What is the molarity of a solution prepared by dissolving.
Answer:
The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.
What is a decomposition reaction?
Answer:
The process or effect of simplifying a single chemical entity into two or more fragments.
Explanation:
Chemical decomposition, or chemical breakdown, is the process or effect of simplifying a single chemical entity into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis.
Answer:
What are some examples of decomposition reactions?
Production of calcium oxide or quicklime.
Production of lithium oxide.
Preparation of oxygen and carbon dioxide.
In metallurgy, for the extraction of metals from their oxides and chlorides through electrolytic decomposition.
Which unit is used for specific heat capacity?
Answer:
J/gm-C
Explanation:
J/gm-C is one set of units for specific heat
which subatomic particle accounts for magnetism ?
Answer:
Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom. Their movement generates an electric current and causes each electron to act like a microscopic magnet
Explanation:
trust me
The first-order rate constant for the decomposition of n2o5,2n2o5(g)→4no2(g) o2(g)at 70∘c is 6. 82×10−3 s−1. Suppose we start with 2. 60×10−2 mol of n2o5(g) in a volume of 2. 0 l
A decomposition reaction is the breakdown of reactants into two or more products. The concentration of dinitrogen pentoxide after 4 minutes will be 1.63 moles.
What is the first-order rate constant?The first-order rate constant (k) is the order of the reaction that is the initial rate and is given as 1/s.
The first order is shown as:
[tex]\rm [ln] A = \rm ln [A]_{o} - kt[/tex]
Given,
Initial concentration = 0.013 M
k = [tex]6.82 \times 10^{-3}\;\rm s^{-1}[/tex]
t = 240 seconds
Substituting values above:
[tex]\begin{aligned} \rm [ln] A &= \rm ln[0.013] - 9 6.82\times 10^{-3} \times 240)\\\\[A] &= \rm e^{ln[0.013]} - (6.82 \times 10^{-3} s^{-1} \times 240 s)\\\\& = 1.6238\end{aligned}[/tex]
Therefore, 1.63 moles will remain after 4 minutes.
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Chemistry helpppp
Which of the following amines has the highest melting point?
A. CH3CH2CH2NH2
B. CH3CH2CH2CH2NH2
C. CH3CH2CH(CH3)NH2
D. CH3CH(CH3)CH2NH2
Answer: c, and my yt is ChezBeed
Explanation:
Energy is gained or removed to break chemical bonds?
Answer:
it is removed In all types of chemical reactions, bonds are broken and reassembled to form new products. However, in exothermic, endothermic, and all chemical reactions, it takes energy to break the existing chemical bonds and energy is released when the new bonds form.
Explanation:
hope this helps if not let me know have a blessed day
Answer:
I don't now the answer but you can give branaillest to the other person how answered it
Explanation:
two human actions needed to slow climate change
Answer:
using electric cars , Transitioning to energy sources that do not emit greenhouse gases, such as solar, wind, biofuels, and nuclear ☢️
Explanation:
At what speed does every type of electromagnetic radiation travel?
Answer:
All waves of the electromagnetic spectrum have a speed of 3 × 10⁸ ms⁻¹
What is the number of collaborative relationships he creates
Each of the carbon atoms in fullerene
Answer:
answer is 60
Explanation:
Which of the following changes would result in an increase of nitrogen dioxide, NO2?
N204() <---> 2NO2(g)
AH° = 58 kJ
This can be solved according to Le C ha.tellors principle
Any change in concentration, temperature, pressure can shift the equilibriumSo
Here to increase NO_2
We need to increase the temperature or increase the concentrations of reactants
The addition of N₂O₄(g) to the system would result in an increase of nitrogen dioxide, NO₂.
The balanced equation provided shows the equilibrium between nitrogen dioxide (NO₂) and dinitrogen tetroxide (N₂O₄). According to Le Chatelier's principle, a change in conditions will cause the system to shift in a way that opposes the change. In this case, if N₂O₄ is added to the system, the equilibrium will shift to the right to consume the added N₂O₄ and produce more NO₂.
Based on the given information, the enthalpy change (AH°) for the reaction is 58 kJ. This indicates that the forward reaction (from N₂O₄ to 2NO₂) is endothermic, meaning it requires heat to proceed. Adding N₂O₄ to the system will provide more reactant molecules, increasing the concentration of N₂O₄ and causing the equilibrium to shift towards the products (more NO₂) to minimize the effect of the added N₂O₄.
