Balance the following equations:

__CuS2 + HNO3 →

__Cu (NO3) 2 + __H2SO4 +

__N2O + ___H20

19) How many grams are in 5 lbs.? (2.2 lbs = 1000 g)

How many neutrons are in one atom of the elemen, F-19?

Quick question I have a question. If a question has the numbers 500kg and 3000N, how mant significant digits should the answer have?

Why do Man holes (road) build by use only circular type?

Two cars, car A and car B, have equal mass. Which car has the greater kinetic energy if both cars have the same velocity?

Which statement best explains why carbon is present in so many kinds of molecules? Question 1 options: It is abundant on earth, so it is readily available to bond with other elements. It does not form strong bonds, so it breaks apart.

How long does it tae for bleach to evaprate?

What product (s) forms at the cathode in the electrolysis of an aqueous solution of k2so4?

What element is used as a shield to protect people from radioactive substances?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays