During a synthesis reaction, 3. 2 grams of magnesium reacted with 12. 0 grams of oxygen. What is the maximum amount of magnesium oxide that can be produce during the reaction
Answers
The maximum amount of magnesium oxide that can be produced during the synthesis reaction between 3.2 grams of magnesium and 12.0 grams of oxygen is 14.4 grams.
This is because the amount of product produced in a synthesis reaction is limited by the amount of the reactant with the lowest mass. In this case, the reactant with the lowest mass is the 3.2 grams of magnesium, so the maximum amount of magnesium oxide that can be produced is 3.2 grams of magnesium multiplied by the mole ratio of magnesium oxide to magnesium, which is 1:1, resulting in 3.2 grams of magnesium oxide.
Therefore, the maximum amount of magnesium oxide that can be produced during the reaction is 14.4 grams (3.2 grams of magnesium multiplied by 4.5 grams of oxygen, which is the mole ratio for magnesium oxide to oxygen).
This is due to the Law of Conservation of Mass, which states that mass is neither created nor destroyed during a chemical reaction, only rearranged.
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Related Questions
C. Which nonmetal appears to attract electrons the most?
Answers
Answer:
Fluorine appears to attract electrons the most.
Answer: The answer to the question would have to be FLOURINE !!
Question 4 of 10
Which kind of covalent bond has unequal sharing of electrons?
A. A hydrogen bond
B. A polar condiment bond
C. A Van der Waals bond
D. A nonpolar covalent bond
Answers
Answer:
A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal.
Explanation: In a polar covalent bond, sometimes simply called a polar bond, the distribution of electrons around the molecule is no longer symmetrical. Hope this helped :)
What are the FOUR major biogeochemical cycles upon which all life depends?
Answers
Answer:
Some of the major biogeochemical cycles are as follows: (1) Water Cycle or Hydrologic Cycle (2) Carbon-Cycle (3) Nitrogen Cycle (4) Oxygen Cycle. The producers of an ecosystem take up several basic inorganic nutrients from their non-living environment.
Explanation:
in this experiment, you qualitatively observed reactions and recorded observations. there is error associated with this. meika thinks its a systematic error. select the option that best defends meika's position. a. you will carefully time each part of the experiment
b. the experimental work will consist mostly of careful observation, recorded concisely and accurately
c. your work needs to be of higher quality than you have previously demonstrated
d. you will be doing many quantitative measurements, for example weighings, etc.
Answers
Meika's position is best defended by the experimental work will consist mostly of careful observation, recorded concisely and accurately. Thus, option b is correct.
Systematic error is an error that occurs because of a constant offset from the actual value due to a flaw in the procedure or equipment.
By carefully timing each part of the experiment, you eliminate the possibility of systematic errors due to variations in timekeeping.
Therefore, Maika's position would best be defended by the experimental work will consist mostly of careful observation, recorded concisely and accurately." Although this option is a good defense for the experiment, it directly addresses Meika's position.
This statement implies that the error associated with the experiment could be related to the way the observations were made, recorded, or interpreted, which suggests a possible systematic error.
Thus, option b is correct.
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what type of chemical reaction is SrCl2 + F2 → SrF2 + Cl2
Answers
single replacement
example of a single replacement:
AB + C —> AC + B
Which of the following describes a star with a hydrogen-burning shell and an inert helium core? A) It is a red giant that grows in luminosity until it dies in a planetary nebula. B) It is a subgiant that gradually grows dimmer as its hydrogen-burning shell expands and cools. C) It is a subgiant that grows in luminosity until helium fusion begins in the central core. D) It is what is known as a helium-burning star, which has both helium fusion in its core and hydrogen fusion in a shell.
Answers
The correct answer to this question is option B. A star with a hydrogen-burning shell and an inert helium core is known as a subgiant. As the hydrogen-burning shell of the star expands and cools, the star gradually grows dimmer. This is because the outer envelope of the star becomes cooler, which causes a decrease in the overall luminosity of the star.
Option A, which describes a red giant that grows in luminosity until it dies in a planetary nebula, is not correct. This is because a red giant is a star that has exhausted its core hydrogen and has moved on to helium fusion.
Option C, which describes a subgiant that grows in luminosity until helium fusion begins in the central core, is also not correct. This is because a star with an inert helium core cannot undergo helium fusion in its central core.
Option D, which describes a helium-burning star that has both helium fusion in its core and hydrogen fusion in a shell, is not correct. This is because a star with an inert helium core cannot undergo helium fusion in its central core.
Therefore, the correct answer is option B, which describes a subgiant that gradually grows dimmer as its hydrogen-burning shell expands and cools.
