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A box weighing 77.0N rest on a table. a rope tied to the box runs vertically upward over the pulley and a weight is hung from the other end. Determine the force that the table exerts on the box if t
Gallium has an atomic mass of 69.7 amu. In a typical sample, 60.4% of Ga exists as Ga-69 (68.9257 amu). What is the identity and the atomic mass of the other isotope?
The plane releases the "care package" that falls to the ground along a curved trajectory. Ignoring air resistance, if all other factors remain the same, determine the time required for the package t
A shell traveling with speed Vo exactly horizontally and due north explodes into 2 equal mass fragments. One fragment traveling vartically up with speed V0 what is the velocity of the other one?
What is the final temperature (in °C) of 1.53 g of water with an initial temperature of 12.0°C after 7.478 J of heat is added to it?
A model rocket blasts off and moves upward with an acceleration of 13 until it reaches a height of 27 , at which point its engine shuts off and it continues its flight in free fall. What is the maxi
(a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
How much heat is gained (in Joules) by the water where a chemical reaction takes place in 100 mL aqueous solution and has a temperature increase of 14 C?
A 0.195 kg projectile is fired with a velocity of +715 m/s at a 2.00 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it
If the total blood volume of the individual is 5.1 L, how many grams of total blood cholesterol does the individual's body contain?
Consider the following equation: 2Mg(s) + O2 (g) → 2MgO(s). How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?
A cue ball (mass = 0.160 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.90 N·s to the ball. The ball then slides along
A 0.221 g pellet of potassium hydroxide,KOH, is added to 52.2 g water in a Styrofoam coffee cup. The water temperature rises from 23.5 to 24.4 °C. (Assume that the specific heat of dilute KOH a
The other is two (1,1-dimethyl)propyl, How to distinguish the aromatic proton signal when they are the three possible position: para, meta and ortho?
What is the net ionic and ionic equation of ferric chloride + sodium hydroxide?
A student placed 20.0g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.0 mL mark on the neck of the flas
After heating & cooling a 2.752-g sample of this unknown weighed 1.941 g. Could the unknown possibly have been Sr(NO3)2*4H20? Briefly explain & What is the probable identity of the student'
A boy whirls a stone in a horizontal circle 2.0 m above the ground by mean of a string 1.5 m long. The string breaks, and the stone flies off horizontally and strikes the ground 10 m away. What was
a saturated solution contains 11.0 g NaBrO3 in 40.0 mL of water at 0 degree Celsius. What is the solubility in g solute/(100 g H2O)? Calculate the mole fraction at this temperature.
A children's pain relief elixir contains 80.mg acetaminophen per o.50 teaspoon. The dosage recommended for a child who weighs between 24 and 35 lb is 1.5 teaspoons. What is the range of acetaminophe
Describe the metallic bonding with the help of valence bond theory.
A gas cylinder containing 6.38 mol of neon has a pressure of 491 mmHg at 295 k. If 3.22 mol helium is added at constant temp and pressure, what will be the pressure in the cylinder?"
A piston has an external pressure of 8.00. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.450 liters.