darlinshe

I am contemplating whether I should purchase a router for connection to my LAN cable but I have downloaded connectify me in my laptop. I'm not sure which one is better or should I still purchase a new router? Any suggestions please?

how many mL of a 0.250 M KCl solution must be diluted to 1.000 L so that the diluted solution (density = 1.00 g mL-1) is 400 ppm K+ by weight ? (MW KCl = 74.55, atomic weight of K = 39.10)

laboratory A reported the Magnesium (atomic weight = 24.31) content of a solution (density = 0.985 g mL-1) as 194 ppm by weight, whereas laboratory B reported the Magnesium content of another sample of the same solution as 8.15mM. Which laboratory measurement was the larger?

I seriously think my friend likes my crush. She didn't tell me but I can feel it! My crush and I are quite close friends and sometimes he tells me that my friend smses him almost everyday and talks to him whenever he's online! What should I do? I couldn't just confess to the guy I like and tell my friend off :( That would ruin our relationship. P.s. my friend knows that I like him. Help!

For fractional distillation, what is happening at points where the temperature changes?

Thanks!

Is it true that f((g+h)x)=f(g(x)) + f(h(x))?

What are the hazards of the experiment of recrystallization using the solvents water, ethanol, ethyl acetate and hexane?

Thanks:)

An acetate buffer is prepared by adding 40 ml of 1.00 M acetic acid to 200 ml of

an aqueous solution containing 2.00 grams of sodium acetate. The final solution is

diluted to 300 ml. (The molecular weight of sodium acetate is 82.0g/mole, and the

pKa of acetic acid is 4.76)

1). What is the pH of the solvent system?

2). What would the final pH be if 10 ml of 1.0 M of hydrochloric acid is added into this

buffer solution? Is this still a good buffer?

3). What would the pH have been if the buffer hadn’t been present? (The same amount of

acid is added into water directly).

What are the hazards of the experiment of recrystallization using the solvents water, ethanol, ethyl acetate and hexane?

Thanks:)

A skydiver jumps out of a hovering helicopter. 3 seconds later, another skydiver jumps out, so they both fall along the same vertical line relative to the helicopter. Both sky divers fall with the same acceleration.

Does the vertical distance between them (a) increaes, (b) decrease, or (c) stay the same?

Does the difference in their velocities (d)increase, (e)decrease or (f)stay the same? (Assume that g is constant).

Thanks :)

1. If the velocity of a particle is nonzero, can the acceleration be zero? Why?

2. If the velocity of a particle is zero, can the particle's acceleration be zero? Why?

Thanks!

Define east as the negative direction and west as the positive direction. (a) If a car is travelling east, its acceleration must be eastward. (b) if a car is slowing down, its acceleration may be positive. (c) An object with constant nonzero acceleration can never stop and stay stopped.

A certain cable car in San Francisco can stop in 10 s when traveling at maximum speed. On one occasion when the cable car is traveling at maximum speed, the driver sees a dog a distance d meters in front of the car and slams on the brakes instantly. The car decelerates constantly and reaches the dog 8.0 s later, and the dog jumps off the track just in time. If the car travels 4.0 m beyond the position of the dog before coming to a stop, how far was the car from the dog? (Hint: You will need three equations)

Please help me with this thanks:)

A taxi company charges $3.00 for the first kilometer or less traveled. For every 400 meters thereafter it charges $0.20. Express the cost (in dollars) of a ride, as a function of a distance x traveled (in kilometers), where we specify the values of x to be [0,5].