the only time electrons are equal to protons is when the charge is neutral. if the charge is positive then there's more protons.
if the charge is negative then there's more electrons.
5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.38 J/g °C)
114°
Explanation:
ΔE = mcΔT
ΔE = 5(0.38)(80 - 20)
ΔE = 1.9(60)
ΔE = 114°
Calculate the number of atoms in 2.1g of nitrogen
Answer:
2.1×6.02×1023÷ 14
9.03×1022 atom of nitrogen
Explanation:
What does a pH of 13.8 mean
Question 8 options:
The solution is acidic
Impossible to tell from the information provided.
The solution is a strong base
The solution is basic
A solution with a pH of 13.8 means that the solution is a strong base.
What is pH?pH refers to power of hydrogen. The pH is a scale used to measure the degree of acidity or alkalinity of a solution.
pH scale ranges from 0 - 14
Where;
0 -6.9 indicates acidic7.1 - 14 indicates basicHowever, the closer the pH value is to 1, the more the acidity and vice versa while the closer it is to 14, the more the alkalinity and vice versa.
Therefore, a solution with a pH of 13.8 means that the solution is a strong base.
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Under which set of conditions do real gases deviate the most from the ideal gas law?
Answer:
In summary, a real gas deviates most from an ideal gas at low temperatures and high pressures. Gases are most ideal at high temperature and low pressure. What factors attributes to the deviation of gas law from the ideal gas theory?
Explanation:
Real gases deviate the most from the ideal gas law under low temperature and high pressure.
What is the ideal gas law?
Ideal gas laws say about hypothetical gases, the collision between the molecules of an ideal gas would be perfectly elastic.
There are three variables of an ideal gas, absolute temperature, pressure, and volume.
PV = nRT
Thus, real gases deviate the most from the ideal gas law under low temperature and high pressure.
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What is the difference between a reflected and a diffracted sound wave?
Answer:
Diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path.
Reflection involves a change in direction of waves when they bounce off a barrier; refraction of waves involves a change in the direction of waves as they pass from one medium to another
Explanation:
If we use water waves as an example, waves hitting shallower water at an angle will slow down and change direction slightly. That is refraction
Waves hitting an island will bend and eventually close in on the "shadow" of the island. That is diffraction
How long do peeled boiled eggs last in the refrigerator?.
Answer:
approximately 1 week
Explanation:
Hope this helps, feel free to give feedback
1 to 2 weeks but if they smell a litte more stink then usually you better get rid of them or they my make you sick. i got sick for old boiled egg from the school cafeteria a long time ago.
Explanation:
pls explain
help would be appreciated
Answer:
b
Explanation:
many solids are crystalline hence a is eliminated
graphite contains free electrons while diamond uses all electrons in bonding and many substances have that property hence c is eliminated
only substances made up of carbon produce carbondioxide as the product when burnt
How can I identify which substance is more thermal stable?
Given the gas conversion factor 1 MOL= 22. 4 L , why couldn’t we just convert 38. 0 L to moles to get the answer for the last problem?
To calculate the molar volume of a gas at STP you can use the ideal gas law equation,
PV=nRT
Regardless of what ideal gas you use, the molar volume at STP will be identical across the board, since you'll be using 1 mole in the ideal gas law equation regardless of what gas you're dealing with.
That is why the volume occupied by 1 mole of any ideal gas will be equal to 22.7 L at STP.
22.4L = 1 mol
38.0L = ?
= 38/22.4
=1.6964285714 Moles
A rigid, non-flexible container of O2 gas is being transported to a hospital. What will most likely happen if the vehicle is left unattended and the temperature of the O2 rises?
A. The pressure will increase and the container will leak or explode. B. The pressure will decrease and the container will leak or explode. C. The pressure will increase, but the particles will condense within the container. D. The pressure will decrease and the container will maintain its current temperature.
If the temperature of the O2 in the container rises as a result of being abandoned for quite some time, the pressure in the container will increase and this may either lead to an explosion or leakage of the gas.
What is the relationship between temperature and pressure of a gas?At constant volume, the pressure of a gas increases with increased temperature as a result of an increase in the average kinetic energy of the gas molecules which increases the collision rate among the molecules.
Thus, if the temperature of a gas in a container increases, the pressure inside the container will also increase. This may lead to the gas leaking from the container or the container may even outrightly explode due to pressure.
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How can solar flares affect the oceans?
Explanation:
it can damage satellites cuase there in space and are not protected by earth
Clouds form when water vapor ____________ out of the air.
Answer:
condenses
Explanation:
change or cause to change from a gas or vapor to a liquid.
Which of these form electrolytic solutions with water?
Multiple answers.
A) Sodium Chloride (NaCl)
B) Glucose (C6H12O6)
C) Hydrochloric acid (HCl)
D) Carbon Dioxide (CO2)
Answer:
I believe is the correct answer
Explanation:
a
2. Which statement is TRUE about ionic compounds?
A. In an ionic compound, the positive ion is the cation, the negative ion is the anion, and the cation
is always named first.
B. In an ionic compound, the positive ion is the cation, the negative ion is the anion, and the anion
is always named first.
C. In an ionic compound, the positive ion is the anion, the negative ion is the cation, and the anion
is always named first.
D. In an ionic compound, the positive ion is the anion, the negative ion is the cation, and the cation
is always named first.
Answer:
I think it's c I hope this helps
nitrogen gas reacts with oxygen gas to produce nitrogen dioxide gas
Answer:
answer is nitrogen dioxide
For the molecule allene, h2 c = c = ch2, give the hybridization of each carbon atom. Will the hydrogen atoms be in the same plane or perpendicular planes?
Owing to the fact that allene is not a planar molecule, the hydrogen atoms in the molecule do not lie on the same plane.
What is a plannar molecule?A planar molecule refers to those molecules that lie on same plane. This means that the atoms in the molecules are all arranged along the same plane.
Now we know that the molecule allene is not a planar molecule. Owing to the fact that allene is not a planar molecule, the hydrogen atoms in the molecule do not lie on the same plane. All the carbon atoms present are sp2 hybridized.
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Explain how matter is conserved on a molecular scale when ionic compounds dissociate in solution ?
The matter is conserved on a molecular scale when ionic compounds dissociate in solution in the form of solvated ions.
What are ionic compounds?Ionic compounds are those compounds which are formed due to high attractive electrostatic force between the cation (positively charged ion) and anion (negatively charged ion) of any substance.
When a solid ionic compound dissolve in any solution then they will shows dissociation reaction as a result of which we get their ions uniformly distributed in the solution. As water molecule is also polar and ionic compounds are also polar that's why they show complete dissolving in water due to dissociation.
Hence in molecular scale we get it in the form of solvated ions.
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At 25°C, which 5.0 g Zn sample will react the fastest with dilute HCÚ?
A)
bar
B)
lump
C)
powdered
D)
sheet metal
powdered because it has more surface area which leads means there are more reactant particles exposed to collide, therefore the successful collision rate increases, resulting in an increased rate of reaction.
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Explain in words what is happening in each chemical equation.
nh3 + o2 -> no2- + 3h+ + 2e-
no2- + h2o -> no3- + 2h+ +2e-
Answer:
Ammonia and oxygen without catalyst | NH3 + O2 → N2 + H2O. With supply of heat, ammonia reacts with oxygen and produce nitrogen gas and water as products. Nitrogen of ammonia is oxidized to nitrogen gas from -3 oxidation state to 0 oxidation state.
Explanation:
When calcium carbonate reacts with hydrochloric acid, calcium ions are transferred to the solution. Write only one net ionic equation for this reaction:
Answer:
In conclusion, the net ionic equation for the reaction between calcium carbonate and hydrochloric acid is CaCO3 solid plus two H+ aqueous react to form Ca2+ aqueous plus CO2 gas plus H2O liquid.
When calcium carbonate reacts with hydrochloric acid, calcium ions are transferred to the solution, the the net ionic equation is CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺.
What is net ionic equation?
Net ionic equation of any reaction is the equation where all entities are written in the form of ions except spectator ions.
Given chemical reaction is:
CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)
Ionic reaction for the above reaction will be written as:
CaCO₃(s) + 2H⁺ + 2Cl⁻ → Ca²⁺ + 2Cl⁻ + CO₂ + H⁺ + OH⁻
In the baove reaction Cl⁻ is the spectator ion as they are present on both sides of the given chemical reaction. So the net ionic reaction will be written as:
CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺
Hence the net ionic reaction is CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺.
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Which statement best describes a society’s desire for fuel-efficient vehicles? Choose the correct answer.
Auto manufacturers set fuel-efficiency standards.
Interest in fuel efficiency decreases when fuel prices are low.
Fuel shortages in the 1980s started the interest in fuel efficiency.
An increase in fuel efficiency increases carbon dioxide emissions.
Fuel shortages in the 1980s started the interest in fuel efficiency best describes a society’s desire for fuel-efficient vehicles because of Iran- Iraq war.
Why Fuel shortages in the 1980s started?The Iran-Iraq War in 1980 is the main cause of shortage of oil production. Iraq's and Iran's oil production dropped significantly which triggering economic recessions worldwide.
So that's why society’s desire for fuel-efficient vehicles in order to reduce consumption as well as reduce pollution.
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The acid dissociation constant of alloxanic acid is. Calculate the ph of a solution of alloxanic acid. Round your answer to decimal place
Answer:
The pH of a 4.4 M solution of boric acid is 4.3
Explanation:
at t=0 cM 0 0
at eqm
So dissociation constant will be:
Give c= 4.4 M and = ?
Putting in the values we get:
Also
Thus pH of a 4.4 M solution is 4.3
What is the difference between an endothermic and an exothermic reaction?
A tank of oxygen holds 20.0 L at a pressure of 15.0 atm. What is the pressure of this same gas a constant temperature if the oxygen is allowed to expand to 300.0 L?
Answer:
khate ko ban randi ko ban
What is the second quantum number of a 3p3 electron in phosphorus 1s22s22p63s23p3
The second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.
What are quantum numbers?Quantum numbers are a set of numbers that describe the position and energy of an electron in an atom.
Principal, azimuthal, magnetic, and spin quantum numbers are the four types of quantum numbers.
Thus, the second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.
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Is food a fuel? Explain your answer. a ?
Answer:
no, food is not a fuel because it just give energy to do many activities but it will not provide any fuel only the dead and decaying material which berries under the soil then after a long years it becomes fossil fuel
Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount
The number of moles of iron produced can be obtained by the use of stoichiometry.
What is stoichiometry?The term stoichiometry has to do with mass - mole or mass - volume relationships. Stoichiometric relationships could be used to determine the amount of substance.
Now the reaction equation as well as other details are not shown in this question hence a numerical anwer can not be provided. As such, we can know that the balanced reaction equation can always be used to obtain the amount of iron by stoichiometry.
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Look at the products of the chemical reaction to determine if the reactant added to water caused an acid reaction, a base reaction, or a neutralization reaction.
Acid
Neutralization
Base
1.
2HF + 2CaOH -> 2H2O + 2NaF
2.
3HI + 2H2O -> 2H3O+ + 3I- + H+
3.
2CH3COO- + H2O -> CH3COO- + OH- + CH3COOH
0.05 moles of HCL are added to 2 L of H2O. What is the molarity of the solution?
Impossible to answer the question with the information provided.
1.60
0.025M
10.4
1. The reaction is a neutralization reaction
2. The reactant added to the water causes an acid reaction
3. The reactant added to the water causes a base reaction
4. The molarity of the solution is 0.025 M
What is a neutralization reaction?This is a reaction involving an acid and a base which result in the formation of salt and water only
HF + NaOH –> H₂O + NaF
The reaction above indicates neutralization since the reaction produces water (H₂O) and salt (NaF) only
What is an acid?An acid is a substance which dissolves in water to produce hydronium ion H₃O⁺
3HI + 2H₂O —> 2H₃O⁺ + 3I¯ + H⁺
The reaction above is an acid reaction since it produces H₃O⁺
What is a base?A base is a substance which dissolves in water to produce hydroxide ion OH¯
2CH₃COO¯ + H₂O —> CH₃COO¯ + OH¯ + CH₃COOH
The reaction above is a base reaction since OH¯ is produced.
How to determine the molarity Mole = 0.05 mole Volume = 2 LMolarity =?Molarity = mole / Volume
Molarity = 0.05 / 2
Molarity = 0.025 M
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Oxidation reactions involve the loss of __________.
Answer:
Electrons
Explanation:
How should you prepare a buret for titration before loading it with titrant?.
The buret should be conditioned before loading it with the titrant.
What is a Buret?This is defined as laboratory apparatus which is used in quantitative chemical analysis to measure the volume of a liquid or a gas.
It should be conditioned with the titrant solution to prevent dilution from occurring as a result of cleaning it with water.
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