Answers
Explanation:
Step 1: Write the balanced "molecular" equation:
[tex]2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)[/tex]
Step 2: H₂S is written in molecular form. Consult the solubility and net ionic equation rules on the information page to determine which of the other substances will dissociate:
[tex]2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)[/tex]
yes no yes
Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide). Leave together all "not soluble" salts and weak acids or bases:
[tex] {2H₃O}^{ + } (aq) + {2I}^{ - } (aq) + NiS(s)→ { Ni}^{2 + }(aq) + {2I}^{ - }(aq) + H₂S(g) + 2H₂O(l)[/tex]
Step 4: Cross out "spectator ions" that appear on both sides of the reaction (these ions do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:
[tex] {2H₃O}^{ + } (aq) + NiS(s) → { Ni}^{2 + } (aq) + H₂S(g) + 2H₂O(l)[/tex]
Related Questions
How many molecules are in 0.400 moles of dinitrogen pentoxide
Answers
Explanation:
The number of moles of a substance is represented by the following formula:
n=NNA
where, n
is the number of moles of the substance, N
is the total number of molecules present in a substance, andNA
is the Avogadro constant.
The given compound is N2O5
So one mole of N2O5
contains 6.023×1023
numbers of molecules. Thus the 0.400
moles of N2O5
contains a number of molecules => 0.400moles×6.023×10^23
.
=> 2.41×10^23 molecules.
there are 2.41 thats the anwser
what is the chemical formula for flourine?
Answers
Answer:
H2(g) + F2(g) ----> 2HF(g)
Answer = F2
When 3.00 g of hydrogen reacts with 4.00 g of oxygen, 4.00 g of water is formed.
(a) What is the limiting reactant?
(b) What is the theoretical yield?
(c) What is the percent yield?
Question 11 options:
a)
(a) oxygen
(b) 4.51 g
(c) 88.7 %
b)
(a) hydrogen
(b) 4.51 g
(c) 88.7 %
c)
(a) oxygen
(b) 4.05 g
(c)13.0 %
d)
(a) hydrogen
(b) 4.05 g
(c) 13.0 %
Answers
Answer:
Answer A
Explanation:
2 H2 + O2 = 2 H2O
knowing the mole weights of these elements shows O2 is the limiting reactant in this situation.
4 g oxygen is 4 /31.998 = .125 mole O2
We should get two times these moles of water = .250 moles
weight = .250 (1.008 * 2 + 15.999) = 4.50 gm H20 (theoretical)
....but we only got 4 gm
4/4.50 = 88.8%
What are the names of the compounds below?
Answers
Answer:
See below ~
Explanation:
a. 3-hydroxy, 3-methyl hexaneb. 3-methyl butanolc. Methoxy methaned. Propoxy ethanee. Ethoxy methane#1
Here the functional group attached is OH(Alcohol) so we need to use -ol suffix
There are total 6 carbons in the straight chain .Naming should be started from functional group.At max there can be 4carbons in the chain then on left hand sideRight hand side is 2 carboned substituent i.e it's ethyl group
Hence the naming is
2-ethyl-2-methyl butanol#2
Start numbering from alcohol towards left end .
4 carbons chainPent prefix to be usedThe name is
3-methyl-butanol#3
O is at centre and two methyl groups are branched both sides
Methoxy Methane#4
O is at centre,left side propane ,right side methane
Propoxy ethane#5
Left side ethane,Centred O,Right side methyl.
Ethoxy methane5. When you breathe, your lungs absorb oxygen
and release carbon dioxide. Which of these are
your lungs releasing?
(1) O
(2) O2
(3) CO
(4) CO2
(5) NH3
Answers
Get Brainliest quick!
In this food web, which organism eats meat-eaters?
A: 1
B: 6
C: 4
D: 3
Answers
Answer:
B.6
Explanation:
Organism is at the top and does not get eaten by anything else. That is why I think the correct answer is b :)
Have an amazing day!!
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A student diluted 10.0 milliliters (mL) of a 9.00 Molar (M) HCl solution in order to prepare a 0.50 M solution for his organic extraction analysis.What quantity of water, in mL, was added to make the 0.50M HCl solution?
