What element is classified as an alkali metal?

A. Rb

B. Sr

C. Zr

D. Cl

If 3.0Ã-105 j of heat are added to the ice, what is the final temperature of the system?

For each pair of gases, select one that most likely has the highest rate of effusion. Use the periodic table if necessary

Which statements accurately describe electronic tools? Check all that apply.

Fireworks change blank into blank and blank energy.

How many moles of MgCl2 are there in 335 g of the compound?

How many moles of water are made from complete reaction of 1.4 moles of hydrogen gas? Given the reaction: 2H2 + O2 → 2H2O

A scientific law is 1. A university accepted conclusion based on testing 2. Always changing a new evidence is presented 3. Based on new evolving theories 4. Often debated in the scientific community 5. One step toward forming a theory

12 Two molecules of HBr collide and then form H2 and Br2. During the collision, the bonds in the HBr molecules are

If the two charges represented in the figure were brought near each other, they would a. have no effect on each other. b. repel each other. c. cause static discharge. d. attract each other.

A gas tank holds 20000 liters at 850 torr. If the temperature remains constant, what will the volume, in L, of the gas be at standard pressure, 760 torr?