Answer:
NaCi + LiCl is the correct answer
The pairs of aqueous solutions produce a precipitate is NaCl + LiCl will produce a precipitate.
What is aqueous solution?Aqueous solution is defined as any solution in which water is used to dissolve or break down a substance.
There are basically three types of aqueous solution
Precipitation reactionAcid base reactionRedox reactionNon aqueous solution is defined as a solution formed by dissolving a solute in a solvent other than water.
There are basically four types of non aqueous solution
Aprotic solventProtogenic solventProtophilic solventAmphiprotic solventThus, the pairs of aqueous solutions produce a precipitate is NaCl + LiCl.
To learn more about aqueous solutions, refer to the link below:
https://brainly.com/question/26856926
#SPJ2
Iron is a transition element. transition elements that make them different from non-transition metals
such as magnesium.
Answer:
Transition metals differ from the non-transition metals such as magnesium in the following ways;
They have variable oxidation statesFormation of complex ions.Formation of colored ions.Transition metals both in the elemental and compound forms can serve as catalysts.Explanation:
Transition elements comprise of those elements in the d-block of the periodic table and which have incompletely-filled d-orbitals.
The transition elements are all metals and has the characteristic physical properties of metals such as;
high melting and boiling points,good conductors of heat and electricity,metallic lusterhigh densitiesmalleability and ductilityHowever, their chemical properties differ from those of the non-transition metals such as magnesium in the following ways;
They have variable oxidation states - the transition metals exhibit variability in their oxidation states because of the close similarity in the energies of the 4s and 3d electrons which are available for bond formation. For example, while magnesium has only one oxidation state of +2, vanadium a transition metal can have oxidation states of +2, +3, +4 and +5.Formation of complex ions - A complex ion consists of a central metal atom or ion to which several other atoms, ions or molecules are bonded. For example, blue tetramine copper (ii) ion, [Cu(NH₃)]²⁺.Formation of colored ions - unlike non-transition metal ions, the ions of transition metals are usually colored. For example, Copper (ii) ions, Cu⁺ are blue, Chromium (ii) ions, Cr³⁺, are green, etc.Transition metals both in the elemental and compound forms can serve as catalysts. For example, finely divide nickel serves as a catalyst in the hydrogenation of vegetable oil to margarine, while vanadium (v) oxide serves as a catalyst in the contact process for the manufacture of tetraoxosulfate (i) acid.Consider two reactants (A and B) that when mixed form a precipitate C, which can be filtered, dried, and then weighed. Carlos attempts to find the stoichiometric ratios in which A and B mix, by mixing different volumes of the same concentration of solutions of A and B (0.50 M). He records the following data:
Run Vol A (mL) Vol B (mL) Mass C (g)
1 10.0 10.0 1.17
2 20.0 10.0 2.33
3 30.0 10.0 3.50
4 40.0 10.0 3.50
Assuming that the products of the reaction are C and D, and that the stoichiometric coefficients for C and D are 1 and 2 respectively, the balanced chemical reaction will be
( ) A + ( ) B â 1 C + 2 D
Answer:
3A + B → C + 2D
Explanation:
Recall that:
[tex]\text{molarity} = \dfrac{no \ of \ moles}{volume \ of \ the \ solution}[/tex]
So;
[tex]\text{no \ of \ moles= molarity * volume \ of \ the \ solution}[/tex]
From the above table given in the question; we can have the following table:
Run moles of A moles of B Limiting reagent
1 0.5× 10⁻² 0.5× 10⁻² A and B are equal
2 1.0 0.5× 10⁻² 0.5× 10⁻² A
3. 1.5× 10⁻² 0.5× 10⁻² A
4 2.0× 10⁻² 0.5× 10⁻² B
Also, provided that the stoichiometric coefficients for C and D = 1 & 2 respectively.
Then, the stiochiometric ratio for A:B = [tex]\dfrac{1.5\times 10^{-2}}{0.5 \times 10^{-2}}[/tex]
[tex]= \dfrac{3}{1}[/tex]
Thus, the balanced equation is:
3A + B → C + 2D
How many total moles of ions are released when 0.0341 moles of Na2HPO4 dissolves completely in water
Answer:
0.1023 moles
Explanation:
We have this reaction
Na2HPO4 → 2Na+ + NPO4-
1 mole gives us 3 ions
Na+ has 2 ions to it
NPO4 has 1 ion
2 + 1 = 3
We multiply 3 with the number of moles to get the answer to this question
3 x 0.0341
= 0.1023 moles
So we conclude that total moles released when dissolved in water is equal to 0.1023
“Sound plays an important role in our lives”. Give two points in support of this statement.
Answer:
First job out of college was in an industrial manufacturing setting. Was told by plant engineer to walk around, get used to normal sounds. He stressed anything "abnormal" is a noise more so than a sound. Report abnormalilies to supervisor immediately!! So essentially sounds are giving us warnings something is abnormal.Sounds also provide feedback. Say you are performing an experiment, requires boiling water to sanitize. Start the burner under a vessel, go on about other preparations. Sound of water boiling will trigger setting a timer for how long to let it boil.Get off work, pleasant music, nature sounds can help us decompress from a stressful day on the job.Hope some of these give you impetus to think of other bullet points, sounds good to me. !!
Explanation:
Please hurry I'm in a test... 50 pts :)) HIGH SCHOOL CHEMISTRY
Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation?
Energy is absorbed because the product has more energy than the reactants have.
Energy is absorbed because the product has less energy than the reactants have.
Energy is lost because the product has more energy than the reactants have.
Energy is lost because the product has less energy than the reactants have.
Answer:
A. Energy is absorbed because the product has more energy than the reactants have.
Here the energy of both reactants is combined together and not released.
If the molecules in the above illustration react to form NH3 according to the equation N2 3 H2 2 NH3 , the limiting reagent is , the number of NH3 molecules formed is , and the number of molecules in excess is
Answer:
Follows are the solution to these question:
Explanation:
Given equation:
[tex]N_2+3H_2 \longrightarrow 2NH_3[/tex]
In this equation:
[tex]1 N_2[/tex] gives [tex]= 2NH_3[/tex]
so,
[tex]3N_2[/tex] gives= [tex]2 \times 3 = 6 NH_3[/tex]
similarly:
[tex]3H_2[/tex] gives [tex]= 2NH_3[/tex]
So, [tex]6H_2[/tex] gives = [tex]\frac{2}{3}\times 6=4NH_3[/tex]
Its limited reagent is =[tex]N_2[/tex]
The amount of [tex]NH_3[/tex] molecules were formed = 4.
and the amount of [tex]H_2[/tex] excess molecules are= 1
helpppp nowwww plsss!!
Answer:
A
Explanation:
if the earth slows down then that will give more time to the sun meaning days/nights will be longer
what is an invasive species and how can it affect an ecosystem
Answer:
Here
Explanation:
An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native. ... Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.
How many moles are there in 3.01 x 1024 atoms of argon?
Answer:
Try this for answer 3082.24
how many atoms are in 2.00 moles of Helium
Answer:
maybe try 4.002602, good luck
Describe how to calculate the Rf value for a spot on a TLC plate.
Answer:
In thin-layer chromatography, the retention factor (Rf) is used to compare and help identify compounds. The Rf value of a compound is equal to the distance traveled by the compound divided by the distance traveled by the solvent front (both measured from the origin).
Many factors would bring advantages when using fuel cells in cars but which factors present a drawback?
Answer:
B. hydrogen storage
Explanation:
Answer: B hydrogen storage
Explanation:
correct on edge 2020
Copper roofs on houses form patina (copper carbonates) over the course of years due to the reaction with oxygen, carbon dioxide and water in the air. Which of the following statements is incorrect for this process?
A) The reaction has a low activation energy.
B) The reaction has a low reaction rate.
C) The formation of patina would occur faster during the summer than the winter.
D) The formation of patina would occur slower at higher altitudes due to lower concentration of reactant. E) Adding a catalyst would increase the rate of patina formation.
Answer:
The answer is "Choice A".
