Question 6
1 pts
Which solid is likely hard, but brittle?
O Fe
o caO
O SiO2
OCCI4

Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar. question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Ineed to find the answer of this question because i dont understand it