From the reaction, we can see that the number of moles produced is 2.5 moles of Na2SO4
What is a reaction?Chemical reaction involves the combination between two or more species. In this case, the reaction equation is; 2NaOH + H2S04 ----> Na2SO4 + 2H20.
Now we are told that sulfuric acid is in excess hence NaOH is the limiting reactant.
If 2 moles of NaOH produces 1 mole of Na2SO4
5 moles of NaOH produces 5 moles * 1 mole/ 2 moles
= 2.5 moles of Na2SO4
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A gaseous hydrogen is stored at 500 Bar and 25 oC in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z
The mass of the hydrogen gas in tank, given the data is 6.17 Kg
Data obtained from the questionPressure (P) = 500 Bar = 500 × 0.986923 = 493.4615 atmTemperature (T) = 25 °C = 25 + 273 = 298 K Volume (V) = 220 L Gas constant (R) = 0.0821 atm.L/Kmol Compressibility factor (z) = 1.45Molar mass of hydrogen gas = 2.016 g/molMass of hydrogen gas (m) =? How to determine the mass
PV = znRT
Divid both sides by zRT
n = PV / zRT
but
mole (n) = mass (m) / molar mass (M)
Thus,
m / M = PV / zRT
m = MPV / zRT
m = (2.016 × 493.4615 × 220) / (1.45 × 0.0821 × 298)
m = 6169 g
Divide by 1000 to express in Kg
m = 6169 / 1000
m = 6.17 Kg
Complete question
A gaseous hydrogen stored at 500 Bar and 25°C in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z = 1.45
3.06 kg
6.17 kg.
13.0 kg
5.05 kg
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What kind of nuclear reaction is seen in (image)?
Answer:
Beta decay
Explanation:
A beta particle (also known as an electron) is being emitted from the nuclide.
HELP FAST PLEASE! What is the limiting reactant if 43.4 g of NH3 react with 30 g of NO? The balanced equation is 4NH3 + 6NO --> 5N2 + 6H2O.
Choices:
A. H2O
B. NH3
C. NO
D. N2
The limiting reactant in the reaction is the NO molecule.
What is limiting reactant?The limiting reactant is the reactant that is present in the least amount in the reaction. The rate of reaction depends on the limiting reactant.
Given the reaction; 4NH3 + 6NO --> 5N2 + 6H2O.
Number of moles of NH3 = 43.4 g/17 g/mol = 2.55 moles
Number of moles of NO = 30 g/30 g/mol = 1 mole
Now if 4 moles of NH3 reacts with 6 moles of NO
2.55 moles of NH3 reacts with 2.55 moles * 6 moles/ 4 moles
= 3.8 moles
Hence, the limiting reactant in this reaction is NO.
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Chemical bonds are formed when valence electrons are:
Chemical bonds are formed when valence electrons are shared or donated.
Chemical bondsChemical bonds are formed between two or more atoms when electrons are transferred or shared between or among the participating atoms.
For example, ionic bonds are formed when a metal ion such as Na donates its valence electrons to a non-metallic ion such as Cl to form NaCl.
Covalent bonds are formed when participating ions shared their valence electrons to give each other octet states.
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Explain how you know it must be oxygen. Where
did the oxygen come from?
Intro
Previous Activity
I
000
O Tutoring Help
Answer:
oxygen is a present in our atmosphere and mixed with other gases on the surrounding screen plants are also measure source of getting oxygen they take carbon dioxide from making their food by for the cities and give away oxygen in return
Explanation:
most of the earth oxygen comes from tiny Ocean plants are called phytoplaston
what must happen for carbon dioxide to sublimate at a given pressure?
a. energy must transfer from the carbon dioxide to its surroundings.
b. the average kinetic energy of the carbon dioxide molecules must
decrease.
o c. the orderliness of the carbon dioxide molecules must increase.
d. energy must transfer to the carbon dioxide from its surroundings.
Answer: d. energy must transfer to the carbon dioxide from its surroundings.
Explanation:
Sublimation is the phase change from a solid to a gas, meaning that the particles will have more kinetic energy (since particles in the solid phase are more ordered than particles in the gas phase, and thus particles in the gas phase have more energy). Thus, for sublimation to occur, the particles need more energy, which must come from its surroundings.
How many grams MnO2 are needed
to generate 126.0 g Zn(OH)2?
