Which substance represents a compound?

1. CS2 (s)

2. Cs (s)

3. C (s)

4. O2 (9)

What would you predict about a chemical that has a hydrogen ion concentration of 1*10 to the - 12 It is basic It is acidic It is a buffer It has a pH of 7

Is cutting a sheet of paper in half a physical or chemical change

How do you write balanced chemical formulas

How are isotopos defined? forms of different elements that have the same number of neutrons in each atom forms of different elements that have the same number of protons in each atom forms of the same element that differ in the number of neutrons in

What is the mass in grams of 19.26 mL of acetone? The density of acetone is 0.7857g/cm^3

Using activated charcoal to separate heavy metals from water is a process known as scrubbing. True or False

If 119.5 g of iron is mixed with 279.50 g of copper (II) nitrate, what is the limiting reagent for the reaction?

Write and balance the double replacement reaction between barium sulfate and titanium (II) oxide.

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?