Answer:
V2= 531.4 ml
Explanation:
T1= 273+45 °C= 318 Kelvin
T2= 273+65 °C= 338 Kelvin
V1= 500ml *( 0.001L/1ml)= 0.5 Liters
V2= = = 0.5314465409 Liters* (1 ml/0.001 L)= 531.4 ml
Answer: True
Explanation: Every atom of the same element has the same atomic number of number of protons in its core. This is why chemists say that an atom is defined by its atomic number of the number of protons.
Unlike neutrons and electrons, you can't change protons. You can change the number of neutrons and it will still be the same element, but one is going to be a little bit heavier or a little bit lighter than another.
In addition, you can change electrons which creates
ions or charged atoms.
However, you can't change the protons.
For example, hydrogen has 1 proton in its nucleus no matter what and helium has 2 protons in its nucleus no matter what and so on.
Answer:
Look them up.
Explanation:
sulphate is SO4 (2-)
Sufide is S(-1)
Sulfite - look it up - there are several more right there you may need.
Answer: 3, the amount per unit volume of a particular material
Grinding as it’s a physical not chemical change :)