Answer:
m
Explanation:
Answer:
CN is your answer.
Explanation:
Hope this helps!!!
A sample of PH3, occupying 1.50 L at 25 oC and 0.80 atm, reacts with 0.080 atm, reacts with 2.28L of O2 at 20.0 oC and 0.100 atm according to the following equation:
4 PH3(g) + 8 O2(g) => P4O10(s) + 6 H2O(g)
How many grams of each product is produced? How many grams of each reactant are left at the end of the reaction? What is the final pressure at the end of the reaction? (The final volume is 3.88L and the final temperature is 22.5C).
The ideal gas equation can be used to obtain the pressure, number of moles, volume and temperature of a gas.
What is the ideal gas equation?The ideal gas equation gives the relationship between pressure, number of moles, volume and temperature.
To obtain the number of moles of PH3
PV = nRT
n = PV/RT
n = 0.80 atm * 1.50 L/0.082 atmL/Kmol * 298 K
n = 0.049 moles
Number of moles of O2
PV = nRT
n = PV/RT
n = 0.100 atm * 2.28L /0.082 atmL/Kmol * 293 K
n = 0.0095 moles
Fom the reaction equation;
4 moles of PH3 reacts with 8 moles of O2
0.049 moles of PH3 reacts with 0.049 moles * 8/4 moles
= 0.098
Hence O2 is the limiting reacatant.
Mass of P4O10 produced =
8 moles of O2 yields 1 mole of P4O10
0.0095 moles of O2 yields 0.0095 moles * 1 mole/8 moles
= 0.0012 moles
Mass of P4O10 = 0.0012 moles * 284 = 0.34 g
Mass of water;
8 moles of O2 yields 6mole of water
0.0095 moles of O2 yields 0.0095 moles * 6 moles/8 moles
=0.0071 moles
Mass of water = 0.0071 moles * 18 g/mol = 0.13 g
Since 4 moles of PH3 reacts with 8 moles of O2
x moles of PH3 reacts with 0.0095 moles of O2
x = 0.0048 moles
Moles of PH3 left over = 0.049 moles - 0.0048 moles = 0.0442 moles
Mass of PH3 left over = 0.0442 moles * 34 g/mol
= 1.5 g
No mass of O2 is left over because the limiting reactant is used up.
Total moles of gas left after the reaction = 0.0442 moles + 0.0071 moles = 0.0513 moles
P = nRT/V
P = 0.0513 moles * 0.082 atmL/Kmol * 295.5/3.88L
P= 0.32 atm'
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Determine whether aqueous solutions of the following salts are acidic, basic, or neutral: (a) Al(NO3)3 (b) RbI (c) KHCO2 (d) CH3NH3Br
The aqueous solution and their respective properties include the following:
Al(NO3)3 - acidicRbI - neutralKHCO2 - basic CH3NH3Br - acidicWhat is pH?This is defined as the degree of acidity or alkalinity of a substance and pH from 1.0 - 6.9 is acidic, 7 is neutral while 7.1 - 14.0 is basic.
The aqueous solutions and their appropriate pH can be seen above which is the right choice.
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two or more substances combine to form a single new substance
Answer:
Combination reactions
Explanation:
Hope this helps:)
There are two varieties in a population of squirrels: short tails and long tails. Long-tailed squirrels are better at jumping and balancing in trees. Scientists observe that over the span of 100 years, the proportion of the population with long tails increases from 10% to 60%. Which statement is most likely? (1 point)
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of short-tailed squirrels may have decreased due to decreased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The statement has it that the percentage of long tailed increased also that the long tailed are better at jumping and balancing on trees.
The first option could is tempting but saying decrease in trees would not likely support the argument.
The last option has more sound options as more food availability may lead to population increment
Hope it helps....
Criteria and constraints help determine which solutions will be applied when extracting materials from pomace in which way
might a specific criterion be applied to this situation? (1 point)
The use of pomace for pharmaceuticals might be chosen if a food company does not have access to a
production plant for extracting chemicals
The use of pomace for pharmaceuticals might be chosen if minimizing production costs is desired
a
The use of pomace for animal feed might be chosen if a food company does not have access to a
production plant for extracting chemicals
The use of pomace for animal feed might be chosen if minimizing production costs is desired.
Answer:
The use of pomace for animal feed might be chosen if minimizing production costs is desired
Explanation:
i've taken the test
The use of pomace for animal feed might be chosen if minimizing production costs is desired. Therefore, the correct option is option D.
What is pomace?The solid byproduct of pressing grapes, olives, or even other fruits for juice or oil is known as pomace or marc. It includes the fruit's skins, pulp, seeds, or stems. Pomace brandy has traditionally been made from grape pomace. Currently, it is primarily used as fertilizer, animal feed, or to extract bioactive substances like polyphenols.
The Latin word "pomum" is where "pommace" comes from. The phrase "pomace" was first used by the English to describe the byproduct of making cider. Pomace wine, which had an alcohol concentration of three to four percent, was very common during the Middle Ages. The use of pomace for animal feed might be chosen if minimizing production costs is desired.
Therefore, the correct option is option D.
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Solid Snake is being chased up the communications tower. Solid Snake is 75 kg and is carrying 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, how much work was done against gravity?
a.
4.04 kJ
b.
109.15 kJ
c.
135.34 kJ
d.
5.01 kJ
Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).
What is work?In physics, work is the energy transferred to or from an object via the application of force along a displacement.
In this problem, the force that does the work is the one that opposes the weight.
Step 1: Calculate the total weight of the system.Solid Snake is 75 kg and is carrying 18 kg of equipment. The total mass is:
m = 75 kg + 18 kg = 93 kg
We can calculate the weight using Newton's second law of motion.
F = m . g = 93 kg . 9.8 m/s² = 911.4 N
Step 2: Calculate the total displacement.Solid Snake climbs 27 flights of stairs, each 5.5 m in height.
27 . 5.5 m = 148.5 m
Step 3: Calculate the work done.We will use the definition of work.
w = F . s = (911.4 N) . (148.5 m) . (1 kJ/1000 J) = 135.34 kJ
Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).
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Calculate the % by mass concentration for each of the following solutions. Match the answers.
1.25g NaCl in 100.0g of solution = [a]%
ce
2.50g K2Cr2O7 in 96.0g of solution = [b]%
nts
10.0g CaCl2 in 250.0g of solution = [c]%
ns
20.0g Kl in 100.Ogof solution = [d]%
The percentage by mass of each of the compounds would be 40%, 2.6%, 4%, and 20% respectively
Percentage by massThe percentage by mass of a substance is given by:
Percent by mass = mass of substance/mass of solution x 100%.
For NaCl: Percent by mass = 25/100 = 40%For K2Cr2O7: Percent by mass = 2.50/96 = 2.6%For CaCl2: Percentage by mass = 10/250 = 4%For KI: Percent by mass = 20/100 = 20%More on percentage by mass can be found here: https://brainly.com/question/27108588
The ________________and ______________ of magma cause igneous rocks to form.
Answer:
The solidifying/cooling and crystallizing of magma causes igneous rocks to form.
What properties of water are related to Oxidation?
Answer:
water has several important physical properties. Most of the physical properties of water are quite atypical e.g molar mass is 18.0151grams per mol and melting point is 0.00 degree
balancing equation plsss help
Answer:
The formula is : C3H8 + 5O2 → 3CO2 + 4H2O.
Explanation:
good luck
What are some other type of chemical reactions? What makes them different?
Ozone has a molecular formula of O3. If 7.92*1024 atoms of oxygen react to form ozone, how many
moles of ozone would be produced?
337.92 moles of Ozone will be produced
1 Oxygen atom is 8 g
1 mole of ozone, O3 = 8 * 3 = 24 g
7.92 * 1024 = 8110.08 g
1 mole = 24 g
? moles = 8110.08 g
? = 337.92 moles
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Ozone has a molecular formula of O3. If 7.92*1024 atoms of oxygen react to form ozone, then 337.92 moles of ozone will produce.
What is molecular formula?Molecular formula is defined as an expression that defines a number of atoms of each element in one molecule of a compound.
It can also be defined as a chemical formula that gives the total number of atoms of each elements in each molecules of a substance.
Ozone is defined as a highly reactive gas composed of three oxygen atoms and form a layer above the earth surface called as ozone layer.
1 oxygen atom = 8 g
1 mole of ozone = 8 x 3 = 24 g
7.92 x 10²⁴ = 8110.08 g
24 g = 1 mole
So, 8110.08 g = 337.92 moles
Thus, Ozone has a molecular formula of O3. If 7.92*1024 atoms of oxygen react to form ozone, then 337.92 moles of ozone will produce.
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Thermal energy transfer lab report.
I need answers for questions 1-11.
If you cannot answer every question, that is ok. I just need the help. Here are the questions.
1. What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
2. What is your hypothesis (or hypotheses) for this experiment?
3. What methods are you using to test this (or each) hypothesis?
4. Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?
5. Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
6. What do the key results indicate?
7. If you constructed graphs, what trends do they indicate in your data?
8. Were there any problems with the experiment or the methods? Did you have any surprising results?
9. What do the results tell you about your hypothesis(es)?
10. How do the data support your claim above?
11. If you could repeat the experiment and make it better, what would you do differently and why?
Thermal energy flows from hot to colder bodies and is determined by the process of calorimetry.
What is thermal energy?Thermal energy is the energy transfer process which occurs as a result temperature difference between two bodies.
Thermal energy flows from hot to colder bodies.
The quantity of Heat transfer is determined using a calorimeter.
The calorimeter works on the principle of conservation of energy. The principle of the calorimeter is stated as follows:
Heat lost = Heat gainedThe quantity of Heat, q = mass × specific heat capacity × temperature difference
Therefore, it can be concluded that thermal energy flows from hot to colder bodies.
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Answer:
I did this earlier, here's what I put.
When heated, KClO3 decomposes into KCl and O2. 2KClO3⟶2KCl+3O2 If this reaction produced 17.4 g KCl, how many grams of O2 were produced? maSS
Answer:
12.6 g O2 or
12.60 g O2 (if needed two decimal places)
Explanation:
First convert grams into moles:
17.4 g KCl × 1
74.55
= 0.233 moles of KCl
Next solve for the mole of O2:
= 0.233 × 3 moles of O2
2 moles of KCl
= 0.3495 or
= 0.350 moles of O2
Finally convert the mole to grams:
= 0.350 moles of O2 × 36g
1 mole
= 12.6 g O2 or 12.60 g O2
Answer:
a car traveled 20m &400k/g
What happens when an electron jumps energy from energy level 3 energy level 6 in an atom
Explanation:
high energy to Low energy
=the electron gains energy (K.E)
What are some uses of radioactive dating?
HELPP PLEASEEEE!!!
Answer:
Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known.
Arrange the following acids from strongest to weakest:
HF, HBr, HCl, HI
Answer:
HI>HBr>HCL>HF
Explanation:
I will give 500 points! What is the composition of Milk?
Answer:In general, the gross composition of cow's milk in the U.S. is 87.7% water, 4.9% lactose (carbohydrate), 3.4% fat, 3.3% protein, and 0.7% minerals (referred to as ash).
Explanation:
i got it ccorerct
Answer:
The milk of goats and sheep is similar in composition to that of cows.
Milk protein consists mainly of casein, and it exists in several classes: α, β, etc. If milk pH falls below 4.6, the casein precipitates. Although casein represents 80–85% of total milk protein, when precipitation occurs, the liquid portion is referred to as whey.
The remaining proteins are found in whey, and they include serum albumin, immunoglobulins, α-lactalbumin, etc. Milk carbohydrate is lactose, and its content is fairly consistent among breeds of milk cows at around 5.0%.
lactose is the main sugar; smaller quantities of glucose and citric acid exist. The fat content varies between ca. 3.5 and 5.0% depending upon cattle breed.
The ash content of around 0.7% consists of a relatively high level of Ca2+ and a lower level of Fe2+.
The pH of fresh whole milk is around 6.6 but it may reach ca. 6.8 from a cow that has mastitis.
Mastitis is an infection of the udder that is most often caused by Streptococcus agalactiae and S. Uberois but sometimes by Staphylococcus aureus or Streptococcus dysgalactiae.
Fresh milk of mastitis cows mainly has leucocytes (white blood cells) >106/ml as compared to nonmetastatic milk which has 70,000/ml leucocytes.
Milk contains a very adequate supply of B vitamins with pantothenic acid and riboflavin being the two most abundant. Vitamins A and D are added for human consumption, and their presence has no known effect on the activity of microorganisms.
Overall, the chemical composition of whole cow’s milk makes it an ideal growth medium for heterotrophic microorganisms, including the nutritionally fastidious Gram-positive lactic acid bacteria. However, the milk microbiota utilizes these constituents and brings about its spoilage.
the pH of an acidic solution is 2.47. what is the [H+]
[tex]pH=-\log[H^{+}]\\\\\implies [H^{+}] =10^{-pH}=10^{-2.47}=0.0034~M[/tex]
What is the correct formula that would
result from the combination of the two
ionic species?
K1+ and Cro 2-
Answer:
A
Explanation:
Is not my personal answer, but here is what I found.
"This entity has been manually annotated by the ChEBI Team. Potassium chromate is the inorganic compound with the formula (K2CrO4). This yellow solid is the potassium salt of the chromate anion"
The ________________and ______________ of magma cause igneous rocks to form.
A: melting and cooling
B: cementation and compaction
C: weathering and erosion
D: heat and pressure
Answer:
option B
cementation and compaction
3. Calculate the mass of NH3 that can be produced from the reaction of 125 g of NCI:
according to the following equation:
NCl3 + 3 H2O → NH3 + 3 HOCI
The mass of NH₃ : = 17.629 g
Further explanation
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Given
125 g NCl₃
Required
The mass of NH₃
Solution
mol NCl₃(molar mass : : 120.5 g/mol)
= 125 g : 120.5 g/mol
= 1.037
From the equation, mol ratio NCl₃ : NH₃ = 1 : 1, so mol NH₃ = 1.037
Mass NH₃(molar mass : 17 g/mol) :
= 1.037 x 17
= 17.629 g
give the structure of chlorocyclohexane.
don't spam :)
thankyou ~
Answer:
Explanation:
This is not my photo. I got it from this website.
https://pubchem.ncbi.nlm.nih.gov/compound/Chlorocyclohexane#section=2D-Structure
what is Newton's second law of motion
Answer:
Newton's second law of motion is F = ma, or force is equal to mass times acceleration.
Explanation:
Answer:
F= m x a
force = mass x acceleration
Explanation:
The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased.
What is the chemical name of the covalent compound SF6?
Answer:
The name of it is Sulfur Hexafluoride
Explanation:
Bonus fact: It is over 5 times heavier than air so when inhaling it, it makes your voice go very deep. The opposite of helium some would say
Which pictures show the car at zero acceleration? A. Picture 1 only. B. Pictures 1 and 3. C. Picture 2 and 4. D. Picture 4 only.
Picture 1 shows choice B
Explanation:
picture 1 shows the car to which the net force is a zero
When barium nitrate solution is added to aqueous sulfurous acid a white precipitate forms what is the name of that white precipitate
Answer:
I expect it is barium sulfate
Explanation:
if you add 3 mL of water to 1 ml of nadh mix and get an observance of 0.2 what is the concentration of the original nadh solution
Answer:
you are looking at the official nkana fc website
CH2CH3
CH3CH2-C-CH2CH3
CH3
what’s the IUPAC name?
How many carbon atoms are there in 5 molecules of C6H12O6?
Answer:
6
Explanation:
Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.