A: 150
B: 160
C: 170
D: 180
Answers
The quantity of water in mL that was added to make the solution is 170 mL (option C)
How to determine the volume of the diluted solution Volume of stock solution (V₁) = 10 mL Molarity of stock solution (M₁) = 9 MMolarity of diluted solution (M₂) = 0.5 MVolume of diluted solution (V₂) =?M₁V₁ = M₂V₂
9 × 10 = 0.5 × V₂
90 = 0.5 × V₂
Divide both side by 0.5
V₂ = 90 / 0.5
V₂ = 180 mL
How to determine the volume of the water Volume of stock solution (V₁) = 10 mL Volume of diluted solution (V₂) = 180 mL Volume of water added =?Volume of water added = V₂ – V₁
Volume of water added = 180 – 10
Volume of water added = 170 mL
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How many moles of helium gas are present in a balloon with a volume of 950 ml a pressure of 3.47 atm and a temperature of 104 degrees celcius
Answers
Answer:
.107 moles
Explanation:
To find moles given the info above, we use a variation of the Ideal Gas Law,
mol = PV/RT, where P is in atm, V is in L, T is in K, and R is the gas constant
P=3.47 atmL= .950 LT= 377 KR= .08206mol= 3.47(.950) / 377(.08206)
=.107 moles H22.Uranium-235 has a half-life of about 700 million years. If 1 kg of U-235 is put on a shelf in
a laboratory, how much of it will be left after 700 million years? (5 points)
Answers
Answer:
.5 kg
Explanation:
At the start of Uranium-235 there is a total of 1 kg. Uranium-235 half life is 700 million years, take 1kg ÷2 = 0.5kg after 1 half life.
Let's say another 700 million years go by that means you take 0.5kg and divide that by 2.
0.5kg÷2= 0.25 kg is left after 2 half lives.
Hope this helps good luck!
A sample of gold has a mass of 38.6 grams and a volume of 2cm. What is the density of gold?
Answers
mass of the sample gold= 38.6g
volume =
[tex]2 {cm}^{3} [/tex]
to find:the density of the gold.
solution:D = m/V
[tex]m = 38.6g[/tex]
[tex] = 0.0386kg[/tex]
[tex]v = 2 {cm}^{3} [/tex]
[tex] = 0.000002 {m}^{3} [/tex]
then substitute the values.
[tex]d = \frac{0.0386}{0.000002} [/tex]
[tex]d = 19300kg | {m}^{3} [/tex]
therefore, the density of the sample gold is 19300kg/m3
what happens when muscle cells are triggered?
Answers
Answer:
When myocytes (aka muscle cells) are triggered at a certain point for awhile it can cause strain and pain throughout the muscle.
Matter is made of atoms that have positive centers of neutrons and protons
surrounded by a cloud of negatively charged electrons.
This statement is...
Answers
Answer:
the statement is a theory
Explanation:
Based on the differences in electronegativities, with which atom is francium (Fr) most likely to form an ionic bond?
A. Fr-Cl = 2.46
B. Fr-Se =1.76
C. Fr- At = 1.50
D. Fr-l =1.96
Answers
An ionic bond will be most likely formed between francium and chlorine having an electronegativity difference of 2.46.
What is is an ionic bond?An ionic bond is formed between to atoms that have a high difference in electronegativity between them. We now have to look out for the atoms that have a very high electronegativity difference. That pair is most likely to form an ionic bond.
Hence, an ionic bond will be most likely formed between francium and chlorine having an electronegativity difference of 2.46.
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HELP ME OUT PLS!!!!!!!!!
All stars begin their life in a
O black hole
O main sequence
O protostar
O nebula
Answers
nebula
↪ExplanationAll stars start in a large cloud of dust and gas called a nebula. Gravity can pull some of the gas and dust in a nebula together, forming a proto-star. A star is born when the gas and dust from a nebula become so hot and dense that hydrogen atoms are smashed together to form helium.
hope this helps...
How many moles of potassium chloride will be produced from 175 g of potassium chlorate?
Answers
Answer:
3.8 g
Explanation:
yan lng po maitutulong ko
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 2.34moles of potassium chloride will be produced from 175 g of potassium chlorate.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole =given mass ÷ molar mass
Molar mass of potassium chloride= 74.55 g/mol
Mass of potassium chloride= 175 g
Substituting the values in above formula we get
mole =175 g ÷ 74.55 g/mol
moles of potassium chloride=2.34moles
Therefore, 2.34moles of potassium chloride will be produced from 175 g of potassium chlorate.
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HELP!!! WILL MARK BRAINLIEST!!
The diagram below shows different positions of Earth and Mars around the sun.
Based on the diagram, which of these statements is correct?
Earth covers different areas in the same amount of time at position A and position B.
