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Objects with masses of 180 kg and a 480 kg are separated by 0.410 m. Find the net gravitational force exerted by these objects on a 58.0-kg object placed midway between them
a 450.0 mL sample of a 0.273 M solution of silver nitrate is mixed with 400.0 mL of 0.200 M calcium chloride. what is the mass of the solid produced
what mass of ammonium chloride must be added to 2.00L of 0.450M ammonia to produce a buffer with pH=9.50 Kb=1.8E-5 for ammonia
Using the periodic table, arrange the atoms in each of the following sets in order of increasing electronegativity: a) CL, F, Br; b) B, O, N; c) Mg, F, S
Two capacitors connected in parallel produce an equivalent capacitance of 35.0?F, What is the individual capacitance of each capacitor
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 15.4m above the ground, Use the work-energy theorem to find its maximum height
Unknown Q is determined to have a molecular formula of C6H12O. Q is not optically active, and passing it through a chiral column does not separate it into enantiomers.
On an essentially frictionless, horizontal ice rink, a skater moving at 6.0m/s encounters a rough patch, Use the work-energy theorem to find the length of this rough patch.
0.150 M HC2H33O2 (Ka=1.8E-5) is titrated with 0.300M NaOH, calculate the pH half way to the equivalence point
A counter with negligible background gives exactly 10,000 counts in a 1-s period when a standard source is in place. What is the counter dead time
what mass of Fe (OH)3 would be produced by reacting 75.0 mL of a 0.0815M Fe( NO3)3 solution with 125 mL of a 0.150 M NaOH solution
a saturated solution of copper(I) chloride, CuCl, has [Cu^+]=1.1x10^-3 M and [Cl^-]=1.1x10^3 M. what is the value of Ksp for CuCl
A rotating wheel requires 6.00 s to rotate 30.0 revolutions, What is the constant angular acceleration (in rad/s) of the wheel
A soluble salt, AgNO3, with a common ion is added to a saturated solution of AgCl to give [Ag^+]=2.0x10^-2 M. what is the [Cl^-]? AgCl Ksp=1.8x10^-10
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.04 m, respectively. The respective rotational speeds are 452 rev/min and 4,140 rev/min. Calculate the s
What alcohol would be most easily dehydrated. One that is on a long chain or a short chain
A source of 116m In (half-life = 54.0 min.) is counted using a G-M tube. Successive 1-min observations gave 131,340 counts, calculate the true interaction rate in the G-M tube at 12:00
For each of the following slightly soluble salts, write the equilibrium equation for dissociation and the solubility product expression: a)CuS b)Ag2SO4 c)Zn(OH)2
A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.8 x 10^4 rev/min, Determine the angle (in radians) through which the drill rotates during this
How many 2p atomic orbitals from boron must be mixed with a 2s atomic orbital to yield the bonding hybrid atomic orbitals in BF3. WHY
A potter's wheel moves uniformly from rest to an angular speed of 0.18 rev/s in 28.0 s, Find its angular acceleration in radians per second per second
Draw the electron-dot formula and predict the shape for each polyatomic ions: a) NO2^-; b) PO4^3-; c) ClO4^-; d) SF3^+.
would increasing the volume of the equilibrium mixture of each of the following reactions cause the equilibrium to shift and if so will the shift be toward products or reactants
Use VSEPR theory to predict the shape of each molecule: a) CF3; b) NCl3; c) SCl2; d) CS2; e) BFCl2.