Which of the following changes can alter the form of a substance but does not necessarily change it to the other substance?

a. physical changes

b. pressure changes

c. phase changes

d. all of the above

Select all of the answers that apply. Which of the following are ways the atmosphere supports life? contains trace gases blocks harmful UV rays transports and distributes heat cycles essential elements: C, O, and N

Given the following equation: Cu + 2 AgNO3 → Cu (NO3) 2 + 2 Ag How many moles of Cu are needed to react with 3.50 moles of AgNO3? mols

In the Marquis Color Test, the solution will turn what color in the presence of opiates? Blue Green Yellow Purple

Which statement describes a catalys

Witch symbol shows a cold front

Which best describes the molecules of an ideal gas

MgNH4PO4> Mg2P2O7+NH3+H2O

If 1.0 gram of matter was converted to energy, how much energy would be formed? A. 9.0 x 10-13 joules B. 9.0 x 1013 joules C. 3.0 x 1013 joules D. 3.0 x 108 joules

A piece of metal ore weighs 8.50 g. when a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 ml to 26.47 ml. what is the density of the ore?

Find the mass of 3.65 x 10^-2 mol K2SO4