C) decrease
hydrochloric acid: strong acid, pH <7
sodium hydroxide: strong base, pH>7
31. Can two (or more) types of matter occupy the same space at the same time?
32. What is hardest state of matter?
33. What is the softest state of matter?
Evaluate what advantage Bronsted-Lowry base theory has over the Arrhenius base theory.
A) The Bronsted-Lowry bases can act as proton acceptors.
B) Bronsted-Lowry bases act as hydroxide ion acceptors.
C) Both hydroxide and hydronium ions are released as Bronsted-Lowry bases.
D) Hydroxide ions are the only Bronsted-Lowry bases produced in solution.
The advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.
What are Bronsted-Lowry bases?According to the definition of Bronsted-Lowry, a base is a proton acceptor. In that case, the concept of bases is not limited to only the hydroxide ions.
Thus the advantage of Bronsted-Lowry base theory over the Arrhenius base theory is that the Bronsted-Lowry bases can act as proton acceptors.
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formation of water: 2H2 + 102 --> 2H20
How many moles of H2O can be produced from 7 moles of H2?
Help me please Answer or I’ll report
Answer:
It takes 7 mol H2 to produce 7 mol H2O
Explanation:
In 2H2O, there's 2 moles of H2 for every 1 mol O2.
So, if oxygen is limiting you'd only be able to produce 2 moles of H2O. I don't know if the question implies that, so it could also be that 7 mol H2 makes 7 mol H2O. Sorry for the confusion, I hope it helps a bit
The diagram shows that the potential energy of the products is lower
than the potential energy of the reactants. Which type of reaction is
shown?
(Once it hits the top of the hill it says activation energy
Once it hits the bottom to the word products it says heat of reaction)
A: this is an exothermic reaction because the reactants have less energy than the products
B: this is an endothermic reaction because the reactants have more energy than the products
C: this is an endothermic reaction because the reactants have less energy than the products
D: this is an exothermic reaction because the reactants have more energy than the products
Answer: D
Explanation:
How many grams is 3.2 moles of water
Answer:
similarly 1 mole of water is equivalent to molecular mass of water x 3 that is 18x3=54 gram
Explanation:
how many neutrons does zinc have
Answer:
The number of protons is 30. Substitute the known values, where N represents the number of neutrons. Let's rewrite the equation as 30+N=65 30 + N = 65 .
Answer:
35 neutrons
Step by step explanation:
Atomic mass of Zinc: 65 amu (atomic mass units)
Number of protons in Zinc: 30
Number of neutrons in Zinc: Atomic mass of Zinc - Number of protons in Zinc = 65-30 = 35 neutrons.
Therefore, zinc atoms have 35 neutrons.
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Balanced chemical equation for the combustion of biodiesel
The balanced equation for the combustion of biodiesel is CH₄ + 2O₂ = CO₂ + H₂O.
What is combustion reactions?Combustion reaction is the reaction in which a substance react with oxygen to produce energy and heat. It is an exothermic reaction.
The combustion of biodiesel with oxygen form carbon dioxide and water.
Thus, the balanced equation for the combustion of biodiesel is CH₄ + 2O₂ = CO₂ + H₂O.
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An atom was observed with +3 charge, n = 38, and e = 28. What is the mass number of the atom?
A. 66
B. 69
C. 72
D. 63
Answer: 66
Explanation: To find the mass number you would have to add the number of protons and the number of neutrons.
Chemistry
Bellringer: Find the mass of 5.78 moles of carbon
dioxide.
Answer:
254.32
Explanation:
The formula to calculate mass is:
no. of moles ×molar mass. and the molar mass of carbon dioxide is 44
Use the equation to answer the prompt. A student claims that the equation models beta-minus decay because the atomic number of the nucleus decreases by one. In one or two sentences, explain the error in the student's reasoning.
The error in the student's reasoning happened as they get confused between the beta minus decay and beta plus decay.
What is beta minus decay?A neutron is converted into a proton in beta minus, increasing the atomic number of the atom.
The proton is positive, while the neutron is neutral. The nucleus also produces an electron and an antineutrino in order to ensure charge conservation.In the given question beta minus decay is not occur as atomic number of the daughter nuclei does not increases. Rather than this in the given decay atomic mass of the daughter nuclei is less than the parent nuclei means plus beta decay is happened there.
Hence the error is in predicting the correct particle with charge.
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What is the general form for the simplest type of acid-base reaction? A. Acid + base → H+ + OH-
B. Acid + base → base + acid
C. Acid + base → salt + water
D. Acid + base → solid + water
Answer:
C
Explanation:
Adding and acid and base together until it is completely neutralized will give us water and a salt.
For example:
HCl + NaOH --> NaCl + H2O
HCl being the acid
NaOH being the base
The H2O is water
The NaCl is the salt
Name the molecule in the picture
Answer:
1,3 - dimenthylbenzene
Right option is (c).
Explanation:
⠀
⠀
As here in the figure, we can see the hexagonal shape with a circle inside it which depicts the benzene ring. And at 1 and 3 carbon atom, the methyl group is attach to the it.
⠀
It's formula will be
[tex] \sf C_8H_{10}[/tex]
It is also known as m-xylene.
⠀
And this organic compound is used in leather and rubber industries.
PLEASE HURRY AND CHECK IMMAGE. Predict the shape of the molecule.
0
H
H
A. bent
B. linear
C. trigonal planar
D. tetrahedral
Answer:
A. bent
Explanation:
Which type of fossil can be described as dead wood that has turned into stone?
a. cast fossil
b. sedimentary fossil
c. petrified
d. mold fossil
Answer:
The answer is c hope it is right if it is rong please tell me tho :)
What do you mean by cation and anion
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Cations are ions that has a positive charge on it, and since it's a positive charge, it means that the ion has more protons than the number of electrons.
On the same contray, Anions are negatively charged particles having more electrons than protons in it, and hence bearing a negative charge.
property : non - alike ions attract each other by electrostatic force.
Answer:
Cations are positively-charged ions.
Anions are negatively-charged ions.
Type the correct answer in the box. given: cac2 n2 → cacn2 c in this chemical reaction, how many grams of n2 must be consumed to produce 265 grams of cacn2? express your answer to three significant figures. the reaction requires grams of n2.
The amount, in grams, of [tex]N_2[/tex] that will be consumed to produce 265 grams of [tex]CaCN_2[/tex] will be 80.61 grams
Stoichiometric calculationFrom the equation of the reaction:
[tex]CaC_2 + N_2 --- > CaCN_2 + C[/tex]
The mole ratio of [tex]N_2[/tex] consumed to [tex]CaCN_2[/tex] produced is 1:1.
Mole of 265 grams of [tex]CaCN_2[/tex] = 265/92.11 = 2.88 moles
Equivalent moles of [tex]N_2[/tex] = 2.88 moles
Mass of 2.88 moles [tex]N_2[/tex] = 2.88 x 28.02 = 80.61 grams
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What makes this lever effective?
A: The man had more mass than the rock
B: The man is closer to the fulcrum than the rock is
C: The man is farther from the fulcrum than the rock is
D: The rock has more mass than the man
please help
Tare the balance. Place the wooden block on
the pan, and record the block's mass below. g
Answer:
the first question's answer is 10.7g and the follow up question is 47.7g.
Explanation:
it makes you drag the object onto the scale and then displays it on the green rectangle.
What is the maximum mass of ammonia that can be formed when 36.52 grams of nitrogen gas reacts with 10.62 grams of hydrogen gas according to the following equation? Please round your answer to the nearest 0.01 gram.
N2 + 3 H2 = 2 NH3
The maximum mass of NH₃ that can be formed when 36.52 g of N₂ reacts with 10.62 g of H₂ is 44.35 g
Balanced equationN₂ + 3H₂ —> 2NH₃
Molar mass of N₂ = 14 × 2 = 28 g/mol
Mass of N₂ from the balanced equation = 1 × 28 = 28 g
Molar mass of H₂ = 2 × 1 = 2 g/mol
Mass of H₂ from the balanced equation = 3 × 2 = 6 g
Molar mass of NH₃ = 14 + (3×1) = 17 g/mol
Mass of NH₃ from the balanced equation = 2 × 17 = 34 g
SUMMARY
From the balanced equation above,
28 g of N₂ reacted with 6 g of H₂ to produce 34 g of NH₃
How to determine the limiting reactantFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
36.52 g of N₂ will react with = (36.52 × 6) / 28 = 7.83 g of H₂
From the above calculation, we can see that only 7.83 g out of 10.62 g of H₂ are required to react completely with 36.52 g of N₂.
Therefore, N₂ is the limiting reactant
How to determine the maximum mass of NH₃ producedFrom the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃
Therefore,
36.52 g of N₂ will react to produce = (36.52 × 34) / 28 = 44.35 g of NH₃
Thus, the maximum mass of NH₃ obtained from the reaction is 44.35 g
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How is the delta H fusion used to calculate the energy released when a volume of liquid freezes
The ΔH fusion used to calculate the energy released when a mass of liquid freezes by using the formula Grams liquid x mol/g x ΔH fusion.
What is enthalpy?The enthalpy of fusion of a substance, also known as (latent) heat of fusion, is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.
Heat of formation or enthalpy is given for any one mole of substance.
And it will be calculated for moles of gases as, so for this first mass will be converted into moles as-
n = W/M, where
W = given mass in grams
M = molar mass in g/mol
and then multiply the given moles by the enthalpy of formation of one mole.
Hence, Grams liquid x mol/g x ΔH fusion is used.
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Answer:
ANSWER
Explanation:
What reactant concentrations, pressure and temperature conditions would favor the production of the substance that is underlined in each of the following equations. Make sure you address all three of the factors listed above for each equilibrium.
a) 2CO(g) + O2(g) <--> 2CO2 (g) + 167 kJ
b) Cu2+(aq) + 4NH3(aq) <--> Cu(NH3)42+(aq) + 42 kJ
c) 2HI(g) + 12.6 kJ <--> H2(g) + I2(g)
d) 4HCl(g) + O2(g) <--> 2H2O(g) + 2Cl2(g) + 113 kJ
e) PCl5(g) + 88 kJ <--> PCl3(g) + Cl2(g)
Answer:
a) Increase the pressure, Increase the reactants, Decrease the temperature
b) No effect on pressure, Increase the reactants, Decrease the temperature
c) No effect on pressure, Increase the reactants, Increase the temperature
d) No effect on pressure, Increase the reactants, Decrease the temperature
e) Decrease the pressure, Increase the reactants, Increase the temperature
I had to look up the questions online because you did not underline them properly, but yeah these should be the respective conditions for each equation
Increasing pressure shifts equilibrium to the side with the least amount of gas moles, decreasing pressure does the opposite
Increasing Reactants will cause more products to be made
Increasing temperature in an endothermic reaction will shift equilibrium to the right, and in the opposite direction if the reaction is exothermic (left)
Decreasing temperature in an endothermic reaction will shift equilibrium to the left, and in the opposite direction if the reaction is exothermic (right)
According to the kinetic-molecular theory, the collision between two ideal gas particles is a result of
Answer:
Neither Attraction Nor Repulsion
Explanation:
To start off,
Kinetic Molecular Theory:
A theory that describes the behavior, interaction, and movement of gas molecules; based on the idea that particles of matter are always in motion; the relationship between the microscopic qualities and the macroscopic qualities of a gas.Repulsion:
Repulsion in chemistry stands for the force which exists between two bodies that have the same electric charge or the same magnetic polarity, this force tends to repel the bodies and separate them from each other.Attraction:
The attraction of the negatively charged electrons that are circling the nucleus and the positively charged protons that are inside the nucleus provokes a pill that creates a chemical bond.To finish,
Gas particles move at random, which means there are no attractive forces between them or in their surroundings. The entire kinetic energy of two particles is preserved when they collide.
Answer:
Neither attraction nor repulsion.
Explanation:
Just took the test!
What are some applications of fission reactions? as a zero-waste energy source for generating large amounts of heat for creating stable elements from unstable ones for creating new, heavier elements as the energy source in nuclear weapons
Some of the applications of fission reactions are as follows:
for generating large amounts of heatfor creating stable elements from unstable onesas the energy source in nuclear weaponsWhat are nuclear fissions?Nuclear fission is a nuclear reaction in which a large nucleus splits into smaller ones with the simultaneous release of energy.
Nuclear fission involves the release of radioactive particles which causes a decrease in the number of atoms.
Nuclear fission have the following applications in industry:
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When the fish water had pH of 8.0, the hydronium ion concentration is 1.0x 10^-8 mole per liter. What is Hydornium ion con ent ration when water had pH of 7.0
The hydronium ion concentration when pH = 7 is : 8.75 * 10⁻⁹ mole/liter
Determine hydronium ion concentration when pH = 7
Given that :
pH = 8.0
Hydronium ion concentration = 1 * 10⁻⁸ mole/liter
Resolving the question
8.0 = 1 * 10⁻⁸ mole/liter
7.0 = x
therefore :
x = 7 ( 1 * 10⁻⁸ ) / 8.0
= 8.75 * 10⁻⁹ mole/liter
Hence we can conclude that The hydronium ion concentration when pH = 7 is : 8.75 * 10⁻⁹ mole/liter
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3. Which half-reaction equation represents reduction?
Answer:
Which half-reaction equation represents reduction?
answer is 2
Answer:
B CU2+ +2e- -> Cu
Explanation:
reduction means something opposite of the word
reduction means an electron is GAINED in the part before the arrow
it's the " + 2e- " part of the equation before the arrow or "->" part
oxidation is the LOSING of an electron so it would show up to the right of arrow or "->" of the equation as "+2e-"
both reduction & oxidation reactions are called "redox"
in a battery
anode is oxidation
cathode is reduction
anode is positive
cathode is negative electrode
decomposing compounds is electrolysis.
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What kinds of solute particles are present in water solutions of electrolytes and no electrolytes?
Ion particles are present in water solutions of electrolytes while neutral molecules are present in case of non electrolytes.
What are electrolytes?Electrolytes are compounds that dissociate into ions when dissolved in a solution, resulting in the solution becoming conductive to electricity. These substances are usually made up of ionic compounds or acids that dissolve in water, producing positively and negatively charged ions. These ions can move freely within the solution and transport electric charge, thereby transforming the solution into a conductor of electricity.
What type of solute particles exist in water solutions of electrolytes?When we talk about water solutions of electrolytes, it's important to note that the solute particles are present in the form of ions. These ions are essentially atoms or molecules that have a net electric charge as a result of gaining or losing electrons. The presence of these charged particles allows for conductivity within the solution, making them capable of carrying an electric charge. Some common examples of electrolytes include table salt (also known as sodium chloride), acids, and bases.
What type of solute particles exists in water solutions of non electrolytes?When it comes to solutions in water that contain non-electrolytes, the solute particles are made up of neutral molecules or compounds that lack an overall electric charge and therefore, cannot facilitate electrical conductivity within the solution. Sugar, alcohol, and urea are a few examples of non-electrolytes.
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A student dissolves powdered tea in water. How can the student separate the parts of the mixture?
Answer:
The student can evaporate the liquid water.
Explanation:
The student only mixed water with the powdered tea. Therefore, if the water is evaporated from the mixture, the student will be left with the tea mixture only.