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1. A newspaper article wrote about a study in which researchers subjected laboratory gloves to stress. Among 240 vinyl gloves, 63% leaked. Among 240 latex gloves, 7% leaked. Calculate the claim that vinyl gloves have a higher leak rate than latex gloves. Use 0.005 significance level.
Answers
The claim that vinyl gloves have a higher leak rate than latex gloves is supported by the study at a significance level of 0.005.
To determine if vinyl gloves have a higher leak rate than latex gloves, we can conduct a hypothesis test.
The z-value is calculated as:
z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))
where p₁ and p₂ are the sample proportions, and n₁ and n₂ are the sample sizes.
Certainly! Let's calculate the z-value to determine if vinyl gloves have a higher leak rate than latex gloves.
For vinyl gloves:
Sample size (n₁) = 240
Leaking gloves (x₁) = 0.63 * 240 = 151.2 (approximated to 151)
For latex gloves:
Sample size (n₂) = 240
Leaking gloves (x₂) = 0.07 * 240 = 16.8 (approximated to 17)
We will calculate the z-value using the formula:
z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))
where p₁ and p₂ are the sample proportions.
p₁ = x₁ / n₁ = 151 / 240 ≈ 0.629
p₂ = x₂ / n₂ = 17 / 240 ≈ 0.071
Calculating the z-value:
z = (0.629 - 0.071) / √((0.629 * (1 - 0.629) / 240) + (0.071 * (1 - 0.071) / 240))
z ≈ 13.239
The calculated z-value is approximately 13.239. To determine if the claim is supported, we compare this value to the critical z-value for a one-tailed test at a significance level of 0.005.
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I don't know how to write about tentative.....can u help me?
Answers
Answer:
The definition of tentative is not definite or final. An example of tentative is possible, though not definite, plans to go to the movies sometime on Friday.
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Which is evidence that a chemical reaction has likely occurred?
a liquid slowly losing volume
the formation of a precipitate
boiling water releasing steam
a change in the shape of a solid
Answers
Answer:
The new substance will need more energy to form its chemical bonds than the old substance will release. ... More energy will be released from the old substance than the new substance will need to form its chemical bonds.
Explanation:
This is the answer I got. Hope it's really helpful
Answer:
"Which is evidence that a chemical reaction has likely occurred?"
The correct answer would be,
B. the formation of a precipitate
Explanation:
Got it right on my test, have a great day!
Calculate the molarity of a nitric acid solution if 38 ml of the solution is neutralized by 16 ml of 0.25 M barium hydroxide solution. The balanced equation for the reaction is
Answers
Answer:
l
Explanation:
29. A branched chain amino acid is a. Cys b. Leu c. Glu d. Lys 30. An aa often involved in Redox reactions is a. Cvs b. Leu c. Glu d. Lys 31. The minimum number of electrons that FAD can carry is a. 1 b. 2 c. 3 d. 4 32. NAD carries a. protons b. electrons c. hydride 33. The aa with the highest tendency to make a-helices is a. Gly b. Pro c. Ala 34. A common residue in type I b-turns is a. a. Gly b. Pro c. Ala www d. hydrogen atoms d. Leu www. d. Leu
Answers
30. A branched-chain amino acid is (b) Leu (Leucine). Branched-chain amino acids have a non-linear or branched side chain structure. Leucine is one of the three branched-chain amino acids commonly found in proteins.
31. An amino acid often involved in redox reactions is (d) Lys (Lysine). Lysine contains a side chain with an amino group and a positively charged amino group, which can participate in electron transfer during redox reactions.
32. The minimum number of electrons that FAD (Flavin adenine dinucleotide) can carry is (b) 2. FAD is a redox-active coenzyme involved in various biological processes, including carrying and transferring electrons.
33. The amino acid with the highest tendency to form α-helices is (c) Ala (Alanine). Alanine is a small, non-polar amino acid that readily fits into the α-helix structure due to its conformational flexibility and favorable interactions with neighboring amino acids.
34. A common residue in type I β-turns is (b) Pro (Proline). Proline is often found in the second position of type I β-turns due to its unique cyclic structure, which helps induce the sharp turn required for this secondary structure motif.
In conclusion, the answers to the given questions are:
30. (b) Leu
31. (d) Lys
32. (b) 2
33. (c) Ala
34. (b) Pro
These amino acids and their characteristics play important roles in protein structure, function, and various biochemical processes in living organisms.
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why is it important to conduct scientific tests more than one time
Answers
Answer:
you man get different results
Consider a reaction whose rate constant is 3. 4 m-1s-1 at 600k and 31. 0 m-1s-1 at 750k. Find the activation energy (in kj/mol) of the reaction. Express your answer to 2 decimal places
Answers
The activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.
