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Questions (21)
A pure gold coin contains 0.147 mol of gold(Au). What is its mass in grams? Note that molar mass of gold is 196.97 g/mol.
3 answers
498 views
How is the flame test used to identify cations?
1 answer
202 views
Na2CO3+CH3COOH
1 answer
273 views
Calculate the number of moles of sulfur in 57.1 g of sulfur. Note that molar mass of sulfur is 32.06 g/mol
3 answers
440 views
How many gold atoms are there in a pure gold ring containing 0.099 mol Au?
3 answers
383 views
One neon sign flashes every 6 seconds . Another neon sign flashes every 8 seconds . If they flash together and you begin
5 answers
2,219 views
find the magnitude and dirction of the resultant force of two perpendicular forces F1=3N and F2=4N
1 answer
457 views
A construction company uses a crane to lift a wrecking ball2000kg the crane can cause the wrecking ball to speed up from rest to
3 answers
564 views
If tanx + cotx =5 tgen find tan^2x +cot^2x
2 answers
626 views
Calculate the pH of a buffer formed by mixing 85 mL of 0.16 M nitrous acid (HNO2, Ka = 4.6X10^-4) with 94 mL of 0.15 M sodium
2 answers
674 views
In a hospital 6 deliveries have been occurred. The probability that the baby is female equal 0.48
a. Find the probability
1 answer
475 views
A teacher prepares 5 different books for 7 students.If each student can get one or no book from the teacher , find the number of
4 answers
514 views
One of the aspects of instructional scaffolding is ownership which values the students own interpretations and requires them to
4 answers
436 views
a) Determine the equation of a sine function that would have a range of {y€R|-7<(or equal) Y <(or equal) 1} and a period of
3 answers
1,048 views
Determine the roots of the function f(x)=-2cos(3x)-1. Can you please show all the work so it is easier to understand, thank
5 answers
1,196 views
What are the steps to graphing this quadratic equation? Y=(-2x)^2
3 answers
541 views
Solve for y to determine the inverse
y=2-(1/2x)
1 answer
454 views
A sail boat on lake Huron leaves Southampton and sails 20degrees west of north of 20km. At the same time, a fishing boat leaves
3 answers
764 views
Two fire stations,P and Q,are 20 km apart. A ranger at station Q sees a fire 15.0 km away. If the angle between the line PQ and
6 answers
3,834 views
The Pont du Gard near Nimes, France is a roman aqueduct. An observer in a hot air balloon some distance away from the aqueduct
3 answers
1,239 views
The Pont du Gard near Nimes, France is a roman aqueduct. An observer in a hot air balloon some distance away from the aqueduct
5 answers
3,280 views
Answers (16)
How many gold atoms are there in a pure gold ring containing 0.099 mol Au?
2/3 -F The force is represented as a positive quantity and is repulsive Electrostatic force is inversely proportional to the square of the distance The direction of the force changes and the magnitude of the force quadruples
@Reagan no they didn't
Whales and seals is the answer
Jdjrjue
ok.assume the water is contain in a tube of u-shaped. When there is a suituation u mentioned above happen in t=0s then,when t>0s the water level will be the same REASON: by conservation of energy (*set the lowest pt of the tube is the reference level)
but the correct ans is 2520,why?
in fact , u can substitude -5 into the x variable,and the write it like this: 2(-5)^3+9(-5)^2+k(-5)-15=0 then plz find k
What would an example be. Because on my handout it says provide an example of how this aspect impacts the teachers choices and decisions.
Srry I keep asking questions, but I noticed that you left out the negative sign on the 2 when you set the equation to zero, was that a mistake or were you suppose to do it like that?
Ok I was wondering why the zero with the slash was in the equation, i have never seen that before!
Ok so how did you get x to equal 20, 140,100........ And I also don't get where 3x=60 or 100 came from, can you please explain these parts by showing the math? Thank you
Srry but how did u get 145?
Thank you so much:)
Um the answer I was given was 5.7km or 30.5km So how wud u get these answers?
I'm not sure if it is parllel, it dosent have a diagram so it got me confused! But I know it is not in 3D, the answer in the txtbook is 299.7m, I just need the method to get it
