3 x 1023 molecules of element Z have a mass of 38 g. What is the mass of 1 mole?

When aqueous solutions of ammonium carbonate and aluminum nitrate are mixed, aluminum carbonate precipitates as an insoluble solid while ammonium nitrate remains in solution.

Lab Questions 1. Why must the Alka-seltzer mixture in the beaker be stirred after the reaction is completed?

Write a balanced chemical equation for sodium oxide

How is bohrs model of the atom arranged? where the protons? nuetrons? electrons?

In an experiment to determine if the height of a cake is determined by the temperature at which is cooked, measuring the height of the cakes is an example of an

Why are two nonpolar substances able to dissolve in each other?

Which of the following illustrates the conservation of matter? A. SnO2 + H2 - -> Sn + 2 H2O B. 2 C + O2 - -> CO2 C. KOH + HBr - -> KBr + H2O D. 6 Cs + N2 - -> 6 Cs3N I want to say B?

AIDS is caused by?

In 1928, 47.5 g of a new element was isolated from 660 kg of the ore molybdenite. the percent by mass of this element in the ore was:

What does the direction and length of velocity vector indicate