Aqueous potassium chloride will react with which one of the following to form a precipitation reaction?
copper (II) nitrate
sodium chromate
ammonium phosphate
lead (II) chlorate
Answer:
lead (II) chlorate
Explanation:
precipitate means not soluble in water
potassium chlorate is not very soluble in water, it precipitates and may be collected by filtration
lead(II) chloride can be made as a white precipitate by adding a solution containing chloride ions to lead(II) nitrate solution
thoughtcocom chemguidecouk
Under which conditions the temperature and pressure is a gas most soluble and water
We know
[tex]\\ \rm\Rrightarrow S\propto T[/tex]
Higher the temperature higher the solubilityAccording to gay lussac's law
[tex]\\ \rm\Rrightarrow P\propto T[/tex]
If temperature is high pressure is also highSo our answer is high pressure and high temperature
Atoms with certain characteristics are radioactive. Which of those below will
always be radioactive?
A. all atoms with more neutrons than protons
B. all atoms with an atomic number under 83
C. all atoms with fewer neutrons than protons
D. all atoms with an atomic number over 83
Carbon sequestration technology, which limits the emission of the greenhouse gas carbon dioxide (CO2) into the atmosphere, is currently used by _______% of all coal-fired power plants in the USA.
25% of all coal fired power plants in the United States of America uses the Carbon Sequestration technology.
Carbon Sequestration TechnologyCarbon sequestration can be defined as the process of capturing and storing atmospheric carbon dioxide. It is one method of reducing the amount of carbon dioxide in the atmosphere with the goal of reducing global climate change.
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Consider the intermolecular forces present in a pure sample of each of the following compounds: CH3CH2CH2NH2 and CH3CH2C02H. Identify the intermolecular forces that these compounds have in common. A) Dipole-dipole forces and hydrogen bonding. B) Dipole-dipole forces only. C) Dispersion forces, dipole-dipole forces, and hydrogen bonding. D) Dispersion forces and dipole-dipole forces
The common intermolecular forces present in the compounds CH3CH2CH2NH2 and CH3CH2C02H are Dispersion forces, dipole-dipole forces, and hydrogen bonding.
What are intermolecular forces?Intermolecular forces are forces of attraction between molecules of the same compound.
Intermolecular forces are important in the physical properties of molecules.
Some intermolecular forces are:
Dipole-dipole forceshydrogen bondingDispersion forcesThe given compounds are contain hydrogen bonding and London dispersion forces as well as dipole-dipole forces.
Therefore, the common intermolecular forces present in the compounds CH3CH2CH2NH2 and CH3CH2C02H are Dispersion forces, dipole-dipole forces, and hydrogen bonding.
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what is the molar mass of sodium chloride
Answer:
58.44 g/mol
hope it helps :)
mark brainliest!
what is an oxidation reaction
Answer:
Oxidation: loss of electrons, gain of oxygen
How to determine anode and cathode in galvanic cell.
Answer:
electrons flow from left to right
Explanation:
the electrons flow from anode to cathodeoxidation half cell reaction occurs in the anodereduction half cell reaction occurs in the cathodeWhich of the following liquids would turn
blue litmus paper red?
1. orange juice
2. milk of magnesia
3.
distilled water mixed with a little baking soda
4. oven cleaner
Answer:
orange juice because it a type of acid.
Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reactants. consider 1 mole of tritium plus 1 mole of deuterium to be a mole of "reactions" (total molar mass = 5 grams).
The energy released in nuclear reactions are far larger than that released in chemical reactions due to the release of nuclear energy from the nucleus.
Why is the energy released in a reaction?Energy is released in a reaction due to the breaking of bonds are well as formation of bonds.
The quantity of energy released in reactions differs according to the reaction type involved.
When compared to chemical reactions, the energy released in nuclear reactions are very much higher because of the changes that occurs in the nucleus of the atoms involving nuclear energy.
The energy, E released in nuclear reactions is given by the formula below:
[tex]E = mc^{2}[/tex]
where m is the mass of the substance and c is the speed of light.
Therefore, the energy released in nuclear reactions are far larger than that released in chemical reactions.
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Answer:
3.39 x 1014 J/Kg
Explanation:
Describe the trends in atomic radii by checking the correct box. atomic radii from the left to right across a period tend to: increase. decrease. atomic radii from the top to the bottom of a group tend to: increase. decrease.
Answer:
1st is decrease
2nd increase
Explanation:
I just did it
Answer:
1. Decrease 2. Increase
Explanation:
Edge 2023
The two highest levels of the atmosphere contain only small amounts of oxygen, nitrogen, and ozone. These layers are the
Answer:
mesosphere and thermosphere
Explanation:
How can professionals increase their levels of stress as a result of personal work habits?
Working at a steady rate
Developing work ethics
Procrastinating
Setting personal goals
Answer:
A
Explanation:
Developing work ethics won't lower your stress although it may make your conscience a little happier. Not B
Not C. Procrastinating just makes things harder. The mountain of things to do is not diminishing at all and your stress knows it.
Not D. Although D is the second best answer, setting goals is not really an action. It is a plan for how to work. But it is not work. Still having a goal is useful.
The answer is A. Just keep hitting what you have to do at a steady pace.
2(NH4)₂Cr₂ What are the names of the atoms make up the above formula?
Answer:
Nitrogen, Hydrogen, Chromium
Explanation:
N= Nitrogen
H= Hydrogen (it is not helium because helium is "He")
Cr= Chromium
A particular .55 m solution contains 1.7 g of salt what mass would be present in the same volume of a 3.20 m solution
Answer: 9.9 g
Explanation:
We can set up a proportion:
1.7/.55 = x/3.20
x = 9.9 g (to 2 s.f.)
When the limiting reactant in a chemical reaction is completely used, the.
Answer:
The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. Given the balanced chemical equation that describes the reaction, there are several ways to identify the limiting reagent.Explanation:
P32 is a radioactive isotope with a half-life of 14.3 days. If you currently have 17.5 g of P32 , how much P32 was present 9.00 days ago
Answer:
27.07 gm nine days ago
Explanation:
17.5 = x (1/2)^9/14.3
x = 27.07 gm
Can someone please help me?
D. Petroleum
Answer:
Water and plastic
Explanation:
The other two dont make as much sense
Equation Unbalanced : __AlCl3 + __F2 --> __AlF3 + __Cl2
When 4.00g of flourine reacts with excess aluminum chloride, how many grams of chlorine gas are produced? First balance the equation.
[tex]\\ \rm\Rrightarrow 2AlCl_3+3F_2\longrightarrow 2AlF_3+3Cl_2[/tex]
Balanced3mols of fluorine produce 2 mol chlorine
1 mol fluorine produces 2/3=0.6mol chlorine
Moles of fluorine gas=
4/190.2mol.approxMoles of chlorine:-
0.2(0.6)=0.18molMass of chlorine
71(0.18)12.78gWhich of the following will lose 2 electrons to become stable?
Answer:
Magnesium,Berillium,
Explanation:
they they belong to group II
What is the name of this hydrocarbon? a chain of 3 carbon atoms, with h bonded to each end of the chain and below each c. h is also bonded above the first and third c; the center is bonded to another c, which in turn is bonded to 3 h. 1-methylbutane 2-methylbutane 2-methylpropane 3-methylpropane
The correct IUPAC name for this compound as described here is 2-methylpropane.
What is IUPAC nomeclature?The term IUPAC nomeclature refers to the generally accepted pattern for the naming of compounds. The international Union of Pure and applied chemistry (IUPAC) provides the guidelines for naming compounds. This system of nomenclature helps us to be able to write the unique name of a compound from its structure.
In the system of IUPAC, the parent name is the longest chain in the compound. The substituents are then given numbers in alphabetical order.
Now, the correct IUPAC name for this compound as described here is 2-methylpropane.
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Answer:
2-methylpropane
Explanation:
right on edge2022
What is the reason behind that the melting and boiling point of iron is more than that of sodium? Write any two differences between metalloids and alloys.
Answer:
difference between metal and alloy is that the metal is a pure substance whereas the alloy is a mixture of two or more components.
Explanation:
Mostly the metalloids have the appearance just like the metallic appearance And also they are the brittle one's . Boron and silicon are the example. Note; By combining with other metals metalloid can form the alloy
what is gold in the periodic table?
Symbol: Au
Atomic Number 79
Electron number: 79
State at room temperature: solid
what two types of ions do oysters need to form shells
100 points help is appreciated
Apply: For a strong base, the concentration of hydroxide ions [OH–] is roughly estimated to be the same as the concentration of the base. The pH of a strong base is found with the equation pH = 14 + log10[OH–]. Based on their concentrations, find the pH of each of the strong bases. Check your answers with the Gizmo.
Answer
[Ca(OH)2] = ?
pH Ca(OH)2 = ?
[NaOH] = ?
pH NaOH = ?
Litmus is an example of an indicator, a substance that changes color depending on its pH (pH is a measure of the concentration of protons, or H+ ions). In the Titration Gizmo™, you will use indicators to show how acids are neutralized by bases, and vice versa.
To begin, check that 1.00 M NaOH is selected for the Burette, Mystery HBr is selected for the Flask, and Bromthymol blue is selected for the Indicator.
Calculate: Concentration is measured by molarity (M), or moles per liter. Brackets are also used to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter of water, you would say [HNO3] = 0.6 M.
Because HNO3 is a strong acid, it dissociates almost completely in water. That means the concentration of H+ is very nearly equal to that of HNO3.What is [H+] if [HNO3] is 0.01 M? 0.01 M
The pH of a solution is equal to the negative log of H+ concentration: pH = –log[H+]
Describe: The equation for the reaction of nitric acid (HNO3) and sodium hydroxide (NaOH) is shown on the bottom right of the Gizmo.
Measure: A titration can be used to determine the concentration of an acid or base by measuring the amount of a solution with a known concentration, called the titrant, which reacts completely with a solution of unknown concentration, called the analyte. The point at which this occurs is called the equivalence point.
Explain: A titration curve is a graph of pH vs. volume of titrant. The graph at right shows a typical titration curve for the titration of a strong acid by a strong base. (A strong base is one that has relatively high dissociation in water.)
According to theBrønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons. When an acid and a base are combined, the acid is neutralized as the base accepts the protons produced by the acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above. There are two types of litmus papers: red and blue.How does litmus paper indicate an acid? Both strips turn red.
What is the active element in most photovoltaic cells?.
Answer:
if you mutliply 8x2 it would be 16 and half of 16 is 8 and if you multiply that by 2 you get 16 again and then if you multiply that by 2 it comes out to 32 then devide that by 2 and you get 16 then divide again and you get 8
Explanation:
Answer:
silicon is the most common semiconductor used in computer chips
What is the solvent for a solution made by dissolving sodium chloride into water?
O water
o sodium chloride
O chloride
O sodium
it is water because it is dissolving the sodium chloride
Which of the following describes a characteristic of water that helps it in dissolving a wide range of chemicals and biomolecules? (5 points)
It has a partial negative charge on oxygen and a partial positive charge on hydrogen.
It has a linear molecular structure with H-O-H arranged in a straight line.
It requires a high amount of heat to raise or drop its temperature.
It has completely non-polarized O-H bonds.
¤ As water has the ability to form hydrogen bonds which makes it an excellent solvent.
¤ For this ability of water it can dissolve many different kinds of molecules.
Hope it helpsA 45.3 g sample of potassium nitrate is dissolved in enough water to make
225 mL of solution. Determine the molar concentration of the potassium nitrate.
Answer:
1.99 M
Explanation:
It gives the mass of a compound, KNO3. First, find the gram formula mass of KNO3. You should get 101.102 g/mol, or something very close. Next, divide given mass by g/mol mass to get number of moles. In this case, 45.3/101.102 = .44806, roughly.
Now, since it says molar concentration, it is asking for moles per liter of solution. If it only gives you 225 mL, or .225 L, you have to adjust for that value. Divide the number of moles you have by number of liters.
.44806/.225 = 1.99 M. This isn't the exact answer, but always remember to round for significant figures. Since both numbers contain 3 significant figures, your answer should have 3. Therefore 1.99 is your answer.
What is the mass of 0.5 moles of carbon tetraflouride
Answer:
44 g
Explanation:
hope this helps