Calculate the number of moles of potassium, K, in 1.21 x 1024 atoms of potassium

The table below shows the rate at which four different species can adapt to changes in temperature. Rate of Adaptation Species Characteristics A 1 °C per million years B 1 °C per ten thousand years C 2 °C per million years D 2 °C per ten thousand

Which of the following shows the abbreviation for an SI unit of density? A. lb/mL B. g/cm3 C. L/kg D. kg/m2

There is a toxic poison gas in the air made of chlorine, argon, and rhenium Who made the poison gas A. Clarre B. Nathan C. Felex

Calculate the molarity of 0.700 mol of na2s in 1.05 l of solution.

Make a prediction for how to identify an unknown element and the chemical composition of a star

Carbon naturally occurs in two forms: diamond and graphite. Why do these two forms have very different properties?

How many moles of hydrogen are evolved when an excess of sodium metal is added to one mole of citric acid?

Write a net ionic equation for the reaction that occurs when barium sulfite (s) and excess hydrochloric acid (aq) are combined. Note: Sulfites follow the same solubility trends as sulfates.

A hydrate is a compound with water molecules incorporated into its crystal structure. In an experiment to find the percentage of water in the compound, the following data was recorded.

What do you get when you mix dog breeds such as a bulldog and a shih tzu?