Answer:
I would first convert the grams of sodium into moles of sodium using its molar mass. Next, I would use the ratio of Sodium Chloride to Sodium in the given chemical equation to cancel out the moles of Sodium that I just obtained and get the moles of Sodium Chloride. Finally, using the molar mass of Sodium Chloride, I would cancel out the moles of Sodium Chloride to get the grams of Sodium Chloride.
Cice = 2.10 J/g·°C, Cwater = 4.18 J/g·°C,
Csteam = 2.08 J/g·°C, ∆Hfus = 6.01 kJ/mol,
∆Hvap = 40.68 kJ/mol.
Find the value for q when 15.0 g water freezes.
The heat absorbed when 15.0 g of water freezes is 5.01 kJ.
What is heat absorbed ?
Chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings.
The heat absorbed or released during a phase change can be calculated using the equation q = mL,
where
m is the mass of the substance undergoing the change L is its heat of fusion or vaporization.For the case of 15.0 g of water freezing, the heat absorbed can be calculated as follows:
q = mL
q = (15.0 g) * (6.01 kJ/mol) / (18.015 g/mol)
q = 5.01 kJ
Therefore, the heat absorbed when 15.0 g of water freezes is 5.01 kJ.
Learn more about heat absorbed here : brainly.com/question/30361927
#SPJ1
The sodium atom loses an electron to form a sodium ion (Na+). Which statement is correct with respect to its atomic radius? A. The sodium ion has a larger radius than the atom. B. The sodium ion has a smaller radius than the atom. C. The sodium ion and the sodium atom radii are the same size. D. The sodium ion has twice the radius of the sodium atom.
Answer:B. The sodium ion has a smaller radius than the atom.
Explanation:
Because size of cation is less than neutral atom
Balance each of the following chemical equations. Give your answer as coefficients separated by commas.
MnI2(aq)+AgNO3(aq)→AgI(s)+Mn(NO3)2(aq)
Express your answers as integers separated by commas.
The above balanced equation's coefficients are 1, 2, 2, 1. A chemical equation that is balanced has equal amounts of each material's atoms on the both sides of the issue and conserves mass.
How do chemical equations work?They are expressions that express chemical reactions using chemical formulae and symbols. In a balanced chemical, the reactants are represented on the left and indeed the products are displayed on the right.
The purpose of using chemical equations:The components and/or substances that are interacting, as well as the product(s), are described using biochemical equations. The molecular ratio or molecules ratio of something like the elements or molecules in the reaction is revealed by the equations on the compounds in the action.
To know more about chemical equations visit:
https://brainly.com/question/28294176
#SPJ4
Element Dy has 3 known isotopes. If.2% of the sample has a mass of 160
amu, .06% has a mass of 160.9 amu and the remaining has a mass 162
amu, what is the predicted mass of Dy?
Answer:
this girl in my class is getting a dog
Explanation:
but shes annoying so im hit her
Q-3 Determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and change in the chemical potential between this state and a second state od ethane where temperature is constant but pressure is 24 atm.
The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system. Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT
=> P
= nRT/V
=> 20.4 atm
= nRT/V
=> n/V
= 20.4/RT The chemical potential of the system at the initial state is:
Δu1 = RT ln (f/P)
= RT ln (f/20.4) Also, we know that for a pure substance,
Δu = Δg. So,
Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm
= 3.6 atm At the second state, the pressure is 24 atm.
Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is
Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)
= RT ln [(f/24)/(f/20.4)]
= RT ln (20.4/24)
= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:
f = P.exp(Δu/RT)
=> f
= 20.4 exp (-Δu1/RT)
=> f
= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
To know more about chemical potential visit:-
https://brainly.com/question/31100203
#SPJ11
2. Choose the atom from each of the following pairs with the greater ionization energy: a. Be and Ba b. Al and Ar c. Ca and Cl
Considering the definition of ionization energy, the highest ionization energy belongs to the element:
a. Be
b. Ar
c. Cl
Electrons are held in atoms by their attraction to the nucleus, which means that energy is needed to remove an electron from the atom.
You should keep in mind that the electrons of the last layer are always lost, because they are the weakest attracted to the nucleus.
Ionization energy, also called ionization potential, is the necessary energy that must be supplied to a neutral, gaseous, ground-state atom to remove an electron from an atom. When an electron is removed from a neutral atom, a cation with a charge equal to +1 is formed.
In a group, the ionization energy increases upwards because when passing from one element to the bottom, it contains one more layer of electrons. Therefore, the valence layer electrons, being further away from the nucleus, will be less attracted to it and it will cost less energy to pluck them.
In the same period, in general, it increases as you shift to the right. This is because the elements in this way have a tendency to gain electrons and therefore it will cost much more to tear them off than those on the left which, having few electrons in the last layer will cost them much less to lose them.
Considering all the above, from each of the pairs, the highest ionization energy belongs to the element:
a. Be
b. Ar
c. Cl
Learn more:
brainly.com/question/16243729?referrer=searchResults brainly.com/question/11623163?referrer=searchResults brainly.com/question/1602374?referrer=searchResultsin one or two sentences, describe the reaction of the residents of kansas to the lecompton constitution.
The residents of Kansas were overwhelmingly opposed to the Lecompton Constitution. This was large because the document protected slavery and allowed the state government to decide whether slavery should be allowed in the new state.
The people of the state saw this as an affront to their values and democratic rights and worked to defeat the constitution in a state referendum.
After much debate and campaigning, the Lecompton Constitution was defeated by over 10,000 votes. This was a major victory for antislavery advocates, who had worked hard to make sure the constitution was rejected in Kansas.
The residents of Kansas were overwhelmingly opposed to the Lecompton Constitution. This document was drafted by pro-slavery advocates and would have made slavery a permanent institution in the state.
The citizens of Kansas were furious, and it sparked a great deal of debate and conflict. Many residents were so opposed to the document that they decided to form an independent government and reject the Lecompton Constitution in a referendum.
The referendum passed in an overwhelming majority, and the Lecompton Constitution was rejected. This event was a major milestone in the struggle for free-state rights in the Midwest and demonstrated the power of the people to resist oppressive legislation.
To know more about the Lecompton constitution, click below:
https://brainly.com/question/8007282
#SPJ4
Which is most likely a reason why most reptiles fail to give their offspring parental care after laying the eggs?
Answer:
The eggs have tough shells that provide protection until the eggs hatch.
Explanation:
They are able to walk about on their own, but they are defenseless against egg eaters. Even so, most reptile progenitors contribute no attention to their hatch-lings. In fact, most reptiles don't even take custody of their eggs. ... They may protect their nest from predators and maintain the hatch-lings move to the water.
If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure? responses.
Butane is the gas that will condense at the lowest pressure.
Condensation is the process through which matter transitions from its initial gaseous state into its final liquid state. For instance, condensation happens when water vapour in the air, which is in its gaseous state, comes into touch with a colder surface and turns into liquid water.
The process of condensation, which is the reverse of evaporation, converts airborne water vapor to liquid water. Because it causes clouds to develop, condensation is essential to the water cycle.
When warm air meets cold surfaces or when your home is too humid, condensation happens. This moisture-rich heated air immediately cools down and releases the water, which condenses into liquid droplets on the chilly surface when it comes into contact with it.
Learn more about condensing temperature here https://brainly.com/question/15563071
#SPJ4
Will give brilliantiest!!
can energy produce more carbon dioxide?
different fuels emit different amounts of carbon dioxide in relation to the energy they produce when burned to analyze
the initial bond formation in the covalent intermediate in the reaction catalyzed by chymotrypsin is between
The initial bond formation in this covalent intermediate is between the carbonyl carbon of the peptide bond and the oxygen atom of the serine hydroxyl group.
The reaction catalyzed by chymotrypsin is a hydrolysis reaction that breaks peptide bonds in proteins. The active site of chymotrypsin contains a serine residue that acts as a nucleophile in the reaction.
The first step in the reaction involves the formation of a covalent intermediate between the serine residue in chymotrypsin and the peptide substrate. This covalent intermediate is formed by the attack of the serine hydroxyl group on the carbonyl carbon of the peptide bond, resulting in the formation of a tetrahedral intermediate.
The initial bond formation in this covalent intermediate is between the carbonyl carbon of the peptide bond and the oxygen atom of the serine hydroxyl group. This bond formation results in the cleavage of the peptide bond and the formation of a new acyl-enzyme intermediate.
The acyl-enzyme intermediate is then attacked by a water molecule, which leads to the hydrolysis of the peptide bond and the release of the products. The active site of chymotrypsin plays a crucial role in facilitating this reaction and enhancing the rate of the reaction.
To learn more about reaction intermediate, click here: https://brainly.com/question/30592542
#SPJ4
NEED ANSWER FAST !!
Using the following equation,
a. Balance the equation by putting the smallest whole number coefficient in each blank
Fe2O3 + H2 à Fe + H2O
b. Use the balanced equation to calculate how many grams of iron can be made from 0.025 mol of Fe2O3
Answer: grams Fe (Round your answer to the nearest hundreths)
Answer:
.-.
Explanation:
I am a Non reactive, non metal, with 8 Valence electrons. What element am I?
Answer:
noble gases
Explanation:
Se diluyen 50.0 ml de solución acuosa de na2so4 al 8.0%m/v hasta obtener 0.800 l de solución.Calcular concentracion de la solución expresada en m/v y M
Answer:
0.5%m/V y 0.0352M.
Explanation:
El %m/V se define como la masa de soluto (Na2SO4 en este caso) en 100mL de solución.
La molaridad de esta solución son las moles de Na2SO4 por litro de solución
La solución original se diluye de 50.0mL a 0.800L = 800mL. Esto es una dilución de:
800mL / 50.0mL = 16 veces
Como la concentración original es de 8.0%m/V, la de la dilución será:
8.0%m/V / 16 = 0.5%m/V
Esto significa que en 100mL = 0.1L hay 0.5g. Para hallar la molaridad debemos convertir estos 0.5g a moles con la masa molar del Na2SO4 = 142.04g/mol:
0.5g * (1mol / 142.04g) = 0.00352 moles Na2SO4 en 0.1L:
0.00352 moles / 0.1L =
0.0352M
consider the chemical reaction nh4 (aq) no3-(aq) → n2(g) 2h2o(l). image the rate law for this reaction is:
The rate law for the chemical reaction NH4+(aq) + NO3-(aq) → N2(g) + 2H2O(l) is :
Rate = k[NH4+][NO3-]
For the chemical reaction NH4+(aq) + NO3-(aq) → N2(g) + 2H2O(l), let's determine the rate law.
The rate law for this reaction is:
Rate = k[NH4+][NO3-]
In this rate law:
- "Rate" represents the rate of the chemical reaction.
- "k" is the rate constant, which is specific to the reaction and depends on factors such as temperature.
- [NH4+] and [NO3-] represent the concentrations of NH4+ and NO3- ions in the reaction, respectively.
The rate law helps us understand how the concentrations of reactants affect the rate of a chemical reaction.
To learn more about rate law : https://brainly.com/question/16981791
#SPJ11
what is the percent yield of sulfur dioxide if the burning of 25.0 g of carbon disulfide produces 40.5 g of sulfur dioxide?
Answer:
25-54-46-36 619-73 77-88-50
What does the radical do in a seed of a plant
\(\huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}} \)
It is the embryonic root inside the seed. It is the first thing to emerge from a seed and down into the ground to allow the seed to suck up water and send out its leaves so that it can start photosynthesizing. The radicle emerges from a seed through the micropyle.a solution of acetic acid that has a concentration of 0.10 moles per liter has a ph of 2.87. what is the likely ph of a 0.10 mole per liter solution of the conjugate base sodium acetate?
0.10 moles per liter solution of the conjugate base sodium acetate is likely to have a pH greater than 7.
Is the pH of a 0.10 mole per liter solution of the conjugate base sodium acetate likely to be acidic or basic?When acetic acid (CH3COOH) donates a proton, it forms its conjugate base, acetate ion (CH3COO-). In the given scenario, the acetic acid solution has a pH of 2.87, indicating acidity. The lower pH value suggests a higher concentration of H+ ions. As a weak acid, acetic acid partially dissociates, releasing H+ ions and acetate ions. When sodium acetate (CH3COONa) dissolves in water, it completely dissociates into sodium ions (Na+) and acetate ions. The presence of acetate ions (the conjugate base) from sodium acetate will react with the excess H+ ions in the solution, shifting the equilibrium towards the formation of acetic acid and water. This process, called the hydrolysis of salts, will consume the H+ ions, thereby increasing the pH of the solution. Consequently, the 0.10 mole per liter solution of sodium acetate is likely to have a pH greater than 7, making it basic.
Learn more about pH
brainly.com/question/2288405
#SPJ11
what is chemical bonding
Answer:
Chemical bonding - a mutual adhesion of atoms in an molecule and the crystal lattice.
Explanation:
Answer:
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.
what atom has a greater number of neutrons
Answer:
livermorium
Explanation:
The atom with the largest number of neutrons is a tie between livermorium and tennessine. Each of these atoms contain 177 neutrons.
T/F. the branch of chemistry that studies changes is called thermodynamics.
The branch which deals with the physical changes of substances is called physical chemistry. Thermodynamics is the branch of chemistry that deals with the heat changes in the substance. Hence, the statement is false.
What is thermodynamics ?Thermodynamics is a branch of chemistry that deals with the heat changes of a system. Thermos means temperature and dynamics means changes. It includes the enthalpy, entropy, Gibbs energy, internal energy, work done etc.
Physical chemistry, biochemistry, chemical engineering, mechanical engineering, and other complicated subjects like meteorology are just a few of the topics in science and engineering where thermodynamics is relevant.
The study of chemical compounds and chemical reactions swiftly followed the initial application of thermodynamics to mechanical heat engines.
The majority of the advancement and understanding in the discipline has come from the study of chemical thermodynamics, which examines the nature of the function of entropy in the course of chemical reactions. Hence, the statement is incorrect.
Find more on thermodynamics:
https://brainly.com/question/30207871
#SPJ1
how many molecules of co2 in 97.3 grams of co2
Answer:
1.33 × 10²⁴ molecules CO₂
General Formulas and Concepts:
Chemistry - Stoichiometry
Reading a Periodic TableDimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
97.3 g CO₂
Step 2: Define conversions
Avogadro's Number
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of CO₂ - 12.01 + 2(16.00) = 44.01 g/mol
Step 3: Convert
\(97.3 \ g \ CO_2(\frac{1 \ mol \ CO_2}{44.01 \ g \ CO_2} )(\frac{6.022 \cdot 10^{23} \ molecules \ CO_2}{1 \ mol \ CO_2} )\) = 1.33138 × 10²⁴ molecules CO₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules.
1.33138 × 10²⁴ molecules CO₂ ≈ 1.33 × 10²⁴ molecules CO₂
What is an ionic solid?
A. A crystalline solid held together by a shared electron pool
B. A crystalline solid held together by dipole-dipole forces
C. A crystalline olid held together by covalent bonds
D. A crystalline solid held together by charge attractions
Answer:
D
Explanation:
An ionic solid is a crystalline solid held together by charge attractionsAn example is a salt crystal (Na⁺ + Cl⁻ → NaCl)An ionic solid is a crystalline solid held together by charge attractions or an ionic bond.
What is an ionic bond?
Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of heat and electricity. They have high melting points. These compounds are brittle.
Learn more about ionic bond,here:
https://brainly.com/question/11527546
#SPJ2
Carbon monoxide is colorless, odorless and tasteless.
