How many lone pairs of electrons are on the s atom in sf4?

When a radioactive isotope releases an alpha particle, the mass number of the atom is a. decreased by two. b. decreased by four. c. increased by two. d. increased by four.

Describe the process used to measure out a specific mass of a solid.

The energy that a log has is transformed when burned. How does the chemical energy of the log compare to the heat and light energy it is transformed into? The amount of chemical energy is equal to the amount of heat and light energy.

A substance changes state from solid to liquid. What has happened? O Aphysical change O A chemical change O A chemical reaction The creation of matter

The chemical formula for table sugar is c12h22o11. what can you tell from this formula

What volume will 0.710 moles of nitrogen gas occupy at STP?

4) Acompound has an empirical formula of Na2co3, and a molar mass of 3.18g/mol. Find its molecular formula.

How many molecules of glucose, C6H12O6, can be "burned" biologically when 283.2 grams of oxygen is a available?

Why does acids that has been accidentally spilled on a book cause the colour of the book cover and the ink to change?

How many moles of H2O will be required to make 19.2 moles of O2