A piece of lead with a mass of 25g causes the water level in a graduated cylinder to rise 3ml. What is the density of the piece of lead.

Can u show with workings too i dont really get this.

Why is metal often used for cooking pan?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.