A. True
B. False
Answer: A. True
Explanation:
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas. It is produced by the incomplete burning of fuels such as natural gas, propane, oil, wood, and coal. It has no smell, taste, or color, and it can be difficult to detect, which is why it can be dangerous. Carbon monoxide can cause symptoms such as headache, dizziness, nausea, and fatigue, and can be fatal if inhaled in large quantities. It's important to have a Carbon monoxide detector in homes and buildings to detect any possible leakage.Answer:
Explanation:
S0lution:- (A)TRUE, Carbon monoxide(CO) is a colorless,odorless and tasteless toxic gas.it was first discovered by de Lassone it consists of covalent bonds.Liquid to Gas =
Solid to Liquid =
The process of a liquid becoming a gas is called boiling (or vapourization) and the process of a solid becoming a liquid is called melting.
Vaporization is the process of converting a liquid into a gas. It is also called evaporation. Since we know that the particles of a gas are moving faster than those of a liquid, an input of energy must be required for a liquid to become a gas.
Melting is a physical process that results in the phase transition of a substance from a solid to a liquid. During melting, the energy goes exclusively to changing the phase of a substance; it does not go into changing the temperature of a substance. Hence melting is an isothermal process because a substance stays at the same temperature.
Example 1: Industrially, salt is recovered from seawater by the process of vaporization. Wet clothes are dried up due to the process of vaporization. The process is used in many industrial processes for separating the components of a mixture.
Example 2: Ice to water - Ice melts back into the water when it is left out at temperatures above the freezing point of 32 degrees. Rocks to lava - Rocks in volcanoes can be heated until they are molten lava. Metal to molten liquid - Metals such as steel and bronze can be molten down.
To learn more about vaporization and melting visit,
https://brainly.com/question/17945501
A box is 1 m high, 2.5 m long, and 1.5 m wide, its volume is 5 mº.
true or false
Answer:
false
Explanation:
Because volume is in m3
Answer:
False
Correct answer: 3.75m³
Explanation:
Given parameters:
Height of box = 1m
Length of box = 2.5m
Width of box = 1.5m
Unknown:
Volume of the box = ?
Solution:
The volume of the box is given as:
Volume = length x height x width
Volume = 2.5 x 1 x 1.5
Volume = 3.75m³
How does the smell of the cooked food reach your nostrils without entering the kitchen?
Answer:
The smell of cooked food reaches our nostrils because particles of the aroma of food mix with the particles of the air and reach our nostrils through diffusion.
Identify: How are properties of matter classified?
how do calcium and fluorine become stable when they form calcium fluoride?
Answer:
Explanation:
It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities. ... Calcium reacts with fluorine to form the compound CaF2. ... (lead is very close) as hydrogen the bond would be considered ionic! ... What is the most stable monatomic ion formed from nitrogen?
Answer:
CaF2 is stable when it is formed because Ca loses two of its electrons. Both accept one electron each. now the Calcium is satisfied because it lost its two electrons and is now behaving like a noble gas, which is what they all want to be like The Flourine is satisfied because they both gained one electron, allowing them to have 8 valence electrons also like a noble gas.
The key is in the 8 valence electrons! Ca has to lose two to have 8, and F has to gain one to have 8fluorinefluorines...
Explanation:
how many particles would be found in 1.224 g sample of K2O?
Answer:
7.8286×10^21 particles
Explanation:
atomic mass of potassium = 39.1 u
1 u = 1 g/mol
Potassium (K) = 39.1 g/mol × 2 = 78.2 g/mol
Oxygen (O) = 16 g/mol × 1 = 16 g/mol
K₂O = 94.2 g/mol
1.224 g / 94.2 g/mol = .013 moles
Avogadro's number = 6.022×10²³
particles = moles x Avogadro's number
particles = .013 moles x 6.022×10^23
particles = 7.8286×10^21 particles
https://brainly.com/question/12867103
socratic