List the seven clues that a chemical change is happening

Mass and weight are related by?

The dentist and at least one other dental auxiliary must be present, in the treatment room, during the administration of nitrous oxide

The coefficients in a chemical reaction tells Select one: the masses, in grams, of all reactants and products. the number of atoms in the reactants.

How do you find the atoms of nitrogen in this substance (NH4) 2CO3?

Which of the following pairs are isotopes of each other? A. 32S and 32P B. 18O and 18F C. 7Li and 9Be D. 14N and 15N

Justin Bleeber is a lazy young man and decides to burn a pile of leaves instead of bagging it. The pile of leaves weighed three pounds before being burned. After the leaves are burned the leftover ash weighs half a pound.

A diatomic gas has the molar mass 38.00 g/mol. What is a possible formula

Convert 3.5 x 10^23 K atoms to moles 0.58 moles 2.1 x 10^47 moles 5.8 x 10^45 moles 2.5 x 10^23 moles

Describe the composition of a lead storage battery

A 5.0g sample of aluminum with a specific heat of 0.90 j/g was heated from 22.1^c to 32.1^c. How much heat to the nearest joule did the aluminum gain?