To find the activation energy (Ea) of the reaction, we can use the Arrhenius equation, which relates the rate constant (k) to the temperature (T) and activation energy. The Arrhenius equation is given by:
k = A * e^(-Ea/RT)
Where:
k is the rate constant
A is the pre-exponential factor (frequency factor)
Ea is the activation energy
R is the gas constant (8.314 J/(mol·K))
T is the temperature in Kelvin
We have two sets of data:
At 600 K, k1 = 3.4 m^(-1)s^(-1)
At 750 K, k2 = 31.0 m^(-1)s^(-1)
Taking the natural logarithm (ln) of both sides of the Arrhenius equation, we can rearrange the equation to solve for the activation energy:
ln(k) = ln(A) - (Ea/RT)
We can create two equations using the given data:
ln(k1) = ln(A) - (Ea/(R * 600))
ln(k2) = ln(A) - (Ea/(R * 750))
Subtracting the second equation from the first eliminates the ln(A) term:
ln(k1) - ln(k2) = (Ea/R) * ((1/600) - (1/750))
Simplifying further:
ln(k1/k2) = (Ea/R) * ((750 - 600) / (600 * 750))
Now we can solve for Ea:
Ea = (R * (ln(k1/k2))) / ((750 - 600) / (600 * 750))
Using the given values and the appropriate units:
Ea = (8.314 J/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))
Converting the units from J to kJ:
Ea = (8.314 × 10^(-3) kJ/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))
Ea ≈ 71.46 kJ/mol
Therefore, the activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.
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the diagram below shows the periodic table of the elements. Which pair of elements listed below has properties that are the most similar to each other?
explain why it’s the answer.
Answers
How much energy is required to convert 100.0 g of water completely
to steam?
Answers
Answer:
225.6 kJ, assuming the water is already at 100 °C
Explanation:
The correct answer to this question will depend on the initial temperature of the water to which heat is added to produce steam. Energy is required to raise the water temperature to 100°C. At that point, an energy of vaporization is needed to convert liquid water at 100 °C to water vapor at 100°C. The heat of vaporization for water is 2256.4 kJ/kg. The energy required to bring 100g of water from a lower temperature to 100°C is calculated at 4.186 J/g°C. We don't know the starting temperature, so this step cannot be calculated.
Assuming that we are already at 100 °C, we can calculate the heat required for vaporization:
(100.0g)(1000.0g/1 kg)(2256.4 kJ/kg) = 225.6 kJ for 100 grams water.
An old refrigerator is rated at 500 W how many kilowatt hours of electric energy what does refrigerator use in 30 days assume the refrigerator is running 12 hours per day
Answers
The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.
Given:
Power rating of the refrigerator = 500 W
Running time per day = 12 hours
Number of days = 30
First, we need to convert the power rating from watts to kilowatts:
Power rating = 500 W / 1000 = 0.5 kW
Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:
Energy used = Power rating × Running time × Number of days
Energy used = 0.5 kW × 12 hours/day × 30 days
Energy used = 180 kWh
Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
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Place the steps required to calculate the activation energy (Ea) from the Arrhenius equation in the correct order. Start with the first step at the top of the list.
k = Ae-Ea/RT
Answers
1. Collect data on the rate constants (k) of the reaction at various temperatures, (2) Take the natural logarithm of the Arrhenius equation to obtain a linear equation: ln(k) = ln(A) - Ea/RT.
3. Plot ln(k) vs 1/T and determine the slope of the line. 4. Use the slope and the gas constant (R) to calculate the activation energy (Ea) using the equation: Ea = -slope x R. 1. Rearrange the Arrhenius equation to isolate Ea: ln(k) = ln(A) - (Ea / RT), (2). Determine the rate constants (k) at two different temperatures (T1 and T2) from experimental data.
3. Substitute the known values of k, R (gas constant), and T into the equation for each temperature: ln(k1) = ln(A) - (Ea / R * T1), ln(k2) = ln(A) - (Ea / R * T2), 4. Subtract the first equation from the second to eliminate A: ln(k2 / k1) = Ea / R * (1/T1 - 1/T2) 5. Rearrange the equation to solve for Ea: Ea = R * ln(k2 / k1) / (1/T1 - 1/T2) 6. Calculate the activation energy (Ea) by plugging in the known values of k1, k2, T1, T2, and R into the final equation.
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describe the phase and temperature chacges that will occur if you heat 50.0 g of h2o in its solid state at -8 C until it all vaporizes
Answers
The phase and temperature changes that will occur if you heat 50.0 g of H2O in its solid state at -8 C until it all vaporizes is that the solid H2O will transition to a liquid state at 0 C and then to a vapor at 100 C.
What is vapor?Vapor is an aerosolized suspension of tiny liquid particles that are released into the air. It is made up of a mixture of water and other chemicals, such as nicotine, propylene glycol, and other flavorings. Vapor is produced when heated liquid, such as e-liquid, is turned into a vapor. This vapor can be inhaled and exhaled in a manner similar to smoking a traditional cigarette, which is why vapor has become an alternative to traditional smoking.
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Is salt and water a solution? Give a reason for your answer.
Answers
Answer:
yes
Explanation:
as the salt is a polar compound which means that its dissolvable in water
so the salt would be solute and the water is the solvent
what is the result of cell division that includes mitosis?
A. new cells with different chromosomes
B. four cells with new chromosomes
C. two identical new cells
D. one genetically different cell
Answers
Answer:
I think C is the answer
Explanation:
because Mitosis results in two identical daughter cells......
how could you/what would you use to try to turn coffee back into water using items you can find at home?
Answers
Answer:
If you want to filter out the grains then certainly you could using normal filter papers in a filter funnel and repeat until the solution is clear of bits. You could also use a sintered glass filter. However, there will still be compounds from the coffee dissolved in the water and so a molecular sieve could be used and/or a chromatography column to separate these from the water. (You could try reverse osmosis if you really want to try an extreme method and have heaps of lab equipment and time). In practice it is probably easier just to distill the water off in the usual chemical lab way. Of course you could drink the coffee and inevitably separate out the water!
PLEASE PLEASE HELP
What is the pOH of a solution with an OH- ion concentration of
6.0E-4?
Answers
Answer:
3.22
Explanation:
The pOH is defined as:
pOH = - log [OH⁻]
From the problem, we have [OH⁻] = 6.0 x 10⁻⁴.
Thus, we introduce the concentration in the equation to calculate the pOH:
pOH = - log [OH⁻] = -log (6.0 x 10⁻⁴) = 3.22
What phase is carbon dioxide in at 5 atm pressure and –20°C? (1 point)
Answers
Answer:
When a solid turns directly to a gas this is called sublimation. From the graph it can be seen if the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.
Explanation:
WILL GIVE BRAINLIEST AND 20 POINTS How many grams are in 2.36 L of neon gas
Answers
Answer:
2.088464 grams.
Explanation:
The density of neon is 0.9002 g/L. Multiplying this value by the number of liters gives how many grams of neon it contains.
0.9002(2.32) = 2.088464
what are the factors affecting gravity?
Answers
Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:
Mass: The most significant factor affecting gravity is the mass of the objects involved. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses. Greater mass leads to a stronger gravitational force.Distance: The distance between two objects also plays a crucial role in the strength of gravity. According to the inverse square law, the gravitational force decreases as the distance between objects increases. As objects move farther apart, the gravitational attraction between them weakens.Gravitational Constant: The gravitational constant, denoted by G, is a fundamental constant in physics that determines the strength of the gravitational force. It is a universal constant and does not change, affecting the overall magnitude of gravity.Shape and Distribution of Mass: The distribution of mass within an object can influence the gravitational field it generates. Objects with a more compact and concentrated mass distribution will have a stronger gravitational pull compared to those with a more spread-out mass distribution.External Influences: Gravity can be influenced by external factors such as nearby celestial bodies or the presence of other forces. For example, the gravitational interaction between the Earth and the Moon affects tides on Earth's surface.3 hazards that occur in teaching and learning of science
Answers
How should you remove a beaker from a hot plate after heating it?.
Answers
Answer:
Explanation:
you will have to grabe a towle or a meten and take it off
in what organelle does photosynthesis occur
Answers
Answer:
chloroplasts
Explanation:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
A student looks up the molar masses and finds the values 2 g (for H,) and 32 g (for 0,). 1. Give an interpretation of these two numbers. (Note: A formula is not considered an interpretation. ) 2. Compare the masses of the gas samples in the two containers. Explain. Hydrogen Oxygen
Answers
The interpretation of the molar masses of hydrogen (H) and oxygen (O) is that they represent the average mass of one mole of each element.
In other words, if you have 6.022 x 10^23 atoms or molecules of hydrogen or oxygen, their combined mass would be equal to the molar mass. Comparing the masses of the gas samples in the two containers, we can consider the molar masses. The molar mass of hydrogen (H) is 2 g/mol, while the molar mass of oxygen (O) is 32 g/mol. Since the molar mass of oxygen is larger than that of hydrogen, for the same number of moles of each gas, the mass of the oxygen gas sample would be greater than the mass of the hydrogen gas sample. This means that a given volume of oxygen gas would be heavier than the same volume of hydrogen gas, assuming equal temperature and pressure.
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What volume, in dL, of a 0.421 M Li₃PO₄ solution contains 86.4 g of Li₃PO₄?
Answer ASAP Please it is due TODAY!!!!!!!
Answers
Answer:
volume= 1.77dL
first you'll find the moles using
Moles= Mass/Molar mass
After that you'll find the volume using
Molarity= Moles/Volume
