haya

we did a lab on chemical change, where we had to see how a chemical change affcts mass. so we measure the mass of 20ml of copper solution, and 2cm(cubed) of steel wool, and then we mixed them into a flask. soon the steel wool turned rusy, and broke apart....

why is it that when water is decomposed through a process call electrosys (when electricity is put through water)there is more volume of hydrogen than oxygen produced?

what are the names of five strait's

Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree at an angle of 33° above the horizontal. One child, with a mass of 51 kg, is 1.4 m along the branch from the tree trunk. The other child, with...

A stick is cut into three pieces,each having a different length.Each piece(except the shortest)is twice as long as another piece.What fraction of the whole stick is each piece?

Each sheet of metal is 2.9 centimeters thick. If Mary stacks 20 sheets on top of each other, how thick will the stack be? 2.9/ 20=.145

nitrogen and hydrogen react to form ammonia. N2+3H2=2NH3. 12 dm3 of hydrogen reacted with excess nitrogen to form 2 dm3 of ammonia. what is the percentage yield of ammonia at room temperature and pressure

A ball is thrown horizontally from a window 27 m above the ground. The ball strikes the ground at a point 80 m from the base of the building. The acceleration due to gravity is 9.8 m/s2. What is the resultant velocity of the ball just before it strikes th...

You are designing a large rectangular fish tank for your tropical fish. The length will be 1 yard 3 inches, the width will be 1.5 feet, and the height will be 20 inches. Find the volume of the fish tank in cubic inches

yah we weighed the resulting material and it turned out to weigh more than the starting material

A ship leaves the island of Guam and sails a distance 300 at an angle 41.0 north of west.

yes it will be logical

ha XD no answer