Why does the first law of thermodynamics demonstrate that CP Cv R and that specific heat at constant pressure is greater than that at constant volume?In the first instance, the temperature of the gas must be raised with greater heat. Since it requires more energy to raise the temperature by one unit in the former situation, CP, or specific heat at constant pressure, is greater than CV, or specific heat at constant volume.
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What’s the correct answer ?
Answer:
Explanation:
i think c
The following data were collected from the gravimetric analysis of a hydrated salt: Complete the following table. (See Report Sheet.) See Data Analysis C, D for determining the standard deviation and relative standard deviation for a set of data. Express all of the calculated data with the correct number of significant figures (see Data Analysis A). Mass of hydrated salt(g) Mass of anhydrous salt(g) Mass of water lost(g) Percent by mass of volatile water in hydrated salt(%) Average percent H_2O in hydrated salt(%H_2O) Standard deviation of % H_2O Relative standard deviation of %H_2O in hydrated salt (%RSD)
Percent by mass of volatile water in hydrated salt (%): 32.7
Average percent H_2O in hydrated salt (% H_2O): 32.7
What is hydrated ?Hydration is the process of adding moisture or water to a substance, such as a plant or an animal, to keep it healthy. Hydration is essential for the optimal functioning of cells and organs in the body, and for maintaining the balance of fluids in the body. Hydration helps to keep the body’s temperature regulated, and helps to transport nutrients and other substances throughout the body. Hydration also helps to reduce fatigue and increase alertness.
It is important to stay hydrated by drinking plenty of water throughout the day. In addition to water, other drinks such as sports drinks, coconut water, and fruit juices can help to keep the body hydrated. Eating foods that have a high water content, such as fruits and vegetables, can also help to ensure adequate hydration.
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what questions should I expect on the Chemistry module 4 DBA?
(When I’m finished with the DBA I’ll answer this question but right now I need help)
Decomposition processes should appear here on Chemistry previous modules DBA, When I'm done with the DBA, I'll respond to this query.
How do you define reaction?Opposition or antagonism to a force, effect, or movement is a reactionary act, process, or occurrence. especially: a reaction to a particular treatment, circumstance, or stimulus; leaning toward a past and typically antiquated political or social system or policy.
What kinds of reactions are there?Combination, disintegration, single-replacement, twofold, and combustion are the five fundamental types of chemical reactions. You can classify a reaction into one of these groups by looking at the reactants and products.
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Answer: I was asked to classify equations, balance equations, and define + explain the law of conservation of mass
How many grams are in 4.2 X 10^2 moles of bromine?
Answer:
The answer is below:
Explanation:
3355.968
What are the uses of Diamonds?
your own answer
please help
Answer:
Diamonds are very important in our daily lives ,so therefore it has many uses
1.They are used ad beauty products
2.They are used in automative industry
3.They are used in making windows
4.They are used as medicine
8. Which has greater thermal energy: a glass of water
or a lake full of water? Why?
Answer:
Im assuming a glass of water
Explanation:
there is less water that needs to be heated up
find the molality of the solution if 35.0 g of propyl alcohol (ch3ch2 ch2oh) are dissolved in 200 g of water. 1.55 m 2.92 m 2.37 m 0.965 m
The molality of the solution is approximately 1.55 m. Therefore, the correct answer is A) 1.55 m.
To find the molality (m) of the solution, we need to determine the number of moles of the solute (propyl alcohol) and the mass of the solvent (water).
Given:
Mass of propyl alcohol (solute) = 35.0 g
Mass of water (solvent) = 200 g
Step 1: Convert the mass of propyl alcohol to moles.
First, we need to calculate the molar mass of propyl alcohol (C3H7OH):
C = 12.01 g/mol, H = 1.008 g/mol, O = 16.00 g/mol
Molar mass of propyl alcohol = (3 * 12.01 g/mol) + (8 * 1.008 g/mol) + 16.00 g/mol = 60.12 g/mol
Now, we can calculate the number of moles of propyl alcohol:
Number of moles of propyl alcohol = Mass of propyl alcohol / Molar mass of propyl alcohol
= 35.0 g / 60.12 g/mol
Step 2: Calculate the molality.
Molality (m) is defined as the number of moles of solute per kilogram of solvent.
Mass of water (in kg) = Mass of water (g) / 1000
Now we can calculate the molality:
Molality (m) = Number of moles of propyl alcohol / Mass of water (in kg)
= (35.0 g / 60.12 g/mol) / (200 g / 1000)
Simplifying the expression, we get:
Molality (m) = (35.0 g * 1000) / (60.12 g/mol * 200 g)
= 1.55 m (rounded to two decimal places)
Option A
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Arrange the following elements in order of decreasing ionization elements: Ba, Ra, Mg, Ca, Sr, Be
Answer: Ba, Sr, Ra, Ca, Mg, Be.
Explanation:
The ionization energy is the energy required to remove an electron from an atom or a positive ion. It is the energy required to overcome the electrostatic attraction between the electron and the positively charged nucleus. The ionization energy decreases as you move down a group (vertical column) in the periodic table. It also decreases as you move from left to right across a period (horizontal row) in the periodic table.
in a simple cubic unit cell, what is the size of a void at a surface center if the atomic radius is r. in simple cubic unit cell, all atoms are on the corner position and they are connected (touched) along the edge of a unit cell. i. 0.29r ii. 0.207r iii. 0.129r iv. 0.414r
The Size of a void ( Octahedral void ) at a surface center in simple cubic unit cell is 0.414r where r is atomic radius.
The smallest repeating unit in a crystal lattice is the unit cell, which is the building block of the crystal.
In a primitive cubic unit cell, atoms reside only at the corners. Each corner atom is shared by eight adjacent unit cells. There are 4 unit cells in the same layer and 4 unit cells in the top (or bottom) layer. So, there are only 1/8 of atoms in a given unit cell. This structure is called an open structure.
Each atom in a corner is shared by 8 adjacent unit cells 4 unit cells are in the same layer.
4 unit cells are in the upper/lower layer The
that exists therefore has a specific unit cell of exactly 1/8 of the atom. The center of the particle that occupies that particular position, rather than its size.
So, the total number of atoms in the unit cell is 8 × 1/8 = 1 atom. A simple unit cell contains 6 Octahedral void . We shall find out the size of Octahedral void.
let r be radius of atom and R be radius of Octahedral void.
Using Pythagoras theorem,
(2r)² = 2(R+r)² or (2r)²/2 = (R+r)² or 2r² = (R+r)²
(√2r)² = (R+r)² or √2 r = R+r or R = r(√2 -1 )
=> R = 0.414 r
Hence, the size of Octahedral void is 0.0414r.
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The purpose of a functional group is to increase the reactivity of a carbon chain. Another term for functionality is Question 7 options: A) oxidation. B) reduction. C) reactivity. D) polymerization.
Another term for functionality is reactivity
Functionality means is the presence of functional groups in a molecule and in organic chemistry functionality of a molecule has a decisive influence on its reactivity and a functional group are also the specific grouping of atom within the molecule that have their own characteristics properties of the other atom present in the molecule as well as common examples of functional groups are like alcohol, alkenes, alkynes, amines, carboxylic acid as well as aldehyde, ketone, ester called as functional group other name for functionality is reactivity so the another term is reactivity
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how are the foram fossils from the two time periods different?
Answer:
here are several resons that fossil foraminifera are especially valuable for determining the relative ages of marine rock layers. They have been around since the Cambrian, over 500 million years ago. They show fairly continuous evolutionary development, so different species are found at different times.
What volume of a 2.0M NaOH(aq) is needed to completely neutralize 24 milliliters of 0.5M HCl(aq)?
Show numerical setup and answer.
Answer:
\(V_{base}=6.0mL\)
Explanation:
Hello there!
In this case, by considering that the reaction between sodium hydroxide and hydrochloric acid is in a 1:1 mole ratio of these two reactants, we are able to use the following equation relating the concentration and volume of each one:
\(M_{acid}V_{acid}=M_{base}V_{base}\)
In such a way, by solving for the volume of the base, we will obtain:
\(V_{base}=\frac{M_{acid}V_{acid}}{M_{base}} \\\\V_{base}=\frac{0.5M*24mL}{2.0M}\\\\V_{base}=6.0mL\)
Regards!
Which is a mixture
H20
Salad
Table salt
Answer:
salad is a mixture this is the answer of the question
please mark ne has a brainliest
temperature to the nearest degree
Answer:
102 C
Explanation:
how many grams of oxygen are produced when 6.06 g of potassium chlorate decompose completely
Answer:
2.38 g of oxygen (O2).
Explanation:
What is given?
Mass of potassium chlorate (KClO3) = 6.06 g.
Molar mass of KClO3 = 122.4 g/mol.
Molar mass of oxygen (O2) = 32 g/mol.
Step-by-step solution:
First, let's state the balanced chemical equation. Remember that the decomposition of a compound produces two or more products:
\(2KClO_3\rightarrow2KCl+3O_2.\)Now, let's convert 6.06 g of KClO3 to moles using its molar mass:
\(6.06\text{ g KClO}_3\cdot\frac{1\text{ mol KClO}_3}{122.4\text{ g KClO}_3}=0.0495\text{ moles KClO}_3.\)You can see in the chemical equation that 2 moles of KClO3 produce 3 moles of O2. By doing a rule of three with this data, we obtain that:
\(0.0495\text{ moles KClO}_3\cdot\frac{3\text{ moles O}_2}{2\text{ moles KClO}_3}=0.0743\text{ moles O}_2.\)The final step is to convert from 0.0743 moles of O2 to grams using its molar mass, like this:
\(0.0743\text{ moles O}_2\cdot\frac{32\text{ g O}_2}{1\text{ }mol\text{ }O_2}=2.38\text{ g O}_2.\)The answer is that we will produce 2.38 g of oxygen (O2) from the decomposition of 6.06 g of potassium chlorate (KClO3).
please hurry
You discover a substance that is made of 10.6 g of Carbon and 4.4 g of Hydrogen.
(Use this to calculate empirical formula.)
The molar (molecular mass) of the compound is 68.204 g/mol.
(Use this when solving for molecular formula.)
What is the percent composition of this substance? (Make sure you percent has two (2) decimal places.)
What is the empirical formula of your substance? (Do not worry about making the numbers subscript).
What is the molecular formula of your substance? (Do not worry about making the numbers subscript).
please explain your answers
Explanation:
Elements contained. C. H
% by mass. 10.6. 4.4
/ each by its a.m. 10.6/12.0. 4.4/1.0
amount. 0.88. 4.4
/ each by the smaller. 0.88/0.88. 4.4/0.88
ratio of amount. 1.00. 5.00
simplest whole number ratio= 1 : 5
The empirical formula=CH5
Explain how a true acid wave, with a pH below 7.0, can cause the hair to swell.
Answer:
Services raise the pH in the hair to a alkaline state in order to soften and swell the hair shaft. Disulfide, hydrogen, salt. Side bonds are responsible for the strength and elasticity of the hair. Altering these is what make wet setting, thermal styling, permanent waving, curl reforming, and relaxing possible
A pH of 7 is neutral, a pH below 7 is acidic, and pH above 7 is alkaline. ... Chemical Texturizers raise the pH of the hair to an alkaline state in order to soften and swell the hair shaft. This action lifts the cuticle layer, and allows the solution to reach the cortex layer where restructuring takes place.
Explanation:
Calculate the pH of a solution with [H+] = 5.6 x 10^-8
Answer:
Approximately \(7.25\).
Explanation:
If the concentration of \({\rm H^{+}}\) ions in a solution is \(x\; {\rm M}\), the \({\rm pH}\) of that solution would be \((-\log_{10}(x))\).
Note that the base of the logarithm in this calculation should \(10\). One way to be sure is to state the base explicitly. Using the change of base rule of logarithms:
\(\begin{aligned}-\log_{10}(x) = -\frac{\ln(x)}{\ln(10)}\end{aligned}\).
In this question, it is implied that the concentration of \({\rm H^{+}}\) in the given solution is \(5.6 \times 10^{-8}\; {\rm M}\), such that \(x = 5.6 \times 10^{-8}\). Using the equations above:
\(\begin{aligned}& \text{pH of this solution} \\ =\; & -\log_{10}(x) \\ =\; & -\frac{\ln(x)}{\ln(10)} \\ =\; & -\frac{\ln(5.6 \times 10^{-8})}{\ln(10)} \\ \approx\; & 7.25\end{aligned}\).
g nickel can be plated from aqueous solution according to the following half reaction. how long would it take (in min) to plate 29.6 g of nickel at 4.7 a?
It would take 345.7 minutes in a plate.
Justification: It serves as an illustration of Faraday's First Law of Electrolysis.
According to this, the quantity of material deposited is directly inversely related to the quantity of voltage transmitted.
W=Zit, =E/96500, = E it/96500, and E=58.7 (molar mass of Ni)/2 (charge on Ni)=29.3 t=W96500/E I = 29.6x96500/29.3x4.7, = 20742.1 sec, = 345.7 min.
Nickel is it uncommon on Earth?It is the fifth most prevalent element on earth and is widely distributed throughout the crust and core of the planet. Along with iron, nickel is a frequent metal in meteorites and is also present in trace amounts in saltwater, plants, and animals.
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An atom with 13 total electrons and 3 valence electrons has
core electrons.
A) 2
B)8
C)16
D)10
Answer:
2
Explanation:
Each atom in the bond contributes one valence electron, forming a shared pair in a single covalent bond. Therefore, the correct option is option D.
What is valence electron?
A valence electron is an electron that is part of an atom's outer shell in chemistry and physics. If the outer shell is open, the valence electron can take part in the creation of a chemical bond.
The electrons in the s and p orbitals are those that are in question. Core electrons are those found in the inner shell. These electrons are vital to the majority of chemical processes because they have higher energy than the electrons in inner orbits. The electrons farthest from the nucleus are the electrons that are valence electrons of the atom. An atom with 13 total electrons and 3 valence electrons has 10 core electrons.
Therefore, the correct option is option D.
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