Which of the following could result from a substance that undergoes a physical change?

a) Its chemical composition is altered.

b) It has an irreversible change.

c) It forms a new substance.

d) Its shape is altered.

What's a metaloid, science

What is the smallest unit that makes up matter a alloys b atoms c chemicals d molecules

How many moles of H2SO4 are needed to completely neutralize 0.0164 mol KOH

Determine the amount of significant figures: 11 soccer players

The average American student is in class for 330minutes/day. How many hours/day is this?

Is Ba (NO3) 2 covalent or ionic

An alcohol contains only C, H, and O. When a 1.50mg sample of the alcohol is burned completely in oxygen, 3.30mg of CO2 and 1.80mg of H20 are formed. What is the empirical formula for the alcohol?

Using the field meter, does the field strength increase or decrease as you move away from the bar magnet?

Complete each of the definitions with the appropriate phrase. Precision means that measurements are close to Accuracy means that measurements are close to Anawer Bank each other an accepted value |individual several

Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.4 mol h2/mol c2h2. (find properties of the reactants/products in appendix of book) a.