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A 72.0-gram piece of metal at 96.0 °C is placed in 130.0 g of water in a calorimeter at 25.5 °C. The final temperature in the calorimeter is 31.0 °C. Determine the specific heat of the metal. Show your work by listing various steps, and explain how the law of conservation of energy applies to this situation.
Answer:
Approximately [tex]0.639\; {\rm J \cdot g^{-1} \cdot K^{-1}}[/tex].
Explanation:
Look up the specific heat of water:
[tex]c(\text{water}) = 4.18\; {\rm J \cdot g^{-1} \cdot K^{-1}}[/tex].
It is given that the mass of the water in this calorimeter is:
[tex]m(\text{water}) = 130.0\; {\rm g}[/tex],
The temperature of the water in this calorimeter has increased by:
[tex]\Delta T(\text{water}) = (31.0 - 25.5)\; {\rm K} = 5.5\; {\rm K}[/tex].
Thus, the energy that the water in this calorimeter absorbed would be:
[tex]\begin{aligned}& Q(\text{water})\\ =\; & c(\text{water}) \, m(\text{water}) \, \Delta T(\text{water}) \end{aligned}[/tex].
Let [tex]c(\text{metal})[/tex] denote the specific heat capacity of this piece of metal.
The mass of this piece of metal is:
[tex]m(\text{metal})[/tex].
The temperature of this piece of metal has been reduced by:
[tex]\Delta T(\text{metal}) = (96.0 - 25.5)\; {\rm K} = 70.5\; {\rm K}[/tex].
As this piece of metal cooled down, the energy it released would be:
[tex]\begin{aligned}& Q(\text{metal})\\ =\; & c(\text{metal}) \, m(\text{metal}) \, \Delta T(\text{metal})\end{aligned}[/tex].
Assuming that there is no exchange of energy between contents of this calorimeter and surroundings. By the law of conservation of energy, energy could neither be created nor destroyed.
Since energy could not be destroyed, the water in this calorimeter need to absorb the entirety of the energy that this piece of metal released. At the same, since no energy isn't created, the energy that the water absorbed would need to entirely come from this piece of metal. Therefore:
[tex]Q(\text{metal}) = Q(\text{water})[/tex].
[tex]\begin{aligned}& c(\text{water})\, m(\text{water})\, \Delta T(\text{water}) \\&= c(\text{metal})\, m(\text{metal})\, \Delta T(\text{metal}) \end{aligned}[/tex].
Rearrange and solve this equation for [tex]c(\text{metal})[/tex]:
[tex]\begin{aligned}& c(\text{metal}) \\=\; & \frac{c(\text{water}) \, m(\text{water})\, \Delta T(\text{water})}{m(\text{metal})\, \Delta T(\text{metal})} \\ =\; & \frac{4.18\; {\rm J \cdot g^{-1} \cdot K^{-1}} \times 130.0\; {\rm g} \times (31.0 - 25.5)\; {\rm K}}{72.0\; {\rm g} \times (96.0 - 25.5)\; {\rm K}} \\ \approx\; & 0.639\; {\rm J \cdot g^{-1}\cdot K^{-1}}\end{aligned}[/tex].
How many molecules are in a 45g sample of water?
Answer:
Solution : Number of moles of water `=(" Mass of water ")/(" Gram molecular mass of water ")= (45g)/(18g)= 2.5`. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.Explanation:
Hope It helps uWhat is/are defined in elements of the same group?
A. Atomic stability
B. Electron configuration
C. Chemical/physical properties
D. Exponentially increasing atomic weight
Answer:
C
Explanation:
Elements in the same groups have similar chemical/physical properties. The reason the answer isn't electron configuration is that if this was the case, there would be no reason for transition metals to exist as they can have a varying amount of electrons in their outer shell.
For example, all alkali metals (Group 1) turn into positive ions when reacting and Halogens (Group 7) all turn into negative ions after reacting.
