Chemistry :/
A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 mL of 0.1063 M HCl to reach the bromocresol green end point. Find the weight percent of NH3 (FM 17.031) in the cleaner.
History
what were the roman laws called that applied to all citizens in the roman empire
Math--Please Help!!
Auto parts dept. sends out a mean of 6.3 special orders daily. What is the probability that, for any day, the number of special orders sent out will be at least 4?
physics
A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10 6 m.Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11N · m2/kg2
physics
In introductory physics laboratories, a typical Cavendish balance for measuring the gravitational constant G uses lead spheres of masses 1.79 kg and 16.9 g whose centers are separated by 5.49 cm. Calculate the gravitational force between these spheres, treating each as a point...
physics
A satellite moves in a circular orbit around the Earth at a speed of 6.1 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal gravitat...
physics
A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10^6 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10^−11N · m2/kg2. Answer i...
physics
A model airplane of mass 0.7 kg is attached to a horizontal string and flies in a horizontal circle of radius 5.6 m, making 1.6 revolutions every 7 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the plane.) The acc...
physics
An air puck of mass 0.33 kg is tied to a string and allowed to revolve in a circle of radius 1.12 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 1.1 kg is tied to it. The suspended mass remains ...
Chemistry
What is the value of Kp for the reaction: NO2(g)+CO(g)->NO(g)+CO2(g) Given the following information: 2NO2(g)->NO3(g)+NO(g) Kp=2.72x10^(-4) 2NO2(g)+2CO2(g)->2NO3(g)+2CO(g) Kp=5.73
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