State the name for a group of atoms held together by covalent bonds

Why methylene blue is blue

What is the empirical formula of a compound if a sample contains 5.97 grams of carbon and 0.99 grams of hydrogen?

An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide. choses autotroph or heterotroph

Consider the balanced chemical reaction below. When the reaction was carried out, the calculated theoretical yield for carbon dioxide was 93.7 grams, but the measured yield was 88.3 grams. What is the percent yield?

A cup of cocoa is left on the counter. Which best describes how its temperature changes? a) the heat leaves the cup of cocoa b) cold enters the cup of cocoa c) the molecules in the cocoa speed up d) the temperature will not change

Give two examples of chemical energy being transformed into electrical energy

Name the following compounds. NH4OH

How many minutes will be required to deposit 1.00 g of chromium metal from an aqueous?

Does a gas discharge tube filled with boron emit the same wavelength

What is HNO3 it's formula