Answer:
89%
Explanation:
The computation of the sample percentage is sugar is shown below:
As we know that
The mass of the total sample mixture is
= Mass of salt + mass of sugar
= 0.8920
And, the mass of salt is 0.0982 g
So, the mass of sugar is
= 0.8920 - 0.0982
= 0.7938 g
Now the percentage of the sample is sugar is
= 0.7938 ÷ 0.8920
= 89%
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C, the rate constant of the reaction is 1.94 × 10-4 min-1. If the initial pressure of N2O is 3.50 atm at 730°C, calculate the total gas pressure after one half-life. Assume that the volume remains constant. Insert your answer in decimal notation rounded to 3 significant figures.
Answer:
the total gas pressure after one half-life is 4.38 atm
Explanation:
The balanced equation for the decomposition of N2O to N2 and O2 is given as:
2N₂O(gas) ⇒ 2N₂(gas) + O₂(gas)
2 moles of N₂O produce 2 moles of N₂ and 1 mole of O₂
The change in pressure depends on the coefficient (number of moles) of the reactant and product.
N₂O N₂ O₂
number of moles 2 2 1
Initial pressure (atm) 3.50 0 0
change in pressure -2x +2x x
Final pressure (atm) 3.50 - 2x 2x x
The total final pressure is the sum of the individual total pressure. i.e.:
Total final pressure = final pressure of N₂O + final pressure of N₂ + final pressure of O₂
Total final pressure = (3.5 - 2x) + (2x) + x
Total final pressure = 3.5 + x
After one half life, the initial pressure of N₂O would be half its value.
Final pressure of N₂O = half of the initial pressure of N₂O
3.5 - 2x = 0.5(3.5)
3.5 - 2x = 1.75
2x = 1.75
x = 0.875 atm
Therefore, Total final pressure = 3.5 + x = 3.5 + 0.875
Total final pressure = 4.38 atm to 3 significant figures
How many formula units are in 4.52 moles of H3SO3?
Type your answer
Answer:
The answer is 98.07848. We assume you are converting between grams H2SO4 and mole. You can view more details on each measurement unit: This compound is also known as Sulfuric Acid. The SI base unit for amount of substance is the mole. 1 grams H2SO4 is equal to 0.010195916576195 mole.
Quick conversion chart of moles H2SO3 to grams
1 moles H2SO3 to grams = 82.07908 grams
2 moles H2SO3 to grams = 164.15816 grams
3 moles H2SO3 to grams = 246.23724 grams
4 moles H2SO3 to grams = 328.31632 grams
5 moles H2SO3 to grams = 410.3954 grams
6 moles H2SO3 to grams = 492.47448 grams
7 moles H2SO3 to grams = 574.55356 grams
8 moles H2SO3 to grams = 656.63264 grams
9 moles H2SO3 to grams = 738.71172 grams
10 moles H2SO3 to grams = 820.7908 grams
Someone please answer my question for 100 points
I'm giving 100 points for that question
https://brainly.com/question/21777272
If you don't want to get reported and want brainiest, answer the question and don't just spam some random things. I really need help with this that's why I'm giving so many points
ok i will so tell me the question
Calculate the relative formula mass of Zn(NO3)2. Round your answer to the nearest whole number?
Answer:
189
Explanation:
189
The relative formula mass of Zn(NO₃)₂ is 189.38g.
How do we calculate the mass of any compound?Molecular mass of any formula of compound will be calculated by adding the molar mass of each atoms present in the given compound.
Molecular mass of Zn(NO₃)₂ = Sum of the molar mass of Zinc, nitrogen and oxygen atoms.
Molecular mass of Zn(NO₃)₂ = 65.38g/mol + 2(14g/mol) + 6(16g/mol) = 189.38g
Hence the required mass of Zn(NO₃)₂ is 189.38g.
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Gauging yourself against others is acceptable in competitive sports.
Answer:
Yup it is acceptable.
U comparing yourself will place u above and below some people for sure.
So you will know to where you have to develop and can get yourself satisfied as you will be above some people.
Gauging yourself against others is acceptable in competitive sports is acceptable.
What is Competitive sports?Faster, higher, stronger is the Olympic motto frequently used in competitive sports. The Olympic slogan "To be there is everything" causes confusion, although it is actually highly false and the complete reverse.
Competitive athletes receive a planned training program. To attain particular objectives, the quantity and quality of each individual training block are carefully calculated.
The scope, duration, number, and load of each individual training unit are adjusted according to the level of fitness and the proximity to the season's peak throughout the year.
