Answer:
B. 88%
Explanation:
percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.
110/125 = 0.88
0.88 x 100 = 88%
In chemistry, the term yield also known as the reaction yield represents the measure of the quantity of the moles of a product formed in the reaction to the reactant used. The correct option is B.
What is percent yield?The amount of the product actually made compared with the maximum calculated yield is defined as the percent yield. It can also be known as the ratio of the actual yield to the theoretical yield.
The ideal quantity of the product is called the theoretical yield and it is obtained by working a stoichiometry problem. The actual amount of the product formed gives us the actual yield.
The equation of the percent yield is given as:
%yield = Actual yield / Theoretical yield × 100
110 / 125 × 100 = 0.88 × 100 = 88%
Therefore the percent yield of the reaction is 88%.
Thus the correct option is B.
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Which of these is NOT a way to express probability?
A .1 in 4
B. 50 percent
c. 3/4
D. 25
Answer:
Option A.
Explanation:
Probability is expressed in percent, fraction or in whole numbers
The only one that does not express a probability is 25.
A one in four chance, a fifty percent chance, a three in four chance. These all could be probabilities.
25 doesn't express a probability.
If this is incorrect, please, don't refrain to tell me.
where are chemicals found?
A.) only in liquids
B.) only in air
C.) in solids,liquids, and gases
D.) only in powders
Answer: c
Explanation: pretty sure its c :]
Which radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time?
Pu-239
FR-229
Fe-53
P-32
Answer:pu-239
Explanation:
Pu-239 is regarded as the radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time
Disposal of radioactive nuclear waste is often regarded as a problem.
The waste sources are:
Nuclear power reactors Bomb-related nuclear materialDisposal of bomb-grade plutonium is often difficult.
The longer lived isotopes are:
Plutonium-239 whose t1/2 is 24,110 years, Plutonium-240 whose t1/2 is 6,540 years, Curium-245 whose t1/2 is 8,500 years. etc.The storage of the longer lived elements is through containment for the next several thousand of years.
The control or management of radioactive waste is a hard, multifaceted procedure.
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A hydrochloric acid solution contains 36 percent HCl by mass. Calculate its
molality
kinetic energy is the energy of ____ things
Answer:
moving things
Explanation:
kinetic energy is the energy of moving things
The sample of oxygen which represents the greatest mass is
A.) mole
B.) gram
C.) molecule
D.) liter
Answer:
A
Explanation:
A sorry if not correct
A low ph scale would indicate that the water is A. Neutral B. Basic C. Acidic
A leader from Louisiana is claiming that it is necessary to include the effects of tornadoes in his city’s emergency plan for natural disasters. Use data from Map 1, the graphs, and what you know about tornadoes to support his claim.
please answer this now i will give brainliest to first person who got it correct.
and don't answer it if you just gonna write stuff that weren't don't even make since to get the point.
Answer:
i dont know either im sorry
Explanation:
Answer:
Where are the graphs?
Explanation:
Consider the equation for the formation of a kidney stone.
2Na3 PO4 (aq) + 3CaCl2 (aq) =
Ca3(PO4)2 (s) + 6NaCl (aq)
Is each reactant bonded ionically or covalently?
How do you know?
Answer:
Ionically, because they are ionic compounds
can someone help me with this plz??
Answer:
I dont know at all and that is confusing.
A. The potential energy of the products is greater than the potential energy of the reactants
B. The potential energy at point A represents the activation energy
C.The potential energy of the products is lower than the potential energy of the reactants
D. The potential energy at point C represents the activation energy
Answer: im pretty sure it is b but a is also good i going to be honest it a multi chose and i ant good at those
Explanation:
Give an example of a decomposer, and explain what would happen if decomposers were absent from a forest ecosystem. Provide evidence to support your claim and explain your reasoning
Answer: Bacteria, some insects, and fungal species are the decomposers of the dead and decaying matter.
Explanation:
The decomposers are the organisms which act and feed on the dead and decaying organic matter so as to obtain energy from it and degrade it to the simple forms that can be utilized by the plants. Bacteria, some insects and fungi that live in the soil and on the decaying matter. The fungi for example decay on the lignin present in the wood so helps in wood decomposition of trees. If the decomposer like fungi are absent the wood mass will not decompose and it will remain as waste and can be used by the plants in the form of nutrients.
Which is a general property of cell membranes? a) Membranes contain more lipid than protein. b) Membrane proteins have a polar head and a non-polar tail. c) Membrane lipids are amphipathic. d) Membranes contain covalent bonds between fatty acids
Answer:
c) Membrane lipids are amphipathic.
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life.
In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles found in all living organisms such as trees, birds, and bacteria include; nucleus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, cytoskeleton, vesicles, golgi apparatus, and cell membrane.
Cell membrane is the wall of a cell and typically controls what leaves and enters the cell.
A general property of cell membranes is that membrane lipids are amphipathic. All the lipid molecules found in the cell membrane are amphipathic or amphiphilic, which means that they are "water loving" (hydrophilic) with a polar end or "water fearing" (hydrophobic) with non-polar end. Thus, membrane lipids have an end that's soluble in water (polar) while the other end is soluble in fat (non-polar).
The membrane lipids are amphipathic.
• In the majority of cell membranes in animals, lipids, that is, fatty molecules forms about 50 percent of the mass of the cell.
• All the molecules of lipid in a cell membrane are amphipathic, that is, they possess a polar end or hydrophilic and non-polar end or hydrophobic end.
• The phospholipids are the most abundant lipids found in the cell membrane.
• They have a polar head group and two hydrophobic hydrocarbon tails.
• It is the amphipathic nature and shape of the molecules of lipids, which makes them to produce bilayers spontaneously.
Thus, correct answer is option c, that is, membrane lipids are amphipathic.
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A bee buzzes inside a flower to drink some nectar. While there it touches the stamen. Later the bee goes to another flower and comes into contact with the flower's pistil. Which process of reproduction is this helping with?
QUESTION
A bee buzzes inside a flower to drink some nectar. While there it touches the stamen. Later the bee goes to another flower and comes into contact with the flower's pistil. Which process of reproduction is this helping with?
ANSWER
The bee is helping in pollination which is an important event in case of sexual reproduction in flowering plants.
Pollination is a part of pre-fertilisation ( gamete transfer ).
Pollination by insects ( most commonly bees ) is known as Entamophily
What is the best way to statically charge an object,
Answer:Static electricity can be created by rubbing one object against another object.
Explanation: This is because the rubbing releases negative charges, called electrons, which can build up on one object to produce a static charge
does all Newton's laws work together
1. Which of the following elements have atoms with a full shell of
valence electrons (1 point)
a. Lithium
b. Oxygen
c. Hydrogen
d. Neon
Answer:
The answer is neon.
Explanation:
Hope this helped Mark BRAINLEST!!!
NaBr
what is the name for ionic compounds
Answer:
Its name is Sodium Bromide .
Answer:
=>. the chemical Name of NaBr
=>. sodium bromide
hope it helps
Which of your recipes was the best?
Trial 1
Trial 2
Trial 3
Why is this your best recipe? What criteria did you meet?
Answer:
trial 1
Explanation:
trust
Which statement is true about energy? A. Energy never moves. B. Energy is never destroyed. C. Energy always changes to heat. D. Energy always changes to light.
Answer: energy is never moves
Explanation:
Which daily task involves a mix of simple and complex technology?
In which ways are evaporation and condensation similar?
Both cause decrease in air temperature
Both cause increase in air temperature
Both are caused by the warming of the atmosphere
Both are caused by changes in heat energy
Answer:
Both are caused by changes in heat energy
Explanation:
When air gets hotter water will evaporate, when air gets cooler water will condensate.
0.074 liters of a 15 M solution need to be diluted so that the new
concentration is 3.40 molar. What should the new volume of the solution
be?
A) 0.17 liters
B) 0.33 liters
C) 2.3 liters
D) 3.2 liters
Answer:
3.2
Explanation:
i caculated give me a 1 star if incorrect
i have extra points so giving points out to people who can answer these questions
HAS TO BE CORRECT
doing addison next
ill ask in comments who wants brainliest <3
1. what is charli d'amelio's favorite food
2.what is charli d'amelio's favorite color
3. how long has charli d'amelio been dancing for??
99 points
heres a rare from charli luvs
Answer:
Dunkin' Donuts
Purple
Charli began dancing at age 3, and was a trained competitive dancer for over 10 years prior to starting TikTok.
Explanation:
Answer:
pink
Explanation:
how many moles are in 3.01 x 10^22
Answer:
The answer is "5 moles".
Explanation:
Please find the complete question in the attached file.
[tex]\to 3.01 \times (10^{22}) = 0.0499822251 \approx 0.05 \ moles[/tex]
What is the difference between a physical and chemical change? (Use words reactants, products, atoms and molecules.)
Answer:
A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products.
Calculate the molecular weight of 0.2g H3X solution if 50ml of this acid neutralized with 40ml of 0.03N Ca(oH)2 then calculate strength of this solution in ppm
Answer:
1. Molecular weight = 333.3 g/mol
2. Strenght = 2222.2 mg/L
Explanation:
First, we need to find molarity (M) from normality (N) as follows:
[tex] N = nM [/tex]
Where n is the number of OH⁻ = 2
[tex] M = \frac{N}{2} = \frac{0.03}{2} = 0.015 mol/L [/tex]
Now, when the H₃X solution is neutralized with Ca(OH)₂ we have:
[tex]\eta_{H_{3}X} = \eta_{Ca(OH)_{2}} = M_{Ca(OH)_{2}}*V_{Ca(OH)_{2}} = 0.015*0.04 = 6 \cdot 10^{-4} moles[/tex]
Hence, the molecular weight (MW) of H₃X is:
[tex] MW = \frac{m_{H_{3}X}}{\eta_{H_{3}X}} = \frac{0.2 g}{6 \cdot 10^{-4} moles} = 333.3 g/mol [/tex]
Finally, we can calculate the strength (S) of this solution in ppm as follows:
[tex] S = \frac{m}{V} = \frac{200 mg}{0.050 L + 0.040 L} = 2222.2 mg/L [/tex]
I hope it helps you!
Marcus wants to use two objects to compare the sizes of a proton and an electron. If he uses a basketball for a proton, which object would best represent an electron?
A
a pea
B
a bowling ball
C
a soccer ball
D
a beach ball
Answer:
A
Explanation:
does carbon dissolve in water
Answer:
yes
Explanation:
CO2 is soluble because water molecules are attracted to these polar areas. The bond between carbon
Can someone please help I don’t now which one to put
Answer:
2nd or 3rd dyfudhfkfhxhxhxjxjcjcifid