How many mg of calcium are present in a 500-mg tablet of calcium carbonate? ?

Clasificar las siguientes mezclas como homogéneas o heterogéneas a. Un balde con bolas de diferente color () b. Arena de playa () c. Una muestra de sal con agua () d. Aire () e. Sangre () f. Una ensalada de frutas () g. Cubos de hielo con agua () h.

What will be the effect on the pressure inside a container of gas if the temperature of the gas is decreased?

What is the process of grouping similar things together

A mixture of oxygen, hydrogen, and nitrogen exerts a total pressure of 378 kPa. If the partial pressures of oxygen and hydrogen are 212 kPa and 101 kPa respectively, what is the partial pressure exerted by nitrogen?

What is cold source of light

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?

Which elements can react to produce a molecular compound?

Who created the periodic table and in what year?