Question

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

Answer 1

How many protons are in the element shown?

22
11
23
12

Na

Answer 2

alance the equation below. What coefficient would be in front of Na?

_____HCl + _____Na --> _____NaCl + _____H₂

1
2
3
4

Answer 3

Density and boiling point.

Answer 4

The element is Sodium (Na). Sodium has 11 protons. So, the answer is 11.

Answer 5

The balanced equation is:

2HCl + 2Na --> 2NaCl + H₂

Therefore, the coefficient in front of Na would be 2.