What happens to the total mass pf the chemicals involved in the reaction as the reaction proceeds

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood