Please help!
magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial.
trial 1:
trial 2:
data
mass of empty crucible with lid
trial 1: 26.688
trial 2: 26.681
mass of mg metal, crucible, and lid
trial 1: 26.994
trial:2 26.985
mass of mgo, crucible, and lid
trial 1: 27.188
trial 2: 27.180
Answers
The theoretical yield of MgO for trial 1 is 508 mg and for trial 2 is 504 mg.
What does the term "theoretical yield" mean?The maximum amount of product that could be produced from the specified reactant amounts is known as the theoretical yield. The amount of product that actually forms during the reaction in a lab setting is known as the actual yield.
Given:
mass of Mg used in trial 1 = 26.994 g - 26.688 g = 0.306 g
mass of Mg used in trial 2 = 26.985 g - 26.681 g = 0.304 g
Mg + O2 → MgO
1 mole of Mg reacts with 1 mole of O2 to produce 1 mole of MgO.
The molar mass of Mg is 24.31 g/mol and the molar mass of MgO is 40.31 g/mol.
Using the mass of Mg, we can calculate the number of moles of Mg:
moles of Mg in trial 1 = 0.306 g / 24.31 g/mol
= 0.0126 mol
moles of Mg in trial 2 = 0.304 g / 24.31 g/mol
= 0.0125 mol
Now we can use its mole quantity to determine the theoretical yield of MgO:
theoretical yield of MgO in trial 1 = 0.0126 mol x 40.31 g/mol
= 0.508 g or 508 mg
theoretical yield of MgO in trial 2 = 0.0125 mol x 40.31 g/mol
= 0.504 g or 504 mg
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Related Questions
Draw the structures of the following and write out their names :
i. CH2 = C(CH3)CH=C(Cl) - CH3
ii.CH3 CH2 C(CH3) Cl CH(CH3) C(Br)2 CH3
Answers
Answer:
i. CH2 = C(CH3)CH=C(Cl) - CH3
4-methyl pent-2,4-diene-2-chloro
Explanation:
ii.CH3 CH2 C(CH3) Cl CH(CH3) C(Br)2 CH3
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How are prepare Tolu Balsam syrup by percolation?
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Tolu Balsam syrup prepared by percolation is commonly used as an expectorant and cough syrup.
Tolu Balsam syrup can be prepared by percolation as follows:
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chemical reactions amplify 1.1 pre assessment
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Chemical reactions are the various types of permanent changes which occur in substances and which produce new substances .
What are chemical reactions?Chemical reactions are changes which occur in the arrangement of atoms in a substance resulting in the formation of new substances.
There are many types of chemical reactions such as:
combination reactionsdisplacement reactionsdecomposition reactionsoxidation reactionsdouble displacement reactionsThe various types of chemical reactions that occur contribute to the numerous compounds and substance in existence today.
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What are three concepts that you may explore while learning in a physical science course?
Answers
What is the un-balanced equation for this
reaction?
Mg +0 --> Mgo
Mg + 02
--> Mg02
Mg + 02 --> Mgo
Answers
Answer:
2Mg + O2 → 2MgO
Explanation:
Scientists from different fields are trying to understand how the global climate is reacting to the changes caused in nature, and by human activities. They have come up with conflicting interpretations. Which of these is the most likely outcome of differences in interpretations made by scientists on the issue of global climate?
Answers
Answer:
New ideas would be created and tested
Explanation:
All old ideas would be discarded.
Scientific evidence would be weakened.
New ideas would be created and tested.
The limitations of science would be evident.
In science, old ideas are usually improved or modified and not entirely discarded. The old ideas form the basis for new ideas after extensive reviews. Differences in the interpretations made by scientists on any particular phenomenon give rooms for reviews. The reviews often generate new ideas or hypotheses and these can be tested using relevant experimental procedures according to the scientific method.
Hence, the correct answer would be that new ideas would be created and tested.
PLEASE HELP ASAP
magnesium has a density of 1.74 g/cm3. if you have a sphere of solid magnesium that has a volume of 290 cm 3 what is its mass in grams
Answers
The mass of magnesium, which has a density of 1.74 g/cm is 504.6 g.
What is mass?Mass is the quantity of matter. Mass can be calculated by multiplying density by volume.
Magnesium is a chemical element with the atomic number 12. It is needed in the body in trace amounts. It can cause malnutrition in the body.
Mass = Density x volume
We know the density and the volume of magnesium.
Density = 1.74
Volume = 290
Density x volume
Putting the value in the equation
1.74 x 290 = 504.6 g
Thus, the mass of magnesium is 504.6 g.
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describe the basic assumptions of the kinetic molecular theory of gases that confirm the ideal behavior of gases.
Answers
The kinetic-molecular principle of gases assumes that perfect gasoline molecules are constantly moving.
have negligible quantity;have negligible intermolecular forces undergo flawlessly elastic collisions have a median kinetic strength proportional to the suitable fuel's absolute temperature.The gasoline debris has a negligible extent. The gas debris is similarly sized and no longer has intermolecular forces (enchantment or repulsion) with other fuel particles. The gasoline debris flows randomly in settlement with Newton's legal guidelines of motion. The gasoline debris has perfect elastic collisions without energy loss.
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Mention the reason why aquatic plants have air filled tissues.
Answers
Answer:
Aquatic plants have aur filled tissues to make them easy to float.....
Explanation:
It provides buoyancy
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Answers
When the partial pressure of carbon dioxide (pCO2) in the plasma increases, this leads to a decrease in plasma pH, resulting in a more acidic environment. The relationship between pCO2 and pH is described by the Henderson-Hasselbalch equation, which helps predict the acid-base balance in the body.
An increase in pCO2 levels indicates that more CO2 is being produced or less is being eliminated. As CO2 dissolves in the plasma, it forms carbonic acid (H2CO3), which subsequently dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-). The increase in H+ ions is what causes the decrease in pH, signifying a more acidic environment.
This change in pH can disrupt the body's normal homeostasis and is commonly referred to as respiratory acidosis. The body's response to this imbalance involves various buffering systems, such as the bicarbonate buffer system, to help restore pH to a normal range.
In conclusion, an increase in plasma pCO2 levels leads to a decrease in plasma pH, creating a more acidic environment. This can disrupt the body's normal functioning and prompt compensatory mechanisms to restore the acid-base balance.
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draw the structure for trans−1−benzyl−3−phenylcyclopentane.
Answers
Trans-1-benzyl-3-phenylcyclopentane is the IUPAC name for the given compound. It is a cyclic hydrocarbon containing a cyclopentane ring that is substituted with benzyl and phenyl groups. The trans isomer of this compound has the benzyl and phenyl groups on opposite sides of the cyclopentane ring.
The structural formula of trans-1-benzyl-3-phenylcyclopentane is as follows:
It can be seen from the structural formula that the benzyl group is attached to the first carbon atom of the cyclopentane ring, whereas the phenyl group is attached to the third carbon atom of the ring. The trans-configuration is indicated by the double bond between the second and third carbon atoms of the cyclopentane ring.
The structural formula can be further simplified as follows:
The structural formula shows that trans-1-benzyl-3-phenylcyclopentane contains a total of 15 carbon atoms and 14 hydrogen atoms.
The structural formula can be used to predict the physical and chemical properties of trans-1-benzyl-3-phenylcyclopentane, such as its melting and boiling points, solubility, reactivity, and so on.
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how many moles of no₂ would be produced from 4.5 mol of o₂ in the reaction below assuming the reaction has a 57.0% yield? 2 no (g) o₂ (g) → 2 no₂ (g)
Answers
5.13 moles of NO₂ is produced from 4.5 moles of O₂, assuming the reaction has a 57% yield.
Given reaction:
2NO (g) + O₂ (g) → 2NO₂(g)
2mole 1 mole 2mole
Here,
1 mole of O₂ produces= 2 moles of NO₂
Therefore,
4.5 moles of O₂ will produce
= 2 × 4.5 moles
= 9 moles of NO₂
For 100 % yield, 9 moles of NO₂ is produced from 4.5 moles of O₂
Assuming the reaction has a 57% yield, number of moles of NO₂ produced is calculated as:
% yield= \(\frac{ actual yield}{ theoretical yield}\) × 100%
57 = \(\frac{actual yield}{ 9 mole}\) × 100%
actual yield = 9 moles × 57 /100
actual yield= 5.13 moles
Thus, 5.13 moles of NO₂ is produced from 4.5 moles of O₂
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Weathering and Erosion Unit Test
Explain how crustal deformation builds landforms.
O
When two tectonic plates start to push into each other they can rise up and build mountains, or sink under
and create deep valleys.
O When wind and rain slowly wear away rock, they leave behind new looking landforms.
If
o
When two tectonic plates slide away from each other the inner liquid layer of the mantle comes to the
surface as lava and creates new islands.
It
When sediments are laid down over vast areas the forces involved create rock over a very long period of
time.
It
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Crustal deformation builds landforms when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create valleys.
How crustal deformation builds landforms?Tectonic pressure in a crust can cause folding. Folding can end up with the formation of valleys and mountains so we can conclude that when two tectonic plates start to push into each other they can rise up and build mountains, or when they sink under, they create deep valleys.
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In the beta oxidation pathway, which of these is produced when ATP is consumed? Assume the starting saturated fatty acid contains n carbons and n is an even number. CH₃(CH₂) ₙ₋ ₄COCH₂CO-COA CH₃(CH₂) ₙ₋ ₄HCOHCH₂CO-COA CH₃(CH₂) ₙ₋ ₄CO-COA CH₃(CH2) ₙ₋₂CO-COA CH₃(CH₂)ₙ₋ ₄HC=CHCO-COA OCH₃CO-COA
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In the beta oxidation pathway, which of these is produced when ATP is consumed is CH₃(CH₂)n-₄COCH₂CO-COA
Option A is correct .
How much ATP does beta-oxidation use up?Each round of mitochondrial beta-oxidation produces one acetyl CoA molecule, one FAD(2H) molecule, one NADH molecule, and four ATP equivalents. Specific enzymes are required for the metabolism of fatty acids during beta oxidation.
Which type of fatty acid, saturated or unsaturated, produces more ATP?Due to their higher H+ concentration, saturated fats do indeed contain more gross energy. Nonetheless, unsaturated fats are more edible and have higher ingestion rate, and in this manner the metabolizable energy that unsaturated fats give is higher than that given by soaked fats.
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Write the similarity and difference between the structure of nylon and the protein
Answers
The similarity between the structure of nylon and protein is that both are polymers composed of repeating units. However, there are also significant differences in their structures.
Similarity: Both nylon and protein are polymers. This means that they are large molecules made up of smaller repeating units called monomers. In the case of nylon, the monomers are amide groups, while in proteins, the monomers are amino acids. This similarity in the basic structure allows both nylon and proteins to have long chains of repeating units.
Difference: The main difference between the structure of nylon and protein lies in the nature of their monomers. Nylon is a synthetic polymer, meaning it is artificially produced, while proteins are natural polymers found in living organisms. Nylon is made by combining two different monomers through a chemical reaction, whereas proteins are synthesized through biological processes in cells.
Another difference is the complexity of their structures. Proteins are highly complex and have a specific sequence of amino acids, which determines their unique properties and functions. In contrast, nylon is a simpler polymer with a more regular repeating pattern.
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for a molecule to exhibit hydrogen bonding the h must be covalently bonded to a?
Answers
Answer:
: fluorine, oxygen, or nitrogen.
Explanation:
Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen.
Hydrogen bonding occurs only in molecules where hydrogen is covalently bonded to one of three elements: fluorine, oxygen, or nitrogen. These three elements are so electronegative that they withdraw the majority of the electron density in the covalent bond with hydrogen, leaving the H atom very electron-deficient. The H atom nearly acts as a bare proton, leaving it very attracted to lone pair electrons on a nearby atom.
predict the formula for a compound made from x2 and y–.
Answers
The formula for a compound made from x2 and y- can be predicted using the crisscross method.
X2 has a charge of 2+ while y- has a charge of 1-. To form a neutral compound, the charges must balance each other.
To do this, the charge of x2 will become the subscript of y, and the charge of y- will become the subscript of x2.
Thus, the formula for the compound will be written as X2Y.
This indicates that two atoms of x combine with one atom of y to form the compound.
The compound may have different properties and characteristics depending on the identity of the elements X and Y.
Overall, the crisscross method is an effective way to predict the formula of an ionic compound.
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Write a essay on endangered animals
A: Inquiring and analysing
i. explain and justify the need for a solution to a problem
ii. state and prioritize the main points of research needed to develop a solution to the problem
iii. describe the main features of an existing product that inspires a solution to the problem
iv. present the main findings of relevant research
B: Developing ideas
i. develop a list of success criteria for the solution
ii. present feasible design ideas, which can be correctly interpreted by others
iii. present the chosen design
C: Creating the solution
i. outline a plan, which considers the use of resources and time, sufficient for peers to be able to follow to create the solution
ii. demonstrate excellent technical skills when making the solution
iii. follow the plan to create the solution, which functions as intended
iv. list the changes made to the chosen design and plan when making the solution
D: Evaluating
i. outline simple, relevant testing methods, which generate data, to measure the success of the solution
ii. outline the success of the solution against the design specification
iii. outline how the solution could be improved
iv. outline the impact of the solution on the client/target audience
I WILL IDMEADIITLY MARK U AS BRAINLIESTTT
Answers
Answer:
WHATS OOP Lucy???
HELP!!!!!!! THIS NEEDS TO BE DONE BY TODAY!!!!
Answers
Answer:I think it is A or C
Explanation:
Which of these is NOT required to ensure that stock solutions are free of contamination?
a. store all solutions in brown bottles
b. do not place dropping pipettes in stock solution bottles
c. never return excess chemicals to stock bottles
d. Replace tops on reagent bottles after use
Answers
Option A "store all solutions in brown bottles" is NOT required to ensure that stock solutions are free of contamination.
A stock solution is a high concentration solution that is created to be diluted for a variety of laboratory activities. For example, if an experimenter wants to prepare 1 L of 0.1 mol/L hydrochloric acid (HCl), they will prepare 83.33 mL of concentrated HCl (12 mol/L) and then add it to 916.67 mL of water to make up the final volume.Steps to ensure stock solutions are free of contamination:One should always use the following steps to ensure that stock solutions are free of contamination:Never return excess chemicals to stock bottles.Do not place dropping pipettes in stock solution bottles.Only replace tops on reagent bottles after use.Store solutions in a cool, dry place. Avoid sunlight. Store all solutions in brown bottles.Keep all solutions labelled to avoid mixing them up.Examine your glassware for cleanliness before using it.Pipette liquids with care.
Avoid spilling on the ground. Avoid placing pipette tips on the table.Never use pipette tips or glassware that have been used to mix or carry other substances.Never attempt to taste or smell any chemicals or solutions.Wear protective gloves and lab coats when dealing with dangerous substances.
Stock solutions should always be checked for contamination before they are used. If contamination is suspected, the solution should be discarded.
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140000 rounded to 3 sig gigs
Answers
I believe this is right
Answer:
Please write your completely question.
The equation below shows the decomposition of lead nitrate. How many molecules of PbO are produced when 11.5 g NO2 is formed?
2Pb(NO3 )2 (s) → 2PbO(s) + 4NO2 (g) + O2 (g)
Answers
Best explanation and example will be mark BRAINLIEST.
State the octet rule.
Answers
Answer:
62,000,000 written in scientific notation is 6.2 × 107.
Explanation:
The reaction of an alkene and water in the presence of an acid catalyst to produce an alcohol is called ________.
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[cu2 ] concentration in a copper-silver electrochemical cell is 0.1m at 25 oc. if the total cell potential is 0.422v, what is the [ag ] concentration?
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Choose the mathematical sentence that most accurately expresses the
information in the problem, and would be most helpful in solving it.
After taking 4 pieces of fruit out of a bag, 12 pieces of fruit remained. How
many pieces of fruit were in the bag to start?
A. 12 +/-4
B. 12 -4
C. 4+/- 12
D. 12-4-f
OE. +4=12
F. /-4-12
T or F: The mass of an answer is so small it is rounded to 0 amu
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List the following types of electromagnetic radiation in order of increasing wavelength. Rank the following types of electromagnetic radiation from lowest to highest wavelength. To rank items as equivalent, overlap them. radio waves, microwaves, infrared radiation, ultraviolet radiation
Answers
Electromagnetic radiation can be classified into different types based on their wavelengths. The types of electromagnetic radiation you've mentioned can be ordered from the lowest to the highest wavelength as follows:
1. Ultraviolet radiation
2. Infrared radiation
3. Microwaves
4. Radio waves
Ultraviolet radiation has the shortest wavelength among these types, ranging from approximately 10 to 400 nanometers (nm). It is responsible for skin tanning and can be harmful if the exposure is excessive, potentially causing sunburn or even skin cancer.
Next in the order is infrared radiation, with wavelengths ranging from about 700 nm to 1 millimeter (mm). Infrared radiation is emitted by warm objects, and it plays a significant role in heat transfer and remote sensing technologies.
Microwaves have a broader wavelength range than infrared radiation, from approximately 1 mm to 100 centimeters (cm). They are commonly used in various communication systems, as well as in heating food in microwave ovens.
Finally, radio waves have the longest wavelength in this list, ranging from around 1 cm to 100 kilometers (km). They are widely used for communication purposes, such as in television and radio broadcasting, mobile phones, and satellite communication.
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Because of heredity, members of the same species do not have the same traits.
True or false
Answers
Answer:
false
Explanation:
use the rapid quark for a explain
Câu 1: Trình bày phương pháp hóa học nhận biết
a. 3 dung dịch: HCl , Na2SO4 , NaCl.
b. 3 dung dịch:NaOH , NA2CO3 , NaCl.
c. 4 dung dịch:HCl , H2SO4 , NaCl , Na2SO4.
Viết phương trình phản ứng xảy ra (nếu có)
Answers
Answer:
c
Explanation:
beacause Câu 1: Trình bày phương pháp hóa học nhận biết