Which of the following are observations Pick all correct choices

The candle floats.

The tires are flat.

The dog is barking.

The tire is flat because of a decrease in temperature.

If a person walks by, then the dog will bark.

In an atom of argon-40, the number of protons (1) equals the number of electrons (2) equals the number of neutrons (3) is less than the number of electrons (4) is greater than the number of electrons

At room temperature, the solubility of which solute in water would be most affected by a change in pressure? (1) methanol (3) carbon dioxide (2) sugar (4) sodium nitrate

What is the definition of a Lewis acid? o a substance that accepts electrons to form a covalent bond O a substance that donates electrons to form a covalent bond a substance that accepts a proton O a substance that donates a proton

The minimum amount of energy necessary to start a chemical reaction is activation energy kinetic energy enthalpy entropy

A truck drives at an average speed of 100 km/h. How far can it travel in 30 minutes? A. 30 km B. 50 km C. 80 km D. 100 km

Which type of reaction will occur when equal volumes of 0.1 M HCl and 0.1 M NaOH are mixed 1. Neutralization 2. Ionization 3. Electrolysis 4. Hydrolysis

What is molarity of heavy water?

Do all liquids freeze at the same rate

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none