When the number 2.35 is rounded to contain 2 significant figures it becomes 2.4?

A soild reactant is placed in to a beaker of warm water. The liquid vigorously bubbles as the solid dissolves into the solution. What will most likely happen if the temperature of the liquid is slighty reduce?

What is an atom? the smallest particle of matter a piece of an element the smallest molecule in the universe a combination of protons and neutrons

In which compound is the percent compositionby mass of chlorine equal to 42%? (1) HClO (gram-formula mass = 52 g/mol) (2) HClO2 (gram-formula mass = 68 g/mol) (3) HClO3 (gram-formula mass = 84 g/mol) (4) HClO4 (gram-formula mass = 100. g/mol)

2 A + 3 B Right arrow 4 C + 5 D In the first 120 s of the given reaction, 0.500 moles of B disappear. In that time period, what is the rate of appearance of C in mol/min?

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.

Charcoal appears black in color because it A) emits black-colored light. B) has a black-colored pigment. C) absorbs all wavelengths of light that fall on it. D) reflects all wavelengths of light that fall on it.

Determine the identity of the element that contains exactly three 4p electrons in the ground state

A substance that decreases hand increases ph when it dissociates in water is called

Why did scientists pre-Lavoisier believe that matter was destroyed in the burning fire experiment?

Describe the motions of particles in the 3 common states of matter