A Classify each example as a physical change or a chemical change.a. crushing an aluminum canb. recycling used aluminum cans to make new aluminum cansc. aluminum combining with oxygen to form aluminum oxide.

Magnesium will burn in air to form both Mg3N2 and MgO. What mass of each product would be found if burning a 3.28 g sample of magnesium to completion produces a combined total of 5.09 g of the two products?  g Mg3N2  g MgO

Convert 51.7 calories to Joules.Answer in units of J.

A block of iron forming a pool of the liquid metal is correctly classified as A) Chemical change B) Both a chemical and a physical change C) Physical change D) Neither a chemical nor a physical change

Determine the mass of the sample based on the following data to two decimal places mass of crucible and cover 50.01 mass of crucible, cover, and sample before heating 51.05 mass of crucible, cover, and sample after heating 50.83

Which of the following changes is considered a chemical change? O a Dissolving of sugar in water. O b. Crushing rock salt O C. Evaporation of alcohol. O d. Melting of sodium chloride. e. Burning of wood. Clear my choice

Copper pennies Pour about 2 Tbs of vinegar into the bowl and add a 4 tsp of salt stir it up. Put about 5 pennies into the bowl and count the pennies to sit in the vinegar salt mixture for 5 minutes. Take out the pennies and rinse them out in some water. 1. What happens to the pennies? 2. Is it a physical or chemical change? Explain.

Which of the following is an example of a chemical change? a. water evaporating b. tearing paper into smaller pieces c. combining baking soda and vinegar d. mixing water and sugar