Zn + 2MnO₂ + H₂O → Zn(OH)2 + Mn₂O3
The mass of manganese oxide (MnO2) that is needed to generate 126.0 g Zn(OH)2 is 220.56 g.
Mass of manganese oxide needed
The mass of MnO2 that is needed to generate 126.0 g Zn(OH)2 is calculated as follows;
Zn + 2MnO₂ + H₂O → Zn(OH)2 + Mn₂O3
From the reaction above;
2(87 g/mol of MnO₂) ---------> 99.4 g/mol of Zn(OH)2
174 ---------------------> 99.4
? -------------------------> 126
= (126 x 174)/99.4
= 220.56 g
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Answer:
220.56
Explanation:
When you breathe, oxygen binds to the hemoglobin in your lungs and then is released into tissue cells. What type of reaction is this? A. Haber B. Irreversible C. Reversible D. Double replacement
Answer:
i believe c. reversible
Explanation:
oxygen combines with hemoglobin and detaches
Answer:
c
Explanation:
same answer i got from quiz
The table describes solids and plasmas.
-
Which statement can be placed in the blank cell to make the information in the table accurate?
can be crystalline
can be amorphous
are made of charged particles
are made of neutral particles
The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
Meaning of plasmaPlasma can be defined as a form of matter, though its not as common as the three major forms of matter.
Plasma displays more of the features of a gas but it is not a gas. it has more density than a gas and is less dense than liquid and solid
In conclusion, The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
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Answer:
Answer is (D) or fourth option
Explanation:
Plasmas are made of neutral particles
A sample of a gas at room temperature occupies a volume of 24.0 L at a pressure of 602 torr . If the pressure changes to 3010 torr , with no change in the temperature or moles of gas, what is the new volume, V2
Answer:
V₂ = 4.80 L
Explanation:
Because you are dealing solely with pressure and volume, you can find the new volume using the Boyle's Law equation. The general equation looks like this:
P₁V₁ = P₂V₂
In this form, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the new pressure and volume. You have been given all of the variables but V₂. Therefore, by plugging these values into the equation, you can simplify to find your answer.
P₁ = 602 torr V₁ = 24.0 L
P₂ = 3010 torr V₂ = ?
P₁V₁ = P₂V₂ <---- Boyle's Law equation
(602 torr)(24.0L) = (3010 torr)V₂ <---- Plug variables into equation
144448 = (3010 torr)V₂ <---- Multiply 602 and 24.0
4.80 = V₂ <---- Divide both sides by 3010
The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and...
The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and temperature.
What are micro organism?Micro Organism are organism that can be seen with a microscope.
Microorganisms include bacteria, protozoa, algae, and fungi.
Micro organisms exist in its single-celled form or as a colony of cells.
The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and temperature.
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what could cause an error DNA in replication
NOTICE: There are attachments attached to this answer that is mentioned in each paragraph!
We frequently see DNA replication as a well-organized, methodical process, much like a production line. It's not. For the DNA polymerase to read it, the DNA must not lie in a straight line and must be in motion, not static. It is curled and twisted. First, realize that this is a molecular issue. Bacteria lack neurons, cannot "think," and cannot make decisions. Everything is a chemical reaction, and chemical reactions frequently depend on one concentration's osmotic pressure being higher than another, both inside the cell and outside. Even at that level, there is a lot of "nothing," albeit nothing is empty. For a better understanding of the environment, picture a cell as a large room filled with balls of all sizes. Each ball has a unique form and isn't spherical; some balls fit together flawlessly while others don't. This is the easiest way to conceptualize the universe of molecular chemistry. There is never "nothing" other than in space when you push your way through layers upon layers of free oxygen, free nitrogen, helium, carbon dioxide, hydrogen dioxide, argon, methane, etc. when you walk through what we term "air."
Replication mistakes happen. Sometimes DNA polymerase enzymes add the incorrect nucleotide, too many, or too few nucleotides to a sequence. Or the DNA polymerase gets looped on the same strand, adding a few codons in a repetition before the strand slips away and it continues, or there is a tangle of crossing DNA and it jumps to the incorrect thread and back (or never), etc. In order to ensure that the bases added to a developing strand are appropriately matched with their complements, DNA polymerase enzymes are quite picky about the nucleotides they choose to use. However, these enzymes do make errors. Specifically, at a rate of around 1 per 100,000 nucleotides. Doesn't sound like much, but since each diploid cell has 6 billion base pairs, there are around 120,000 errors every cell division.
