Questions with the keyword 'chemical'

• Is it hard to measure chemicals in blood samples??????? by Crowsy is my name?? and 3 others. to Annette Comments: (so far, 3s comments )
• how is bismuth formed and what are some of it’s chemical reactions. thanks for your answers. by L to Annette, Dave, Jaine, Julio, Mike Comments: (No comments so far )
• is breathing in chemicals bad for you? by pablo burke to Mike, Annette Comments: (No comments so far )