How many grams are in 7.5 moles of chromium?

Which of the following is true of atoms with very high electronegativity? O A. They have a strong tendency to lose their electrons to other atoms. O B. They have a strong tendency to take electrons from other atoms. O C.

What is the most important safety rule in science? a. never work with chemicals. b. always use unbreakable glassware. c. always follow your teacher's instructions and textbook directions exactly. d. none of the above

Which compound contain an iron with a 3 + charge

CS3PO4 + Na2SO4 → Na3PO4 + Cs2SO4

This jar contains helium gas. what would happen if the lid of this jar was removed?

An analysis of 10.0 grams of sample of a compound is found to contain 27.0 percent sodium (na), 16.5 percent nitrogen (n), and 56.5 percent oxygen (o). determine the empirical formula of the compound.

All organic molecules contain carbon and hydrogen. what parts of an organic molecule may contain oxygen, nitrogen, or phosphorus?

Based on Reference Table J. which two reactants react spontaneously? (I) Mg (s) + ZnCl2 (aq) (2) Cu (s) + FeSO4 (aq) (3) Pb (s) + ZnCl2 (aq) (4) Co (s) + NaCl (aq)

Explain the difference between valance electrons and the other electrons

Describe the development of the modern periodic table