Therefore, Gauging yourself against others is acceptable in competitive sports is acceptable.
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Which of the following best describes an advantage of genetic engineering?
Can reduce long-term health problems among consumers of GMO
Increases regulation of sale and consumption of healthy food
Reduces harmful impact on natural ecosystem in the future
Can produce crops having high level of nutrition
Answer:
d
Explanation:
d
Answer:
D. Can produce crops having high level of nutrition.
Explanation:
Some benefits of genetic engineering in agriculture are increased crop yields, reduced costs for food or drug production, reduced need for pesticides, enhanced nutrient composition and food quality, resistance to pests and disease, greater food security, and medical benefits to the world's growing population.
Three benefits to genetic engineering are the crops can survive better, leading the farmers to make more money, the crops can grow in more locations, and the plants can be modified to help people
Which statement is not an example of intercellular communication?
Answer:
D: A white blood cell produces antibodies.
Explanation:
Intercellular communication is defined as the process of communication that occurs between the two cells of the same organism.
Now, these two cells relate which each other when a signal reception receives a single molecule at a distance that could be short or long which in turn produces a cellular response.
Thus, looking at the options, the correct answer is Option D.
Concentration data is commonly monitored during a reaction to determine the order with respect to a reactant. Consider the types of observations listed, and determine which order is likely for that reactant. Assume all other factors are held constant. The reaction rate increases in direct proportion to the concentration of the reactant in solution.
1. An increase in the concentration of the reactant in solution causes the reaction rate to increase exponentially.
a. first order.
b. second order.
c. zero order.
2. The reaction rate is constant regardless of the amount of reactant in solution.
a. first order.
b. second order.
c. zero order.
3. The reaction rate increases in direct proportion to the concentration of the reactant in solution.
a. first order.
b. second order.
c. zero order.
Answer:
1) first order
2) zero order
3) second order
Explanation:
For a first order reaction, the concentration of the reactants varies exponentially with the rate of reaction. The curve of a first order reaction shows an exponential relationship between the rate of reaction and the change in the concentration of reactants.
For a zero order reaction, the rate of reaction is independent of the concentration of the reactants. So, regardless of the amount of reactant in solution, the rate of reaction is constant.
For a second reaction, the reaction rate increases in direct proportion to the concentration of the reactant in solution.
6. What is the highest
labeled point on the
map?
7. What is the difference
in elevation between the
highest point on the map
and point W?
8. Which letter (W.XY
or Z) represents a
gentle slope?
9. What is the elevation
of point X?
Answer: I think 35
Explanation:
Use the information in the table to identify the metal
with a volume of 1.38 cm3.
O aluminum
O zinc
O chromium
O nickel
Answer:zinc
Explanation:
What mass of HBO2 is produced from the
combustion of 139.5 g of B2H6?
Answer in units of g.
Answer:
[tex]m_{HBO_2}=441.8gHBO_2[/tex]
Explanation:
Hello there!
In this case, since the combustion of B2H6 is:
[tex]B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O[/tex]
Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:
[tex]m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}[/tex]
[tex]m_{HBO_2}=441.8gHBO_2[/tex]
Best regards!
Filtration definition 
Answer:
the action or process of filtering something.
What happens to the potential energy of water in a stream as gravity pulls it downhill
In the Fischer esterification reaction, a carboxylic acid reacts with an excess of alcohol in acidic conditions to form an ester. During the reaction the sp2sp2 hybridized carbonyl carbon of the acid forms an sp3sp3 hybridized intermediate before returning to sp2sp2 hybridization in the product. Draw the structure of the neutral sp3sp3 hybridized intermediate and the ester product in the reaction between pentanoic acid and n‑propanol.
Answer:
See explanation and image attached
Explanation:
Esterification is a reaction of an alkanol and an alkanoic acid to yield an ester and water as products. It is analogous to inorganic neutralization reaction.
The process may be acid catalyzed. As mentioned in the question, the process of ester formation between pentanoic acid and n‑propanol first involves the carbonyl in going through an sp3 hybridized intermediate before returning to sp2 hybridized state in the product.
The image of the neutral form of this intermediate as well as the final structure of the ester are both shown in the image attached to this answer.
give the result of the following expression with the correct number of significant figures
[tex]84 \frac{m}{s} \times 32.533s[/tex]
How many grams are there in 5.14 x 10^24 molecules of Crl3?
Answer: 2.5c3
Explanation: Your welcome!
In calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by which symbol
Answer:
C.
