You mix together two different substances. There is a loud noise, and a burst of flame. Which of the following is most likely to be true?

What is the basic notation for a proton?

The modern periodic table has groups

Why does an ionic compound conduct an electric current when the compound is melted but not when it is in the solid state?

What planet has the largest known mountain in the solar system Two Moons and a period of rotation equal to 24.6 hours

If you change the temperature of a gas but keep the volume the same, how does the pressure change?

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.