15.3 of an unknown substance was found to contain 0.15 moles. Calculate the relative formula mass of the substance.

What are two chemical characteristics of oxygen

Separation can be achieved when a reaction occurs in a mixture. the resulting mixture will have one chemical species in a solution and the other chemical species as a solid.

Describe how electron movement is related to the bonding in methane, CH4. A) Electrostatic sharing of electrons allows ionic bonds to form. B) The atomic orbitals overlap and share electrons to form covalent bonds.

A compound with formula AL (XF4) 3 contains (unidentified) element X, which is 11.3% by mass of the composition of the substance. What is identity of element X

What is the idea of continental Drift?

During what phase of the moon can a lunar eclipse occur? A) new moon B) first quarter C) waxing gibbous D) full moon

All bodies of water make up a earth's A. atmosphere B. asthenosphere C. hydrosphere D. lithosphere

Which characteristic provides clues to how igneous rocks were formes? A textures B color C luster D streaks

If your heart beats an average of 68 times per minute, how many times will your heart beat in an hour? In a day? In a week? Show all work

The gas described in parts a and b has a mass of 1.66 g. the sample is most likely which monatomic gas?