Have an account?
When logs burn in a fireplace, a chemical reaction is occurring. What is true about this reaction?
The reaction is endothermic because it absorbs energy (heat & light) from it surroundings.
The reaction is exothermic because it releases energy (heat & light) into its surroundings.
The reaction involves an ionic compound made up of a metal and nonmetal.
The reaction does not change break apart or change chemical bonds.
Which chemical formula below shows a covalent compound? (Hint: Nonmetal + Nonmetal)
Which chemical formula below shows an ionic compound? (Hint: Metal + Nonmetal)
Which type of chemical bond is formed when electrons are shared to help atoms reach octet?
[Slide 11 + 12]
Only protons are shared in chemical bonds.
Only neutrons are shared in chemical bonds.
Which equation below is balanced to follow the Law of Conservation of Mass?
Which of these substances below can be classified as a pure substance?
Which substance below would be considered a homogeneous mixture?
[Slide 49 + 50]
Chicken Noodle Soup
Which substance below is considered an acidic solution?
Vinegar (pH= 2.5)
Bleach (pH = 11)
Water (pH= 7)
Seawater (pH = 8)
How many atoms of oxygen (O) are represented in the chemical formula shown here?
2 oxygen atoms
4 oxygen atoms
1 oxygen atom
0 oxygen atoms
A strip of red litmus paper is dipped in an unknown solution. The red paper instantly turns a dark blue color.
What do we know about the solution?
The solution is an acid.
The solution is a base.
The solution is neutral.