Which is the force of attraction that holds atoms together?

A) Physical bond

B) Chemical bond

C) Friction

D) Gravity

Liquid water and water vapor reach equilibrium only in a closed container. Why?

What kind of ions do acids release when dissolved in water?

The correctly balanced equation for H2O2 → H2O + O2 is A) H2O2 → 2H2O + O2 B) H2O2 → H2O + 2O2 C) 2H2O2 → 4H2O + O2 D) 2H2O2 → 2H2O + O2

2H2 + O2 - -> 2H2O How many grams of oxygen gas are required to produce 90. g of water?

3.4000*10^-6 + 5.7000*10^-3

The smallest unit of an element is a blank

How many sodium atoms will create an ionic bond with sulfur?

Rank the elements from smallest to largest electronegativity negativity (smallest at top) 1. N 2. P 3. As 4. Sb

A bicyclist pedaling up a Hill. What type of energy potential or kinetic?

What improvements have been made in modern farming? Select all that apply. 1. machines can do more work over less time 2. better seeds sprout and grow much more quickly 3. trains can transport food over long distances faster 4.