*The of the substance does not increase or decrease during chemical reactions.* 1️⃣ volume
2️⃣ weight
3️⃣ mass
4️⃣ colour

All motion is caused by force? true or false

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent