What does the atomic number tell you about an atomwhat two particles add up to equal the mass number?

10. When a piece of steel wool is burned it gains mass. Which explanation is consistent with the law of conservation of mass? A. Matter from the air combined with the steel wool. B. Matter was created during the chemical reaction. C.

Consider a hypothetical element x that consists of two isotopes, one with a mass of 41.99998 amu and the other with a mass of 44.99987 amu. their percent abundances are 33.3333% and 66.6667%, respectively.

How many moles are in 16.94g of water?

If 4.8 moles of X and 3.4 moles of Y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3X + 2Y "yields" / X3Y2. A. 1.7 mol Y left over B. 1.6 mol X left over C. 0.

Predict whether the following solutions are acidic, basic, or nearly neutral: a. NaBr, b. K2SO3, c. NH4NO2, d. Cr (NO3). the answer is neutral, basic, acidic, acidic and i am not sure why

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