Which identifies that a chemical reaction has occurred?

A. New substances are produced.

B. The color has changed.

C. Bubbles have formed.

D. Temperature has changed.

Which of the following contains most of the water on earth? A) the oceans B) watersheds C) the atmosphere D) ice and aquifers

calculate the final temperature of 202 mL of water initially at 32 degrees celsius upon absorption of 19 kJ of heat

B) How many kilograms of carbon dioxide are formed when 24.42 g of iron is produced?

Select the factor (s) that may be responsible for the ionization energy within a period. The valence electrons are further from the nucleus when moving from left to right.

What is the molar mass of Cu (OH) 2?

What elements make up the pain reliever acetaminophen, chemical formula C8H9O2N? Which element is present in the greatest proportion by number of particles?

How do I go from molecules to moles? For example 1.50e23 molecules NH3 how many moles are in this problem?

Which indicator is blue in a solution that has a pH of 5.6? (1) bromcresol green (3) methyl orange (2) bromthymol blue (4) thymol blue

Which of the following mass units is the largest? a) 1 cg b) 1 dg c) 1 mg d) 1 ng

What is the similarity between a meander and a gully?