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เข้าร่วมเมื่อ 25 ก.พ. 2024
1.4 Composition of Mixtures
1. Answer the following questions about the mixture whose composition is listed in the table above.
(a) Calculate the percentage of NaCl by mass in this mixture.
(b) Calculate the percentage of Na by mass in this mixture.
(c) Calculate the percentage of Cl by mass in this mixture.
2. (b) Which of the following is more likely to represent the solid sample that was analyzed by the
student? Justify your answer.
a mixture of
AgNO3 and AgCl
a mixture of
AgNO3 and AgBr
3. A student needs to analyze a mixture that contains BaCl2 and NaCl. The student dissolves a
6.75-g sample of this mixture completely into water and adds an excess amount of Na2SO4(aq).
A white precipitate of BaSO4(s) is formed, based on the following chemical equation.
BaCl2(aq) + Na2SO4(aq) → 2 NaCl(aq) + BaSO4(s)
The solid precipitate is filtered, dried, and weighed, and its mass is recorded as 2.36 g.
(a) Calculate the number of moles of BaSO4(s) that is recovered in this experiment.
(b) Calculate the percentage of BaCl2 by mass in this mixture.
4. A mixture of CaCO3 and Na2CO3 is found to contain 35.00% Na by mass. Calculate the percentage
of Na2CO3 by mass in this mixture.
(a) Calculate the percentage of NaCl by mass in this mixture.
(b) Calculate the percentage of Na by mass in this mixture.
(c) Calculate the percentage of Cl by mass in this mixture.
2. (b) Which of the following is more likely to represent the solid sample that was analyzed by the
student? Justify your answer.
a mixture of
AgNO3 and AgCl
a mixture of
AgNO3 and AgBr
3. A student needs to analyze a mixture that contains BaCl2 and NaCl. The student dissolves a
6.75-g sample of this mixture completely into water and adds an excess amount of Na2SO4(aq).
A white precipitate of BaSO4(s) is formed, based on the following chemical equation.
BaCl2(aq) + Na2SO4(aq) → 2 NaCl(aq) + BaSO4(s)
The solid precipitate is filtered, dried, and weighed, and its mass is recorded as 2.36 g.
(a) Calculate the number of moles of BaSO4(s) that is recovered in this experiment.
(b) Calculate the percentage of BaCl2 by mass in this mixture.
4. A mixture of CaCO3 and Na2CO3 is found to contain 35.00% Na by mass. Calculate the percentage
of Na2CO3 by mass in this mixture.
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1.3 Elemental Composition of Pure Substances PART TWO
มุมมอง 3521 ชั่วโมงที่ผ่านมา
Another way to determine the empirical formula of a compound is to use data from a combustion experiment. If a compound that contains carbon and hydrogen is burned in the presence of excess oxygen gas, the carbon will be converted into CO2 and the hydrogen will be converted into H2O. If the compound contains other elements such as nitrogen or sulfur, other gases may be formed. Mass of sample th...
1.3 Elemental Composition of Pure Substances PART ONE
มุมมอง 30วันที่ผ่านมา
12. Calculate the percent composition by mass of each element in glucose (C6H12O6). 14. What is the empirical formula of glucose? 16. A certain compound has the following percent composition by mass. 52.14% C 13.13% H 34.73% O Determine the empirical formula of this compound. 17. A pure sample of tin (Sn) with a mass of 6.18 g is burned in air until the tin is completely converted into tin oxid...
1.2 Mass Spectroscopy of Elements
มุมมอง 26วันที่ผ่านมา
8. Based on the information shown above, (a) calculate the average atomic mass of the element. (b) What is the most likely identity of this element? 10. A certain element has two naturally occurring isotopes with mass numbers of 63 and 65. (a) What is the most likely identity of this element? (b) Fill in the table below. Mass Number Protons Neutrons 63 65 (c) Which isotope of this element, mass...
1.1 Moles and Molar Mass
มุมมอง 20วันที่ผ่านมา
2. Calculate the number of moles of C4H10 present in 2.00 g C4H10. 3. Calculate the number of atoms of Si present in 35.0 mol Si. 5. Calculate the mass, in grams, of 8.2 × 1022 molecules of CHCl3.
AP Calc BC 2023 FRQ #5
มุมมอง 5614 วันที่ผ่านมา
5. The graphs of the functions f and g are shown in the figure for 0 £ x £ 3. It is known that 12 g(x) = 3 x for x ≥ 0. The twice-differentiable function f , which is not explicitly given, satisfies f(3) = 2 and 3 ∫ f(x) dx = 10 0 . (a) Find the area of the shaded region enclosed by the graphs of f and g. (b) Evaluate the improper integral ∫0 ∞ 2 (g(x)) dx, or show that the integral diverges. (...
AP Calc BC 2023 FRQ #3
มุมมอง 3014 วันที่ผ่านมา
3. The depth of seawater at a location can be modeled by the function H that satisfies the differential equation dH dt H 1 t 2 1 cos 2 = ( − ) ( ), where H t( ) is measured in feet and t is measured in hours after noon (t = 0). It is known that H( )0 = 4. (a) A portion of the slope field for the differential equation is provided. Sketch the solution curve, y = H t( ), through the point ( ) 0, 4...
AP Calc BC 2023 FRQ #1
มุมมอง 3514 วันที่ผ่านมา
1. The temperature of coffee in a cup at time t minutes is modeled by a decreasing differentiable function C, where C t( ) is measured in degrees Celsius. For 0 £ £t 12, selected values of C t( ) are given in the table shown. (a) Approximate C¢( )5 using the average rate of change of C over the interval 3 £ £t 7. Show the work that leads to your answer and include units of measure. (b) Use a le...
AP Calc BC exam FRQ #5
มุมมอง 2221 วันที่ผ่านมา
The function f is twice differentiable for all x with f( )0 = 0. Values of f ¢, the derivative of f , are given in the table for selected values of x. (a) For x ≥ 0, the function h is defined by h x 1 f t d x 0 2 ∫ () ( = ¢( )) t. Find the value of h¢(p). Show the work that leads to your answer. (b) What information does p 1 f x 0 2 ∫ ¢ ( ( )) dx provide about the graph of f ? (c) Use Euler’s m...
AP Calc BC 2024 exam frq #4
มุมมอง 4021 วันที่ผ่านมา
The graph of the differentiable function f , shown for −6 £ £ x 7, has a horizontal tangent at x = −2 and is linear for 0 £ £ x 7. Let R be the region in the second quadrant bounded by the graph of f , the vertical line x = −6, and the x- and y-axes. Region R has area 12. (a) The function g is defined by ∫ g x f t dt x 0 ( ) = ( ) . Find the values of g(−6), g( )4 , and g( )6 . (b) For the func...
AP Calc BC 2024 FRQ #3
มุมมอง 2621 วันที่ผ่านมา
The depth of seawater at a location can be modeled by the function H that satisfies the differential equation dH dt H 1 t 2 1 cos 2 = ( − ) ( ), where H t( ) is measured in feet and t is measured in hours after noon (t = 0). It is known that H( )0 = 4. (a) A portion of the slope field for the differential equation is provided. Sketch the solution curve, y = H t( ), through the point ( ) 0, 4 . ...
AP Calc Bc 2024 Ap test Q #2
มุมมอง 3821 วันที่ผ่านมา
A particle moving along a curve in the xy-plane has position ( () x t , y t( )) at time t seconds, where x t( ) and y t( ) are measured in centimeters. It is known that x t 8t t 2 ¢( ) = − and y t t t 20 1.2 ¢ = ( ) − . At time t = 2 seconds, the particle is at the point (3, 6). (a) Find the speed of the particle at time t = 2 seconds. Show the setup for your calculations. (b) Find the total di...
AP Calc BC 2024 Frq #1
มุมมอง 3921 วันที่ผ่านมา
1. The temperature of coffee in a cup at time t minutes is modeled by a decreasing differentiable function C, where C t( ) is measured in degrees Celsius. For 0 £ £t 12, selected values of C t( ) are given in the table shown. (a) Approximate C¢( )5 using the average rate of change of C over the interval 3 £ £t 7. Show the work that leads to your answer and include units of measure. (b) Use a le...
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So cool thx
just let me use my damn power rule 😭😭
Reduce the size of your webcam, it is too big😂
Nice video. You should do a tutorial on the Seifert Van Kampen theorem! Nice work.
is it not 9^2 /7 since its 9^3/9^1 = 9^2
I guess my question is im confused when you go from taking the constant out of the integral
@@pabloooooooooooo6621 just for the sake of simplicity it looks cleaner in my opinion
yes when he crossed out terms and brought the constant outside the integral he forgot to include 9^2
was this prerecorded cuz the damn test is literally 7 motnhs away lmao
I think for sake of completion you should still substitute back in what theta is in terms of x.
i still don’t understand how you thought of this in the first place, like how does it makes sense?
This is a substitution method used by mathematicians that do calculus that I had learned earlier, if you have any further questions I can clear up any confusion on a particular subject!
@@kinetictutoring-ku4wk Thanks for the solution, just 1 issue, while factoring out 9 cube and nine you only left a 9 instead of 9 square
hwllo
really appreciate the help 🙏🙏🙏
thank you i was really wondering the answer to ap physics c ap exam set 1 question 2 🙏🏻🙏🏻
super helpful thank you
needed this 🙏
For part B the line should be vertically placed on x axis
Been waiting for this one🔥
In the last part you forgot the sin(theta) when you plugged your stuff into the kinematic equation
My IB Sl physics mind cannot comprehend this 😥
What really bugged me was I couldn't figure out why there is no friction acting on the ball at point B. Can you explain? (Btw Thanks for making a video)
Not sure... I think if it's rolling wihtout slipping there has got to be a static frictional force. I think he just made a mistake
@@perryo1063 There was no static force on CB's official solution either.
How was your prom night young gentleman?
Solve my marriage issues please
No Cap!
Electric fields bro, pls make this!
Sorry, could you please elaborate a little further???
@@kinetictutoring-ku4wk Certainly bro, I have a few advanced problems specific to this section I need you to tackle and solve more,thks in advance!
what about FRQ 3?
expect a response video within the next 24 hours!
@@kinetictutoring-ku4wk thank you so much!!
what did you score on your latest test?
I was also wondering the same thing, surely this intelligent young man aced it!
W video🔥
ion think she wants me anymore bro
focus on urself king
i don’t get it
I apologize if I couldn't explain this concept clearly enough, where did you seem to get lost?
Do you know enough astrophysics to do videos on it? Or rocket dynamics such as escape velocity of a planet?
I have not studied astrophysics yet, but if you had any questions do not hesitate to send them over to my work email @kinetictutoringemail@gmail.com, and I will take a look at the problems to see if it is within my capabilities!
Thanks for making this video and answering my question!
How would one find the differential equation of motion in the first place?
stay posted, will post a response within the next 24 hours my friend
@@kinetictutoring-ku4wkgreat, looking forward to learning.
Wow i learned sm
thx teach😊
Wait. I am still confused. Pls clarify
oh…
Wow
Yay!
Tysm. I needed this
thanks vro
you didn't answer my question from last video
on a real note mac demarco or strawberry guy
Physics only.
thanks i learned a lot