Select all that is true.

a) h20 is another meaning of air.

b) h20 is another meaning of water

c) water is not important.

* BTW this is just for fun

What does the atomic number of an element specify? what does the atomic number of an element specify?

When a wave moves, what happens to the medium? A it moves forward with the wave B it moves only perpendicular to the energy of the wave C it moves up and down or back and forth, but it does not move forward with the wave D it moves only parallel to

Is hammering wood together a physical or chemical change?

When two hydrogen atoms combine with an oxygen atom, they form water. This combination is known as: A. an atom. B. a molecule. C. a chemical. D. a complex system.

A chemical reaction with an initial quantity of 1.35 moles of gas is performed in a 4.50-L flask at 24.7°C and under 1.07 atm of pressure. After the reaction is complete the final temperature is 55.2°C with a pressure of 2.92 atm.

Which of the following is an example of an endothermic process? condensation evaporation burning freezing

Which of the following is the correct formula for copper (1) sulfate trihydrate? o Cu 250 4.3H 20 o CuSO 4 - 3H 20 o Cu 250 4 (H 20) 3 CusO 4 (H 2013

Discuss the advantages and disadvantages of using hydropower for large-scale energy production.

Is the following is a correct statement of Charless Law? The volume of a gas varies directly with the absolute temperature under the conditions of constant pressure.

Why do you need blood?