Calculate the number of atoms in a 8.42x10^3 g sample of cesium.

A0C3H7OH + a1O2 → a2CO2 + a3H2O

4. How many valence electrons do the elements in group 17 have?

Identify the activity that belongs in the field of chemistry. A. developing medicines B. analysis of a compound C. production of a new plastic D. all of the above

how many grams of water are needed to produce 28 grams of aluminum carbide (Al4C3) ? Al4C3 + H2O - -> 3CH4 + 4 Al (OH) 3

Why do you suppose cells use Ca2 (which is kept by Ca2 pumps at a cytosolic concentration of 10-7 M) for intracellular signaling and not another ion such as Na (which is kept by the Na pump at a cytosolic concentration of 10-3 M)

What is the net ionic equation for AgNO3 (aq) + Na2SO4 (aq)

What does it take to prove a hypothesis false? O A. It is impossible to prove a hypothesis false O B. At least ten examples O C. One counterexample O D. A poorly stated question

We dissolve 5g of sugar, C12H22O11, in water to make 1L solution. What is the concentration of this solution expressed as molarity.

Explain how the molar mass of a gas affects the rate at which the gas diffuses and effuses

Wat is a redox reaction