Ribosomal errors during transcription can even change the synthesis of the DNA polymerase proteins, leading to the creation of a mechanism that is already faulty. Since not all ribosomes are created equally, ribosome quality is important. Bacterial mutation rates are greater because bacterial ribosomes are less accurate and produce a lot more errors than human ribosomes. That is a benefit for simple, quickly reproducing life, which is also very vulnerable to the stresses of the molecular chemical environment. Unlike most more complex forms of life, which also have DNA repair mechanisms incorporated into the DNA polymerase, humans have these mechanisms. Some of these processes can often correct mistakes as soon as they are produced, while others can do so over time.
Regarding the pairing of C and T, etc. There are a number of balls in that room that, at first glance, appear to be identical, but if you compare two closely, you could find that one bump is larger or is located incorrectly even if it appears to be same. Proton shift is one such. Here are two instances using the purine guanine (G) and the pyrimidine thymine (T) (G). Please excuse my handwriting; I learned to type at a very young age. Shifted on the right, normal on the left. NA polymerase (as do most more complex forms of life) frequently correct mistakes as soon as they are made and others that correct mistakes later.
(ATTATCHMENT #1)
What are some possible bias in an experiment about how sleep affects mood
HELP ASAPPPPP
Answer: Some possible bias in an experiment about how sleep affects mood could be a person's average mood with or without sleep, how people are acting in the experiment compared to how they actually would in their normal environment, or even how the person collected the data for the experiment interprets their moods.
Explanation:
1. A person's mood could be relatively different depending on other factors than just sleep, so it could affect experiment. For example if an emotional crisis had occurred recently, it could affect your mood and environmental factors could affected your mood, like weather.
2. A person could also change their mood around strangers or even when participating in the experiment. For instance if they aren't comfortable with the person taking down the analysist or the other test subjects, they make act differently than they usually do at home where they're comfortable.
3. A person collecting the data will have to know how to specify and determine a persons mood with their instruments. For example, if they're doing it just by talking with the test subjects, they'll have to know how to properly understand their different stages of each of their moods with out the data collectors mood changing as well. Also, if the data collectors mood is changed at all it can slightly affect the experiments results as well.
What is produced during the replacement reaction of ba(no3)2 and na2so4? 2bana 2no3so4 2nano3 baso4 nano3 baso4 bana2 (no3)2so4
2NaNO3(aq) + BaSO4 = Ba(NO3)2(aq) + Na2SO4(aq) (s)
Procedures involved:
The cations or anions may transfer positions in this twofold replacement/displacement reaction, which results in AB + CD AD + CB. In such a reaction, water, an insoluble gas, or an insoluble solid must be one of the byproducts (precipitate). The reaction in question has the following molecular equation:
2NaNO3(aq) + BaSO4 = Ba(NO3)2(aq) + Na2SO4(aq) (s)
Double displacement:
When two atoms or groups of atoms swap positions, a double displacement reaction occurs, creating new compounds. Typically, aqueous solutions are where it happens.
Na2SO4 + BaCl2 BaSO4 + 2NaCl is an example of a double displacement reaction.
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Citric acid (C6H8O7) is an important intermediate in the Krebs cycle and a triprotic acid. What is the normality of a solution made by weighing 128 g of citric acid into a volumetric flask and diluting it to 2 L with water
Answer:
2.67 N
Explanation:
The normality equation looks like this:
Normality = Molarity (M) x Number of Equivalents
In this formula, the number of equivalents represents how many moles of the acidic species exist in the molecule. In other words, how many hydrogen atoms are in citric acid? This value would be 8 equivalents (as denoted by the subscript).
So, to find the normality, you need to (1) convert grams C₆H₈O₇ to moles (via molar mass), then (2) calculate the molarity (via molarity equation using moles and volume), and then (3) calculate normality (via normality equation using molarity and # of eq.).
(Step 1)
Molar Mass (C₆H₈O₇): 6(12.011 g/mol) + 8(1.008 g/mol) + 7 (15.998 g/mol)
Molar Mass (C₆H₈O₇): 192.116 g/mol
128 g C₆H₈O₇ 1 mole
---------------------- x ---------------------- = 0.666 moles C₆H₈O₇
192.116 g
(Step 2)
Molarity = moles / volume (L)
Molarity = 0.666 moles C₆H₈O₇ / 2 L H₂O
Molarity = 0.333 M
(Step 3)
C₆H₈O₇ -----> 8 hydrogen atoms
Normality = molarity x number of equivalents
Normality = 0.333 M x 8
Normality = 2.67 N
two different substance can have the same properties
Yes, you're absolutely correct
not sure on what to do
Answer:
It's the first answer
Explanation:
Aqueous just means that the solution is just dissolved in water
Solid aluminum and oxygen gas react to form solid aluminum oxide. Suppose you have 3.0 mol of Al and 11.0 mol of O2 in a reactor. Suppose as much as possible of the reacts. How much will be left? Round your answer to the nearest 0.1 mol.
8.75 moles of oxygen will be left
The reaction is
Al(s) + O₂(g) -----> Al₂O₃(s)
On balancing the equation, we get:
4Al(s) + 3O₂(g) -----> 2Al₂O₃(s)
If 3 mol of Al reacts, we need 3/4 x 3 = 9/4 = 2.25 mol of oxygenIf 11 mol of oxygen reactions, we need 11/3 x 4 = 44/3 = 14.7 mol of AluminiumBut we only have 3 mol of AlAluminium is the limiting reagent and all 3 moles of Al will reactWe get 2 moles of aluminium oxide from 4 moles of aluminium. So from 3 moles of aluminium, we get:3/4 x 2 = 6/4 = 1.5 moles of aluminium oxide
If we use 4 moles of Al, we need 3 moles of oxygenSo when we use 3 moles of Al, we need3/4 x 3 = 9/4 = 2.25 mol of oxygen
We had 11 moles of oxygenThe amount of oxygen left = 11-2.25 = 8.75 mol8.75 moles of oxygen will be left
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Why do lunar and solar eclipses not happen every month?
What are the five (5) things that can indicate a chemical change has occurred?
Write out the combinations that indicate a chemical change, explain how you know.
Answer: Bubbles, burning, odor, color change, and rusting.
Explanation: Chemical changes are changes to something that is irreversible.
Liquid tetrabromoethane has a density of 2.96 g/mL. A barometer is constructed using tetrabromoethane instead of mercury. If the atmospheric pressure is 0.971 atm, what is the height of the tetrabromoethane column in the barometer in cm
16.06 cm is the height of the tetra bromoethane column in the barometer in cm.
What is barometer?A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure.
Explanation:
Pressure of the liquid column=ρgh
ρ= density of the liquid
h= height of the column
g= due to gravity
the
height of the mercury column corresponding to 0.971 atm
= 0.951×76÷1atm = 73.796 cm
[tex]\rho_1h_1g=\rho_2h_2g[/tex]
2.96 g/mL x 73.796 cm =13.6 g/mL [tex]h_2[/tex]
[tex]h_2[/tex]=16.06148235 =16.06 cm
16.06 cm is the height of the tetra bromoethane column in the barometer in cm.
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GIVING 17 POINTS PLS HELP ME!!!!
Which of the following statements is true about hydropower?
A. It releases carbon dioxide.
B. It can produce harmful chemicals.
C. It can affect fish and other marine life.
D. It uses gas trapped under Earth's surface.
Hydropower can affect fish and other marine life which is the true statement and is denoted as option C.
What is Hydropower?
This is the process in which water energy is converted into electrical energy through the use of dams and turbines.
When the dams are created, it blocks the path of marine activities and limits them to certain activities such as reproduction.
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What is the weighted average of a
bean in the sample data given?
Sample Number
of Beans
Black
Eyed Peas
Cannellini
Beans
410
90
Abundance Mass
(%)
(g)
1.32
82
18
2.94
Weighted
Average (g)
[?]
Answer: 1.6116
Explanation:
[tex](1.32)(0.82)+(2.94)(0.18)=\boxed{1.6116}[/tex]
The weighted average of a bean in the given sample data is equal to 1.6116 g.
What is the Weighted Average?The weighted average can be described as a calculation that takes into account the varying degrees of importance of the numbers in a data set. Each number is multiplied by a predetermined weight in the given data set before the final calculation is made in calculating a weighted average.
A weighted average assigns weights that calculate in advance the relative abundance of each data point. A weighted average is commonly determined to equalize the frequency of the values in a data set.
Given the abundance of Black eyes peas, m₁ = 82% = 0.82
The mass of the Black eyes peas, W₁ = 1.32 g
the abundance of cannellini beans, m₂ = 18% 0.18
The mass of cannellini beans, W₂ = 2.94 g
The weighted average = m₁W₁ + m₂W₂ = 1.32× 0.82 + 2.94 ×0.18
The weighted average of a bean = 1.6116 g
Therefore, the weighted average of a bean in the sample is 1.6116 g.
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Question 3
Not yet
answered
Points out of
If you dissolve 2.70 g of NaCl in 425 mL of water, what is the molarity of the
solution? (Report your answer to three places past the decimal point. Moodle is
looking for a number only, no units.)
Answer: 0.118M
Explanation:
The formula for molarity is: [tex]M=\frac{mol solute}{L solution}[/tex]
First, we need to find the number of moles of NaCl.
[tex]2.70gNaCl*\frac{1molNaCl}{58.44gNaCl} =0.05molNaCl[/tex]
Next, we must convert millimeters to liters. We can do that by dividing the number of mL by 1000.
[tex]\frac{425mL}{1000} =0.425L[/tex]
Now we have our needed data! All we need to do now is plug in our data to the molarity formula.
[tex]M=\frac{0.05mol}{0.425L} =0.118M[/tex]
I hope this helps! Pls mark brainliest!! :)
Rafa then places some zinc in a solution of lead nitrate. A displacement
reaction takes place. Write the word equation for this reaction.
Answer:
Explanation:
A solution of zinc metal and lead nitrate react to form zinc nitrate and lead metal.
Zn(s) + Pb(NO3)2 = Zn(NO3)2 + Pb
A cup of hot water loses 265 cal
of energy to its surroundings.
How many joules of energy is
this?
[?] joules
Answer:
-1071 Joules
Explanation:
The Joule was introduced as the SI unit for energy in 1925. One calorie is equal to approximately 4.184 joules(J). This is a conversion factor that we can write two ways:
(1cal/4.184J) or (4.184J/1cal)
(265 cal)*(4.184J/1cal) = 1071 J
Since the energy is leaving the system, it should be written with a minus sign: -1071J
Answer:
1,108.76 joules
Explanation:
There are 4.184 joules per calorie
4.184 x 265 = 1,108.76
Natural gas (CH4) has a molar mass of 16.0 g/mole. You started out the day with a tank containing 200.0 g of natural gas. At the end of the day, your tank contains 30.0 g of natural gas. How many moles of gas did you use
Considering the definition of molar mass, the moles of gas used are 10.625 moles.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Amount of moles usedNatural gas has a molar mass of 16.0 g/mole.
You started out the day with a tank containing 200.0 g of natural gas. So, you can apply the following rule of three: If by definition of molar mass 16 grams are contained in 1 mole, 200 grams are contained in how many moles?
[tex]amount of moles at the beginning=\frac{200 gramsx1 mole}{16 grams}[/tex]
amount of moles at the beginning= 12.5 moles
At the end of the day, your tank contains 30.0 g of natural gas. So, you can apply the following rule of three: If by definition of molar mass 16 grams are contained in 1 mole, 30 grams are contained in how many moles?
[tex]amount of moles at the end=\frac{30 gramsx1 mole}{16 grams}[/tex]
amount of moles at the end= 1.875 moles
The number of moles used will be the difference between the number of moles used initially and the contents at the end of the day.
moles used= amount of moles at the beginning - amount of moles at the end
moles used= 12.5 moles - 1.875 moles
moles used= 10.625 moles
Finally, the moles of gas used are 10.625 moles.
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Atoms and the chemical bonds that connect them cannot be observed with your eyes, so it is necessary to use a
a. microscope
b. theory
c. model
d. both (b) and (c)
Answer: d. both (b) and (c)
Explanation:
Atoms are too small to be seen on microscopes, so we model them based on theories.
What is the correct formula that would result from the combination of the two ionic species?
Cs¹+ and Cl¹-
Answer: CsCl
Explanation:
When naming ionic compounds, the metal comes before the nonmetal.
What does the author predict about the future of the Earth's mantle? Do you support his educated guess? Use complete sentences to answer.
The earth's mantle will not change in the future because this region is safe from the intervention of human beings.
What happens in the Earth's mantle?The transfer of heat and material in the mantle helps us to determine the landscape of Earth. Activity in the mantle moves the plate tectonics, that contributes to volcanoes, seafloor spreading, earthquakes, and building of mountains.
So we can conclude that the earth's mantle will not change in the future because this region is safe from the intervention of human beings.
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