Which is evidence that a chemical reaction has likely occurred?

a liquid slowly losing volume

the formation of a precipitate

boiling water releasing steam

a change in the shape of a solid

This is a type of symbiotic relationship where both organisms benefit.

True or false: an ice cube melting to a liquid is reversible

What is the molarity of a 2.0 L sodium hydroxide solution containing 10.0 grams of solute

Express in scientific notation. Choose the answer with the proper number of significant figures. (3 x 10^4) (4 x 10^23) = ___ A. 12^27 B. 12 x 10^27 C. 10 x 10^27 D. 1 x 10^28 I thought it was B but that's incorrect

What do scientists use to predict the locations of electrons in atoms? probability algebra geometry ratios and proportions

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.

Is fire hot or cold?

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?

I have 2 electrons is the first shell, 8 in the second, and 6 in the third