science and technological advances are constantly changing how people live and work. discuss a change you have observed in your lifetime that has made life easier or more enjoyable for you.

What type or process is involved in going from elements to compounds and vice versa

A girl is pedaling her bicycle at a velocity of 10 km/hr around town. How far will she travel in two hours?

When an atom loses an electron, what does it become? a. A positive ion b. A neutral ion c. A negative ion d. A neutral atom

Hexokinase iv has a km value that is substantially higher than the km for other hexokinases. what is the significance of this fact?

Which of these sets of elements has similar properties? chromium, magnesium, iron, cobalt oxygen, nitrogen, carbon strontium, magnesium, calcium, beryllium hydrogen, helium, neon

After a particularly cold day outside you go home to make some tea. you heat the water in the mug so that botch are about 75 degrees celcious. the tea bag is only 30 degrees celcious and the room is around 26 degrees celcious.

For main-group elements using the older numbering system the group number on the periodic table corresponds to which characteristic of the elements of that group

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.

Which of the following solutions contains the largest total concentration of ions, assuming complete dissociation .010 M aluminum chloride .010M sodium chloride .010M aluminum sulfate .010M calcium chloride

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.