Explanation:
Specific heat capacity of a substance can be defined as the amount of heat a gram of the substance must lose or absorb in order to change its temperature by a degree Celsius. It is measured in Joules per kilogram per degree Celsius (J/kg°C).
Generally, the specific heat capacity of water is 4.182J/kg°C and is the highest among liquids.
Heat capacity or quantity of heat is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of the substance.
dt represents the change in temperature.
Hence in calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by the symbol C.
7
Which of the following is a correct model for nitrogen?
Answer:
you never gave us the choices to go over. sorry
What are metalloids?
A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.
Answer:
Metalloid, in chemistry, an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal. There is no single property which can be used to unambiguously identify an element as a metalloid.
Explain how scientists determine the composition of stars.
What statements below correctly describes plasma
Answer:
b-c-e-f
Explanation:
the reason its b is becouse its a part of youre body and doesint cunduct any electrisity well if you think youre brain in electrisity that maybe it is.
its c becouse it has kenetic energy in youre body without it you wont have kenetic energy.
the reason its e is becouse its a coution to use plasma and it gives you a bunch of electrons.
the reason its i is becouse its a big neutural particle of youre body
what does not affect the speed of an object that is pushed?
Answer:
balanced forces do not affect the motion of the object.
Explanation:
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhgggggggggggg
Which type of galaxy is least likely to have many
stars forming?
Answer:
Elliptical galaxies
Explanation:
elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born.
Organelles______are specialized structures that carry out particular jobs and functions?
Add one or more curved arrows to show the movement of electrons in the reaction. To draw the arrows, select More in the drawing menu, then select the appropriate curved arrow. Click on a bond or electron to start a curved arrow. Do not start from an atom. Use the select tool to move the arrow head and tail to the desired placement. When the curved arrow changes from red to black, your arrow has an appropriate starting and ending point. Draw curved arrows. Select Draw Rings More Erase С 0 heat -=-=- H3C—0. +.0—CH HCO CH, 2
Answer:
H3C - O - O - CH -HCOCH2.
Explanation:
Before chemical reaction can occur, some steps has to be followed in order to give the final product (s), this steps can be shown by drawing the chemical compound and showing how bonds are being broken or formed. Showing this in a stepwise manner is known as reaction mechanism.
From the question above, it is given that the products after heating the reactant gives H3C—0. +.0—CH HCO CH2.
The starting material can be deduce as;
H3C - O - O - CH -HCOCH2.
Heat causes something to divide or melt. Kindly check the attached picture which shows how the deduced starting compound splits to give H3C—0. and .0—CH HCO CH2.
The reaction between nitric oxide and oxygen is described by the following chemical equation:
2NO+ 2O2 â 2NO2
2NO+ 2O2 â 2NO2 + O
Suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction. Suppose also that the second step of the mechanism should be bimolecular. Suggest a reasonable second step. That is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.
Answer:
See explanation
Explanation:
A non elementary reaction is a reaction that does not take place in a single reactive encounter. Non elementary reactions take place in steps. These steps are referred to as the reaction mechanism.
The reaction between nitric oxide and oxygen is a non elementary reaction. It takes place in two steps as i will now show below;
Step 1
NO(g) + O2(g) -------> NO2(g) + O(g)
Step 2
NO(g) + O(g) ---------> NO2(g)
Overall reaction equation
2NO(g) + O2(g) ----------> 2NO2(g)
Answer:
NO(g)+O(g)---> NO_2(g)
Explanation:
What is the Molar Mass of Iron(Fe)? and also state how many particles there are in one mole of iron.
When can Eric Wu take pictures of the three Moon
features?
Answer:
Eric Wu cannot take his pictures on any night because as the Moon orbits the sun different angles of the illuminated half of the Moon is being shown as the days go on. So on some nights the areas of the Moon that Eric Wu wants to take pictures of may not be shown on the Moon because the area is not facing earth.
Explanation:
give me brainly Est
why do Eastshore sculptures keep changing?
Answer:1. the junk sculpture rules say the forms have to change every two weeks or be taken clear down. 2. the weather and other people change the forms after they are built
Explanation:
Explanation:
1. The junk sculpture rules say the forms have to change every two weeks or be taken clear down.
2.The weather and other people change the forms after they are built.
I hope it's helpful!
Science
What part of all organisms Is involved in the exchanging of gases
Answer:
Gas exchange occurs in microscopic dead-end air-filled sacs called alveoli, where a very thin membrane (called the blood-air barrier) separates the blood in the alveolar capillaries (in the walls of the alveoli) from the alveolar air in the sacs.
Explanation: