An ion of zinc, Zn, has 28 electrons, 30 protons and 33 neutrons. What is its mass number

A process at constant T and P can be described as spontaneous if ΔG 0. Over what range of temperatures is the following process spontaneous? Assume that gases are at a pressure of 1 atm.

What makes up 90 percent of interstellar gas? hints what makes up 90 percent of interstellar gas? hydrogen carbon dioxide helium carbon monoxide?

What is radioactive isotopes

What flows but has definite volume

How many types of biodiversity Are there

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe

What's is a logical way that you could begin to investigate why your tire had low air pressure?

after balancing the redox equation FeCl3+Zn--->ZnCl2+Fe, what are the coefficients, in order from left to right?

Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. Calculate the number of moles in 47.51 g of Al2O3.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?