What is the atomic number of the element in Group 4A, and Period 5?

a. 68

b. 131

c. 222

d. 462

A 15.0 g-sample of a liquid has a density of 0.875 g/ml. what is the volume, in milliliters, of the liquid?

When a 36.7g sample of iron is placed in a graduated cylinder containing 20.0mL, the water level rises to 24.7mL. What is the density of iron?

How many grams of oxygen are formed when 8.20 moles of KOH are formed? 4 KO (s) + 2 H2O (l) → 4 KOH (s) + O2 (g)

Which of the following would you expect to see in the death of a star that is less than 0.5 solar mass A: supernova B: planetary nebula C: white dwarf D: red giant

Abbrevation of mass in the si unit

Transport means to move something from one place to another. True False

What are two reasons that ocean water sinks in the Arctic Ocean? A. The surface water is warmer and less salty than normal. B. The surface water is warmer and more salty than normal. C. The surface water is colder and less salty than normal. D.

Which statement best describes the conductivity of weak electrolytes, such as weak acids and bases? A) Weak electrolytes do not dissolve in water and can not conduct electricity.

Two speakers are placed side by side and are described as having constructive interference. How do you know when constructive interference of sound waves has occurred?

Write about "human impact"