Which examples represent chemical changes? Check all that apply.

burning wood

souring milk

melting copper to join two copper pipes together

browning of a cut apple

cutting a potato into small pieces

While in Europe, if you drive 123 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 24.0 mi/gal? Assume that 1euro=1.26dollars. Express your answer numerically in dollars.

What type of weathering breaks down into smaller pieces

If honey has a density of 1.36 g/ml what is the mass of 1.25 qt reported in kilograms

If you burn 50.6 g of hydrogen and produce 452 g of water, how much oxygen reacted?

Explain why the atmosphere is classified as a mixture

How does protein substance in an animal hide or skin be prevented from bacterial infection during the process of tanning? * a. By soaking in water b. By deliming using an acid c. By brine curing d. By scudding with dull knife

Nonpolar materials have separated positive and negative areas. True False

Large rocks being blasted to make way for the construction of a tunnel is an example of what type of weathering? A. Chemical B. Mechanical C. Deposition D. Erosion

A criminalist uses a fluorescent chemical called rhodamine, cyanoacrylate fumes, and a uv light source to see a fingerprint on a gun. Which type of evidence is he detecting? Gross evidence latent evidence direct evidence trace evidence

Which of the following energy changes occurs as a ball bounces