Which of these properties of an unknown liquid can be found using a beaker, a hot plate, and a temperature probe?
density
boiling point
oxygen level
chemical composition
Density and boiling point.
How many protons are in the element shown?
22
11
23
12
Na
The element is Sodium (Na). Sodium has 11 protons. So, the answer is 11.
alance the equation below. What coefficient would be in front of Na?
_____HCl + _____Na --> _____NaCl + _____H₂
1
2
3
4
The balanced equation is:
2HCl + 2Na --> 2NaCl + H₂
Therefore, the coefficient in front of Na would be 2.