A sample of ph3 has mass 27.5g how many molecules are in this sample

A Change in matter that can be seen through direct observation are called?

in physics class Annie is designing a small circuit that can operate a mixer identify the device she should use in the circuit and you should use a blank to transfer electric energy into motion

Each of the compounds that you tests contained chlorine, which is a poisonous gas. Why was this test safe to perform (it was, or your lungs would have turned to mush) without a gas mask?

If the following elements were to form ions, they would attain the same number of electrons as which noble gas? elements: As, S, Na, Rb noble gas: He, Ne, Ar, Kr

What is the living part of an ecosystem called?

You see rainforests a is far as the eye can see It rains every day and the humidity is fiercel Where might you be? Polar climate Tropical climate Subtropical climate Temperate climate

2. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

Which of the following correctly describes a compound?

If the [H+] of a solution is 1.0 x 10 to the power of - 2 mol/L the pH is: (pH = - log (H+] 1 12 -2 2 chemistry

Change 5.20 moles of c3h6o2to grams