Earth covers a greater area in position A than in position B in the same amount of time.
Mars covers a greater area in position A than in position B in the same amount of time.
Mars covers the same area in the same amount of time at position A and position B.
Answers
Answer:
Earth covers a greater area in position A than in position B in the same amount of time.
Explanation:
Based on the diagram that shows different positions of Earth and Mars around the sun, it seems that this statement is correct:
Earth covers a greater area in position A than in position B in the same amount of time. (Covers as I understood it means "overshadowing" Mars)
For the reaction 2N2O5(g) → 4NO2(g) + O2(g) which of the following expressions is equal to the rate of the reaction?
Answers
Answer:
Rate=k[N2O5]^2
Explanation:
It is more accurate to determine the rate law using experimental data instead of stoichiometry. The answer I just gave was derived from stoichiometry.
The correct expression for the rate of the reaction [tex]\rm 2N_2O_5(g) ---- > 4NO_2(g)[/tex]+ O2(g) is Rate = Δ[[tex]\rm N_2O_5[/tex]] / (2Δt). Therefore, the correct option is B.
In the chemical equation, 2 moles of [tex]\rm N_2O_5[/tex]result in 4 moles of [tex]\rm NO_2[/tex]. The rate expression for the reaction can be expressed on the basis of stoichiometry as follows:
Rate = -Δ[[tex]\rm N_2O_5[/tex]] / (2Δt)
Because of the stoichiometric coefficient of 2, this expression shows that the rate of reaction is equal to the rate of decomposition of [tex]\rm N_2O_5[/tex]divided by 2. Since [tex]\rm N_2O_5[/tex]is a reactant in the forward process, the negative sign means that its concentration is decreasing with time. ,
Therefore, the correct option is B.
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Your question is incomplete, most probably the complete question is:
For the reaction 2N2O5(g) → 4NO2(g) + O2(g) which of the following expressions is equal to the rate of the reaction?
A) Rate = -Δ[N2O5] / Δt
B) Rate = Δ[N2O5] / (2Δt)
C) Rate = -Δ[NO2] / Δt
D) Rate = Δ[NO2] / (4Δt)
How much nuclear fuel produces as much energy as 2 to 3 million kilograms of coal?
1 thousand kilograms
1 million kilograms
1 kilogram
10 kilograms
Answers
Answer:
1 kilogram of nuclear fuel
Explanation:
Answer:
1 Kilogram.
Explanation:
I took the test and I got an A. Really hope this helps you, friend!
How many electrons are in an atom of nitrogen (N)?
The Periodic Table
A. 2
B. 7
C. 14
D. 5
Answers
Answer:
There are 7 electrons in the nitrogen atom two in k shell and 5 in l shell
Explanation:
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT PLEASE
Which answer best describes this reaction?
C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O bonded to H + H bonded to O bonded to C bonded above and below to H and to the right to C. Also bonded above, below, and to the right to H right arrow C is bonded above, left, and below to H, and right to a second C bonded above and below to H and to the right to a third C. That third C is double bonded above right to O and below right to O. That O is bonded to C bonded above and below to H and to the right to C, bonded above, below, and right to H + H Subscript 2 Baseline O.
formation of an ester by condensation
formation of an ether by condensation
formation of a new product using a substitution reaction
formation of a new product using an addition reaction
Answers
Answer:
formation of an ester by condensation
Explanation:
Edge 2022
Looking at the reaction sequence as described in the question, the ester can be said to be formed by condensation.
What is condensation?A condensation reaction is one in which a new compound is formed by the loss of a small molecule such as water from the two reacting compounds.
Looking at the reaction sequence as described in the question, the ester can be said to be formed by condensation. Hydrogen ion is lost from the first compound and -OH from the second one which is an instance of condensation.
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Show how you would convert 3-cyclopentylbutanal to a carboxylic acid.
Answers
Conversion of 3-cyclopentylbutanal to a carboxylic acid will be made possible through oxidation.
What is Oxidation?This is the process in a chemical reaction which involves the gain of oxygen atoms.
3-cyclopentyl butanal is oxidized to carboxylic acids using potassium dichromate(VI) solution which turns green in the presence of dilute sulfuric acid.
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An excess of nitrogen reacts with 32.6 grams of hydrogen. What volume of ammonia is produced at STP? N2(g) + 3H2(g) 2NH3(g)?
Answers
the volume of ammonia produced at STP.
solution:Mass of hydrogen is 32.6g
Molar mass of H2 = 2 g/mol
Moles of H = 32.6g/2g/mol = 16.3mol
N2(g) + 3H2(g) —-> 2NH3(g)
The Mole ratio of H to NH3 is 3 : 1
32.6 mole of H = 1/3 x 16.3= 10.87 mol = 5.43mol
Moles of NH3 = 5.43mol
At STP moles = volume/molar volume, but molar volume = 22.4L/mol
Moles = volume/molar volume, volume = moles X molar volume
Volume = 5.43 mol x 22.4L/mol
= 121.63 L
Volume of NH3 = 121.63L
Haley recorded several notes in her lab journal about the experiment. Which of her notes below is an interpretation of the data that she collected?
Answers
Answer:
picture
Explanation:
i need the picture
we need a picture to
answer this sire
carbon dioxide gas is not important for life. Do you agree or disagree?Explain your answer.
Answers
Answer:
Disagree carbon dioxide is one of the most important elements as it is present in nearly everywhere in our environment. We are also made from carbon. Carbon dioxide is present in our oceans. It is the most stable element in the periodic table therefore all element are compared to carbon-12 to calculate the relative mass of it from the element's isotopes. It is so important that a slight increase of CO2 production and other greenhouse gas production has the Earth become warmer causing it to have drastically impact our environment and also affecting our future.
In an ecosystem ,carbon dioxide is important so as to maintain the carbon foot prints.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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how many Aluminum atoms are in Al2O3
a. 3
b. 2
c. 5
d. 1
Answers
Given the data from the question, the number of aluminum atoms in aluminum oxide, Al₂O₃ is 2 (Option B)
Composition of aluminum oxide, Al₂O₃From the formula of the compound, Al₂O₃ we see that the compound is composed of
Aluminum Oxygen How to determine the number of aluminum atoms Formula of compound = Al₂O₃Number of oxygen atoms j= 3 × 1 = 3Number of aluminum atoms = 2 × 1 = 2From the above, we can conclude that Al₂O₃ contains 2 atoms of aluminum.
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what is the molar mass of slicon
Answers
Answer:
28.0855 grams per mole
Can marble turn back into limestone?
Answers
Answer:
the alteration of limestone by heat and pressure.
Explanation:
Answer:
YES :)
Explanation:
How does marble turn back into Limestone?
»MARBLE is a Metharopic rock formed by the alternation of Limestone by heat and pressure
»The calcite in the limestone changes and fosills and layering in the original limestone disappear as interlocking grains grow.
»If the limestone is pure ,a white marble is formed
A gas containing 80% CH4 and 20% He is sent through a quart/ diffusion tube (see Figure P8.8) to recover the helium, Twenty percent by weight of the original gas is recovered, and its composition is 50% He. Calculate the composition of the waste gas if 100 kg moles of gas are processed per minute.
Answers
For a gas containing 80% CH4 and 20% He is sent through a quart diffusion tube, the composition is mathematically given as
%He=12.5%
%CH4=87.5%
What is the composition of the waste gas if 100 kg moles of gas are processed per minute?Generally, the equation for the Material balance is mathematically given as
F=R+W
Therefore
100=0.20*1000+W
W=80kmol/min
In conclusion, waste gas compose
2.0/100*100=50/100*20+%*80
Hence
%He=12.5%
%CH4=87.5%
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Determine the number of atoms in 30.0g of Ne
Answers
PLEASE HELP!!!
Using the rules that you learned during the session, what is the answer to the following question?
55.78 * 23.7
Answers
1,321.986
1,321.99
1,322
1,320
Answers
Answer:
(d) 1,320
Explanation:
You want the product 55.78 × 23.7 rounded appropriately.
Significant figuresWhen a number has both an integer part and a decimal fraction, all of the digits are significant. Here, that means the first number has 4 significant figures, and the second number has 3 significant figures.
The number of significant figures in a product or quotient will be the least of the numbers of significant figures of the contributors. Here, the product can only have 3 significant figures.
55.78 × 23.7 = 1321.986 ≈ 1320 . . . . rounded to 3 sf
Using the rules for significant figures, the answer is 1320.
__
Additional comment
Generally, the rules for significant figures apply to quantities derived from measurements. They can also be applied to estimates, where the result of computation using numbers of different precision cannot have any more accuracy than the least precise contributor.
The other useful rule in this process is that the rounding is saved for the final answer. Intermediate results should be carried to the full precision available.
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