Therefore, the addition of N₂O₄ to the system will result in an increase in nitrogen dioxide, NO₂, as the equilibrium shifts to the right to restore equilibrium.
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Which of the following is a solution?
A)
milk
B)
salt water
C)
chlorine
D)
muddy water
Explanation:
b. salt water is the correct answer
Which of the following is a solution?
A) milk
B) salt water
C) chlorine
D) muddy water
✭ Explanation -:What is a solvent ?
A liquid that can dissolved in a solution.
What is a solute ?
A substance that is dissolved in a solution.
What is a solution ?
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
Opition a)
Milk is not a solution. Milk is a mixture because milk has more than one phase suspended in it. Milk is a mixture of water, lipids, fats, proteins, and carbohydrates, as well as other substances.
Opition a is not the correct answer
Opition b)
Salt water is a solution. It is a solution because salt particles completely dissolve in water.
Opition b is the correct answer
Opition c)
Chlorine gas is an element. An element is a pure substance that consists of only one type of particle.
Opition d)
Muddy water is not a solution.It is a mixture. Solid dust and liquid have been mixed but the two but the two are not mixed on a molecular scale to form one state.
Opition d is not the correct answer
Hence Opition b) is a solution.For the reactions listed below, decide whether the reaction would increase, decrease, or stay the same.
The rate of the reaction is the speed at which the reactants are used to produce the products. An increase in temperature and concentration of the reactant increases the rate of reaction.
What are the factors affecting the rate of reaction?The rate of the reaction is the speed at which the products are used to produce products. The rate increases when the concentration of the reactants in a reaction is increased. Also, the smaller grounded pieces of reactants increase the reaction rate as the surface area gets increases.
The rise in temperature and the addition of the catalyst also increases the rate of reaction as temperature and the catalysts increase the chemical reaction by increasing the speed.
When an inhibitor is added to a reaction then the rate of the reaction decreases as they inhibit the formation of the products and block the reaction pathways.
Therefore, the inhibitors decrease the rate of the reaction.
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THURSDAY Mr. Pate's science class performed an experiment involving the chemical reaction of sodium bicarbonate (baking soda) and vinegar. Students poured 50 mL vinegar into a small bottle, then added sodium bicarbonate to a balloon. They attached the balloon to the bottle and dumped the sodium bicarbonate into the bottle. The resulting reaction produced carbon dioxide gas, which filled the balloon. Lanie hypothesized that the more sodium bicarbonate that was added to the vinegar, the bigger the balloon would get. Victor hypothesized that more than 8 g of sodium bicarbonate would cause the balloon to pop. . The Effects of Sodium Bicarbonate Levels on Gas Production in 1. Was Lanie's hypothesis correct? a Chemical Reaction Explain your answer. Trial 1 Trial 2 Trial 3 Trial 4 2. Was Victor's hypothesis correct? Explain your answer, Mass of Sodium Bicarbonate 59 7. 5 9 2003. What could the students expect Added the balloon circumference to be if Balloon 12. 5 g of sodium bicarbonate were 30 cm 38 cm 44cm 51 cm Circumference added? 2. 5 g 10 9
The balloon will burst if the volume of the balloon is less than 1.68 L since 8 g of sodium bicarbonate produces 1.68 L of carbon dioxide gas.
What is the volume of carbin dioxude produced from the chemical reaction between sodium bicarbonate (baking soda) and vinegar?The volume of carbon dioxide produced is obtained from the equation below:
[tex]CH_3COOH + NaCO_3 \rightarrow CH_3COONa + H_2O + CO_2 \\ [/tex]
1 mole of sodium bicarbonate reacts with one mole of acetic acid in vinegar to produce 1 mole of carbon dioxide.
The volume of 1 mole of carbon dioxide is 22.4 L
Moles of sodium bicarbonate in 8 g = mass/molar mass
molar mass of sodium bicarbonate = 106 g
moles of sodium bicarbonate = 8/106 = 0.075 moles
Moles of carbon dioxide produced = 0.075 moles
Volume of carbon dioxide = 0.075 × 22.4 = 1.68 L
Therefore, the balloon will burst if the volume of the balloon is less than 1.68 L.
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Avogadro's number represents the number of units in a mole. What is this value?
o
3.01 x 1023
o 6.02 x 1023
1.20 x 1024
3.60 x 1024
The value of Avogadro's number is:
[tex]N = 6.02214076*10^{23}[/tex]
So the correct option is the second one.
What is the value of Avogadro's number?Avogadro's number represents the number of molecules in a mole.
The value of the Avogadro's number is such that the mass of one mole of a compound is numerically equal to the mass of that compound in daltons.
And, by definition, Avogadro's number is:
[tex]N = 6.02214076*10^{23}[/tex]
With this in mind, we conclude that the correct option is the second one.
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Answer:
BExplanation:
6.02x10^23
answer this question
Answer:
To test the presence of Carbon (iv) oxide in soili String ii Conical flask A white precipitate will be seen in the conical flaskCO2 in soil reacts with lime water to form calcium carbonate which is an insoluble white precipitatethere is no observable change since lime water remains colorless C02 + Ca(OH)2------------> CaCO3 + H20Explanation:
in set up A the fresh soil contains carbon (iv) oxide which reacts with lime water to form an insoluble white precipitate of calcium carbonate. In set up B carbon (iv) oxide is not present in the soil since it has been boiled the gas has been expelled. Therefore there is no observable change in B
Water Resources
Short Writing
Answer:
Water is one of the most precious resources the earth provides to mankind. Its use in modern age is manifold. We drink water to satisfy our thirst. We use it for domestic needs, irrigation, industrial use, transportation, power production and waste disposal. Water is universal solvent.
Thanks to our nature; it is very rich in water. About three-fourth of the earth's surface is covered with water. But only a small portion of total water resources is actually available for human use. Majority, about 97.3% is present in oceans and is salty in nature.
The fresh water constitutes only 2.7%. Out of this, inland" surface waters i.e. lakes, rivers, and ponds account for hardly 0.02%. This relatively negligible portion of the earth's water is crucially important to all form of terrestrial and freshwater aquatic life. We get water mainly from three sources;
1 Rain water.
2 Surface water
3 Ground water
If the volume at 110.0kPa is 524cm 3 , what will the new volume be if the pressure is changed to 104.5kPa?
By applying Boyle's law, the new volume of this ideal gas is equal to 551.58 cm³.
Given the following data:
Initial volume = 524 cm³.New pressure = 104.5 kPa.Initial pressure = 110.0 kPa.How to calculate the new volume?In order to determine the new volume of this ideal gas, we would apply Boyle's law.
Mathematically, Boyle's law is given by this formula:
PV = k
P₁V₁ = P₂V₂
Where:
P represents the pressure.V represents the volume.Making V₂ the subject of formula, we have:
V₂ = (P₁V₁)/P₂
Substituting the given parameters into the formula, we have;
V₂ = (110.0 × 524)/104.5
V₂ = 57,640/104.5
V₂ = 551.58 cm³
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The volume of a sample of a gas at 0°c is 100 liters. If the volume of the gas is increased to 200 liters at constant pressure, what is the new temperature of the gas in degrees kelvin?
The volume of a sample of a gas at 0°c is 100 liters, if the volume of the gas is increased to 200 L at constant pressure, then new temperature is 546K.
What is the relation between volume and temperature?Relation between the volume and temperature of any gas will be explained by using the ideal gas equation:
PV = nRT
Means volume and temperature is directly proportional to each other & for this question equation becomes:
V₁/T₁ = V₂/T₂, where
On putting all these values on the above equation, we get
T₂ = (200)(273) / (100) = 546 K
Hence resultant temperature of the gas is 546 K.
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Match the following polyatomic lons.
(Refer to picture)
Answer:
1 Nitrate
2 sulphate
3 ammonium
4 carbonate
5 permanganate
6 phosphate
7 acetate
8 chromate
9 dichromate
10 sulphite
A weather balloon was initially at a pressure of 0.900 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, without loss of gas or change in temperature. What was the change in the volume?
Boyle's Law
P₁V₁=P₂V₂
0.9 x 35 = 0.75 x V₂
V₂ = 42 L
What is the critical angle for total internal reflection at the water-ice interface?
The value of the critical angle for total internal reflection at the water-ice interface is 48.6 degrees.
What is critical angel?The greatest angle at which a beam of light traveling through one transparent media can strike the border between that medium and a second of lower refractive index without being completely reflected within the first medium is called the critical angle in optics.
So the value of the critical angle for total internal reflection at the water-ice interface is 48.6 degrees.
Hence the resultant critical angel is 48.6 degrees.
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Which diagram shows the correct electron configuration for fluorine (F)?
A group of five short lines. The first line has an up and a down arrow above it and is labeled 1 s below. The second line has an up and a down arrow and is labeled 2 s. The third and fourth lines each have an up and a down arrow; the fifth line has an up arrow . The third, fourth, and fifth lines are bracketed with the label 2 p.
A group of five short lines. the first line has an up and a down arrow, and is labeled 1 s. The second has an up and a down arrow and is labeled 2 s. The third has an up and a down arrow, the fourth has an up, a down, and an up arrow, and the fifth has no arrow. The third, fourth, and fifth lines are bracketed and labeled 2 p.
A group of five short lines. The first line has an up, a down, and an up arrow and is labeled 1 s. The second line has an up, a down, and an up arrow and is labeled 2 s. The third, fourth, and fifth lines all have up arrows, and are bracketed with the label 2 p.
Answer:
it's A
Explanation:
The given element is, fluorine is a non-metal with symbol (F). It is a gas and belongs to the group 17 and period 2.
The atomic number of fluorine = 9
The number of electrons = 9
Answer:
its the first one... sorry for the wait was doing my homework :)
A radioactive sample contains 1.60 g of an isotope with a half-life of 3.9 days. part a what mass of the isotope will remain after 5.6 days? (assume no excretion of the nuclide from the body.)
Answer:
.59 g
Explanation:
5.6 d / 3.9 d /half life = 1.436 half lives
(1/2)^1.436 = .3696 of original left
.3696 * 1.6 = .59 gm
How many grams of H2O will be produced if 750. grams of Fe are produced?
Fe3O4 + 4H2 - 3Fe + 4H20
Answer:
[tex]\boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}[/tex]
Explanation:
Given:
Mass of ferous (Fe) produced = 750 gram.
To find:
Mass of water produced= ?
Solution:
Molar mass of Fe is 55.84 gram/mol
Let's find out the number of moles of ferous produced.
[tex] \small \sf Number \: of \: moles = \frac{Given \: mass \: of \: substance }{Molar \: mass \: of \: substance} [/tex]
Substituting the given data in above formula.
[tex] \small \sf Number \: of \: moles = \frac{750}{55.84} [/tex]
[tex] \boxed{\small \sf Number \: of \: moles \: of \: Fe= 13.43 \: moles}[/tex]
Now the given reaction is,
[tex]Fe_3O_4 + 4H_2 \rightarrow 3Fe + 4H_2O[/tex]
For every 3 mole of production of Fe, 4 mole of waters are produced. let for 13.43 moles of Fe x moles of H2O will be produced.now calculate the number of moles of H2O
[tex] \sf \: \frac{3}{4} = \frac{13.43}{x} \\ \sf x = \frac{13.43 \times 4}{3} \\ \sf x = 17.90 \: moles[/tex]
[tex] \small \boxed{\sf number \: of \: moles \: of \: H_2O= 17.90 \: moles}[/tex]
mass of one mole of H2O is 18 gram, so we can calculate mass of 17.90 moles.
[tex]\small \sf \: Mass \: of \: H_2O = 17.90 \times 18 \\ \boxed{\small \sf \: Mass \: of \: H_2O =322.2 \: grams}[/tex]
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What foods of the aztec found their way into mayan cooking?.
Avocados and tomatoes were mainly eaten by the Aztecs and Maya.
How did Mayans cook their food?"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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CH2Br
The bond line formula,
represents the molecular formula
Br
A
B
CH₂ Brz
CH₂ Brz
Answer: C7H6Br2
Explanation:
i got it right on acellus
A chemical ____ is a shorthand way to sum up what occurs in a chemical reaction
Answer:
equation
Explanation:
What is the Molar Mass of methylammonium bromide: Use the Periodic Table and round to the nearest hundredths.
The molar mass of methylammonium bromide is 111u.
What is molar mass?The molar mass is defined as the mass per unit amount of substance of a given chemical entity.
Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.
Add it all together and put units of grams/mole after the number.
Atomic weight of H is 1u
Atomic weight of N is 14u
Atomic weight of C is 12u
Atomic weight of Br is 79u
Calculating molar mass of [tex]2H_3NCH_3Br[/tex] =2(1 x3+ 14+12+ 1 x 3 +79) = 111u
Hence, the molar mass of methylammonium bromide is 111u.
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On the fahrenheit scale, at what temperature does water boil? a. 451°f b. 264°f c. 212°f d. 100°f
The temperature that water boils on the fahrenheit scale is c. 212°f.
What is Temperature conversation?Temperature conversation is a way of converting a temperature from a unit to another using conversation scale.
Therefore, on fahrenheit scale water boils at 212°f which is equivalent to 100°C on the Celcius scale.
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