Which contains 3 significant figures.

A. 5.0x10^2

B. 500

C. 0.001

D. 1.00x10^-3

E. 0.00100

F. 395

Which of the following elements will likely form a negative ion in its ionic compounds?

Citric acid (h3c6h5o7) is a product of the fermentation of sucrose (c12h22o11) in air. determine the mass of citric acid produced when 2.50 mol c12h22o11 is used. the balanced equation is: c12h22o11 + 3 o2 → 2 h3c6h5o7 + 3 h2o

When atoms of two or more elements are chemically bonded the substance formed is a?

Why does maximizing the surface area of the core increase the effectiveness of a catalytic converter

Consider the reaction below. Mg (s) + 2HCl (aq) - - > H2 (g) + MgCl2 (aq) What is the most likely effect of an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases.

How many moles are contained in each number of grams of table sugar (c12h22o11, molar mass 342.3 g/mol) ?

6. Which atomic particle has a positive (+) charge?

One reason ionic compounds do not dissolve well in nonpolar solvents is that ___. a. ion-solvent interactions are not strong enough to solvate the ions in solution. b.

Muscles undergo fermentation when no carbon dioxide is available. no oxygen is available. no pyruvate is available. no water is available. no atp is available.

Which of the following is evidence of a chemical change? phase change the formation of a gas mass change change in surface area