What is the ratio for calcium bicarbonate

If a neutral atom of oxygen (O) has 8 protons, 8 electrons and 7 neutrons, what is the mass number of this atom? A. 8 B. 15 C. 16 D. 23

There are 18 periods in the periodic table. Which answer choice rewords the false statement so it is true?

Which of the elements listed is the most abundant extracellular anion?

The energy that is stored in food is ... A. Potential energy B. Kinetic energy. Or C. Nuclear energy

Jim measures the side of a box and finds it to be 0.564 meters long. How long is it in centimeters a) 0.00564 b) 0.564 c) 5.64 d) 56.4

When conducting an experiment, a scientist should: (a) attempt to test every possibility (b) attempt to control the conditions (c) place no limits on the investigation (c) proceed without specific goals

Can atoms be divided into smaller pieces

How many atoms are in 1.25 moles of calcium acetate, ca (c² h³ o²) ²?

What is a physical change? A change in matter from one form to another without becoming a new substance. A change in matter that results in a chemical reaction. A change in matter that results in the smallest unit of a compound.

You are in the room with several objects, the temperature in the room is 21 celcius, what can you assume about the temperatures of the objects in the room?