Explanation:
In this question, the choice A is wrong because when the copper panels on houses produce a patina (copper oxide) through occur as a consequence of reactions from oxygen and water in the air, these reaction does not have low activation energy because lower activation energy that is stored in a faster response rate.
Consider the pair of solvolysis reactions. Draw the organic products, then predict the type of substitution mechanism and compare the expected rates.
Answer:
See explanation
Explanation:
Solvolysis is a chemical reaction in which the solvent, such as water or alcohol, is one of the reagents and is present in great excess of that required for the reaction. The solvents act as or produce electron-rich atoms or groups of atoms (nucleophiles) that displace an atom or group in the substrate molecule(Encyclopedia Britannica).
For the two reactions, the organic product is the same(the product is drawn in the second image attached). The both reactions occur by SN1 mechanism since the substrate is a tertiary alkyl halide. The nucleophile is CH3OH and the rate of reaction depends on the concentration of the alkyl halide and independent of the concentration of methanol present.
Therefore, changing the volume of the solvent has no effect on the rate of reaction. The two reactions proceed at exactly the same rate since the initial concentration of the alkyl halide is the same for both reactions.
can someone please help me!
Answer:
Explanation:
C defo
Thermal Energy Transfer Lab Edge
2021
help
please
Explanation:
same✊ raaaate meee please
What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius if the surface tension of ethanol is 0.032Jm2 and the density of ethanol is 0.71gcm3
Answer:
Explanation:
Expression for capillary rise is as follows
h = 2T / ρ g r where T is surface tension , ρ is density of liquid and r is radius of capillary tube.
T = .032 J m⁻²
ρ = .71 g / cm³
= 7100 kg / m³
r = .1 x 10⁻³ m = 10⁻⁴ m
h = 2 x .032 / (7100 x 9.8 x 10⁻⁴ )
h = .0092 m
= 9.2 mm .
1. Is the charge of nucleus positive, negative
or neutral?
What about the charge of an atom?
Answer:
nucleus contains protons and atom is neutral
Explanation:
as atom contains equal amount of protons and electrons
This is my question.............
Answer:
-3.15 °Celsius I think.
Answer:
-3 C
Explanation:
Find the mass, in grams, of 4.10x1023 molecules of F2.
Answer:
25.88 g of F₂.
Explanation:
From the question given above, the following data were obtained:
Number of molecules of F₂ = 4.10×10²³ molecules
Mass of F₂ =?
From Avogadro's hypothesis,
1 mole of F₂ = 6.02×10²³ molecules
Next, we shall determine the mass of 1 mole of F₂. This can be obtained as follow:
1 mole of F₂ = 2 × 19 = 38 g
Thus,
38 g of F₂ = 6.02×10²³ molecules
Finally, we shall determine the mass of 4.10×10²³ molecules of F₂. This can be obtained as follow:
6.02×10²³ molecules = 38 g of F₂
Therefore,
4.10×10²³ molecules = 4.10×10²³ × 38 / 6.02×10²³
4.10×10²³ molecules = 25.88 g
Thus, 25.88 g of F₂ contains 4.10×10²³ molecules.
Dinitrogen tetraoxide is a colorless gas that dissociates into nitrogen dioxide, a reddish brown gas.
a. True
b. False
Answer:
False
Explanation:
Disassociation of Dinitrogen tetraoxide is shown below -
N2O4(g) ⇌ 2NO2(g)
Nitrogen dioxide gas is deep red-orange in color. However, in presence of aerosols, this gas appears reddish-brown in color.
Hence the given statement is False
Which change will cause more CO2 to form in a closed container?
Answer:
Option C Removing Na₂CO₃
Option E Heating the container.
Explanation:
The equation for the reaction is given below:
2NaHCO₃ (s) <=> Na₂CO₃ (s) + CO₂ (g) + H₂O (g)
Enthalpy change (ΔH) = 136 KJ
To obtain more CO₂ do the following:
1. Add more NaHCO₃
From chemical equilibrium, adding more NaHCO₃ means the reactant has increase. Thus, it (the reactant) will react to form more product (CO₂)
2. Removing any of the products. Removing any of the products implies that more reactants are in the reaction vessel than the product. Thus, the reactants will react to produce more products (CO₂)
3. Heating the container. Heating the container will lead to an increase in the temperature of the reaction. Since the enthalpy change (ΔH) is positive it means the reaction is endothermic. Thus, heating the container i.e increasing the temperature will favours the forward reaction i.e more products will be obtained.
NOTE: Pressure has no effect in the reaction system since there is no gaseous reactants.
Considering the options given above, C and E gives the correct answer to the question.
1.The splitting of a heavy, unstable nucleus into two lighter nuclei is called _____.
a. Fission
b. Fusion
c. Radioactive Decay
d. Isotopes
Answer:
A) Fission
Explanation:
Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
how can natural selection can cause organisms to change over generations.
Answer:
Natural selection changes how well a species can survive in an environment.
Explanation:
I'm not the best at biology, but natural selection a term we use that's describes nature's way of choosing the strongest to survive. The species with the strongest adaptations will survive while the others will die off. For example, if a school of fish was forced to live in a colder habitat than usual, over many years some fish will adapt to that environment and be able to withstand it. But, some fish won't get those adaptations and be killed off. But, future generations will be born with that ability to withstand the cold environment and it would become normal. So, natural selection changes the way a species lives. Hope this helps
WILL GIVE BRAINLIEST!!!!
Any type or form of energy can change into any other type of energy. This is referred to as _____.
A. energy transformations
B. law of conservation of mass
C. law of conservation of energy
D. mechanical energy
Answer:
C
Explanation:
The Law of Conservation of energy is that energy can be transformed from one form to another, but can be neither created or destroyed.
the electron configuration of an element in its ground state is illustrated above. which, if any, of the three principles that determine the most stable electron configuration of an element does this configuration disobey
Answer:
hello your question is incomplete attached below is missing part
answer : Pauli's exclusion principle
Explanation:
The principle that was disobeyed is Pauli's exclusion principle this is because the Pauli's exclusion principle states that no two electrons can have the same set of quantum number.
In Box A the two electrons , have the same spin which means they have the same quantum number ( disobeys Pauli's exclusion principle )
What the mass in grams of 6.25 mol of copper(II) nitrate
Answer:
Mass of 6.25 moles of copper(II) nitrate = 1025 grams
Explanation:
Let us calculate the molar mass of Copper (II) nitrate
Molecular formula = Ca(NO₃)₂
Atomic mass of Ca = 40 g/mol
Atomic mass of N =14 g/mol
Atomic mass of O = 16 g/mol
molar mass of Ca(NO₃)₂ = 40 + (14 X2) +( 6X16) = 164 g/mol
moles=\frac{mass}{molarmass}moles=
molarmass
mass
therefore
mass = moles X molar mass
mass = 6.25 X 164 = 1025 grams
Which element would have similar properties to Sulfur? Chlorine O a ob Fluorine Oxygen Nitrogen
Answer:
sir/ma'am, i know i'm a NOOB at this kind of stuff but i believe it's oxygen.
Explanation:
i can't really remember the answer since it's been a week or so that i done this problem, it's between nitrogen and oxygen, though, i believe it's oxygen.
if ya don't believe me or trust me, then here's the link to help ya:
https://socratic.org/questions/what-elements-would-have-similar-properties-to-sulfur#628367
Use stoichiometry to determine how many moles of O2 are needed
to completely react with 2.25 moles of C3H8. Please show your work
Answer:
11.25 moles of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O
From the balanced equation above,
1 mole of C₃H₈ reacted with 5 moles of O₂.
Finally, we shall determine the number of mole of O₂ needed to react with 2.25 moles of C₃H₈. This can be obtained as follow:
From the balanced equation above,
1 mole of C₃H₈ reacted with 5 moles of O₂.
Therefore, 2.25 moles of C₃H₈ will react with = 2.25 × 5 = 11.25 moles of O₂.
Thus, 11.25 moles of O₂ is needed for the reaction.
Please help!!! Is the following example of synthesis? 2H2 + O2 —> 2H2O
Answer:
hahahaa i can get the points
Explanation:
yes it is again LOL thanks